An enzyme electrode biosensor for inosine determination / 生物工程学报

An enzyme electrode biosensor was used for the amperometric determination of inosine in its tablets by co-immobilizing nucleoside phosporylase and xanthine oxidase on a hydrogen peroxide electrode. As a fundamental electrode the hydrogen peroxide electrode has an advantage of stability in analysis compared with the 02 electrode. The enzyme electrode showed a linear response to inosine in the range of 1-268 mg/L with a response of 60 seconds under a sample injection volume of 25 microL. Based on the enzyme electrode, inosine solutions were determined with an average recover rate of 100.8% and a relative standard deviation (RSD) of les than 0.14% in 20 assays. The lifetime of the enzyme electrode was relative long and could be used continuously at 25 degrees C for 25 days. These results demonstrated that the enzyme electrode biosensor could be used to determine inosine and its derivatives specifically, rapidly, conveniently and economically.

Influences of wild,degradative,and rejuvenative Armillearia mellea on yield of Gastrodia elata and content of gastrodin / 中草药

Objective By rejuvenation of degradative strain,the effects of Armillearia mellea to promote the growth of Gastrodia elata and to accumulate the gastrodin in G.elata could be recovered.Methods G.elata was inoculated with same variety of G.elata with A.mellea of wild strain,degradative strain for continuously asexual reproduction and rejuvenative strain,and the yield of G.elata and the content of gastrodin of G.elata were determined.Results The significant differences(P