我们通过甲基丙烯酸酯单体与阳离子或疏水基团的自由基共聚合成了阳离子无规两亲共聚物,并评估了其抗菌和溶血活性。系统地改变疏水基团的性质以及聚合物组成和长度,以研究结构参数如何影响聚合物活性。这使我们能够获得适合用作无毒抗菌剂以及非选择性聚合杀菌剂的最佳聚合物组合物。抗菌活性与疏水基团 ( f HB ) 的摩尔分数呈 S 形关系。溶血活性随着f HB 的增加而增加,并在高f HB值时趋于稳定,特别是对于高分子量聚合物。每个聚合物系列的 HC 50值与聚合物链中疏水侧链数量的关系图在双对数图中显示出良好的相关性和线性关系。我们还开发了一个理论模型来分析聚合物的溶血活性,并证明溶血活性可以描述为通过将疏水侧链分配到脂质层和聚合物链的疏水塌陷来实现聚合物膜结合的平衡。对染料标记聚合物与大的单层囊泡的膜结合的研究表明,聚合物的疏水性增强了它们与脂质双层的结合,并诱导溶液中聚合物链的塌陷,降低了聚合物对膜的表观亲和力。
我们通过甲基丙烯酸酯单体与阳离子或疏水基团的自由基共聚合成了阳离子无规两亲共聚物,并评估了其抗菌和溶血活性。系统地改变疏水基团的性质以及聚合物组成和长度,以研究结构参数如何影响聚合物活性。这使我们能够获得适合用作无毒抗菌剂以及非选择性聚合杀菌剂的最佳聚合物组合物。抗菌活性与疏水基团 ( f HB ) 的摩尔分数呈 S 形关系。溶血活性随着f HB 的增加而增加,并在高f HB值时趋于稳定,特别是对于高分子量聚合物。每个聚合物系列的 HC 50值与聚合物链中疏水侧链数量的关系图在双对数图中显示出良好的相关性和线性关系。我们还开发了一个理论模型来分析聚合物的溶血活性,并证明溶血活性可以描述为通过将疏水侧链分配到脂质层和聚合物链的疏水塌陷来实现聚合物膜结合的平衡。对染料标记聚合物与大的单层囊泡的膜结合的研究表明,聚合物的疏水性增强了它们与脂质双层的结合,并诱导溶液中聚合物链的塌陷,降低了聚合物对膜的表观亲和力。
Evaluation of Multivalent Dendrimers Based on Melamine: Kinetics of Thiol−Disulfide Exchange Depends on the Structure of the Dendrimer
作者:Wen Zhang、Shane E. Tichy、Lisa M. Pérez、Gheorghe C. Maria、Paul A. Lindahl、Eric E. Simanek
DOI:10.1021/ja0210906
日期:2003.4.1
The rate of thiol-disulfideexchange of dansyl groups mediated by dithiothreitol depends on the structure of the dendrimer. In general, the rate of exchange decreases as the size of the dendrimer increases. Dendrimers with disulfides attached near the core undergo exchange more slowly than dendrimers with disulfides near the periphery. Exchange is a bimolecular (noncooperative) process between dansyl-linked
Methods for detecting and categorizing skin sensitizers
申请人:University of Mississippi
公开号:US10261017B2
公开(公告)日:2019-04-16
Methods for detecting skin sensitization chemical compounds using Nuclear Magnetic Resonance (NMR) spectroscopy and/or a microplate spectrophotometric assay or other spectroscopic methods. The presently disclosed subject matter relates to a method of detecting skin sensitization potential of a test chemical compound using Nuclear Magnetic Resonance (NMR) spectroscopy, microplate spectrophotometry or other spectroscopic methods as stand-alone or in combination.
Polymer brushes for immobilizing molecules to a surface and having water-soluble or water-dispersible segments therein and probes bonded thereto
申请人:——
公开号:US20020001845A1
公开(公告)日:2002-01-03
Sensors for determining the presence and concentration of bio-molecules in a biological sample are provided in the form of polymer brushes, which comprise a substrate having a surface that is modified with a water-dispersible or water-soluble polymer segment having functional groups that bind probes. The method of synthesis of such sensors preferably includes use of controlled free radical polymerization techniques, and in particular the use of an iniferter initiator, which allows for controlled architecture polymers to modify the surface of the substrate. In this manner functional groups in the polymer chain are removed from the surface, which allows for solution chemistry to be more realistically reproduced with the benefits of a solid bound probe.
Polymer brushes for immobilizing molecules to a surface or substrate having improved stability
申请人:Symyx Technologies, Inc.
公开号:US20030108879A1
公开(公告)日:2003-06-12
Sensors for determining the presence and concentration of biomolecules in a biological sample are provided in the form of polymer brushes, which comprise a substrate having a surface modified with a hydrophobic polymer segment, attached to which is a water-dispersible or water-soluble polymer segment having functional groups that bind probes. The method of synthesis of such sensors preferably includes use of controlled free radical polymerization techniques, which allows for controlled architecture polymers to modify the surface of the substrate, and the use of monomers possessing functional groups which do not require activation prior to probe attachment. In this manner functional groups in the polymer chain are removed from the surface, which allows for solution chemistry to be more realistically reproduced with the benefits of a solid bound probe.