• 主题
高级搜索  >
历史搜索 清空历史
首页> 外文期刊>African Journal of Biotechnology >Biotransformation of indigo carmine to isatin sulfonic acid by lyophilized mycelia from Trametes versicolor
【24h】

Biotransformation of indigo carmine to isatin sulfonic acid by lyophilized mycelia from Trametes versicolor

机译：冻干菌丝体的冻干菌丝将靛蓝胭脂红生物转化为靛红磺酸

获取原文
           
页面导航
  • 摘要
  • 著录项
  • 相似文献
  • 相关主题

摘要

In this work, acrylonitrile (AN) and acrylic acid (AA) monomers were directly grafted onto chitosan using ammonium persulfate (APS) as an initiator and methylenebisacrylamide (MBA) as a crosslinking agent under an inert atmosphere. The hydrogels structure was characterized by Fourier transform infrared?(FTIR)spectroscopy, scanning electron microscopy (SEM) and thermogravimetric analysis (TGA). The effect of grafting variables, that is, AA/AN weight ratio and concentration of MBA and APS, was systematically optimized to achieve a hydrogel with swelling capacity as high as possible. The water absorbency increased with increasing the AA amount in the monomer feed due to formation of polyelectrolyte. The swelling of the hydrogel samples in saline solution (0.15 mol/l NaCl, CaCl2?and AlCl3) was examined.?The?results indicate that the swelling capacity decreased with an increase in the ionic strength of the swelling medium. This behavior can be attributed to charge screening effect for monovalent cations, as well as ionic crosslinking for multivalent cations. Furthermore, the swelling of superabsorbing hydrogels was examined in solutions with pH values ranging between 1 and 13.
机译：在这项工作中，在惰性气氛下，使用过硫酸铵（APS）作为引发剂和亚甲基双丙烯酰胺（MBA）作为交联剂，将丙烯腈（AN）和丙烯酸（AA）单体直接接枝到壳聚糖上。通过傅里叶变换红外光谱（FTIR），扫描电子显微镜（SEM）和热重分析（TGA）对水凝胶的结构进行了表征。系统地优化了接枝变量（AA / AN重量比以及MBA和APS浓度）的影响，以实现具有尽可能高溶胀能力的水凝胶。由于聚电解质的形成，吸水率随着单体进料中AA量的增加而增加。检测了水凝胶样品在盐溶液（0.15 mol / l NaCl，CaCl2和AlCl3）中的溶胀。结果表明，溶胀能力随着溶胀介质离子强度的增加而降低。此行为可归因于单价阳离子的电荷屏蔽效应，以及多价阳离子的离子交联。此外，在pH值为1到13的溶液中检查了超吸收水凝胶的溶胀。

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