MARTEK BIOSCIENCES CORP
EXHIBIT 10.61
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<TYPE>EX-10.61
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<DESCRIPTION>EXHIBIT 10.61
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<P align="right"><FONT size="2"><B>EXHIBIT 10.61</B></FONT>

<P align="center"><FONT size="2"><B>MARTEK BIOSCIENCES CORPORATION<BR>
PROMISSORY NOTE</B>
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<P align="right"><FONT size="2"><B>Baltimore, Maryland</B></FONT>

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    <TD valign="top"><FONT size="2"><U><B>$10,000,000.00</B></U></FONT></TD>

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<B><U>Date: January&nbsp;26, 2004</U></B></FONT></TD>
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<P align="left"><FONT size="2">&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;<B>FOR VALUE RECEIVED</B>, Martek Biosciences Corporation, a Delaware corporation
(the &#147;<B>Company</B>&#148;), does hereby promise to pay to the order of Genencor
International, Inc., a Delaware corporation (&#147;<B>Genencor</B>&#148;) or its permitted
assigns (the &#147;<B>Holder</B>&#148;), at its office at 200 Meridian Center Boulevard,
Rochester, New York 14618 (or at such other place or places as Holder may
designate from time to time upon reasonable notice to the Company), the
principal sum of <B>TEN MILLION AND NO/100 DOLLARS</B>
($<B><U>10,000,000.00</U></B>) under the terms and conditions of this
Promissory Note (this &#147;<B>Note</B>&#148;).
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<P align="left"><FONT size="2">&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;<B><U>Unsecured Obligation</U></B>. This Note is an unsecured
obligation of the Company. The Holder of this Note shall have recourse only to
the general unsecured assets of the Company.
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<P align="left"><FONT size="2">&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;<B><U>Interest Accrual</U></B>. The outstanding principal balance of
this Note shall bear interest from the date hereof until payment in full at the
rate of five per cent (<U>5%</U>) per annum. Interest shall be
computed on the basis of a three hundred sixty-day year on the actual number of
days the principal is outstanding during each annual interest period.
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<P align="left"><FONT size="2">&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;<B><U>Payments of Interest and Principal</U></B>. Payments of
accrued interest shall be made monthly on the last calendar day of each month,
commencing on January&nbsp;31, 2004 and on the Maturity Date (<U>as defined
below</U>). The Company further shall pay all accrued and unpaid
interest which is payable under that certain Second Amended and Restated
Promissory Note dated September&nbsp;5, 2003 made by the Company payable to the
order of Genencor, which has accrued to the date hereof, on January&nbsp;31, 2004.
Principal payments on this Note shall be made monthly on the last calendar day
of each month, commencing on January&nbsp;31, 2004, each such principal payment in
the amount equal to Forty-One Thousand Six Hundred Sixty-Seven Dollars
($<U>41,667)</U>. The entire unpaid principal amount plus accrued
interest under this Note shall be due and payable on the Maturity Date. Except
as provided for under &#147;Prepayment&#148; below, payments of principal and interest
shall be paid in lawful money of the United States of America at the office of
the Holder as indicated in the initial paragraph of this Note or at such other
place as Holder may designate in writing to the Company from time to time.
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<P align="left"><FONT size="2">&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;<B><U>Prepayment</U></B>. This Note may be prepaid in whole or in
part, at any time, without penalty, in cash, or in such other consideration as
the Company and Holder may agree.
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<P align="left"><FONT size="2">&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;<B><U>Late Charges</U></B>. In the event any payment of interest or
principal is delinquent more than fifteen (<U>15</U>) days, the
Company will pay to Holder a late charge
of four percent (<U>4%</U>) of the amount of the overdue
payment. This provision for late charges shall not be deemed to extend the
time for payment or be a &#147;<B>grace period</B>&#148; or &#147;<B>cure period</B>&#148; that gives the Company
the right to cure an Event of Default (as hereinafter defined). Acceptance by
Holder of any late payment(s) shall not constitute a waiver by holder of any
default hereunder.
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<P align="left"><FONT size="2">&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;<B><U>Maturity and Release</U></B>. If not paid earlier pursuant to
the terms of this Note, the entire outstanding principal balance plus all
accrued and unpaid interest due and payable under this Note shall be due and
payable on December&nbsp;31, 2008 (the &#147;<B>Maturity Date</B>&#148;).
</FONT>
<P align="left"><FONT size="2">&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;<B><U>Acceleration Period</U></B>. In the event that (a)&nbsp;the Company
shall <I>(i) </I>fail to make any interest or principal payment in the amount
specified herein within five (<U>5</U>) business days of the
payment becoming due in accordance with the terms hereof, or <I>(ii) </I>fail to make
any other payments hereunder within five (<U>5</U>) business days
of the payment becoming due, (b)&nbsp;there is a breach of any of the covenants and
provisions contained in this Note and such breach shall continue for a period
of at least thirty (<U>30</U>) days after notice of such has been
given by the Holder to the Company, or (c)&nbsp;an &#147;Event of Default&#148; as defined in
that certain Non Compete Covenant in Assignee&#146;s Favor, attached hereto as
<B><U>Exhibit&nbsp;A,</U> </B>shall have occurred and be continuing (each an
&#147;Event of Default&#148; hereunder), then in such event the Holder may without
further notice, declare the remainder of the principal sum, together with all
interest accrued thereon, at once due and payable. Failure to exercise this
option shall not constitute a waiver of the right to exercise the same at any
other time. The unpaid balance of this Note and any part thereof plus all
accrued interest due under this Note, shall bear interest at the rate of ten
percent (<U>10%</U>) per annum after an acceleration hereof until
paid. The Company hereby waives protest, presentment, notice of dishonor, and
notice of acceleration of maturity. Following an acceleration hereof, the
Holder may employ an attorney to enforce the Holder&#146;s rights and remedies and
the Company hereby agrees to pay to the Holder reasonable attorney&#146;s fees plus
all other reasonable expenses incurred by the Holder in exercising any of the
Holder&#146;s rights and remedies.
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<P align="left"><FONT size="2">&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;<B><U>Expenses</U></B>. The Company shall pay the reasonable
expenses of Holder, including the expenses and reasonable attorneys&#146; fees, paid
or incurred by such party in connection with the preparation of this Note.
</FONT>
<P align="left"><FONT size="2">&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;<B><U>Business Day</U></B>. If any payment of principal or interest
shall be due on a Saturday, Sunday or any other day on which banking
institutions in the State of Maryland are required or permitted to be closed,
such payment shall be made on the next succeeding business day and such
extension of time shall be included in computing interest hereunder.
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<P align="left"><FONT size="2">&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;<B><U>Application of Payments</U></B>. All sums received by Holder
for application to the Note may be applied by Holder to late charges, expenses,
costs, interest, principal and other amounts owing to Holder in connection with
the Note in the order selected by holder in its sole discretion.
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<P align="left"><FONT size="2">&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;<B><U>Successors and Assigns</U></B>. This Note may not be assigned
by Genencor (or any other Holder hereof), in whole or in part, at any time,
without the prior written consent of the Company. This Note shall be binding
upon the successors and assigns of the Company and shall inure to the benefit
of the permitted successors and assigns of the Genencor.
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<P align="left"><FONT size="2">&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;This Note is made and delivered in South Carolina and shall be governed
and construed in accordance with the laws of the State of South Carolina.
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<P align="center"><FONT size="2">2</FONT>
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<P align="left"><FONT size="2">&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;<B>IN WITNESS WHEREOF</B>, the Company has duly executed this Promissory Note
under seal as of the date set forth above.
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    <TD colspan="5" valign="top" align="left"><FONT size="2"><B>MARTEK BIOSCIENCES CORPORATION</B></FONT></TD>
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By:</FONT></TD>
    <TD align="left" valign="top"><FONT size="2">/s/&nbsp;Peter L.
Buzy</FONT></TD>
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Name:</FONT></TD>
    <TD align="left" valign="top"><FONT size="2">&nbsp;&nbsp;Peter L. Buzy</FONT></TD>
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Title:</FONT></TD>
    <TD align="left" valign="top"><FONT size="2">&nbsp;&nbsp;Chief Financial
Officer</FONT></TD>
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<P align="left"><FONT size="2">&#091;Corporate Seal&#093;<BR>
ATTEST:
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<P align="left"><FONT size="2">/s/&nbsp;George P. Barker<BR>
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Secretary
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<P align="center"><FONT size="2">3</FONT>
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