排序方式: 共有12条查询结果,搜索用时 15 毫秒
1.
2.
Liquid crystal effects on bacterial viability 总被引:1,自引:0,他引:1
Christopher J. Woolverton Erin Gustely Lanfang Li Oleg D. Lavrentovich 《Liquid crystals》2005,32(4):417-423
The primary objective of this research was to test the hypothesis that lyotropic chromonic liquid crystals (neutral grey, red 14, blue 27, cromolyn) are not toxic to bacteria as compared with surfactant-based lyotropic (CPCl and CsPFO) or thermotropic (5CB and E7) liquid crystals. Biocompatibility of most liquid crystals is currently unknown and is required for the development of systems interfacing liquid crystals and biological systems. Potential liquid crystal toxicity was evaluated by two methods. The first examined bacterial survival measured by bacterial growth over 24 hours, after exposure to various liquid crystals. The second toxicity method evaluated liquid crystal effects on bacterial membrane permeability using two fluorescent dyes. Three different types of bacteria were evaluated to assess bacterial structure differences with respect to liquid crystal toxicity. The results of this study indicate that lyotropic chromonic liquid crystals are not toxic to bacteria, whereas thermotropic and surfactant-based lyotropic liquid crystals are toxic to one or more forms of bacteria. We conclude that lyotropic chromonic liquid crystals may be the preferred material in designing liquid crystal-based systems that interact with biological systems, especially in the use of liquid crystal-based biosensors. 相似文献
3.
4.
5.
6.
7.
Christopher J. Woolverton Corresponding author Erin Gustely Lanfang Li Oleg D. Lavrentovich 《Liquid crystals》2013,40(4):417-423
The primary objective of this research was to test the hypothesis that lyotropic chromonic liquid crystals (neutral grey, red 14, blue 27, cromolyn) are not toxic to bacteria as compared with surfactant‐based lyotropic (CPCl and CsPFO) or thermotropic (5CB and E7) liquid crystals. Biocompatibility of most liquid crystals is currently unknown and is required for the development of systems interfacing liquid crystals and biological systems. Potential liquid crystal toxicity was evaluated by two methods. The first examined bacterial survival measured by bacterial growth over 24 hours, after exposure to various liquid crystals. The second toxicity method evaluated liquid crystal effects on bacterial membrane permeability using two fluorescent dyes. Three different types of bacteria were evaluated to assess bacterial structure differences with respect to liquid crystal toxicity. The results of this study indicate that lyotropic chromonic liquid crystals are not toxic to bacteria, whereas thermotropic and surfactant‐based lyotropic liquid crystals are toxic to one or more forms of bacteria. We conclude that lyotropic chromonic liquid crystals may be the preferred material in designing liquid crystal‐based systems that interact with biological systems, especially in the use of liquid crystal‐based biosensors. 相似文献
8.
Harding WW Hodge M Wang Z Woolverton WL Parrish D Deschamps JR Prisinzano TE 《Tetrahedron: Asymmetry》2005,16(13):2249-2256
The enantioselective synthesis of the (R,R)- and (S,S)-enantiomers of 1 from commercially available 3-chlorocinnamic acid is reported. The Sharpless asymmetric epoxidation was used to establish the stereocenters in the synthesis of both enantiomers of 1. 相似文献
9.
WL van Neerven 《Pramana》2000,55(1-2):101-111
We present some techniques which have been developed recently or in the recent past to compute Feynman graphs beyond one-loop
order. These techniques are useful to compute the three-loop splitting functions in QCD and to obtain the complete second
order QED corrections to Bhabha scattering. 相似文献
10.