...
  • 主题
高级搜索  >
历史搜索 清空历史
首页> 外文期刊>Preparative Biochemistry and Biotechnology >(TRANS)ESTERIFICATION OF MANNOSE CATALYZED BY LIPASE B FROM Candida antarctica IN AN IMPROVED REACTION MEDIUM USING CO-SOLVENTS AND MOLECULAR SIEVE
【24h】

(TRANS)ESTERIFICATION OF MANNOSE CATALYZED BY LIPASE B FROM Candida antarctica IN AN IMPROVED REACTION MEDIUM USING CO-SOLVENTS AND MOLECULAR SIEVE

机译：共溶剂和分子筛在改进反应介质中对南极假丝酵母脂肪酶B催化甘露糖的（反式）酯化反应

获取原文
获取原文并翻译 | 示例
           
页面导航
  • 摘要
  • 著录项
  • 相似文献
  • 相关主题

摘要

Four co-solvents (dimethylformamide [DMF], formamide, dimethyl sulfoxide [DMSO], and pyridine) were tested with tert-butanol (tBut) to optimize the initial rate (v0) and yield of mannosyl myristate synthesis by esterification catalyzed by immobilized lipase B from Candida antarctica. Ten percent by volume of DMSO resulted in the best improvement of v0 and 48-hr yield (respectively 115% and 13% relative gain compared to pure tBut). Use of molecular sieve (5% w/v) enhances the 48-hr yield (55% in tBut/DMSO [9:1, v/v]). Transesterification in tBut/DMSO (9:1, v/v) with vinyl myristate leads to further improvement of v0 and 48-hr yield: a relative gain of 85% and 65%, respectively, without sieve and 25% and 10%, respectively, with sieve, compared to esterification. No difference in v0 and 48-hr yield is observed when transesterification is carried out with or without sieve.View full textDownload full textKeywordsacylation, initial rate, myristic acid, novozym 435, sugar ester, vinyl esterRelated var addthis_config = { ui_cobrand: "Taylor & Francis Online", services_compact: "citeulike,netvibes,twitter,technorati,delicious,linkedin,facebook,stumbleupon,digg,google,more", pubid: "ra-4dff56cd6bb1830b" }; Add to shortlist Link Permalink http://dx.doi.org/10.1080/10826068.2011.622330
机译：用叔丁醇（tBut）测试了四种助溶剂（二甲基甲酰胺[DMF]，甲酰胺，二甲基亚砜[DMSO]和吡啶）以优化初始速率（v 0 ）和甘露糖基的收率固定化南极假丝酵母脂肪酶B催化酯化合成肉豆蔻酸酯。体积分数为DMSO的10％可使v 0 和48小时的产量得到最佳改善（与纯tBut相比，相对增益分别为115％和13％）。使用分子筛（5％w / v）可提高48小时收率（tBut / DMSO中为55％[9：1，v / v]）。肉豆蔻酸乙烯酯在tBut / DMSO（9：1，v / v）中进行酯交换反应可进一步提高v 0 和48小时收率：相对收率分别为85％和65％，而没有与酯化相比，分别用25％和10％的比例过筛。在有或没有筛子的情况下进行酯交换反应时，v 0 和48小时收率均未见差异。全文addthis_config = {ui_cobrand：“泰勒和弗朗西斯在线”，servicescompact：“ citeulike，netvibes，twitter，technorati，delicious，linkedin，facebook，stumbleupon，digg，google，更多”，发布：“ ra-4dff56cd6bb1830b”};添加到候选列表链接永久链接http://dx.doi.org/10.1080/10826068.2011.622330

著录项

相似文献

  • 外文文献
  • 中文文献
  • 专利
获取原文

客服邮箱：kefu@zhangqiaokeyan.com

京公网安备：11010802029741号 ICP备案号：京ICP备15016152号-6 六维联合信息科技 (北京) 有限公司©版权所有

  • 客服微信

  • 服务号