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       CHIT was modified with GDI by adding dropwise the 0.10 wt % CHIT solution to a 50 wt % GDI solution until the molar ratio of GDI to chitosan glucosamine units was 200:1. The mixture was stirred at room temperature for 24 h, and the unreacted GDI was separated from the CHIT-GDI product by multiple extractions with ethyl ether.
       ÇëÎÊ¡°until the molar ratio of GDI to chitosan glucosamine units was 200:1¡±£¬Òª´ïµ½ÕâÀïÒªÇóµÄ200:1£¬50 wt%µÄÎì¶þÈ©ºÍ0.1 wt%¸÷ÐèÒª¶àÉÙÌå»ý£¿Ê¹ÓõĿǾÛÌÇÊÇsigmaÂòµÄ£ºmol wt Ϊ         mol wt 50,000-190,000 Da (based on viscosity)£¬Physical form   75-85% ÍÑÒÒõ£»¯¡£
       »òÕßÄܸæËßÎÒÔõô¼ÆËã¿Ç¾ÛÌÇ£¨mol wt Ϊ         mol wt 50,000-190,000 Da (based on viscosity)£¬Physical form   75-85% ÍÑÒÒõ£»¯£©µÄÌǰ·µÄĦ¶ûÊý¡£
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²Î¿¼µÄÎÄÏ×Ϊ Xin Wei, Juan Cruz, and Waldemar Gorski*£¬ Integration of Enzymes and Electrodes: Spectroscopic and Electrochemical Studies of Chitosan-Enzyme Films£¬ Anal. Chem. 2002, 74, 5039-5046¡£
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