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ÎÒ×öµÄ¿Ç¾ÛÌǵݱ»ùºÍÒ»¸ö³¤Á´ôÈËáͨ¹ýÐγÉõ£°·¼üÏàÁ¬ ÇëÎʾßÌåÊÇÈçºÎͨ¹ýH NMR¼ÆËã¿Ç¾ÛÌÇÑÜÉúÎïµÄÈ¡´ú¶È£¿ £¨1£© DS was calculated by comparing the ratio of linolenyl methyl protons ( 1.3 ppm) to sugar protons( 3.5-4.5 ppm) £¬which can be defined as the number of linolenic acid groups per 100 anhydroglucose units of chitosan. The obtained DS was 1.8. ¡¾J. Agric. Food Chem., Vol. 53, No. 2, 2005¡¿ £¨2£©DS, defined as the number of palmitoyl groups per 100 sugar residues of chitosan, was calculated by 1H NMR using the ratio of palmitoyl methyl protons (0.86 ppm) to H-2 protons ( 2.89 ppm) of chitosan. ¡¾VOL. 3, NO. 2 MOLECULAR PHARMACEUTICS ¡¿ ΪʲôÕâÁ½ÆªÎÄÏ׵ļÆËã·½·¨²»Ò»ÑùÄØ |
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