An effective and fast method for assay of micro-amounts of glucose was set up. A new technique for preparation of enzyme columns based on enzyme immobilization by sol-gel was investigated. Glucose oxidase(GOD) and hor...
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An effective and fast method for assay of micro-amounts of glucose was set up. A new technique for preparation of enzyme columns based on enzyme immobilization by sol-gel was investigated. Glucose oxidase(GOD) and horseradish peroxidase(HRP) mixed with SiO 2 nanoparticles and polyvinyl butyral(PVB) medium were immobilized on the surface of capillary tube, respectively. The experimental results show that nanoparticles can significantly enhance the catalytic activity of immobilized enzyme. Based on GOD column and HRP column, a liquid droplet sensor was developed for the determination of glucose solution. The effect of separated columns and mixed columns on the response of glucose sensor was investigated. The sensor showed a linear response in a range of 2-400 ng/mL with a detection limit of 0.3 ng/mL under the optimum conditions. The characteristics of the sensor including effect of flow-rate, pH and temperature were discussed.
Nystatin is a polyene antifurgal drug to which many molds and yeasts are sersitive, including cryptococcus neoformans, candida, aspergillus, etc. To realize the mechanism of nystatin more particularly, the techniques ...
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Nystatin is a polyene antifurgal drug to which many molds and yeasts are sersitive, including cryptococcus neoformans, candida, aspergillus, etc. To realize the mechanism of nystatin more particularly, the techniques of SPR and impedance were used to investigate the interaction between nystatin and two kinds of solid-supported phospholipid membranes. The results show that nystatin could interact with pure phospholipid membranes, whether they are monolayer or bilayer. In addition, impedance spectra show that ion channels may be formed when nystatin interacted with phospholipid membranes.
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