北京盈盛恒泰科技有限責(zé)任公司是一家專業(yè)從事食品分析檢測儀器和環(huán)境應(yīng)急檢測儀器的銷售技術(shù)支持和售后服務(wù)工作公司目前是日本INSENT日本JWP意大利VELP美國FTC德國AIRSENSE德國OWR美國UNITY美國Navas美國FiltationEngineering等世界儀器制造商的ZG區(qū)營銷合作伙伴和技術(shù)服務(wù)ZX，產(chǎn)品覆蓋食品感官分析食品營養(yǎng)分析食品安全檢測及環(huán)境應(yīng)急監(jiān)測等公司在香港北京上海廣州成都?？阢y川等地設(shè)有分公司和辦事機(jī) The effect of glutaraldehyde on the conformational properties of Kluyveromyces lactis -galactosidase was determined. The optimum substrate of the enzyme interchanged from lactose to sucrose when it reacted with a certain concentration of glutaraldehyde. Its mechanism was studied by detecting the changes in fluorescence absorption. This is the first discovery that -galactosidase can be converted to another kind of enzyme which can catalyze sucrose to produce glucose rather than lactose. On the basis of this phenomenon, an amperometric sucrose biosensor using -galactosidase modified by glutaraldehyde as the immobilized enzyme and poly--cyclodextrin as the carrier was prepared. The response characteristic of the sucrose biosensor was also studied. Under optimum conditions, the current response had a linear relationship with the sucrose concentration in the range of 02 g/dL with a correlation coefficient of 0.9996 and a response time of < 30 s. The sucrose biosensor exhibited excellent diffusion and stability, and retained its sensitivity after 7 d of continuous use. This sucrose biosensor is expected to provide an effective and economical alternative for the quick and sensitive detection of sucrose in the food and beverage industries in the future. 電子鼻-Z傳感器生產(chǎn)商產(chǎn)品