Abstract:研究从土壤中筛选得到的黑曲霉ＡＳ００２３菌株所产的β－果糖转移酶的一些酶学性质。该酶的最适ｐＨ为５．０，最适温度为５０℃，有较好的热稳定性和较宽的ｐＨ（３．５～１０）适宜范围；并研究了１２种化学物质对酶活的影响和底物的特异性。结果显示，钴离子对该酶有一定的激活作用；底物分子越大其反应速度越慢。该酶的米氏常数Ｋ＿ｍ＝４７ｍｍｏｌ，葡萄糖是酶反应的竞争性抑制剂，其Ｋ＿ｉ＝３３０ｍｍｏｌ．当５０％（Ｗ／ｖ）蔗糖与酶在ｐＨ５．０和５０℃作用１６ｈ时，得到５２％（产物／总糖）低聚果糖。

Abstract:The equlibrium characteristics of ion exchange resin for lysine extraction was studied.The selectivity coefficients of resin for both mono and divalent form of lysine were determined.The effects of pH,temperature,concentration of lysine on the exchange ca

Abstract:A liquid paraffin as oil phase was added to penicillin fermentation process to increase medium oxygen transfer.Experimental results carried out in shake flasks and laboratory scale tanks with various oil fraction showed that with two percent of oil frac

Abstract:The physical and chemical properties of mung lean,sweet potato and otherstarches used fof starch-noodle making,as well as their relations with starch-noodle quality are studied.

Abstract:The relations between hydrophobic parameter of organic solvent and enzymatictransformation activity were tested in phospholipase D catalysis. The equation on relationship of enzgmatic catalgsis activity and hydrophobic parameter was established with the c

Abstract:For the first time,some bio-active substances with immunological enchancement function have been separated from corn silk.It has been further purified by ion-exchange,precipitation classify and Sepharose chromatography.The imitial result indicatesthat suc

Abstract:Physical modification of alcohol leaching soy protein concentrate(ALSPC)toincrease solubility was studied.It was found that,in ALSPC solution,all proteinmolecules are interalted with each other by noncovalent force,in modified ALSPC however,protein molecu

Abstract:A method for determination of protein content in pork by Ultraviolet absorptionSpectrophotometry is introduced.With accuracy,reproducibility and simplicity,there is noobvious difference compared to the Kjeldahl method determination.

Abstract:The modified temperature processor temperature processor mainly consists ofthe system microcomputer at acquire and processing multipoint temperature directly,and then print the current T. F values on the screen or printer. The system has some advantage,su

Abstract:he inertial vibrating fluid-bed dryer and the related parameter computingmethod are introduced.

Abstract:The mechannism and superiority of heat cutting by laser beam is analysed.The effect of laser parameters on cutting force and cutting temperature have been investigated.

Abstract:This artical introduces a method of locating the teeth and determining the teethshap when machining elliptic gears on NC WEDM machine tool,gives out a opinion aboutunstandard module which is somewhat better than standard module when machining elliptic gea

Abstract:研究了氧化－还原引发体系乳液聚合的工艺，确定了反应温度、时间、引发剂用量等参数。通过印花效果等性能测试，验证了ＭＦ为多功能粘合剂。

Abstract:追溯了古今中外的翻译理论的发展史，纵横论及了“文、质”论，“直译，意译”论以及“等值论”等的本质和历史意义，从而揭示了“翻译学”作为一门综合的新型学科的出现的历史根源和必然趋势。

Abstract:The reasons of individual saving-investment unbalancing and the related excitation methods are dixcussed, based on the existence of the tagnance mechanism.