Abstract:以海藻酸钙为载体包埋黑曲霉AS0 0 2 3孢子 ,培养后得到固定化增殖细胞 .将此固定化增殖细胞填入填充床反应器中以用于连续化生产低聚果糖 .研究了连续操作时的最佳工艺参数 .结果表明 ,在D 3 .5cm× 50cm的小型夹套层析柱上 ,最佳操作参数为 pH 6.5,50℃ ,体积流量 1 .3mL/min ;扩大到D 5.5cm× 1 0 0cm中型填充床反应器中 ,确定其最佳操作参数为 pH 6.5,50℃ ,体积流量 6.0mL/min ;在此条件下所得产品中低聚果糖质量分数达 53 % ,并且连续反应 1 7d低聚果糖质量分数保持在 50 %以上 .

Abstract:The spores of Aspergillus niger AS0023 were entrapped in calcium alginate gels for growth to form immobilized growth cells which were used for the production of fructooligosaccharides(FOS).The effect of polyethyleinimine(PEI) on the gel strength of immob

Abstract:对经疏水层析 (PhenylSepharoseCL 4L)和阴离子交换层析 (DEAE FastFlow)等部分纯化的样品 ,采用制备型聚丙烯酰胺凝胶电泳进一步将其分离纯化 ,获得了PG3 7碱性脂肪酶的 3种同工酶LipaseⅠ、LipaseⅡ和LipaseⅢ .用SDS 聚丙烯酰胺凝胶电泳和SephadexG 1 50凝胶色谱法分别测得同工酶的相对分子质量为 2 750 0和 2 90 0 0 .测定了LipaseⅠ的等电点为 5.4 ,动力学常数Km 和Vmax分别为 4 .54g/dL和 5.56μmol/ (min·μg) .

Abstract:The effects of alcohol on the physical and interfacial properties of sodium caseinate solutions and caseinate emulsified O/W emulsions were investigated. The results indicate that as the increase of alcohol, the solubility of sodium caseinate in water

Abstract:采用自溶法、自溶 酶解法、诱导剂 自溶 酶解法对S .CerevisiaeYJ酵母细胞进行生物处理使其释放蛋白质及其分解产物 .对反应产物α 氨基氮和细胞蛋白质溶出率及细胞干基提取率的测定结果表明 :诱导剂 自溶 酶解法的作用效果明显优于自溶 酶解法及自溶法 .诱导剂 自溶 酶解法比自溶 酶解法及自溶法的反应产物中游离α 氨基氮分别提高了 9.0mg/g及2 3 .0mg/g(以干酵母计 ) ,细胞蛋白质溶出率分别提高了 1 3 .50 %及 2 9.83 % ,细胞干基提取率分别提高了 7.0 %及 2 0 .90 % .

Abstract:The kinetics of batch fermentation with mannosylerythitol lipid(MEL) produced from soybean oil by Candida antarctica was studied in a 2 L fermentator. The experiment was conducted to find the effect of different triacylglycerols acting as carbon source o

Abstract:通过试验分析了不同成熟度的巨峰葡萄在冰温高湿保鲜过程中的生化变化 ,探讨了葡萄在保鲜过程中可溶性固形物含量、还原糖含量、酸含量、呼吸强度的变化及抗压强度的变化规律 ,并试验了出库的方法 .试验结果显示 ,在 60d的冰温高湿保鲜过程中 ,成熟度为 7～ 8成的巨峰葡萄的各种变化很小 .经感观评定 ,其口感和风味与新鲜葡萄相比均无明显差异 .

Abstract:Copper(II) complexes of glycine , diglycine and triglycine had been studied by spectroscopic analysis. The results showed that coordination existed in copper complexes of diglycine and triglycine were quite similar, which differed from that in copper glyc

Abstract:在 2 0℃条件下 ,采用相对饱和度为 50 %的 (NH4) 2 SO4一步盐析并经 4 5～ 50℃烘干 1 0h得到木聚糖酶粗酶粉 .初步研究了该酶的一些基本性质 ,结果表明 ,该酶在 55℃下 ,pH值为 4 .6～1 0 .5之间较稳定 .最适作用温度与 pH值分别为 50℃和 7.6.该粗酶产品适合造纸工业的纸浆处理 .

Abstract:The natural red pigment was extracted from callus of Chenopodium amaranticolor. The effects of physical and chemical factors (such as light, temperature, pH, metal ions, oxidants and reductants) on the stability of the pigment were discussed.The action of

Abstract:Out of 33 soil samples collected around africa (CANEROON and GHANA), a potent bacterium for lipase production (strain H 1) was isolated and identified as Pseudomonas species. Strain H 1, was then treated by ultraviolet (UV) irradiation and nitrosoguanid

Abstract:The swelling ability of soy protein isolates (SPI) and concentrates (SPC) was studied as a function of protein interaction and molecule aggregation. The activating energy of dissolving protein in water, which give a measure of the molecular interaction, w

Abstract:利用人工栽培的姬松茸子实体干品 ,经热水提取 ,乙醇沉淀 ,蛋白酶法和Sevag法相结合去蛋白 ,H2 O2 脱色 ,DEAE SephadexA 2 5和SephadexG 2 0 0柱纯化 ,得到姬松茸蛋白聚糖AP 1 .葡聚糖凝胶柱层析分析表明 ,该蛋白聚糖为均一物质 ,相对分子质量为 1 2 4 0 0 0 .紫外扫描表明有核酸和蛋白质的特征吸收峰 .红外扫描显示有典型的多糖吸收峰 .纸层析和气相色谱分析表明 ,其单糖组成为葡萄糖、甘露糖、半乳糖以及核糖 ,其物质的量之比 (摩尔比 )为 1 .1 9∶0 .56∶0 .4 3∶0 .54.

Abstract:采用国内α 淀粉酶生产常用菌株BF7658变异菌种 ,直接以麸皮为原料固态发酵法生产α 淀粉酶 ,得到较适宜的条件为 :培养基初始含水量 (质量分数 )为 60 % ,起始 pH自然 ,液体接种量为 5mL/kg ,3 7～ 3 9℃培养 4 8～ 60h ,三角瓶培养产酶水平可达 1 2 4 8U/ g ,浅盘培养平均产酶可达 1754U/ g .固态发酵生产细菌α 淀粉酶产酶水平为液体深层发酵法的 4～ 5倍 ,并且成本低廉 ,具有较好的经济和环境效益 .

Abstract:对中国各地收集到的数十个红曲米样品中的桔霉素进行了定性及定量测定 ,测定结果表明 ,除少数几个红曲米样品中未测出桔霉素外 ,其它红曲米样品都测出桔霉素 ,红曲红产品中也发现含有桔霉素 .用酵母膏蔗糖培养基 (能检测霉菌是否产生真菌毒素 )培养了近 4 0株红曲霉 ,从菌落形态特征看 ,大多数是Moanascusanka ,定性检测结果表明 ,大多数菌株的培养液中都检测出桔霉素 ,说明这些红曲菌种本身具有产生桔霉素的能力 .初步总结了定性和定量测定高色价红曲米中桔霉素的方法 .

Abstract:报道了一种鱼油乳液的制取工艺 ,采用混合乳化剂和乳粉可制得乳化稳定性较好的鱼油乳液 .考察了β CD和茶多酚对抑制鱼油腥味及提高鱼油乳化液氧化稳定性的效果

Abstract:采用差示量热扫描方法研究米粉糊在低温贮存时的老化情况 ,比较了不同水分含量 (质量分数 )和添加剂对米粉糊抗老化能力的影响 .结果显示 :米粉糊在 4℃下贮存较在 2 5℃下贮存易于老化 .在米粉糊中添加 1 .0 %的蔗糖酯和 1 .0 %的CaCl2 能有效地提高米粉糊在贮存期间的抗老化性能 .

Abstract:A quantitative method for erythritol was developed by periodate oxidation, which allowed the easy and rapid analysis of erythritol of the fermentation supernatant. The accuracy test and recovery test showed that the method was accurate and reliable.

Abstract:Liquid chromatography electrospray ionization mass spectrometry(LC ESIMS) was applied to characterize the limonoid glucosides in ethanol extract of seeds of Citrus sinensis Osbeck. The results show that LC ESIMS can directly determine the presence of l

Abstract:Force feed trials were conducted to estimate the metabolism energy and true digestibility of amino acids of extruded castor seed meal(ECM) for chick. And then, two performance trials were conducted to estimate the feed value of ECM for broiler chicken

Abstract:By studying the effects on the coupling reaction yield of the reactant concentration,the quality of N,N dicyanoethylaniline,and the temperature in previous diazotization reaction,the yield of disperse yellow brown S 3RFL is increased.

Abstract:The paper shows the flexibility,operationility and advantagility of internal rate of return on the estimate of investment program with the data and graphic in details.

Abstract:以薄荷原油为原料 ,借助超临界CO2 萃取技术对其中薄荷醇进行提纯 .实验结果表明 ,较好的萃取参数压力为 :9.0～ 9.5MPa、温度 3 5～ 4 5℃ .提高薄荷醇纯度 ,可缩短通过冷冻结晶提取薄荷醇的时间 .

Abstract:采用硝酸镍作为石墨炉原子吸收法测定食品中痕量铅时的助灰剂和基体改良剂 ,并以食品标准物质为样品对该方法进行了考察 .实验表明 ,硝酸镍能很好地增加铅的热稳定性 ,使样品干法灰化预处理的过程简单、快速 ,测定的线性范围在 0～ 1 0 0ng/mL之间 ,方法的准确度和精密度均较理想 .

Abstract:利用拟群建立了一类新的特殊环———拟环 ,讨论其特征与结构 ,得出了相关于拟群的一系列结论 .