Abstract:Candida glycerolgenesis Zhuge is characterized by its osmotolerance and over production of glycerol. A 120 hours' fermentation was processed and ctGPD was found to maintain at a quite high and steady level. Two peaks of activity appeared at the moments

Abstract:以圆弧青霉白色变株ＰＢ２２７ 为出发株⒙通过多次诱变⒙筛选抗真菌抗生素的抗性株和抗底物、底物结构类似物或分解产物的抗性株⒙获得一株己酸抗性突变株ＰＧ３７⒙其产酶水平比出发株ＰＢ２２７ 菌株提高了１．５ 倍⒙达到５５７ μｍ ｏｌ／⒉ｍ ｉｎ·ｍ Ｌ⒕．ＰＧ３７ 所产脂肪酶的最适作用ｐＨ 为１０．０⒙最适作用温度为２５ ℃⒙在ｐＨ ７．０～１０．５ 范围内稳定．

Abstract:

Abstract:∶研究了Ｓｔｒｅｐｔｏｃｏｃｃｕｓｚｏｏｅｐｉｄｅｍ ｉｃｓＨ２３ 摇瓶发酵生产透明质酸的条件，并对发酵机制进行了初步探讨．研究发现，Ｈ２３ 在通风和厌氧条件下都能生产透明质酸．透明质酸的合成和菌体生长是偶联的，对不同的碳源质量浓度显示出不同的规律．酵母膏、葡萄糖是合适的氮源和碳源，初始质量浓度应分别为２ ｇ／ｄＬ、４ ｇ／ｄＬ． Ｍｇ２＋ 对发酵有很大的影响，ＭｇＳＯ４·７Ｈ２Ｏ 最佳质量浓度为０．２ ｇ／ｄＬ． 摇瓶条件如温度、通风等也影响透明质酸的形成，温度３３ ℃，摇瓶装液量４０ ｍ Ｌ时最有利于透明质酸合成．在较适合的条件下，透明质酸产量可以达到０．４７ ｇ／Ｌ，产物对碳源的转化率为２．１％ ．

Abstract:对一株从土壤中筛选出来的产蓝色素的放线菌进行了初步鉴定， 命名为天蓝色链霉菌－１００（Ｓｔｒｅｐｔｏｍ ｙｃｅｓ ｃｏｅｌｉｃｏｌｏｒ－１００ ），并对蓝色素的性质进行了研究．结果表明此色素无臭无味，水溶性较强．酸性条件下，溶解度随ｐＨ 降低而减小．ｐＨ＜ ８ 时为红色，ｐＨ≥８ 时为蓝色，颜色随ｐＨ 增大而加深．于１００ ℃短时间处理，比较稳定．在ｐＨ 中性的条件下对光（包括紫外光）较稳定．大多数金属离子如Ｂａ２＋ 、Ｋ＋ 等对此色素无影响，Ｍｇ２＋ 使色素增色．Ｆｅ２＋ 在５×１０－４ ｍ ｏｌ／Ｌ时，使色素变性，但在５×１０－５ ｍ ｏｌ／Ｌ时，对色素没有多大影响．Ｐｂ２＋ 可以络合色素，使之沉淀；加入０．２５％ 盐酸乙醇后，色素再溶解．该蓝色素可作为天然色素或天然ｐＨ 指示剂开发．

Abstract:The content of glutathione in the intracells and extracells of three spiecies of baker's yeast were determined respectively.The effect of glutathione on the rheological properties of dough were investigated.It was found that those effects were mainly depe

Abstract:Glycine and glycine peptides and their complexes with zinc(II) and copper(II) have been studied by pH potentiometic method. The stability constants for complexes were determined and the results showed that coordination existed in metal complexes of diglyc

Abstract:在摇瓶条件下， 以淀粉为碳源，蛋白胨及酵母膏为氮源，对Ｓｔｒｅｐｔｏｖｅｒｔｉｃｉｌｌｉｕｍｍ ｏｂａｒａｅｎｓｅ生产谷氨酰胺转胺酶（ＭＴＧ）的摇瓶发酵条件进行了探索．研究结果表明，发酵法生产谷氨酰转胺酶的适宜初始ｐＨ 值、淀粉质量浓度、接种量分别为６．１，２ ｇ／ｄＬ，１０％ ；ＭＴＧ酶活最高可达１．８３ ｕｍ ｏｌ／（ｍ ｉｎ·ｍ Ｌ）．初始加入硫酸铵对菌体生长影响不大，但对ＭＴＧ 的合成却产生抑制作用；初始加入纯氨基酸及胱氨酸母液不利于ＭＴＧ 酶活的提高．

Abstract:A total of 267 strains of osmotolerant yeasts were isolated from flowers, fruits, soil and honey. A survey of these osmotolerant yeasts showed that glycerol, erythritol and arabitol were produced by 206 strains. The growth curves of 62 strains of polyol

Abstract:Rice bran is of high nutrition and broad development prospects.The technological process without environmental and chemical pollution could completely transform stabilized rice bran into natural soluble rice bran nutrient(SRBN)and rice bran nutritive fibe

Abstract:A method of dilute alkali-enzyme hydrolysis to extract chondroitin sulfate from the shark cartilage was presented.Several methods to examine the chondriotin sulfate were also discussed,a certain range of temperature,acid concentration,the amount of enzyme

Abstract:∶建立了灵芝深层发酵过程中胞外多糖质量浓度和发酵上清液相对粘度之间关系的数学模型，从而找到了一种通过测定发酵过程中上清液相对粘度来检测胞外多糖含量的方法．模型具有较好的拟合性，平均相对误差在４．４％ 左右．

Abstract:strains of Monascus for the production of Monacolin K were studied and were cultivated in solid fermentation on selected substrates. Samples of the fermented rice were examined by TLC for the first screening,8 strains were possible to produce Monacolin K

Abstract:In this paper the degree of substitute of starch ester phosphates was determined by phosphomoly adic acidquinoline volumetry and spectrophoto metric method.it was found that the former is less than the later in precision and reapearance. By spectrophoto

Abstract:In this paper, the procedure and condition (for example, the dosage of DNS reagent, heating time, dissolving oxygen and ionic strength) on the measurement of reducing sugar were studied.Results show that the choice of measuring wavelength was affected by

Abstract:Based on laboratorial experiments, the essential oil of lime was extracted from the peel by solution extraction, and separated into fractions of hydrocarbon and oxygenated compound through a silicagel column. Both fractions were analyzed by combined capol

Abstract:应用拟二元体系方法将非理想二元混合表面活性剂体系的吸附理论推广到非理想三元体系并建立了三元体系的表面张力方程．由此对含有３个组分的多元体系，根据各单一表面活性剂体系的γ－ ｌｇＣ曲线和所有两组分间的相互作用参数βｓｉｊ（ｉ＝ １．２．３？ｊ＝ １．２．３？ｉ≠ｊ ）即可预测达到给定表面张力下降所需的不同体相组成的混合体系的浓度和混合吸附单层的组成，或者应用所建表面张力方程预测混合物溶液的表面张力．应用于ＡＥＳ／ＡＥＯ９／ＤＰＣｌ＋ ０．１ ｍ ｏｌ／Ｌ ＮａＣｌ非理想三元混合体系，理论预测结果与实验结果一致．

Abstract:In this paper,the second order nonlinear optical polarizabilities of a series of N methoxy methyl anline derivatives have been calculated.Using the CNDO/S CI quantum chemical calculation program,the structure dependence of their nonlinear optical pr

Abstract:（１Ｓ，２Ｒ）－１－二丁氨基－１，２－二氢－２－茚醇（ＲＯＨ）与氢化铝锂形成的手性试剂首次用于苯乙酮的不对称还原研究．根据手性试剂制备后的使用方法（方法Ａ∶立即使用；方法Ｂ∶回流１０ ｍ ｉｎ 后使用），苯乙酮还原后可分别给出对映体过量值达６０％ ～７６％ 的不同主产物Ｒ－（＋ ）－１－苯基乙醇和Ｓ－（－）－１－苯基乙醇．研究了反应物物质的量之比（ＬｉＡｌＨ４ ｖＲＯＨｖＰｈＣＯＭｅ）对立体选择性的影响，当反应物物质的量之比为１．０ｖ１．５０ｖ１．５０时有较高的对映体过量值和转化率．这种手性还原剂为不对称合成光学活性醇提供了一种选择．

Abstract:The scheme of the measurement system of CCD is presented in this paper.A new optical is proposed,which uses background illumination,parallel light to project on the workpiece,high speed rotating mirror as an optical compensation,and a CCD camera as a phot

Abstract:In this paper,the forming process of the rough surface for printed ink was described. The rough layer of the printed ink was taken as the random transparency screen,and the effect of the rough layer for the printing quality was studied with the optical in

Abstract:In this paper, the mechanism of soi geotextile interaction has been studied in three aspects:friction features for interface of soil and geotexties, pullout tests of soil geotextile interaction,triaxial compression tests for the stress strain relation