holngrans wool testt

holngrans kalar wool testt ennum ariyappedunna holngrans wool testt varnna kaazhchayude kuravu kandethaan upayogikkunna varnna kazhcha parisodhanayaanu. 1874ll sweedish physiologist frithioff holngren eee parisodhana avatharippichu. varnnaandhatha kandethunnathinulla aadya vijayakaramaya sramamaayirunnu ithu. vilyam thomson yadhaartha holgren testt lalithamaakki, pinneedu holgren-thomson testt ennu namakaranam cheythu.
charithram.
1874ll sweedish physiologist alaric frithioff holngren (1831-1897) avatharippicha oru varnadarshana parisodhana reethiyaanu holngrens kalar wool testt. rettinayude prakaashathodulla vaidyutha prathikaranathekkurichu holngren padichu.
1876ll sweedenil nadanna lagarlunda reyil apakadathetthudarnnu holngrente parisodhana shradha nedi. traininte enchineeyar (apakadatthil marichavar) varnnaandhathayullavanenna samshayichu, holngren upsala gabol lainile 266 jeevanakkaare parisodhikkaan theerumaanichu, avaril pathimoonnu perr varnnaandhathayullavaraanenna addeham samshayichu. railway, shipping thozhilaallikalile varnnaandhatha kandethunnathinulla chittayayathum vishwasaneeyavumaaya oru reethiyaayi holngrens testt vegathil svayam sthaapichu. holngrante gaveshanathetthudarnnu, 1875-ll sweedish railway authority testt kammeeshan cheyyukayum sweedenil railway, shipping thozhilaallikalkk varnnaandhatha parisodhana nirbandhamaakkukayum cheythu. varnnaandhatha kandethunnathinulla aadyathe vijayakaramaya sramamaayirunnu yadhaartha holngren parisodhana.
varnnadhaaranathekkurichu yuva-helmholts sidhaanthathe adisthaanamaakki holngren thante parisodhana vikasippichu. nirangalkk peridunnathinupakaram poruthappedunna tharatthilaanu holngen testt roopakalppana cheythirikkunnathu. yadhaartha pareekshanam kooduthal budhimuttaayirunnu.
doow. vilyam thomson yadhaartha holngren parisodhana lalithamaakki. 1879ll american sarkkar railwake shipping vendi varnna-andhamaya parisodhana nadatthaan thomsanine niyogichu. holngrans reethi lalithamakkaan thompson pravarthichu, athuvazhi oru "professional allatha" parisodhana nadatthaanum phalangal vyaakhyaanathinaayi oru vidagthanu kaimaran kazhiyum. thompson poruthappedunna nirangalude ennam kuraykkukayum oronninum akkamidukayum cheythu. oru valia koottam aalukalil upayogikkunna manashaasthraparamaaya parisodhanayude aadyakaala udaaharanangalilonnaanu eee parisodhana. eee parishodhanaykk pinneedu holngren-thomson testt ennu perittu.
1895 muthal 1913 vare kadalyaathrakkaarude varnnadarsanam pareekshikkaan britiish board oof trade holngrans wool testt upayogichu.
pareeksha.
holngrans wool testtil, rogiyodu niramulla noolinte toliye pettiyile saambilukalumaayi poruthappedutthaan aavashyappedunnu. aadyam, rogiyodu ilam pacha niratthilulla maasttar eiii. yumayi ettavum yojikkunna 10 tholikalaaya 40 tholikalil ninnu thiranjedukkaan aavashyappedunnu.
sheshikkunna 30 tholikalil ninnu, chuvanna maasttar sii yumayi ettavum yojikkunna 5 tholikal thiranjedukkaan rogiyodu aavashyappedunnu.
avasaanamaayi, rooss maasttar biyumaayi poruthappedunnathinu sheshikkunna 25 ll ninnu 5 tholikal thiranjedukkaan rogiyodu aavashyappedunnu.
thettukal moolam varnnaandhathayude tharam doctorq nirnnayikkaan kazhiyum. chuvapp matching testtil rogi neela allengil violet nirangal thiranjedukkukayaanenkil, athinartham avarkk chuvanna andhathayundennaanu. rogi pacha niratthil chaaraniramo irunda thavitt niramo thiranjedukkukayaanenkil, avarkk pacha andhathayude prashnamundaayekkaamenna ithu soochippikkunnu. violet varnna parisodhanayil vishayam pacha allengil manja nirangal eshtappedunnuvenkil, avaa violet aayi thakaraarullathaan.

