Abstract:基于 pH 6.5的磷酸盐缓冲介质中铜对高碘酸钾氧化胭脂红褪色反应的催化作用 ,提出一种催化褪色光度法测定痕量铜的新方法 ,并研究了该方法的适宜反应条件 .该方法的Cu(Ⅱ )检出限为 1 .1× 1 0 - 7g/L ,线性范围为 1 0mL的比色管中Cu(Ⅱ )含量 0～ 0 .5μg .该方法用于粮食中痕量铜的测定时 ,结果较准确 .

Abstract:Structure and property of maltooligosaccharide product were analyzed and tested with IR. 13 C NMR and HPLC. The toxicological test was carried, and the results proved the safety of product.

Abstract:In this paper, the nonlinear optical properties of a series of N methoxy methy1 anline derivatives were studied. Ten different N methoxy methy1 anline derivatives were selected and synthesized. Their melting point and second order nonlinear optical

Abstract:This paper studied the calculating method of the spiral fluted tube's spinning force, which can provide basic theory for designing spinning shaping equipemnt, establishing spinning shaping technology and designing spinning tools. Using a set of spining c

Abstract:A solution for developing remote interactive animation is proposed in this paper. A server which has the function of script, security and resource sharing is implemented. By use of this server and specific library of ActiveX graphic control, ActiveX docum

Abstract:The wool fabrics of single warp siugle weft are rising.It must be sized.But to wet worsted yarn is diffecult. The effect of sizing is not doing well. After treating by hot water or pH4.5 acetic acid, it has a process of sizing , the significant improveme

Abstract:A methed of determining Young modulus of elasticity to a metallic cable by a dial gauge is introduced. The advantage of this methed is avoiding the expectation of the unmeasured variable. The precision of the measurement is higher than traditional optica

Abstract:运用化学诱变的手段 ,以亚硝基胍为诱变剂 ,以产甘油假丝酵母WL2 0 0 2 5为出发菌株 ,诱变获得 2 7株尿嘧啶缺陷型突变株 .并对所获菌株进行了传代稳定性试验和稳定性试验 ,其中 1# 、2 2 # 、2 3# 、2 5 # 、2 6 # 菌株稳定性优良 ,适宜作为进行酵母转化的带有遗传标记的工具菌株 .同时 ,从所获突变株中选出两株进行生长特性的研究和发酵性能的检测 .研究表明 ,缺陷型菌株的生长速度明显慢于亲株 ,但其产甘油的性状并没有较大的改变 .

Abstract:研究了Mn3 引发下 ,各工艺参数对淀粉丙烯腈接枝共聚反应的影响 .结果表明 :Mn3 配制中 ,Mn2 与Mn7 的摩尔比 (r)对接枝百分率 (G)和单体转化率 (CE)影响最显著 ,反应体系 pH值对接枝效率 (GE)影响最明显 ,而反应温度对它们的影响相对较小 .三者对G、CE和GE的影响均呈二次项关系 ,且它们相互间交互作用不大 .它们的最佳范围分别为 :Mn2 与Mn7 摩尔比为 4左右 ,pH为 1 .4左右 ,温度为 3 8℃左右 .另外 ,与原淀粉相比 ,氧化淀粉和酸解淀粉更易与丙烯腈起接枝共聚反应 ,而可溶性淀粉与丙烯腈反应效果最好 .

Abstract:研究了从黑曲霉AS0 0 2 3分离和纯化的果糖转移酶 (FTS)和转化酶 (INV)的酶学特性 .FTS专一催化果糖转移反应 ,INV专一催化水解反应 ;FTS和INV的最适 pH和温度分别是 5.8和 50℃ ,4 .4和 55℃ ;用 1mmol/L的Hg2 处理 ,FTS完全失活而INV仍维持 72 %的活性 ;这两种酶的酶动力学常数明显不同 ,以蔗糖为底物时 ,FTS和INV的Km 值分别为 4 4 .3 8mmol/L和 3 5.67mmol/L ;果糖是FTS和INV的竞争性抑制剂 ,其Ki 值分别为 3 5.4 4mmol/L和 1 0 5mmol/L ,而葡萄糖只是FTS的竞争性抑制剂 .

Abstract:The protection of oligo peptides with high fischer ratio from impairing of CCl 4 on rats was tested. The result has shown that oligo-peptides with high fischer ratio can effectively protect liver cells of rats and decrease the liver impairment from CCl

Abstract:采用溶胶 凝胶工艺在α Fe2 O3 K2 O复合体系中掺入SiO2 .XRD、BET比表面吸附、Archimede排水法等对α Fe2 O3 K2 O SiO2 陶瓷表征结果表明 ,适量掺杂SiO2 ,材料仍以刚玉结构的α Fe2 O3为主晶相 ,但抑制了主晶相晶粒粗化 ,增大了材料比表面积及孔隙率 .湿敏性能测试发现 ,掺杂摩尔分数 6%的SiO2 ,可获得全湿区范围内阻—湿特性曲线线性关系良好、灵敏度适中、湿滞小、稳定性较高的新型湿敏材料 .其中 ,K 被吸收分散在主晶相晶界硅玻璃相中是改善材料湿滞效应及性能稳定性的主要原因 .

Abstract:研究了圆弧青霉PG3 7碱性脂肪酶的发酵工艺条件 ,优化了PG3 7的摇瓶最适产酶条件 .其中 ,发酵培养基的组成为 (g/dL) :豆饼粉 3 .0 ,玉米浆 3 .0 ,磷酸氢二钾 1 .0 ,硫酸镁 0 .1 ,大豆磷脂0 .5,柠檬酸钠 0 .0 5,花生油 0 .2 ;发酵培养基起始 pH 7.5,发酵温度 (2 9± 1 )℃ ,摇床转速 2 50r/min ,发酵周期 96h ,发酵期间于 3 6,54,72h分别流加 0 .4 g/dL花生油 .在此条件下 ,PG3 7的脂肪酶产率为 2 0 60 μmol/ (min·mL) .PG3 7在 2 5L的实验室小罐中的产酶水平为 1 90 0 μmol/ (min·mL) .

Abstract:The influence of moisture upon consistence were investigated by using Brabender Farinograph. According equation B u(x)=(a 0 a 1e -bx )(1-e -cx ),the mathmatic model between moisture content and consistence was established.

Abstract:Several pickled vegetables (including Chinese cabbage ,radish, cucumber and lettuce ) were chosen for Se enrichment tests. The affecting curves on Se absorbing and converting ability in pickled radish have been obtained. The Se standard curve comparison b

Abstract:经SD品系的大白鼠试验证明 ,钙锌蛋白盐的生物利用率显著高于氨基酸配合物和无机盐 .蛋白盐能显著地提高股骨密度 (p <0 .0 5)以及股骨钙和血清钙含量 ,并能显著地提高血清锌含量 (p <0 .0 1 )以及股骨锌和脑锌含量 ,但氨基酸锌和无机锌的利用率差异不显著 ,说明小肽是一种比游离氨基酸更好的蛋白盐配体 .

Abstract:报道了油相在高度分散状态下的结晶特性 .应用超声波检测技术分别研究了降温和升温过程中体积分数为 2 0 %的O/W型乳状液中油相 (正十六烷 )粒子 (平均直径d32 =0 .3 6± 0 .0 2 μm)内部晶体的形成和熔化、在结晶点的晶体生长情况以及在高于结晶温度的情况下结晶粒子对未结晶粒子的诱导结晶等 .结果表明 ,与体相结晶相比 ,分散相的结晶需要更深的过冷程度 (数值取决于乳化剂类型和粒子大小 ) ;在结晶温度下 ,粒子内晶体的成核和生长过程与粒子间的相互作用关系不大 ;油相成分相同时 ,结晶了的粒子会诱使未结晶的粒子发生固化 .在乳状液体系中 ,完全液态的粒子的成核被认为是一种均相成核 ,而液固态粒子共存的体系的结晶有可能遵循一种异相成核机理 .

Abstract:The reaction flavor as the stabilized rice flavor enhancer, which is in initial stage at home, was made by studying the essence of forming aromatic rice scented and imitating ways to form process flavor in natural foods. The ultimate reaction conditions

Abstract:The composition of the industrial medium for Streptomyces coelicolor producing blue pigment was studied and optimized. After 8 days fermentation, the total blue pigment relatively yield of 265.2 U/mL was obtained. It is about 64% increasment compared with

Abstract:Approximately 1 700 Streptomyces strains isolated from 231 samples of soil and straw collected in 11 provinces in China were screened. The resulting zone of inhibition of melanin formation of Streptomyces sp. No.N39 24 in Streptomyces bikiniensis screeni

Abstract:A method suitable to prepare fibroin powder on a pilot plant scale was developed. Silk fibroin obtained from waste silk was refined in 0.5% sodium carbonate solution, then dissolved in 40% calcium chloride solution. The solution thus obtained was centrifu

Abstract:进行了β 环状糊精脱除鸡蛋中胆固醇工艺的研究 .在实验室规模进行了工艺参数的优化 ,以较低的环状糊精添加量 (1 5% ) ,获得较高的蛋黄中胆固醇的去除率 (85% ) ;同时保证低胆固醇蛋制品具原蛋黄的营养价值和功能性质 .在此基础上扩大试验规模 ,调整工艺参数 ,研制出适于工业化生产低胆固醇蛋制品的最佳工艺 .

Abstract:The influences of reaction media including water, heptane and 2 methyl 2 butanol as well as the kinds of lipase such as NOVO435, MML, LIPOLASE, PPL on the synthesize of L ascorbyl palmitate catalyzed by lipase has been investigated in detail. It is in

Abstract::研究了正丁醇、异丁醇、正戊醇在硝基乙烷—水体系中的界面吸附 ,测定了不同实验体系中的界面吸附参数 .结果表明 ,不同体系中界面张力与溶液醇浓度间的关系均遵守Langmuir Szyszkowski方程 ,硝基乙烷的存在改变了醇的界面吸附参数 ,降低了醇的表面活性 .

Abstract:Based on studies and comparison among the assay of the activity of alkaline lipase produced by Penicillium cyclopium PG37, a rapid, direct and sensitive solid agar plate method for the assay of the activity of alkaline lipase was developed. The underlying

Abstract:分析 8种担子菌纲真菌的蛋白质、脂肪、多糖、微量元素、矿物质、维生素质量分数和蛋白质的氨基酸组成 .结果表明 :8种真菌均含有较丰富的蛋白质 ,除金耳、猪苓外 ,其余的蛋白质质量分数均在 2 0 %以上 ,最高的达 3 8.84 % .脂肪的质量分数低 ,且变化不大 ,在 1 .4 4 %～ 3 .82 %之间 .氨基酸质量分数为 7.0 3 %～ 3 5.1 1 % ,均含有 8种人体必需氨基酸 ,且必需氨基酸占总氨基酸含量的 2 9.1 8%～ 50 .0 7% .真菌的多糖质量分数在 0 .4 8%～ 0 .87%之间 .8种真菌含有一定的微量元素和矿物质 ,其中灵芝、金针菇、竹荪、香菇和金耳分别含有较高的锗、锌、铬、钙和铁 .8种真菌含有大量的VB1、VB2 、VB6 、VB12 和VE .

Abstract:采用柱层析、气相色谱法和薄层层析法 ,研究了国内常见的几种番茄籽中油脂含量、脂肪酸组成和甘油酯的结构 .番茄籽油含油率为 2 0 %～ 2 3 % ,不饱和脂肪酸质量分数在 70 %以上 ,其中必需脂肪酸———亚油酸质量分数为 50 %以上 .番茄籽油是一种优质食用油 .

Abstract:用气相色谱法进行海洋鱼油β 环糊精包合物中主要有效成分EPA和DHA的定量分析 ,使之能够定量添加至奶粉中 .本研究的色谱分离效果好 ,实验回收率 97.67%～ 98.3 1 % ,变异系数0 .9%～ 2 .1 % .此外 ,探讨了在不同的包合条件下海洋鱼油和β 环糊精的包合情况 .