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Joined Oct 2010
1,375 Posts
Yeah, this is one thing i certainly wish they would provide us a firmware update for.
Joined Sep 2012
342 Posts
Yesterday i had two strange crashs.
First on the v450 during a slow flight the shaft of the brushless motor broke apart.
I was able to land the bird safely without further damage.
Next flight the Master CP the same thing happend again, shaft from the brushless motor broke and the copter crashed into the mud.
On both birds the pionion and shaft were stuck in the frame...
So what did we do, i cut of 2 hex-drivers an used this to for a replacement shaft
Best steel-quality, this shafts will never ever break again
If it was cold and wet, maybe the moisture built up on the 2 gears causing a binding situation which broke the shafts. It's amazing how the down wash from the rotor blades will cool off things.
Joined Sep 2012
342 Posts
It was pretty warm yesterday for a december in Germany, we had 8degrees celsius.
The white stuff is glasfibre, i had to fix my frame after a ball link broke during flight two weeks ago. The RX holder was broken after that crash
Hi All
Thought I would add my review of the Master CP. I got it 1 week ago and have flow it hard and heavy to see what it does. My skill is that of some mild 3D such as rolls, flips, loops, inverted but really not fast backwards flight and and the heavy 3D. I own a V120D02sV2, Trex 450 Flybarless, Trex 500 and Genius CP. I bought this to see if it would do better 3D than the CP which drives me nuts for its inconsistency and the 120 which is very sensitive.
I used TomZ's info for set-up and took it out.
1st Flights: Super stable, lift offs were the easiest of any heli, slight drift to left but that stops once out of the prop wash and gyros take over. Hovered great and very little adjustments o keep it in one spot. Forward flight, stays on its line with little change in altitude during turns. Backward flight...same, kept its line through out. It seems to be slower than the V120 and handles more like my 450 for docile flight. Toms curves are spot on for easy flight. Landed after 6 minutes of flight time. You can here the motor slow down so you know its time to land. A big plus as opposed to the brushless others, you have power...you have none.
Put in 2nd Battery and flipped it to ST1 and ST2. 3D time.
Loops...oh, boy..get some altitude, it don't care for them, slow and big (done in Normal). In ST1/2 much better, sorta the loop flip combo.
Flips...sorta loopy but good and very little side roll.
Rolls..same, loopy but OK.
Inverted...great but lot of throttle stick movement.
Changed to 100% flat throttle on ST2 and it all changed. Fast flips, rolls loops and great inverted with very little stick movement.
5 Minute flight time and landed it. I'm impressed and it is fun to fly.
Adjusted expo as it seems to me that it is not very responsive right away. I just fly with very little or no expo.
My opinion is it was well worth the 130 bucks & Battery. Easier to see, handles very docile if you want it and will do 3D. But the big test will come when I plant it, like I do with all.
So, 1 week later I messed up while pulling out of inverted on 100% PC, hit the Throttle hold as I knew what was coming and Blam...Explosion of pieces! I have never had a heli come apart like that. I have hit the ground hard with the 450 and 500 and never seem parts fly like that, blade pieces yes, but not like that.
Yes, the throttle hold does not shut down the blades right away, they don't stop spinning on the 450 or 500 either, mass keeps them going. It was a nose in sideways hit on grass.
Damage. Canopy in 15 pieces, frame snapped off at end of RX, tail boom bent, tail rotor stabilizer cracked, main gear toast and jesus pin bent. Surprisingly everything in head is OK and so are main blades and gear
Now my review can be complete. It was a very hard crash and it really suffered minor damage. Helis week spots are
Main Gear...Frame (I never broke a frame before)...Canopy..Tail boom.
Rotor head, blades, and landing gear are super strong. Nothing is out of alignment or bent. Never had that happen either on a hard crash. So on stock up, keep that in mind.
Servos were fine and still are. I must have got a good one as its been handling 3D and the crash with no issues. Then again, when I used to damage servos the damage came when I was still trying to save it till the very end. I have now learned that if you know the crash is coming, hit TH and let go of the sticks. Stops 95% of servo failures.
Overall, I am still very happy with this heli. You can fly it slow with no issues, flys straight and level, hovers great and is not super sensitive. Mild 3D is also good, not near as good as a Trex 450 but also way cheaper.
This would be a good heli to start CP if you don't want a Mini or Genius, but it will not handle the crash like those indestructible little things. I like the size and sound and its 3D. It has my longest inverted hover time yet. For what it is....It will be a keeper for me.
Sweden, Helsingborg
Joined Jun 2012
4,582 Posts
I also forgot to inform everyone. If you order the Main Gear, good old Walkera does not give you the jesus screw. You have to order the screw kit also.
PS: Working those little tail wire is not "Humanized" its a PITA. Plus the little screw that holds on the tail rotor on had the head stripped from the factory. Thanks guys, that was fun to remove.
Xermalk is 100% correct. The CP keeps on spinning for 2 seconds after hitting Throttle hold. Not good as I usually wait until the last second before I hit it. So, it pretty much is useless to prevent damage. Now I see why it exploded the way it did.
For what good it does I am going to ask Walkera if there is a way to stop this.
Joined Dec 2003
2,150 Posts
Joined Oct 2010
1,375 Posts
Hong Kong
Joined Jan 2010
6,533 Posts
My impression is that the delay is not as long as 2 seconds. It is more like 0.5 secs. I don't have a Devo compatible transmitter to check it now. I wonder if anybody could check this out with an unattached motor?
I have had over 20 crashes and the only crash that was a serious as RamboSmurf's was due a straight drop of 20 ft onto concrete ground. That occurred after hitting a tree.
Otherwise, my main problem with the gyro is that the heli pitches forwards badly as I roll it into an inverted position. This is worse with R rolls than L rolls and I have been caught out from time to time.
What I found interesting is that my flying with the V120D02S improved after flying the Master CP. This is despite not being to do anything near as much as I could on the V120D02S. It could be that I am less intimated now after flying 3D with a larger heli.
Joined Dec 2003
2,150 Posts
Joined Oct 2010
1,375 Posts
I agree with the rolls. Right side is a sideways loop roll thingy, left better. I usually back flip to go inverted. That's what actually caused my crash, it rolled and nosed. I got it 3/4 around but couldn't get out of the dive as I wasn't inverted or upright, so at the last second I hit TH. Well now I know it has to be earlier than that.
My V120 is down due to one of the Lighted Christmas Reindeer jumping in front of it and it stripped a servo. Bad Deer. I'm taking the rest of the week off.
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text:
TEMPE, Ariz. - Emmitt Smith has made an impact on his new Arizona teammates and coaches after just seven days of minicamp workouts.
"It's just amazing, man," wide receiver Bryan Gilmore said. "A Hall of Fame guy coming to work every day and handling his business like he should."
The Cardinals wrapped up a four-day veterans minicamp Friday. Smith, the NFL's career rushing leader, said he's more convinced than ever that he still has what it takes to succeed.
"It's not really about proving that I've still got it. In my mind, I know I still have it," he said. "I can see that every day I'm out here training, working out with these guys, competing with these guys in one-on-one drills and stuff like that. I know I can still play."
Smith and coach Dave McGinnis have quickly developed a mutual admiration.
"The minute we signed Emmitt he was out here mixing right in with his new teammates, out here running 15 110s in the hot sun, in there in the weight room at 6:30 in the morning," McGinnis said.
"That's why he is what he is."
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Samsung Galaxy Note 8.0 Tablet - Android 4.1 Jelly Bean, Quad-Core 1.6GHz Processor, 8" Touchscreen, 16GB Storage, WiFi, Dual Webcams, S Pen, White - GT-N5110ZWYXAR Includes $25 Google P (RefurbishedItem#: S203-80100 RF | Model#: GT-N5110ZWYXAR |
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Samsung Galaxy Note 8" Android 4.1 16GB Tab REFURB Product Details
Samsung Galaxy Note 8.0 Tablet
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text: Triple XBox By Special Ed Have you ever been so into a video game that you'd rather keep playing than... more »Have you ever been so into a video game that you'd rather keep playing than have sex with your girlfriend? Yea, me neither... This sketch asks the question! "What if?" Starring Abhaya Hess Hollis Zemany Written & Directed by Alex Mathews Special Ed Films is Michael Ciriaco, Tim Hahn, Michael Kohl, Tim Marrinan, Alex Mathews, & Ian Robertson « less Published November 15, 2007 5.6k views More Info » Full Credits Special Ed Uploader Stats & Data 37 Funny Votes 49 Die Votes 5,616 Views Published: November 15, 2007 Categories: Sketch Keywords: Have You Ever Been video game Have sex triple xbox xxx Video games sex sexy girlfriend Special Ed films sketch comedy Up Next: Guess What? AUTOPLAY Up Next In: 10 Guess What? The Curious Latino Happy Birthday Aids Pinkberry: A Cautionary Tale Follow Facebook Twitter Tumblr Instagram Browse Related Comments 10+ more View All ▶ Special Ed Vaguely Related Videos Vaguely Related Pics & Words Advertisement Tags: Have You Ever Been video game Have sex triple xbox Advertisement


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CARS accepts car donations for San Diego City College Foundation and over 500 other non-profit organizations throughout the United States.
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If you prefer to contact us by phone, please call 855-500-RIDE or 855-500-7433 and one of our representatives will help you with your donation.
We have partnered with San Diego City College Foundation to accept vehicle donations on their behalf.
Steps required to donate a car
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Car Donation FAQ
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- Overview
- Transcript
- View Offline
Now let's export how Final Cut Pro X handles B-roll with something called connected clips. Now we've use connected clips a few times in earlier movies, but let's really dig in a little deeper so you can really wrap your head around it. Go ahead and step into the Connected Clips project. Now as you see we don't have any B-roll or cutaway footage above Pablo's interview. Let's go ahead and focus in on his interview. I am going to go Command+Plus to zoom in and I'm going to scroll up just to make sure that I have a little space above here on the top.
Now I want to make sure that we have sometime to put a lower third in, so I probably want to bring my first B-roll cutaway in at this point. Now I want to find all the shots with Pablo in them. Well, thanks to the fact that we were able to keyword Pablo into many of the shots, I simply select the entire Event Library and I'll type Pablo into the search field. Immediately, I have all the shots that I put the metadata in that we see Pablo dancing. So the first thing is let's start with a nice establishing shot of him sitting on the floor.
So I can click and scrub through and pick a nice range that I want and I guess about three seconds works. Now that I'm happy with the range, I can bring this connected clip on in one of two ways. I'm going to bring it on with the keyboard shortcut of Q. If you notice, the connected clip is now attached to the main storyboard. I can go ahead and bring in another cutaway a little bit later. Let's go ahead and grab a shot of Pablo dancing. Once I have this range, I'm going to bring this one into our Timeline with a drag and connect it to a later part of the clip.
Now I want you to see something very interesting. If I go ahead and I move Pablo's clip either earlier or later in the Timeline, these video cutaways stay with his interview. And this is the beauty of the connected Timeline. Once I attach video to an interview or B-roll to a narration, I can move that narration or video anywhere I want and the B-roll stays exactly where I want. And I can still edit this B-roll. Let's say for example I wanted to lengthen this clip of Pablo on the floor.
I can simply drag it to the right and if you notice if I drag it far enough to the right, instead of having a clip collision, where I couldn't drag it any further, it lets me drag it as far as I want and it moves the other clip out of the way. Now if want the second clip to happen earlier, I just simply move that to the left or move that to the right. I could even put it over the middle of the clip, so we cut away from Pablo on the floor, to Pablo dancing, to Pablo back on the floor. If I move the Pablo clip on the floor back to the left leaving a space you'll see that immediately the Pablo dance clip will pop down and be directly adjacent to our storyline.
Let's go ahead and add one more clip for cutaways. I really like what Pablo's doing in this next clip, so I'm going to pick that as my third clip. And I will again bring it down to the Timeline and if I bring it close to the second clip, you see we'll actually snap into place. But I do want to point something out about connected clips. These clips are not connected to each other. They're connected to the main storyline.
So if I wanted to move them as a group, I have to do one of two things. I'd have to select them all and drag them at that point, because if I selected just one, it moves it out of the way. Sometimes it's a lot more convenient to link these clips together, and to do that I'll select these clips and I'll right-click on them and I'll create a storyline just out of my B-roll. Now as soon as I do that, take a look at what happens to the top of the clip. There is a thin gray line that indicates these three clips work together in concert.
So now if I wanted to move all three clips, I can just simply grab the gray bar, position it exactly where I want the event to happen, and keep editing. Let's go ahead and watch the cutaways and Pablo's interview. (Pablo: And it's really not just a taking the class, having a teacher.) (Pablo: It's more of a taking the class, having a teacher, becoming friends, getting to know the person.) (Pablo: And really not just being friends but being?) And even though these clips are now in their own storyline, I can still extend this clip because we don't quite see the end of Pablo's move.
And there we go. (Pablo: And really not just being friends but being (inaudible) but also being friends (inaudible)?) So don't be afraid that Final Cut Pro X doesn't have tracks, because connected clips solve that problem. As a matter of fact, I can stack as many connected clips on top of each other as I need and they will stay in sync with the video that they're attached to.
This course helps experienced Final Cut Pro editors understand new ways of performing traditional editing techniques. New terminology and new tools for performing editing functions are also clarified.
- Touring the X interface
- Running Final Cut Pro 7 and X on the same machine
- Importing and analyzing media
- New editing methods (including append and connected clips)
- Timeline editing (including ripple, roll, slip, and slide edits)
- Adding audio
- Fine-tuning with the Precision Editor
- Adding and adjusting transitions
- Creating titles
- Applying motion effects to clips
- Performing color corrections
- Exporting
- Archiving and collaboration


text:
Tellu 3.0.0: Inventory Management and Scripting
Inventory management software Tellu has been completely reworked and is now available in version 3.0.0.
Tellu's software architecture is split into four parts: agents in versions for Linux/UNIX, Mac OS X and Windows; a server in three different programs; the Tellu Skin user interface; and the Telmon monitoring client for X11.
MySQL and OpenLDAP serve as central data storage. As of version 3, the Tellu Expression Language (TEL) provides a simple scripting language to automate database operations.
The agents on the inspected machines collect lots of data such as operating system releases, hardware information, memory usage, network configuration, installed software and running processes. Multiple machines can be grouped in so-called factions, such as resources required for a certain project. Database entries can also include attachments, for example, driver programs or user guides.
Tellu 3.0.0 is ready for download as separate components from the BerliOS project page. The Windows agent is precompiled while others are in source code archives. Tellu is under the original BSD license.
Issue 192/2016
Buy this issue as a PDF
Nextcloud Announces Raspberry Pi-Powered Home Cloud Box
Innovative system adds a hard drive and Ubuntu Core to the RPi for an IoT hub.
Linus Torvalds Confirms the Date of the First Linux Release
Linux is two weeks younger than we thought!
End of OpenOffice?
The Apache Software Foundation considers retiring OpenOffice
Adobe Gives New Life to NPAPI Plugin for Linux
Adobe won't kill the plugin in 2017
LinuxCon North America Convenes in Toronto, Canada
Linux Foundation's big event celebrates the 25th anniversary of Linux
Linux Turns 25
Linux has evolved from "won't be a professional" project to one of the most professional software projects in the history of computers.
Mirantis Joins Hands with SUSE To Offer RHEL Support; Red Hat Not Happy
Competitors get in the game with RHEL without Red Hat
Linux on Windows 10 Poses a Security Risk
Security researchers have already notified Microsoft; some fixes are available
Mirantis to Refactor OpenStack Fuel for Kubernetes
The company is collaborating with Google and Intel to use Kubernetes as an engine for Fuel
Canonical Joins Document Foundation Advisory Board
The upcoming release of LibreOffice will be available as a snap package


text:
Media Relations
Press Release:
MEDIA CONTACT: Gisele Galoustian
561-297-2010, firstname.lastname@example.com
FAU Researcher Receives $2.1 Million for a Cooperative Agreement Contract from the South Florida Water Management District for Kissimmee River Restoration
BOCA RATON, FL (February 10, 2009) — Florida Atlantic University researcher Dr. Leonard Berry, distinguished professor and director of the Center for Environmental Studies in the Charles E. Schmidt College of Science, has received a $2.1 million cooperative agreement contract from the South Florida Water Management District (SFWMD) to support ongoing research into restoring the ecosystem of the Kissimmee River. The project is titled "Environmental Outreach, Field Support and Riverwoods Site Maintenance." FAU has entered into a five-year contract with the SFWMD for onsite management, general site maintenance and field operations support for the Riverwoods Field Laboratory, a 15-acre property located on a remnant run of the Kissimmee River approximately 23 miles north of the city of Okeechobee under the onsite leadership of Riverwoods Field Laboratory Director Loisa Kerwin.
"The South Florida Water Management District is very excited to maintain the good working relationship with Florida Atlantic University's Center for Environmental Studies for the management of the Riverwoods Field Laboratory. Because this facility serves as the base for field operations, it is vital to the continued success of the comprehensive Kissimmee River Restoration Evaluation Program," said Lawrence Glenn, director of the Kissimmee Division at the South Florida Water Management District.
Among the vital research and support services that will be provided by FAU include on-site presence, major storm preparations and recovery, grounds maintenance, technical and scientific support, group tours for river restoration inspections, and assistance with field emergencies. In addition, funding will ultimately support a team of two environmental scientists and two field technicians who will assist senior scientists with field data collection, laboratory processing and administrative duties.
"The Kissimmee River restoration is one of the success stories of the Everglades restoration," said Berry. "The stretch of the Kissimmee River that has been restored is reforming the flood plain ecosystem in a dynamic way, and our Center for Environmental Studies has played a small but continuing part in this effort, from early identification of the viability of dormant native seeds in the fill to ongoing education about the progress and impacts of restoration at the Riverwoods Field Laboratory site on the river."
The grant will enable FAU to support the SFWMD with ongoing research into restoring this ecosystem, and with additional funds from a series of smaller grants, will enable the Center to work with the SFWMD to educate a wide range of stakeholders about the restoration, including underserved schools, teachers, graduate students and the general public.
Since 1994, the Riverwoods Field Laboratory has been operated as a staging area in support of field operations associated with the Kissimmee River Restoration Evaluation Program (KRREP). The facility also functions as an environmental education and outreach center for secondary students and adults. The KRREP is a structured program designed to evaluate ecosystem response to restoration and determine progress towards reestablishing ecological integrity to the Kissimmee River and associated floodplain. The restoration program is part of the SFWMD's cost share with the U.S. Army Corps of Engineers as defined by the Project Cooperation Agreement executed in March 1994.
The historic Kissimmee River flowed 103 miles from the Kissimmee Chain of Lakes into Lake Okeechobee. Its 1-2 mile wide floodplain offered a large patchwork of wetland habitats for many unique species, including more than 35 species of fish, 16 species of wading birds, 16 species of waterfowl, river otters, many species of invertebrates, amphibians, reptiles, and other plants and animals. In the 1960s, the river was channelized by the U.S. Army Corps of Engineers as a result of public pressure to provide more adequate flood protection. The 103-mile winding path of the Kissimmee River was transformed into a 56-mile long, 30-ft. deep, 300-ft. wide canal, known today as the C-38 canal.
The Kissimmee River Restoration Project will backfill 22 miles of the C-38 canal, reestablish approximately 45 miles on contiguous river channel and provide hydrologic connectivity to over 20,000 hectares of adjacent floodplain wetlands. Over 320 fish and wildlife species are expected to benefit from the restoration. Scientists from the South Florida Water Management District and FAU continue to monitor interim ecological response within the Phase I area. Ultimately, targets established for 25 abiotic and biotic performance measures will be evaluated to determine if the ecological integrity goal has been met.
For more information, contact Loisa Kerwin at 863-462-0025 or firstname.lastname@example.com or visit http://riverwoods.ces.fau.edu.
Florida Atlantic University opened its doors in 1964 as the fifth public university in Florida. Today, the University serv es more than 26,000 undergraduate and graduate students on seven campuses strategically located along 150 miles of Florida's southeastern coastline. Building on its rich tradition as a teaching university, with a world-class faculty, FAU hosts ten colleges: College of Architecture, Urban & Public Affairs, Dorothy F. Schmidt College of Arts & Letters, the Charles E. Schmidt College of Biomedical Science, the Barry Kaye College of Business, the College of Education, the College of Engineering & Computer Science, the Harriet L. Wilkes Honors College, the Graduate College, the Christine E. Lynn College of Nursing and the Charles E. Schmidt College of Science.


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Sony Xperia Z1 Review
Latest Camera Reviews
Panasonic Lumix DMC-G80 Review
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Too many megapixels as usual.
pics taken by me from xperia z1 without post processing.
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1080p, 30fps ,20 megapixel, 27mm, 5 inch LCD, cameraphone, GPS, hd, hd video, panorama, phone, review, smartphone, sony, Sony Xperia Z1 Review, sweep, test, wide-angle, xperia, xperia z1, z1


text:
Journal of Colloid And Interface Science (v.294, #2)
Editorial Board (CO1).
Adsorption of Basic Yellow 28 from aqueous solutions with clinoptilolite and amberlite by Julide Yener; Turkan Kopac; Gulsen Dogu; Timur Dogu (255-264).
The objective of this study was to investigate the adsorption of Basic Yellow 28 that is a cationic dye on clinoptilolite and amberlite XAD-4. Both equilibrium and batch rate adsorption in aqueous solutions of the dyestuff were investigated. Adsorption rate data were analysed using the pseudo-first order kinetic model of Lagergren and the pseudo-second order model to determine adsorption rate constants at 20, 30 and 40 °C. The adsorption equilibrium data were analysed using various adsorption isotherm models and the results have shown that adsorption behaviour of Basic Yellow 28 by clinoptilolite and amberlite could be described by either Langmuir or Freundlich models. Langmuir adsorption isotherm constants corresponding to adsorption capacity, Q 0 , were found to be 59.6, 52.9 and 56.7 mg/g for clinoptilolite at 20, 30 and 40 °C, respectively. Lower adsorption capacities for Basic Yellow 28 on amberlite were obtained. The increase of adsorption rate constants with an increase in temperature for BY 28 adsorption on amberlite indicated chemisorption with dissociation and increased availability of sites due to higher penetration of adsorbing molecules into the pores.
Keywords: Clinoptilolite; Amberlite XAD-4; Basic Yellow 28 dye; Adsorption isotherms; Adsorption rate;
Mechanistic modeling of arsenic retention on natural red earth in simulated environmental systems by Meththika Vithanage; Rohana Chandrajith; Athula Bandara; Rohan Weerasooriya (265-272).
Arsenic retention on natural red earth (hereafter NRE) was examined as a function of pH, ionic strength, and initial arsenic loading using both macroscopic and spectroscopic methods. Proton binding sites on NRE were characterized by potentiometric titrations yielding an average pHzpc around 8.5. Both As(III)– and As(V)–NRE surface configurations were postulated by vibration spectroscopy. Spectroscopically, it is shown that arsenite forms monodentate complexes whereas arsenate forms bidendate complexes with NRE. When 4 < pH < 8 and [total arsenic as As(III) or As(V)] = 0.385 μmol/L both arsenite and arsenate exhibit near 100% adsorption for a 10-fold variation of ionic strength that is ascribed to inner-sphere complexation of surface bonding. Arsenite exhibits an apparent bond-switching mechanism from inner-sphere to outer-sphere at excess As(III) loading (total arsenic as As(III) or As(V)] = 38.5 μmol/L. Competitive effect of arsenate for arsenite adsorption sites was observed when [initial As] = 0.385 μmol/L. In dual adsorbate systems the Γ As(III) was reduced over 20%, showing a competition of arsenite for arsenate binding sites (or vice versa). All experimental data were quantified with a 2pK generalized diffused layer model considering two site types for both protons and anions binding using reaction stoichiometries, as follows: FeOH + H+ ⇔ FeOH+ 2, 4.744, FeOH ⇔ FeO− + H+, −9.03, AlOH + H+ ⇔ AlOH+ 2, 7.229, AlOH ⇔ AlO− + H+, −9.316, FeOH(s) + H3AsO3(aq) ⇔ FeHAsO2− 3(s) + H2O, 6.798, AlOH(s) + H3AsO3(aq) ⇔ AlHAsO2− 3(s) + H2O, 5.319, FeOH(s) + H2AsO− 4(aq) ⇔ FeHAsO2− 4(s) + H2O, 11.88, AlOH(s) + H2AsO− 4(aq) ⇔ AlHAsO2− 4(s) + H2O, 9.061.
Keywords: Surface complexation; Generalized diffuse layer; Arsenite; Arsenate; Competitive adsorption; Natural red earth;
Energy of adsorption interaction and surface coverage from polymer of various molecular structures by Yuri Lipatov; Valentine Chornaya; Tamara Todosijchuk; Galina Menzheres (273-280).
Adsorption from solutions of mixtures of polymers which considerably differ by the parameter of thermodynamics flexibility (σ) has been studied at various components ratio. Initial and equilibrium concentrations of solutions were determined, surface coverage (θ) and energy of adsorption interaction (Q, kJ/mol of segments) were estimated by means of IR spectroscopy. The objects of investigation were: cis-1,4-polybutadiene rubber (PB) and cellulose triacetate (CTA). Aerosil (fumed silica) was used as an adsorbent. Analysis of the experimental data testifies that polymer polarity and its affinity to the surface have the decisive influence on the adsorption. Polar stiff chain CTA has greater affinity to the surface of adsorbent and correspondingly has greater adsorption activity as compared with flexible, but nonpolar PB. The values of energy of adsorption interaction and surface coverage obtained under the adsorption from polymer systems first of all depend on whether the stiff chain polar component or flexible chain nonpolar component prevails in the system. Increase of concentration of the nonpolar PB flexible chain in the system results in diminishing of summary energy of adsorption interaction, but its great flexibility at the same components ratio provides the maximal values of surface coverage. The greater values of the surface coverage under the adsorption from the solutions of polymer mixtures in comparison with the individual solutions are explained by the simultaneous adsorption of both components for all concentration intervals.Adsorption from solutions of mixtures of cis-1,4-polybutadiene rubber (PB) and cellulose triacetate (CTA) has been studied. Figure shows dependence of the adsorption interaction energy (Q) on the surface coverage ( θ ) .
Keywords: Adsorption; Polymer mixture solutions; Polymer chain flexibility (stiffness); Surface coverage; Energy of adsorption interaction;
Sorption of levulinic acid onto weakly basic anion exchangers: Equilibrium and kinetic studies by Bao-Jian Liu; Qi-Long Ren (281-287).
The equilibrium and dynamics of levulinic acid sorption on two weakly basic anion exchangers, in free base form, in single-component aqueous solutions were investigated. Adsorption isotherms such as Langmuir, Sips, Radke–Prausnitz, and Toth were applied to correlate the experimental data in the temperature range 285 – 315 K . Modeling results showed that the Toth model is the best one to correlate the sorption isotherms. The resulting Toth equations were used with the Clausius–Clapeyron equation to determine the isosteric heat of sorption. The sorption kinetics was experimentally measured via a completely stirred finite-bath batch experiment under different initial concentrations and at varying solution temperatures. The pseudo-second-order kinetic model and the Elovich equation were used to represent the kinetic data and the equation parameter values were also evaluated. The pseudo-second-order equation cannot simulate the experimental kinetic data, while the Elovich equation fitted the sorption dynamic data very well under all the operating conditions studied. Finally, the apparent activation energy of sorption was also determined.
Keywords: Levulinic acid; Anion exchanger; Sorption equilibrium; Batch kinetics; Toth; Elovich; Pseudo-second order; Isosteric heat;
Influence of temperature and alkyl chain length on phase behavior in Langmuir monolayers of some oxyethylenated nonionic surfactants by Md. Nazrul Islam; Teiji Kato (288-294).
We study the surface phase behavior in Langmuir monolayers of a series of nonionic surfactants of the general formula CnE1 with n = 14 , 16, and 18 by film balance and Brewster angle microscopy (BAM) over a wide range of temperatures. A cusp point followed by a pronounced plateau region in the pressure–area ( π – A ) isotherms indicates a first-order phase transition in the coexisting state between a lower density liquid expanded (LE) phase and a higher density liquid condensed (LC) phase at the air–water interface. The formation of bright two-dimensional (2D) LC domains in a dark background visualized by BAM further confirms this observation. In addition to the cusp point at the onset of the LE–LC coexistence state, another cusp point followed by a small plateau is observed for the C14E1 and C18E1 monolayers, indicating a second phase transition between two condensed phases of different compressibility and tilt orientation of the molecules. This unusual two-step phase transition is explained by the Ostwald step rule. The C16E1 and C18E1 monolayers show a kink in their respective isotherms, after which the surface pressure increases steeply with only a little decrease in the molecular area, suggesting that the molecules undergo a transition from a tilted to an almost vertical orientation with respect to the water surface. The thermodynamic parameters for the condensation of the molecules in the LE–LC coexistence state were calculated by employing the 2D Clapeyron equation. The temperature coefficient of the critical surface pressure d π c / d T values shows a decreasing trend from C14E1 to C18E1, suggesting that the condensation process becomes less and less prone to thermal perturbation as the chain length increases. For all the amphiphiles, the ΔH values are found to be negative, suggesting an exothermic nature of condensation. The negative ΔS values obtained from the relation Δ H / T probably come from the restriction on the rotational and translational motion of the molecules constrained in a confined area in the LE–LC transition region.
Keywords: Nonionic surfactants; Langmuir monolayers; Brewster angle microscopy; Phase transition; Condensed-phase domains;
Nonfibrous β-structured aggregation of an Aβ model peptide (Ad-2α) on GM1/DPPC mixed monolayer surfaces by Takayoshi Kawasaki; Kentaro Asaoka; Hisakazu Mihara; Yoshio Okahata (295-303).
Adsorption and aggregation of transformed peptides and proteins onto the cell membrane surface is commonly associated with forms of amyloidosis such as Alzheimer's disease and prion disease. To address dynamic features of these pathological phenomena molecularly, the in situ Ad-2α model peptide deposition on glycolipid-containing monolayers was studied by using a 9 MHz quartz-crystal microbalance (QCM). The Ad-2α peptide has two amphiphilic α-helix segments, each modified with a 1-adamantanecarbonyl group at the N-terminal as a hydrophobic defect. The peptide folds in a 2α-helix structure in the bulk solution. In the presence of mixed monolayers of glycolipids (GM1, asialo-GM1, GM3, or LacCer) and/or dipalmitoyl phosphatidylcholine (DPPC) laminated on the QCM plate, the peptide deposition and the conformational change to β-structure on the monolayers were accelerated. The adsorption kinetics and the amount of Ad-2α were dependent on the sort and contents of the glycolipid in the DPPC matrix. Although the Ad-2α peptide adsorbs onto most of the glycolipid membranes as monolayer coverage, it adsorbed largely onto the GM1/DPPC (30/70 mol%) mixed monolayer with characteristic kinetic behaviors. The accumulation of β-structured nonfibrous aggregations was confirmed by AFM and fluorescence microscopy with Thioflavin T (ThT).
Keywords: Amyloid peptide; Quartz-crystal microbalance; Ganglioside mixed monolayers; Thioflavin T; AFM;
Selective adsorption and reactivity of dipeptide stereoisomers in clay mineral suspension by Juraj Bujdák; Milan Remko; Bernd M. Rode (304-308).
Preferential adsorption of dipeptide diastereomers (dialanine, Val-Ala) on clay mineral surfaces was observed. Significantly higher adsorption of dipeptides composed from only one type of enantiomer of amino acid units in comparison to those containing both L- and D-type of amino acid units in their molecules, was experimentally proven. This selectivity was explained in terms of different hydrophobic properties of diastereomers, which are probably controlled by intramolecular interactions between nonpolar and polar parts of dipeptide molecules affected by their stereochemistry. A significantly higher reactivity of stereoisomers composed from the same type of amino acid enantiomers to form amide bonds was proven as well. Theoretical study could distinguish different properties of the diastereomers. The results of the calculations indicate possible effects of molecular stability in the stereoselectivity during the adsorption and reactions of Ala2 diastereomers.This paper describes the stereoselectivity in adsorption and subsequent reactions of dipeptide stereoisomers forming amide bonds in montmorillonite suspension. Significantly higher adsorption and reactivity of dipeptides composed of only one type of enantiomer of amino acids (L–L or D–D) was proven.
Keywords: Adsorption; Diastereomers; Dipeptides; Clay minerals; Chemical evolution;
Microstructure formation in dip-coated particulate films by L. Günther; W. Peukert; G. Goerigk; N. Dingenouts (309-320).
The microstructure-dependence of dip-coated particulate thin films on the stability of an aqueous silica sol used as coating bath is studied. Different stability conditions are adjusted in the sol by changing electrolyte concentration and pH value. Care was taken to avoid pronounced aggregation of the particles before the coating process. The characterization of the stability behavior gives clear evidence of a non-DLVO contribution at low pH values that is attributed to hydration forces. Structural evolution of the particulate network during film formation is studied using a dialysis accumulation procedure. The viscosity of the accumulated sol is measured as a function of shear rate and related to the drying characteristic of the coating process. Atomic force microscopy (AFM), small-angle X-ray scattering (SAXS) and N2 sorption are used to obtain information on the surface and volume structure of the dip-coated films. The structure of coatings is found to distinctly vary with stability parameters. This is attributed to changing interactions during the first drying stage. Finally, the influence of coating structures on the light transmission properties is determined. A comparison between the extinction of the uncoated and the coated substrate revealed a difference of up to ± 50 % in dependence on the microstructure.The influence of particle interactions on both structure formation and dry film structure of dip-coated particulate silica films has been studied. The relevance of particle interactions for tailoring film microstructure and thereby macroscopic coating properties is demonstrated.
Keywords: Dip coating; Particles; Colloidal stability; Film structure; Pore size distribution; Rheology; Small-angle scattering;
Molecular modeling study of the aggregation behavior of nickel(II), cobalt(II), lead(II) and zinc(II) bis(2-ethylhexyl) phosphate complexes by Taleb H. Ibrahim; Ronald D. Neuman (321-327).
The physiochemical nature of the metal–extractant species in organic solvent has been a matter of debate over liquid–liquid extraction of transition metals by bis(2-ethylhexyl) phosphate. The aggregation behavior of nickel(II), cobalt(II), lead(II), and zinc(II) bis(2-ethylhexyl) phosphate have been investigated using molecular modeling. The recently confirmed "open" water channels rodlike reversed micelles which is in contact with the nonaqueous solvent rather than in an inner core (or "closed" water channel) of the nickel–extractant species by Ibrahim and Neuman appears to be a unique structure for such species. Lead–, cobalt– and zinc–extractant species behave in a different manner. The cobalt–extractant species form rodlike reversed micelles, but does not show the formation of any open water channel. The zinc– and lead–extractant species form ellipsoidal (or deformed spherical) reversed micelles with fewer water molecules located at the core of the micelles which is in accord with the conventional view of reversed micelles. The structural variations of the reversed micelles for the metal extracted species are in accord with the known extraction behavior of such metals when using HDEHP.The "open water-channel" model of Ni(DEHP)2 reversed micelles is a unique structure. Other metal–extractant species form reversed micelles that are in accord with the conventional view of reversed micelles.
Keywords: Reversed micelles; HDEHP; Solvent extraction; Divalent metals; Molecular modeling;
Solvothermal synthesis of hollow ZnS spheres by Zhengshui Hu; Lanying Li; Xiaodong Zhou; Xun Fu; Guohua Gu (328-333).
Mono-dispersed semiconductor ZnS hollow spheres with the diameter of 300–500 nm and the shell thickness of about 100–150 nm have been synthesized successfully by solvothermal method from ethanol solution in the presence of a special surfactant—quaternary ammonium salt of 2-undecyl-1-dithioureido-ethyl-imidazoline (SUDEI) made in our lab. The mono-dispersed ZnS hollow spheres are characterized by XRD, size distribution investment, UV–vis, TEM, and SEM, respectively. The UV–vis measurement indicates that there is a broad absorption at 210–280 nm, which is likely to be caused by "hollow-effect." A growth mechanism of ZnS hollow spheres has also been put forward and discussed.
Keywords: ZnS hollow spheres; Hollow-effect; Solvothermal;
Size tunable synthesis of cysteine-capped CdS nanoparticles by γ-irradiation by Anindita Chatterjee; Amiya Priyam; Satyen K. Das; Abhijit Saha (334-342).
Highly water soluble and biocompatible L-cysteine-capped CdS nanoparticles having narrow size distribution were synthesized for the first time by γ-irradiation technique without using any additional stabilizer. FTIR study shows that CdS nanoparticles are capped through mercapto-group of cysteine amino acid while its free amino and carboxylate groups make it amenable to bio-conjugation. Size and luminescence of the nanoparticles can be well controlled by varying the parameters like radiation dose, pH and concentration of cysteine. The observed results suggest that pH 7 can be optimum for the synthesis of L-cysteine-capped CdS nanoparticles. CdS nanoparticles synthesized with molar ratio of Cd2+:cysteine, 1:60 at pH 7 were found to be most luminescent. All nanoparticles formed lie in the size quantization regime and exhibit good crystallinity. Remarkable improvement in stability and luminescence was achieved on changing pH of as-prepared nanoparticles from 7 to 11.
Keywords: CdS nanoparticles; Cysteine; γ-Irradiation; Luminescence; Stability;
Lines of dense nanoparticle colloidal suspensions evaporating on a flat surface: Formation of non-uniform dried deposits by A.L. Yarin; J.B. Szczech; C.M. Megaridis; J. Zhang; D.R. Gamota (343-354).
Line evaporation of dense nanoparticle suspensions is studied theoretically and experimentally. The 2-D lines are drawn by a pen-like nozzle continuously dispensing a commercially available concentrated organic suspension (50 wt%; 4.3 vol%) of 5 nm gold nanoparticles in toluene solvent. Such particle-containing lines show promise for industrial applications where circuits are inkjet-printed and heat-treated to dry off the organic solvent and sinter the nanoparticles, thus producing a continuous electrically conducting path. The employed nanosuspension displays spontaneous thickening upon contact with a solid surface in the ambient atmosphere, and thus does not dry according to the well-established coffee-stain forming mechanism applicable to dilute particle suspensions. In the present work, model lines (∼1 mm width) are studied to elucidate the drying peculiarities of such nanoparticle slurries. These scaled-up lines allow detailed spatial measurements of their topography throughout their prolonged evaporation period, and make possible direct comparisons between experiment and theory. The results show the particle deposits formed by evaporative drying of these lines to be of non-uniform thickness with a dent in the middle of the lateral cross-section. Formation of this practically undesirable landscape is attributed to the highly non-uniform evaporative character of sessile or pendent liquid lines, which results in a non-uniform consolidation of the porous phase formed upon contact with the solid surface. The formulated description of the shape changing process, as done in the framework of the consolidation theory, yields predicted deposit speck shapes that compare favorably with the temporally resolved experimental data.
Keywords: Nanoparticle colloidal suspension; Evaporating slurry line; Drying; Film deposit;
Spherical iron/silica nanocomposites from core-shell particles by Manuel Ocaña; Manuel Andrés-Vergés; Raúl Pozas; Carlos J. Serna (355-361).
A simple procedure to coat silica spheres with smooth layers of iron compounds is reported. It is based on the forced hydrolysis (60–85 °C) of iron(III) acetylacetonate solutions containing the silica cores and sodium dodecylsulfate (SDS). The role that the iron(III) precursor and SDS play in the formation of uniform coatings is discussed. The thermal evolution of the composites up to the crystallization of the initially amorphous coating was also studied. Finally, the core-shell particles, as prepared, were thermally reduced under hydrogen atmosphere to produce magnetic composites whose magnetic properties were also evaluated as a function of the reduction temperature.Magnetic iron/silica nanocomposites were prepared from core-shell spherical particles by thermal reduction with hydrogen and their magnetic properties were modulated by varying the reduction temperature.
Keywords: Core-shell; Coating; Iron; Iron oxide; Silica; Magnetic properties;
Surface modification of mechanochemically activated kaolinites by selective leaching by Éva Makó; Zsuzsa Senkár; János Kristóf; Veronika Vágvölgyi (362-370).
Low- and high-defect kaolinites mechanochemically activated for different periods of time have been treated with sulfuric acid solution. These modified materials were analyzed using a combination of X-ray diffraction, thermogravimetry, chemical analysis, diffuse reflectance Fourier transform infrared spectroscopy, as well as specific surface area and pore size distribution measurements. In addition to the mechanochemically amorphized part, the disordered and the adequately distorted phases also reacted with sulfuric acid. The specific surface areas of the leached samples of the partially or the completely amorphized materials were found to be greater than those of the thermally amorphized ones. The acid treatment results in a greater total pore volume for the partially amorphized materials than for the totally amorphized mineral. The partially amorphized high-defect kaolinite was proved to be more soluble than the low-defect kaolinite under similar conditions.Instead of calcination (H), it is the mechanical activation of Zettlitz (Z) and Szegi (Sz) kaolins that combined with acid treatment (L) proved to be effective to produce porous silica with high total pore volume.
Keywords: Dry grinding; Kaolinite; Mechanochemical activation; Selective leaching;
Preparation of platinum nanoparticles in salt-induced micelles of dumbbell-shaped ABA copolymer by Wuu-Jyh Liang; Chia-Hui Lien; Ping-Lin Kuo (371-375).
The interaction of a water-soluble ABA type of dumbbell-shaped polyethyleniminated copolymers (D400(EI)8) with H2PtCl6 in aqueous medium is studied by means of UV–visible absorption spectra, dynamic light scattering (DLS) measurements, and transmission electron microscopy (TEM). From TEM images of the stained polymer, it is evident that the spherical and well-structured polymer micelles are formed by the introduction of H2PtCl6, and totally nonstructured micelles are formed from D400(EI)8 itself. These findings coincide with the results obtained from DLS measurements, where the narrowly distributed polymer aggregates are remarkably observed. Moreover, it is directly evidenced from TEM that the reduced Pt(0) nanoparticles are embedded in the polyethylenimine (PEI) block at the exterior of micelles, whereas the polyoxypropylene (PPO) block is surrounded by the PEI block. Additionally, the resulting Pt(0) colloids are very stable for at least 4 months.
Keywords: Polyethyleniminated copolymer; Salt-induced micelles; Platinum nanoparticles;
Anoxic dissolution of troilite in acidic media by Paul Chiriţă; Michaël Descostes (376-384).
The anoxic dissolution of troilite (FeS) in acidic medium has been investigated at 50 °C using batch dissolution experiments. Two different progress variables were followed during solid dissolution, i.e., the amounts of dissolved iron ( n Fe ) and formed hydrogen sulfide ( n H 2 S ). The experimental studies performed at hydrogen ion concentrations ([H+]) ranging from 0.04 to 0.2 mol L−1 showed that anoxic dissolution of troilite is dependent on [H+]. The cumulative release of both Fe and H2S could be described by a diffusion-like rate law, with rate constants for Fe ( k Fe p ) always greater than for H2S ( k H 2 S p ). The surplus of dissolved iron over formed hydrogen sulfide was quantified by the n Fe : n H 2 S ratio, and ranged from 1.21 to 1.46, higher than the specific n Fe : n H 2 S ratio of troilite bulk, i.e., 1. Rate constants are linearly related to the pH with a slope of 0.66 ± 0.23 ( n Fe ) or 0.63 ± 0.13 ( n H 2 S ). The obtained results suggest that troilite anoxic dissolution is a process controlled by the diffusion of the reaction products across an obstructive layer, sulfur-rich layer (SRL), having a thickness that increases during reaction progress. The accumulation of H2S between the surface and the SRL, eventually leads to the mechanical destruction of this outer layer, a process that results an increased flux of reaction products.The integral form of rate law that can describe within experimental uncertainties the troilite anoxic dissolution is: n Fe = 0.85 ( ± 0.50 ) [ H + ] 0.66 ( ± 0.23 ) t 0.5 for dissolved iron and n H 2 S = 0.58 ( ± 0.21 ) [ H + ] 0.63 ( ± 0.13 ) t 0.5 for released H2S .
Keywords: Troilite; Hydrogen sulfide; Dissolved iron; Anoxic dissolution; Reaction mechanism; Diffusion;
Synthesis and study of molecular interactions between phosphatidyl choline and two laminin derived peptides hydrophobically modified by M.A. Alsina; A. Ortiz; D. Polo; F. Comelles; F. Reig (385-390).
Two peptides based on the active SIKVAV sequence were synthesized and hydrophobically modified through attachment of a myristoyl residue to the amino terminal group. A comparative study was carried out on the physicochemical properties of both parent and hydrophobically modified structures. Properties studied were hydrophobicity, surface activity, spreadability on aqueous surfaces, penetration in lipid monolayers, aggregation and haemolytic activity. Results obtained indicate that myristoyl containing peptides form micelles at 10−6 M concentration, whereas parent peptides start to aggregate at 10−5 M. All of them are able to spread on aqueous surfaces forming stable monolayers. Concerning their haemolytic activity only one of the sequences promotes a partial lysis of erythrocytes after 30 min incubation at 37 °C and 10−5 M concentration in the media.
Keywords: Peptide synthesis; Monomolecular layers; Laminin; Fluorescence; Surface activity; Phospholipids;
Compressibility, the measurement of surface tension, and particle size in molecular or nuclear matter by Marc Dixmier (391-399).
It is shown that the interface shrinkage resulting from the capillary pressure difference between both sides of a curved interface is the product of a "standard shrinkage"κγ (κ is the isothermal compressibility, γ the interfacial tension) by a dimensionless factor that depends only on the shape of the sample of matter under study. The behaviour of the standard shrinkage in the critical domain shows that it cannot be a measure of the thickness of the liquid–vapour interface in that domain. The standard shrinkage of classical liquids somewhat above triple point is usually near to 0.048 v c 1 / 3 ( v c is the critical molecular volume); exceptions to this rule are discussed. The variation of the standard shrinkage along the liquid–vapour coexistence curves of water and argon is presented; the effect of the interface shrinkage on the measured surface tension of liquids can become important within about 15% of the critical temperature. The standard shrinkage of solids is less than that of the corresponding liquids, and is of no consequence when measuring the surface tension of solids. The standard shrinkage of the nuclear fluid is 0.23 fm = 0.09 v c 1 / 3 . The saturation density of infinite nuclear matter is about 9% less than its value in atomic nuclei, and a term proportional to A 1 / 3 (A is the mass number) must be added to the nuclear binding energy formula.
Keywords: Surface energy; Thermodynamics of surfaces and interfaces; Critical exponents; Nuclear matter; Nuclear binding energies and masses;
Wetting properties at the surface of iota-carrageenan-based edible films by Thomas Karbowiak; Frédéric Debeaufort; Dominique Champion; Andrée Voilley (400-410).
Surface properties of edible films composed of a polymeric matrix of carrageenan in association with hydrophobic material were studied by contact angle measurements. The use of this technique not only in a static mode but also in a dynamic way enables investigation of surface hydrophobicity as well as surface wettability. The absorption flux inside the material can be estimated from the wetting kinetic, which can be very useful to quickly compare water barrier efficiency of the tested films. Comparison of carrageenan films with films containing known amounts of additives enables understanding and correlation of changes of the surface properties with the nature of used additives (glycerol used as a plasticizer, glycerol monostearate used as a surfactant, and fat) and their influence on the orientation of polymer chains at the surface during film formation. Very different responses were observed from one surface of the film (film-casting–support interface) to the other (film–air interface), which could be also attributed to the influence of the support on the polymer and to macromolecular orientation during drying after casting.
Keywords: Edible film; Carrageenan; Contact angle; Water; Absorption; Surface;
Adsorption at the liquid/liquid interface in mixed systems with hydrophobic extractants and modifiers by Katarzyna Staszak; Krystyna Prochaska (411-417).
The dynamic interfacial tension for binary mixtures of hydrophobic metal ion extractants and a modifier were measured by using the drop volume technique. Four types of equimolar mixtures were considered: two chelating extractants: 2-hydroxy-5-nonylacetophenone oxime (HNAF) and β-diketone (1-phenyldecan-1,3-dion), two solvating extractants: trioctylphosphine oxide (TOPO) and tributyl phosphate (TBP), chelating and solvating extractants TOPO and β-diketone, and the chelating extractant HNAF and the modifier (decanol). With the aid of the Ward and Torday equation the values of the diffusion coefficients of individual compounds and their equimolar mixtures were estimated. It was found that in the case of two types of investigated mixtures, i.e., HNAF + β-diketone and HNAF + decanol the compound HNAF that was dominant in the mixed adsorbed monolayer and the more interfacially active also determined the kinetics of adsorption in mixed systems. In contrary to the mixture of two chelating reagents, in the case of a mixture of two solvating extractants the mixed system behaves like the less active, though dominant at the interface, reagent TBP. The same effect was observed in both of the considered diluents (toluene and octane).
Keywords: Liquid/liquid interface; Dynamic interfacial tension; Solvent extraction; Hydrophobic metal ion extractants; Mixed adsorbed monolayer; Diffusion coefficient;
Determining the contact angle between liquids and cylindrical surfaces by N. Dumitrascu; C. Borcia (418-422).
One of the simplest methods of measuring the quantities for estimating the adhesion properties of materials (i.e., the adhesion work, the surface energy, and the interfacial tension between certain liquids and a surface) requires the determination of the contact angle between the liquid and the surface. In the case of plane surfaces the determination of the drop dimensions makes it possible to calculate the contact angle by the sessile drop method, but in the case of cylindrical surfaces (such as the monofilaments), several methods were developed to improve the accuracy of the contact angle measurements. This paper presents a comprehensive method for precise evaluation of the contact angle between liquid drops and monofilaments by establishing a differential equation describing the drop contour. This equation makes it possible to accurately compute the contact angle using the dimensions of the drop. A comparison of the values of the contact angle calculated by our method and those obtained by other approaches is made. We applied our method in the case of polyamide-6 monofilaments treated using dielectric barrier discharge, knowing their medical applications in surgical sutures.This paper presents a method to evaluate the contact angle between liquid drops and monofilaments, by establishing a differential equation which allows to compute the contact angle using the dimensions of the drop.
Keywords: Adhesion work; Biocompatibility; Contact angle measurement; Cylindrical surfaces; Liquid–solid interface;
Investigations on foamability of surface-chemically pure aqueous solutions of functionalized alkylaldonamides by Dorota Piłakowska-Pietras; Klaus Lunkenheimer; Andrzej Piasecki (423-428).
The foamability of the aqueous solutions of functionalized, surface-chemically pure surfactants of the nonionic saccharide-type: N , N -di-n-alkylaldonamides, N-alkyl-N-(2-hydroxyethyl)aldonamides, and N-cycloalkylaldonamides, derivatives of D-glucono-1,5-lactone and/or D-glucoheptono-1,4-lactone, were investigated. The approach of Lunkenheimer and Małysa for the characterization of the foamability and foam stability of these surfactant solutions was applied for these investigations. Using standard parameters related to the different physical stages of the foaming process, foam stability can be described in a simple and easy manner. In general, the investigated alkylaldonamides form foams of medium stability. However, for some homologues a transition from unstable to stable foam systems is observed with increasing concentration. Modifications of the molecular structure of the alkylaldonamides are distinctly reflected in their foam properties. This fact concerns not only changes of the hydrophobic moiety and its functionalization but also slight variations of the saccharide residue. Each homologous series reveals an exceptional foam behavior. In the case of the N , N -di-n-alkylaldonamides the increase of the n-alkyl chain length is accompanied by an increase of the foam stability. The aqueous solutions of the N-alkyl-N-(2-hydroxyethyl)aldonamides reveal most favorable foaming properties for homologues with average alkyl chain lengths. Moreover, it was found that the occurrence of a phase transition in the adsorption layers of the N-cyclooctylgluconamides previously observed by surface tension and surface potential measurements is also remarkably reflected in their foam stability.
Keywords: Sugar surfactants; Aldonamides; Foamability;
Interfacial behavior of DEHEHP and the kinetics of cerium(IV) extraction in nitrate media by Junmei Zhao; Xiaobo Sun; Wei Li; Shulan Meng; Deqian Li (429-435).
The effects of diluents, temperature, acidity, and ionic strength of the aqueous phase on the interfacial properties of DEHEHP have been extensively investigated using the Du Nouy ring method. In addition, the effect of cerium(IV) concentration loaded in the organic phase on the interfacial tension has also been studied. With the increase of DEHEHP concentration, the value of interfacial tension (γ) decreases in the studied system, which shows that DEHEHP has interfacial activity as a kind of surfactant. The surface excess at the saturated interface ( Γ max ) and the minimum bulk concentration of the extractant necessary to saturate the interface ( C min ) under the different conditions are calculated according to two adsorption equations such as the Gibbs and Szyszkowski functions to be presented in comprehensive tables and figures. The relationship between the interfacial activity of DEHEHP and cerium(IV) extraction kinetics by DEHEHP has been discussed by considering different factors such as the effects of diluents and temperature. However, the interfacial activity parameter of extractant only is a qualitative parameter, but cannot provide strong enough evidence to quantitatively explain the relationship between extraction kinetics and interfacial properties of an extractant.
Keywords: DEHEHP; Interfacial behavior; Cerium(IV); Extraction; Kinetics; HNO3;
Force balance conditions for droplet formation in cross-flow membrane emulsifications by G. De Luca; E. Drioli (436-448).
The membrane emulsification process is becoming of growing interest in many industrial fields. For monitoring the influence of process and membrane parameters on the droplet formation, quantitative information on the droplet detachment, during this process, is important. Until now, droplet formation has theoretically been described using computational fluid dynamics and global force equations. Unlike computational fluid dynamics methods, the global force models are less accurate but easier to handle and instructive. On this basis, in the present paper we present new force balance equations to describe droplet detachment during cross-flow membrane emulsification. In a first approximation, the droplet is supposed to grow leaning on the pore border as long as a force balance exists along the contact line located on the membrane surface. During this phase the base of the droplet, still stuck on the pore border, begins to bend on the membrane surface until its final detachment. Using force balance equations made along the contact lines, we obtain the minimum and maximum sizes that a droplet could have during cross-flow membrane emulsification. This approach is tested with different continuous phase velocities, membrane pore sizes and interfacial tensions. The results are compared to various experimental data, reported in literature. In particular, based on the experimentally found linear correlation between droplet and pore sizes, we show how the proposed balance equations can be used to obtain a satisfactory evaluation of the slopes of this linear correlation and how these force balances could be used to obtain an estimation of the interfacial tensions during the droplet formation.A new force balance, using advanced and receding contact angles, is proposed to describe the droplet detachment during a cross-flow membrane emulsification. This force balance evaluates the droplet deformations along its contact line due to the continuous phase crow-flow.
Keywords: Cross-flow membrane emulsification; Force balance; Contact lines; Advancing and receding contact angles; Mean droplet sizes; Interfacial tensions; Droplet formation mechanisms;
Interactions in binary mixed systems involving a sugar-based surfactant and different n-alkyltrimethylammonium bromides by J.M. Hierrezuelo; J. Aguiar; C. Carnero Ruiz (449-457).
In this paper, mixtures of sugar-based decanoyl-N-methylglucamide with three different n-alkyltrimethylammonium bromides ( n = 12 (DTAB), 14 (TTAB), and 16 (CTAB)) have been studied using conductance and fluorescence spectroscopic techniques. The critical micelle concentration values of pure and mixed systems were determined by both the conductance and the pyrene 1:3 ratio methods. The experimental results were interpreted using thermodynamic mixing approaches based on the pseudophase separation model. These analyses allowed us to determine the interaction parameters and the composition of the mixed micelles through the whole composition range. Since all the ionic surfactants used in this study have the same headgroup, the differences observed between the three mixed systems were attributed to the lengths of their hydrocarbon chains. It was established that, besides interactions of electrostatic character, additional short-range interactions must be considered. By using the static quenching method, the mean micellar aggregation numbers of mixed micelles were obtained. In the cases of the mixed systems with DTAB and TTAB it was observed that the aggregation number is initially reduced with the participation of the ionic component, remaining almost constant and close to the aggregation number of the pure ionic micelle. However, in the systems involving CTAB it is observed that the size of micelles initially increases and then decreases slightly for mixtures with a high content of the ionic component. The hydrophobic index pyrene 1:3 ratio was used to examine possible changes in the micellar micropolarity; however, no definitive conclusions could be derived from these experiments. In order to study the evolution of the local viscosity of the mixed micelles upon addition of the ionic surfactant, fluorescence polarization measurements were carried out with two different probes, fluorescein and coumarin 6. It was found that the participation of the ionic component in the mixed micelle induces the formation of less ordered structure than that of pure nonionic micelles. An attempt was made to correlate these effects with the interaction parameters obtained from the theoretical mixing model and, consequently, with the alkyl chain length of the ionic components.This report describes an investigation on the mixed micellization process between the nonionic surfactant decanoyl-N-methylglucamide (MEGA-10) with three different n-alkyltrimethylammonium bromides ( n = 12 (DTAB), 14 (TTAB), and 16 (CTAB)).
Keywords: Mixed micelles; MEGA-10; n-Alkyltrimethylammonium bromides;
The critical micelle concentration of tetraethylammonium perfluorooctylsulfonate in water by José L. López-Fontán; Alfredo González-Pérez; Julian Costa; Juan M. Ruso; Gerardo Prieto; Pablo C. Schulz; Félix Sarmiento (458-465).
The aggregation characteristics of tetraethylammonium perfluorooctylsulfonate in water were studied by several techniques: conductivity, pH, ion-selective electrodes, and surface tension. It was concluded that the aggregation process is gradual and starts with the formation of oligomers such as ion pairs that grow to give spherical micelles, which become wormlike with increasing concentration. Because of the size and hydrophobicity of the counterion, micelles quickly increase in ionization degree up to about 0.5. Differences among different critical micelle concentration values in the literature are explained on the basis of the gradual formation of micelles.This work reports the Krafft point of tetraethylammonium perfluorooctylsulfonate, and the dependence on temperature of the critical micelle concentration, the micellar ionization degree and Gibbs free energy, enthalpy and entropy of micellization, the apparent molar partial volume, thermal expansion coefficient, and the adiabatic compressibility factor of both micellized and unmicellized surfactant in water. Results are interpreted on the basis of dehydration of surfactant on micellization and on the temperature increase.
Keywords: Tetraethylammonium perfluorooctylsulfonate; Critical micelle concentration; Premicelles; Perfluorinated surfactants; Air/solution interface;
Flow properties of freshly prepared ettringite suspensions in water at 25 °C by Camelia M. Vladu; Christopher Hall; Geoffrey C. Maitland (466-472).
The rheology of a complex, heterogeneous mineral colloid was rationalised using models devised for model rod systems. Mixing a calcium hydroxide slurry with an aluminium sulphate solution produces a suspension of rod-shaped ettringite particles. Ettringite rod suspensions exhibit non-Newtonian flow behaviour, which depends on the shape of the particles, their size distribution, concentration and surface properties as well as the suspension medium characteristics. We have measured the shear viscosity of suspensions of ettringite rods with a median aspect ratio, r i ∼ 8, at 25 °C as a function of particle volume fraction, ϕ, in the range 0.0001–0.08. It was found that the viscosity of the suspensions increased with ϕ, and showed a marked change of slope at ϕ ∼ 0.01 , which we identified as the minimum overlap concentration ϕ * . Above ϕ * , the system is in the semi-dilute regime. At ϕ > ϕ * , when Pe rot > 1 , hydrodynamic interactions between rods become increasingly significant, and we observe shear-thinning behaviour. The high effective hydrodynamic volume of rotating rods, resulting in much lower values of the maximum packing fraction, ϕ c , than for spheres, dominates the rheological behaviour of ettringite suspensions.The ettringite particles were well-characterized by electron microscopy so that the effect of shape and size on the shear rheology was successfully studied.
Keywords: Rheology; Morphology; Ettringite;
Streaming potential across cation-exchange membranes in methanol–water electrolyte solutions by V.M. Barragán; C. Ruiz-Bauzá; J.L. Imaña (473-481).
Streaming potential measurements across charged membranes separating two equal solutions have been carried out. Two cation-exchange membranes with different cross-linked and swelling properties (Ionics and Nafion membranes) and methanol–water electrolyte solutions of KCl have been used in the experiments. The obtained results show that the streaming potential is higher for the Ionics membrane and that the values depend on the methanol content of the solutions. A different behavior is found in the dependence of the streaming potential on the methanol percentage for each membrane. The study of the relaxation times in the decay of electrokinetic steady states of streaming potential has been carried out from the time dependence of the streaming potential when the pressure difference through the membrane is suppressed. The results show the existence of two different parts or partial relaxations, mechanical and electric. A different behavior of the mechanical relaxation time with the methanol percentage has been found for the two membranes, but any significant difference between their electric relaxation times. These differences have been explained in terms of the different degree of swelling of the membranes used.The pressure coefficient of two cation-exchange membranes with different cross-linked and swelling properties (Nafion and Ionics membranes) has been estimated in methanol–water electrolyte solutions of different methanol percentages.
Keywords: Streaming potential; Cation-exchange membranes; Relaxation times; Methanol–water solutions;
Electrokinetic sample transport in a microchannel with spatial electrical conductivity gradients by Carolyn L. Ren; Dongqing Li (482-491).
Studies of the sample transport in a microchannel with the electrical conductivity gradient are critical to develop techniques for on-chip sample transport control. A numerical model presented in this paper, consisting of the electrical potential equation, full Navier–Stokes equation and species conservation equation, is used to simulate sample transport in a microchannel with the consideration of the conductivity gradient. There are two situations studied here, sample pumping (where sample separation is minimized by employing a high-conductivity buffer in the sample region), and sample stacking (where sample separation is expedited by using a low-conductivity buffer as the sample carrier). The effects of applied electrical potential, sample diffusion coefficient and the ratio of conductivity of the driving buffer over the sample carrying buffer are investigated by using the developed model.Centerline axial concentration profiles for the transport of a two-analyte sample, where the conductivity of the sample-carrying buffer is higher than that of the driving buffer (pumping protocol).
Keywords: Electrokinetics; Conductivity gradient; Microfluidic devices; Sample manipulation; Numerical simulation;
Electrostatic potential and electroosmotic flow in a cylindrical capillary filled with symmetric electrolyte: Analytic solutions in thin double layer approximation by Dimiter N. Petsev; Gabriel P. Lopez (492-498).
The electrostatic potential in a capillary filled with electrolyte is derived by solving the nonlinear Poisson–Boltzmann equation using the method of matched asymptotic expansions. This approach allows obtaining an analytical result for arbitrary high wall potential if the double layer thickness is smaller than the capillary radius. The derived expression for the electrostatic potential is compared to numerical solutions of the Poisson–Boltzmann equation and it is shown that the agreement is excellent for capillaries with radii greater or equal to four times the electrical double layer thickness. The knowledge of the electrostatic potential distribution inside the capillary enables the derivation of the electroosmotic velocity flow profile in an analytical form. The obtained results are applicable to capillaries with radii ranging from nanometers to micrometers depending on the ionic strength of the solution.Analytical expressions for electrostatic potential distribution and electroosmotic flow in cylindrical capillaries are obtained using the method of matched asymptotic expansions. The results are applicable for moderately thin double layers.
Keywords: Charged capillary; Nanofluidics; Microfluidics; Thin double layer; Electrostatic potential; Electroosmotic flow; Matched asymptotic expansions;
Electrorheological behavior of copper phthalocyanine-doped mesoporous TiO2 suspensions by Kai Di; Yihua Zhu; Xiaoling Yang; Chunzhong Li (499-503).
A type of anhydrous electrorheological (ER) material of copper phthalocyanine (CuPC)-doped mesoporous TiO2 was synthesized by in situ micelle-assisted incorporation CuPC during mesoporous TiO2 synthesis. TEM, XRD and the nitrogen adsorption–desorption isotherms demonstrated that the material had mesoporous structure and an anatase framework. The ER behavior of the suspensions of CuPC-doped mesoporous TiO2 in silicone oil with the different volume fractions was investigated under an applied electric field. It is found that the suspensions showed visible electrorheological behavior which were compared with that of pure TiO2. The dopants of CuPC molecules within the mesochannel of TiO2 mesoporous sieve improved the conductivity of the particles and produced a proper conductivity of ∼10−7 S m−1. Dielectric spectra of the ER fluid were measured to examine the peak of ɛ ″ should appear in the frequency range of 102–105 Hz and have a large Δ ɛ ′ in this frequency range. Therefore, the both properties may make a conjunct effect on electrorheological behavior.A new anhydrous ER fluid composed of CuPC-doped mesoporous TiO2 particles and methylic silicone oil has been investigated. When the CuPC/CTAB molar ratio is increasing, the yield stress is obviously increasing.
Keywords: Electrorheological fluid; Mesoporous TiO2; Interfacial polarization; Dielectric property;
Visible light photocatalytic decomposition of 2-naphthol by anodic-biased α-Fe2O3 film by Tetsuro Kawahara; Kei-ichi Yamada; Hiroaki Tada (504-507).
Transparent α-Fe2O3 films with varying film thickness were formed on a SnO2 transparent conducting film-coated glass substrate by metal organic deposition. Under anodic-biased conditions, the α-Fe2O3 film showed a high photocatalytic activity for the decomposition of 2-NAP with visible light irradiation. The α-Fe2O3 is transformed to inactive hydroxide as the reaction proceeds, while the activity of α-Fe2O3 is almost maintained in acetonitrile.Under anodic biased conditions, the α-Fe2O3 film formed on a SnO2 film-coated glass has showed a high photocatalytic activity for the decomposition of 2-naphthol with visible light irradiation.
Keywords: Photoelectrochemistry; Visible-light photocatalyst; α-Fe2O3; Fe(OH)3; Thin film;
Author Index for Volume 294 (508-509).


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Keith Langlois interviewed Joe Dumars recently and Joe told Keith that he would be surprised if there were any moves before the season starts.
August 22, True Blue Pistons: "I would be very surprised if anyone called at this point to offer the type of deal I was open to and had been open to doing," Dumars said. "I don't expect that call. I expect us to go to war, if you will, with the guys we have on this roster we have right now, with the 14 guys we have now."
We talked quite a bit about the tenor of the conversations Dumars has had over the summer with the veteran core. He said none of them lobbied to stay, necessarily, but all of them made it clear to him that their preference was to come back intact and give it a try under Michael Curry. Dumars isn't surprised, but he is pleased that they've all expressed an eagerness to play under Curry even though they know "there's a level of accountability. They know there's a level of responsibility that comes with playing for him. They know there's a level of professionalism and preparation that's going to be in place every single day."
So, since Joe talked to the players and used no "cute language", and his talks with the players was straightforward, then it will be the difference maker for next season. One has to wonder why Mr. Dumars used cute language and wasn't straightforward the last three summers. Maybe the Pistons would have a couple more Titles in their pockets.
In the larger picture, take this away: Dumars and Curry are not at all downcast because they didn't make a big move. In those many and lengthy conversations he's had with his players this summer, Dumars said they've all conveyed the sense that they're taking responsibility for not matching the level of intensity Boston through at them in the conference finals.
"This has been a good summer from my perspective," he said, "because the complacency that I've taken issue with, the lack of urgency that I've taken issue with, has been front and center in a lot of conversations I've had with guys and it's straightforward, no cute language, here's the deal."
You can listen to the first part of the interview here, or read the transcript here.
Also mentioned was the fact that the Lindsey Hunter situation should be resolved soon. If Hunter decides to call it a career, Joe said that he may keep the last roster spot open in case something comes up later. Like a player getting bought out that Joe may think could help the Pistons.


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iWork.com to shutdown July 31
Creative destruction. Apple is at it again and this time the axe is falling on one of the company's few failures. On Sunday, July 1, Cupertino officially closed MobileMe, their third failed attempt to create and deliver online services. Another less than successful service, iWork, will go dark on Tuesday, July 31.
Apple generally doesn't release beta software or services to the public. iWork.com is rarer still because the online document collaboration, storage and sync service never left beta and will ignominiously die that way.
Looking for iWork.com public beta?
With a new way to share iWork documents between your devices using iCloud, the iWork.com public beta service will no longer be available. As of July 31, 2012, you will no longer be able to access your documents on the iWork.com site or view them on the web.
See also: Phil Schiller introduce iWork.com at Macworld San Francisco 2009.
We recommend that you sign in to iWork.com before July 31, 2012, and download all your documents to your computer. For detailed instructions on how to save a copy of your documents on your computer, read this support article at Apple.com.
Yes, iWork.com will be gone a week or two after OS X Mountain Lion ships. As you may know, Apple's new Mac operating system provides seamless online document, photo and data sync and sharing — it (sort of) just works…
Ready to bid iWork.com goodbye?
via Macworld UK
Related posts:
— MobileMe is officially [mostly] closed
— If Google can, why not Apple?
— Why 2012 is already like 2005
— Made with unicorn tears? Nope, Apple uses 'magic dust'
— Because Mac users like to pay more for travel


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College Basketball
Alabama State at Alabama A&M (ESPN2, cable ch. 27) 11 a.m.
Illinois at Ohio State (KFDA, cable ch. 12) noon
Massachusetts at Florida State (FOXSS, cable ch. 33) 4:30 p.m.
North Carolina at Miami (FOXSS, cable ch. 33) 7 p.m.
Women's College Basketball
Connecticut at Texas (ESPN2, cable ch. 27) 2 p.m.
Baylor at Oklahoma (FOXSS, cable ch. 33) 2:30 p.m.
TCU at New Mexico (ESPN2, cable ch. 27) 4 p.m.
Pro Basketball
San Antonio at Indiana (KVII, cable ch. 8) Noon
Detroit at Miami (KVII, cable ch. 8) 2:30 p.m.
Chicago at L.A. Clippers (WGN, cable ch. 10) 9:30 p.m.
Pro Football
Pro Bowl (ESPN, cable ch. 26) 5 p.m.
Auto Racing
Daytona 500 qualifying (KAMR, cable ch. 5) 11 a.m.
Johnnie Walker Classic (GOLF, cable ch. 46) 8 a.m.
Pebble Beach National Pro-Am (KFDA, cable ch. 12) 2 p.m.
Colorado at Detroit (OUTL, cable ch. 57) 4 p.m.
Winter Olympics
Women's Hockey, U.S. vs. Germany (USA, cable ch. 25) noon
Speed skating, cross country skiing (KAMR, cable ch. 5) 2 p.m.
Alpine skiing (KAMR, cable ch. 5) 6 p.m.
Short-track speed skating (KAMR, cable ch. 5) 11:05 p.m.
Pro Bowling
West Virginia Championship (ESPN, cable ch. 25) 11:30 a.m.
College Softball
WT vs. Panhandle State (KWTS, 91.1-FM) 12:30 p.m.
Tonight in Torino (KPUR, 1440-AM) 6 p.m.
Talk Shows
Fantasy Focus (KPUR, 1440-AM) 6 a.m.
ESPN The Magazine (KPUR, 1440-AM) 8 a.m.
ESPN GameDay (KPUR, 1440-AM) 11 a.m.
Times and telecasts provided by TV and radio stations are subject to change. Only live events listed.
© 2016. All Rights Reserved. | Contact Us


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BEDFORD - A trial is set to begin this morning for a traveling preacher accused of raping an 11-year-old girl in a Bedford County hotel room several years ago.
The Rev. Walter Bradshaw, 63, of Lexington, N.C., has awaited trial for nearly two years in Bedford County Prison.
Police said Bradshaw raped a girl, then 11 years old, after her mother dropped the girl off to spend the night with Bradshaw in 2007 or 2008 at the Janey Lynn Motel in Bedford Township.
In April, the girl's mother pleaded no contest to charges that she'd left her daughter with Bradshaw and later encouraged her to lie to the authorities.
The mother, whom the Mirror has not named to protect her daughter's identity, received a two- to-six-year state prison sentence after the plea.
Thomas Crawford, Bradshaw's Pittsburgh-based defense attorney, said the mother's plea won't have any bearing on this week's trial.
Asked what observers can expect in court today, Crawford said only: "We can expect Mr. Bradshaw did not do it."
Bedford County District Attorney Bill Higgins said prosecutors have enough evidence to convict Bradshaw on the 23 charges he faces.
"What this case is," Higgins said, "is a pastor who took advantage of a young child and her mother who failed to protect her."


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Canada Dollar Rises Against Greenback, Reaches High Versus Euro
Canada's dollar rallied to its strongest level in a week against its U.S counterpart, tracking gains in global equities and commodities, amid speculation slowing growth in China will spur more monetary stimulus.
The currency advanced against the majority of its most-traded peers, heading for a weekly rise versus the greenback, before Bank of Canada policy makers meet next week to determine interest rates. The loonie, as the currency is nicknamed, touched the strongest level versus the euro since the shared currency began trading in 1999.
"We like the commodity currencies, medium-term," Stephen Gallo, a foreign-exchange strategist at Credit Agricole SA in London, said in a telephone interview. "If the euro becomes overbought versus these currencies we are definitely a seller on rallies," he said referring to sales of the euro against commodity currencies.
The loonie added 0.5 percent to C$1.0141 per U.S. dollar at 5 p.m. in Toronto, touching the strongest level since July 5. One Canadian dollar buys 98.61 cents. The loonie touched C$1.2378 versus the euro.
The Standard & Poor's 500 Index rose 1.7 percent, while the Thomson Reuters/Jefferies CRB Index of raw materials added 1.3 percent. Gold rose 1.1 percent to $1,589.60 per ounce, and crude oil futures rose 1.1 percent to $87.05 per barrel.
Canada's currency has traded this year as strong as 98 cents per U.S. dollar on April 27 and as weak as C$1.0447 on June 4.
Technical Level
Canada's currency may continue to strengthen against the euro after monthly averages crossed a technical level, according to JPMorgan Chase & Co. The loonie extended below C$1.2451 against the euro yesterday, a two-year low and the long-term support zone since 2000, Niall O'Connor, a New York-based technical analyst at the firm, wrote in a note to clients today.
It may appreciate to as much as C$1.2150 against the euro, he wrote, with C$1.2730 is the next resistance level.
In technical analysis, investors and analysts study charts of trading patterns and prices to forecast changes in a security, commodity, currency or index. Resistance is a level on a chart where sell orders may be clustered.
Government-bonds were little changed, with yields on benchmark 10-year at 1.63 percent. The security reached a record low of 1.615 percent on June 1. The 2.75 percent securities maturing in June 2022 dropped four cents to C$110.15.
Rally Update
Deutsche Bank AG advised investors to avoid shorter-maturity Canadian fixed-income securities after a recent rally in the debt that's been driven by speculation the country's central bank is more influenced by slowing global economic growth than by signs of domestic strength.
The Bank of Canada's next interest-rate announcement July 17 may disappoint investors speculating that policy makers are reconsidering an end to stimulus measures, according to economists led by John Clinkard. Deutsche Bank recommends selling December 2012 bankers' acceptance contracts.
"The bank is going to stay on hold," Matthew Perrier, Toronto-based director of foreign exchange at Bank of Montreal, said in a telephone interview. "The bank is going to be cognizant of the global picture."
The central bank will raise its 1 percent overnight target rate by a quarter-percentage point by the second quarter of 2013, according to the weighted forecast in a Bloomberg survey of 19 economists.
Central Bank
The European Central Bank is prepared to ease monetary policy, including cutting its deposit rate further, if the region's financial crisis worsens, according to a Medley Global Advisors report obtained by Bloomberg News.
China's growth slowed for a sixth quarter to the weakest pace since the global financial crisis, putting pressure on Premier Wen Jiabao to boost stimulus to secure a second-half economic rebound.
Gross domestic product expanded 7.6 percent last quarter from a year earlier, the National Bureau of Statistics said today in Beijing. The pace, a three-year low, compares with an 8.1 percent gain in the previous period and the 7.7 percent median forecast of economists.
The loonie has gained 2.5 percent this year among 10 developed-nation currencies in Bloomberg Correlation Weighted Indexes, with the U.S. dollar adding 1.7 percent.


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MIRAMAR BEACH, Florida -- The Florida Highway Patrol is investigating a Friday night accident involving a drunken driver that injured a state trooper and one other person, Local 15 reported.
Trooper Lester Abreu was conducting a field sobriety test on suspected intoxicated driver Eddy Hardy, 41, just after 11 p.m. on Highway 98 in Miramar Beach. Hardy had been involved in an earlier traffic crash at the same location, according to Local 15.
As Abreu conducted the sobriety test, a Jeep Cherokee, driven by Raul Sivas, 34, hit both the patrol car and Hardy's Ford, causing it to flip. The patrol car was pushed into Abreu and Hardy, injuring both, Local 15 reported.
Abreu was taken to Sacred Heart Hospital in Sandestin where he was treated and released Saturday morning, while Hardy suffered critical injuries and was flown to Sacred Heart Hospital in Pensacola.
Sivas was charged with DUI with serious bodily injury, driving with a suspended license and given a citation for failure to use due care. He was booked into the Walton County Jail, according to Local 15.


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Ok I won't eat Bacon anymore.
Ok I won't eat Bacon anymore.
The Paleo Strongwoman - A site dedicated to strength, and feeding strength.
I wouldn't worry about it. There IS a such thing as UNcured bacon. You can buy that.
Or better yet, just get some pork belly and turn it into your own bacon.
I think we primal-lites do hold bacon in high regard...and perhaps we shouldnt. It IS processed food. Uncured store bought still has celery juice/salts and therefore cured with nitrates (in celery). I think it's best to not go overboard with bacon...that's all!
Check out my blog on nature and nurture!
Actually his major concern is that the bacon is often cured with sugar. I buy Coleman's uncured bacon for this reason. He loves bacon! We all love bacon! Who wouldn't?
You know all those things you wanted to do: You should go do them.
Age 48
height 5'3
SW 215 lbs
CW 180 lbs (whole foods/primal eating)
LW 172 lbs
GW 125ish lbs
It seems like cured meats really don't have that much sugar in them at all, and from what I've read lately it also seems like the nitrate avoidance is a little over the top as well. Excellent article here:
The Nitrate and Nitrite Myth: Another Reason not to Fear Bacon
Actually bacon is held in high regard for a reason. Pork is awesome! In fact it has recently been pronounced THE most nutritious meat by Mat Lalonde. Not that his word is law, but we have been over the breakdown of pork FA profile and other positive attributes in the pork thread. That along with the science showing nitrates and nitrates are more prevalent in veggies and human saliva than bacon.....well all your left with is finding a good source for pastured bacon...make sure they don't add sugar....and enjoy!
Yeah, I've put a lot of bacon back on the shelf after seeing sugar as one of the ingredients, but lately I've been reading the nutrition information and a lot of these brands still have 0 sugar/carbs in them, so evidently the amount of sugar is rather negligible. So I just stick with whichever tastes best, regardless of whether sugar is one of the ingredients, as long as the nutritional values are consistent with minimal sugar.


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Advocates Worry Food Aid Cuts Could Hurt Texas Families
As Congress debates proposed cuts to programs that help feed needy families and school children, some school officials and advocates for low-income families are concerned about how the changes could affect Texans who rely on food stamps and reduced price school lunches.
The Supplemental Nutrition Assistance Program, also known as food stamps, provides food for 3.6 million Texans each year. But some lawmakers argue that the program has grown too large and become too expensive, and they are looking for ways to cut SNAP in the 2012 Farm Bill.
"A lot of Texas families rely on SNAP, especially now ...


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Bill O'Brien knows he has some talented young players to build the Penn State program around, but even he has to stop himself from looking too far into the future because he knows nothing is guaranteed beyond this season.
During his weekly radio show Thursday night, O'Brien talked about two true freshmen, linebacker Nyeem Wartman and cornerback Da'Quan Davis, and said they have bright futures at Penn State.
The coach, without being asked or prompted, abruptly switched course to remind everyone that all the Nittany Lion underclassmen will be free agents once again at season's end because of the NCAA transfer rules.
"Another reality of this is that these guys, after the season, might get recruited again," O'Brien said. "But these kids -- this is a great freshman class -- and I hope people support them and understand they have really bright futures."
The question, once December rolls around, will be whether those futures will be at Penn State, or if a large number of players will decide to transfer.
Host Steve Jones asked O'Brien if the concerns about players potentially leaving plays a role in any potential redshirt decisions.
"I think the No. 1 thing we try to do as a staff is try to take care of the now," O'Brien said. "Do what's best for the football team right now. And we've done that all the way through, regardless of the sanctions or not. ... Sometimes it's best for that player to be thrown in the fire early. Some other guys maybe are not quite ready but have great futures for us."
Defending Roof
O'Brien seems to be aware that his defensive coordinator and good friend, Ted Roof, has been drawing a lot of criticism after Ohio gained 499 yards on PSU.
"I have a ton of confidence in Ted," O'Brien said. "Let's remember now that Ted won a national championship at Auburn."