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Bisorption of Organic Compounds by Spirulina Subsalsa
Chen, Yong-Sheng,Zhuang, Yuan-Yi,Dai, Shu-Gui CHOSUN UNIVERSITY 1997 Basic Science and Engineering Vol.1 No.1
In this paper, the biosorption of 13 organic compounds was investigated by using biomass of nonliving, dried algae Spirulina subsalsa as sorbent. The results showed that: the biosorption of `13 organic compounds could be described by the Freundlich isoterm. The isoterm binding constants suggested that the biosorption capacity series was phenlo > o-dihydroxy benzene > p-dihydroxy benzene > o-aminophenol > chlorophenol > 2,4-dichlorophenol for 6 phenolic compounds and alkaline blue BO > active blue KN-R > acidic red 4BS > black G > brown MM > blue 5B > black ATT for 7 dyes. The biosorption constants (lgk) of above 6 phenolic compounds showed a good linear correlation to their molecular connectivity index. Keywords: biosorption, biosorbent, phenolic compounds, dye, algae, Spirulina subsalsa, molecular commectivity index
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A SANDWICH-INJECTION METHOD FOR MICROCHIP ELECTROPHORESIS
JIAN-LONG ZHAO,GANG LI,GUI-SHENG ZHUANG,HONG-BO ZHOU,YUAN-SEN XU 성균관대학교(자연과학캠퍼스) 성균나노과학기술원 2007 NANO Vol.2 No.6
In microchip electrophoresis (μ-CE), sample injection is generally achieved through cross, double-T, or T-form injector structures. In these reported approaches, the separation efficiency and detection sensitivity of μ-CE is significantly influenced by the shape and size of the sample plug introduced into the separation channel or sample leakage in separation phase. Here, we present a sandwich-injection method for controlling discrete sample injection in μ-CE. This method involves four accessory arm channels in which symmetrical potentials are loaded to form a unique parallel electric field distribution at the intersection of sample and separation channels. The parallel electric field effectuate a virtual wall to confine the shape of a sample plug and depress the spreading of the sample plug at the junction of sample and separation channels, and also prevent sample leakage during separation step. The key features of this method are the ability to inject well-defined sample plugs at the original sample concentration and the ability to control the sample plug size. The virtues of the novel injection technique were demonstrated with numerical models and validated with fluorescence visualizations of electrophoretic experiments.
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