Abstract:A method with the efficiency of 10 4 per microgram of plasmid DNA for transformation of intact yeast cells with yeast E. coli shuttle vectors was established by treating intact cells with lithium acetate. The presence and the concentration of cassier DN

Abstract:The study into the influence of the composition of alcohol fermentation liquid on the pervaporation separation of silicalitho membrane was conducted. The results shown that the separation was improved by means of the production of some organic polymers du

Abstract:设计了小型玻璃连续发酵反应器，考察了甘油发酵的生产强度和转化率变化规律。结果表明：转化率随发酵时间的延长趋于一定值。对甘油发酵过程作碳源衡算，求得理论转化率ＹＰ＝１．５７；甘油浓度对发酵时间作图是一条“Ｓ”形曲线，生产强度随发酵时间有一峰值的变化。采用了高密发酵来提高发酵生产强度，结果表明：菌体浓度为１１％～１２％发酵液发酵６０ｈ甘油浓度达到１０８．９ｇ／Ｌ，生产强度为１．８１ｇ／（Ｌｈ），８０ｈ甘油浓度为１４２ｇ／Ｌ，生产强度为１．７７ｇ／（Ｌｈ）．发酵结束转化率达到５２％．

Abstract:通过ＤＳＣ分析，研究了不同含水量的大豆，尿酶及美拉德反应情况，发现水分高的大豆易变性，尿酶失活快于美拉德反应的产生，说明了有效赖氨酸在高水分时保持率较高的机理。控制大豆热处理工艺，使得尿酶活力降至０．４ｍｇ／（ｇｍｉｎ）以下，而大豆中有效赖氨酸的保持率为８０％．通过热处理工艺中温度、时间、水分等参数的分析，得出尿酶活力与有效赖氨酸、氮溶指数之间呈正相关（但非线性相关）；有效赖氨酸与尿酶活力与胰蛋白酶活力呈正相关。

Abstract:The solubility of riboflavin was greatly influenced by pH. The solubility of riboflavin has quite low in acidic solution while that has high in alkaline solution. The stability of riboflavin was deeply affected by the factors such as temperature,pH, tim

Abstract:In this paper a method of producing trehalose from yeasts was proposed. The optimum extracting conditions were obtained, which include temperature,alcohol concentrtion and extracting time. The extract was decolored and desalted by using anion and cation

Abstract:The method of sensory evaluation of "scented" rice based on fuzzy mathematice was developed and then examined by with the technique of GC MS. It becomes one of main methods studyimg on rice flavor.

Abstract:从黄色短杆菌（Ｂｒｅｖｉｂａｃｔｅｒｉｕｍｆｌａｖｕｍ）ＡＴＣＣ１４０６７出发，选育获得一株Ｌ－异亮氨酸高产菌ＺＱ－４．试验结果证明，生物素是ＺＱ－４菌株唯一必需生长因子，生物素或玉米浆用量分别为５０μｇ／Ｌ和２０ｍＬ／Ｌ时可得到较高的产酸率。为了获得较高的Ｌ－异亮氨酸积累量，培养基中葡萄糖质量浓度为１４０ｇ／Ｌ，硫酸铵用量为４０ｇ／Ｌ时较为适宜；以适当的摇瓶装液量改善通风状况可明显提高产酸率。在适宜的发酵条件下，ＺＱ－４经摇瓶发酵培养３ｄ，Ｌ－异亮氨酸积累量可达２８～３０ｇ／Ｌ．

Abstract:The purpose of this research is to study a lipase Candida lipolitical lipase (CLL) which is to be used in the synthesis of long chain fatty acid ester. A fundamental study on the kinetics of the esterification of butanol with lauric acid, catalyzed by C

Abstract:This paper describes an actone powder method for the extraction of polyphenol from blueberry fruits. The enzyme was further purified by using ammonium sulfate fractionation and hydrophobic chromatography on Phenylsepharose CL4B. To find the best method, d

Abstract:在竹叶及其提取物中检出了一种特殊的非蛋白氨基酸δ－ＯＨ－Ｌｙｓ，为了解其生物学意义，用化学发光法和电子自旋共振法（ＥＳＲ）对δ－ＯＨ－Ｌｙｓ和Ｌｙｓ清除超氧阴离子自由基（Ｏ２－）的能力作了比较，结果表明赖氨酸在δ位羟化以后，抗活性氧自由基的活性有了显著提高。

Abstract:研究了竹叶多糖对小鼠移植瘤的抑制作用。实验结果表明，竹叶多糖对动物移植性Ｓ１８０肿瘤有抑制作用，抑制率可达５０％．５０％～７０％醇沉组分抑瘤活性最大，且能显著提高小鼠腹腔巨噬细胞的吞噬能力。

Abstract:利用ＴｉＯ２在Ｈ２Ｏ２中的溶解性，在玻璃表面形成ＴｉＯ２薄膜，制作了新型环状光催化型反应器。以２，４－二硝基苯酚为典型有机化合物，进行了降解的条件研究，并测试了反应器性能。分别考察了催化剂涂层载体、光源、搅拌以及流速对２，４－二硝基苯酚光降解的效率。结果表明：石英玻璃为最理想的光催化剂载体；水银灯对２，４－二硝基苯酚的降解速度最快，是理想的光源；搅拌能够提高反应器效率；采用适宜的流速（４５ｍｌ／ｍｉｎ）可使反应器效率达到理想值。在反应动力学研究中，２，４－二硝基苯酚的最大降解速率为Ｋｄｍａｘ＝０．３６ｍｇ／（Ｌｍｉｎ），最终的降解率达到９９．５％．

Abstract:UV curable epoxy acrylate(EA) has been synthesized by the reaction of epoxy resin and acrylic acid. The effects of inhibitors, temperature , catalysts on the reation have been discussed. By IR spectra, the UV curing kinetics were also studied.With the

Abstract:Tomato seed oil was extracted by either traditional method with solvent or supercritical fluid CO 2 extraction(SFE). GC analysis showed there were five fatty acids including oleinic acid in tomato seed oil, composing 95% of total fatty acids. The resu

Abstract:Two methods were developed for qualitative and quantitative analysis of IMP and GMP in condiments and their raw materials by reversed phase(on the C 18 column) and normal phase(on the NH 2 column) high performance liquid chromatography. The techni

Abstract:研究了新显色剂二溴对甲基偶氮甲磺（ＤＢＭ－ＭＳＡ）与铅的显色反应。在０．２４ｍｏｌ／Ｌ的磷酸介质中，铅与ＤＢＭ－ＭＳＡ形成稳定的蓝色配合物，其组成比为铅ＤＢＭ－ＭＡＳ＝１２，λｍａｘ＝６４２ｎｍ，ε＝９．５×１０４Ｌ／（ｍｏｌｃｍ）．铅在０～０．６μｇ／ｍＬ范围内符合比耳定律，测定０．４μｇ／ｍＬ时大多数金属离子的允许量在毫克量级。用于食品中微量铅的测定，结果令人满意。

Abstract:对测定糖化酶中葡萄糖苷转移酶（转苷酶）酶活的方法进行了研究。采用α－ＭＧ为底物，用ｋｎｉｇｈｔ－Ａｌｅｎ法测定转苷酶催化α－ＭＧ分解产生的葡萄糖，计算得转苷酶酶活值。通过条件试验，找到了底物浓度、碱性铜试剂用量、加热时间、滴定剂浓度等的最佳范围。并测定了３×１０４，５×１０４，６×１０４μｍｏｌ／ｍｉｎ糖化酶粉剂和发酵液中的转苷酶活性，做了酶法、光度法与该方法的对比试验。

Abstract:研究了Ｍｅｓｏ－四－（３，５－二溴－４－羟基苯）卟啉［Ｔ（ＤＢＨＰ）Ｐ］与铅的显色反应，建立了一种测定食品包装材料铅污染的分析方法。在０．０８ｍｏｌ／ＬＮａＯＨ介质中，铅与Ｍｅｓｏ－四－（３，５－二溴－４－羟基苯）卟啉形成１２黄色配合物，最大吸收波长为４７９ｎｍ，表观摩尔吸光系数为２．２×１０５．研究表明，体系中加入８－羟基喹啉和盐酸羟胺，既加快了显色反应速度，在常温下放置５ｍｉｎ即可完成，又大大提高测定铅的选择性，能满足复杂体系中痕量铅的测定。

Abstract:Based on experiments, the performance of series WM104 mechanical seals was studied and the power consumption ,face friction condition, leakage and face width affecting seal performance were analyzed. Some suggestions for improving their performance were p

Abstract:In this paper, we present a heated electrical intensity test meter controlled by the single chip computer MCS51, and describe the principle of the 90 degree phase transfering method and the LEM module. The hardware schematics of the system are implemen

Abstract:In the paper,we outlin Online Transaction Process (OLTP) theory and the technology, Securities firm's Network system (one of a true OLTP system) is discussed in detail. We also analyze SYSprocess and OLTPprocess,in order to bring about OLTP model design.