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yanghong206

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yanghong206(½ð±Ò+25, ·­ÒëEPI+1): 2011-02-17 23:01:51
The ethanol precipitation method was adopted to extract exopolysaccharide from marine microbial fermentation. Then,  the extract was isolated against 732 cation exchange resin into three major polysaccharide components: alkaline polysaccharide, weak acidic polysaccharides and acidic polysaccharides. And the polysaccharides were assessed for antioxidant activity against reducing power activity, DPPH radical scavenging activity and hydroxyl radical scavenging activity assays.
3Â¥2011-02-14 15:17:25
ÒÑÔÄ   »Ø¸´´ËÂ¥   ¹Ø×¢TA ¸øTA·¢ÏûÏ¢ ËÍTAºì»¨ TAµÄ»ØÌû
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ringzhu(½ð±Ò+25): ~~¸øÄãÌÖ»ØÀ´µÄ 2011-02-23 10:56:16
Extracted extracellular polysaccharide from fermentation liquid in sea water via ethanol precipitation,then obtained three main polysaccharides for instance alkalline polysaccharides, weak acid polysaccharides and acidic polysaccharides which were separated through 732 cation exchange resin and in succession determined their antioxidant activities like reduction activity, free radical scavenging activity and hydroxyl radical scavenging activity.The results indicated that weak acid polysaccharides had the highest antioxidant activity.The inhibitory-fungal antibiotic experiment showed that the three polysaccharides have some antimicrobial activity to Physalospora piricola, Pythium aphanidermatum,Botrytis cinerea and Fusarium pathogens,especially have high effect on Botrytis cinerea.
2Â¥2011-02-14 13:48:15
ÒÑÔÄ   »Ø¸´´ËÂ¥   ¹Ø×¢TA ¸øTA·¢ÏûÏ¢ ËÍTAºì»¨ TAµÄ»ØÌû
The results indicated that weak acid polysaccharides had the highest antioxidant activity. Following inhibitory-fungal antibiotic experiment showed that the three polysaccharides all have antimicrobial activity to Physalospora piricola, Pythium aphanidermatum,Botrytis cinerea and Fusarium pathogens to some extent, and  obvious effect to Botrytis cinerea especially.
4Â¥2011-02-14 15:25:07
ÒÑÔÄ   »Ø¸´´ËÂ¥   ¹Ø×¢TA ¸øTA·¢ÏûÏ¢ ËÍTAºì»¨ TAµÄ»ØÌû

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yanghong206(½ð±Ò+25): 2011-02-17 23:02:01
ringzhu(½ð±Ò-25): Óë2Â¥Ïàͬ ³­Ï®Ö®ÏÓ ¾´ÇëÀí½â ÓÐÒìÒé¿É¾Ù±¨ ¶àл~~ 2011-02-23 10:55:53
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5Â¥2011-02-15 11:28:09
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