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7Â¥: Originally posted by appleyankai at 2013-03-02 15:53:59
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If you rely on EDC-NHS coupling, you have to provide suitable conditions, pH 4-6. But meanwhile you have to retain the activity of folic acid.

Here is the reported properties of folic acid£¬                        
                          Readily soluble in alkali, hydroxides and
                         carbonates. Insoluble in alcohol, acetone,
                         chloroform and ether. Solutions are inactivated
                         by ultraviolet light. Alkaline solutions are
                         sensitive to oxidation and acid solutions are
                         sensitive to heat. Dissociation constant - pKa
                         4.7, 6.8, 9.0 (30¡ã) (Moffat, 1986).
http://www.inchem.org/documents/pims/pharm/folicaci.htm
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4Â¥2012-05-26 08:30:44
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mwyuer: ½ð±Ò+1, ¸Ðл»ØÌû½»Á÷ 2012-05-28 08:46:26
ÄãÕâ¸ö·´Ó¦ÓÐÎÊÌ⣬EDC/NHSÒ»°ãÊÇÔÚËáÐÔÈÜÒºÖз´Ó¦£¬ÔÚ0.1MNaOHÖÐûʲô×÷ÓðÉ
5Â¥2012-05-26 23:21:48
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appleyankai

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4Â¥: Originally posted by yyl200661112 at 2012-05-26 08:30:44
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