Abstract:对产聚唾液酸菌株大肠杆菌WX J11进行6 0 Co诱变 ,筛选出高产突变株WX J4 ,其聚唾液酸产量可达 10 0 1mg/L ,通过优化发酵条件即在 2 50mL的摇瓶中 ,2 50r/min转速下 ,37℃恒温培养 6 5h ,起始 pH值为 7.8,装液量为 4 0mL ,使聚唾液酸的产量提高到 150 0mg/L .聚唾液酸在菌体生长停止后释放到培养基中 ,动力学上表现为次级代谢产物 .此外 ,还对聚唾液酸的提取、水解和唾液酸的纯化作了初步研究 .

Abstract:A anti crease finishing method for silk/wool blended yarn fabric has been developed by using fibroin and chitosan. The finished fabric achieves satisfactory hand touch, hygroscopicity and permeability, with its whiteness remaining unchanged. It had been

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Abstract:After the oral administration of a large amount of Bifidobacterium bifidum for a long time to the mice, significant amounts of anti-B.bifidum antibody were detected in the serum. However, the antibody in the mice administrated with Salmonella sp. were de

Abstract:研究了谷氨酸菌体中核酸提取的工艺条件 ,获得了较好效果 .在 12 0℃ ,pH 9,菌体质量浓度 10 g/dL的条件下 ,提取 2h ,蛋白质的分离率为 90 % ,核酸的提取率高达 90 %以上 .

Abstract:以卵黄高磷蛋白质为原料 ,经碱法脱磷、胰蛋白酶水解后分离制备得到一种新型的卵黄高磷蛋白磷酸肽 (PPP) .卵黄高磷蛋白质经 0 .1,0 .2 ,0 .3,0 .4mol/LNaOH处理 3h ,脱磷率分别为34.6 % ,81.6 % ,92 .5% ,96 .3% .SDS PAGE电泳结果显示 ,脱磷卵黄高磷蛋白质经胰蛋白酶水解后 ,产物为小分子肽 .经BaCl2 法和超滤法分离得到的磷酸肽的平均氨基酸残基数分别为 10个与2 0个 .对PPP的钙结合能力进行了研究并同商品化酪蛋白磷酸肽 (CPP)进行了比较 .PPP能有效地与钙络合 ,因而它在功能食品中有着较好的应用前景 .

Abstract:The effects of different pH values on cell growth and microbial transglutaminase(MTG) production were investigated, and the effects of the initial starch concentration and carbon source feeding on the process of MTG fermentation were discussed. The result

Abstract:对灰树花深层发酵菌丝体多糖的酶法提取工艺及其抗肿瘤作用进行了研究 .结果表明 :利用复合酶法处理并结合热水浸提 ,缩短了提取时间 ,且能显著提高多糖的提取率 ,多糖提取率达7.4 % ,效果优于其他浸提方法 .动物体内实验证明 ,腹腔注射菌丝体多糖对小鼠移植性肿瘤S180有明显的抑制作用 ,抑制率达 57.6 %～ 6 6 .7% .

Abstract:确立了玉米芯经稀酸预处理后加水蒸煮提取木聚糖 ,然后再加酶水解提取液的生产低聚木糖的工艺路线 .玉米芯在质量分数为 0 .1%的H2 SO4 溶液中于 6 0℃下浸泡 12h后 ,滤去浸泡液并水洗至 pH 6左右 ,然后采用液固比 10∶1,150℃ ,30min的蒸煮条件进行蒸煮 .结果表明 ,可溶性木聚糖的提取得率达 17% (按玉米芯计 ) ,提取液的RS/TS小于 33% .提取液和渣一起用木聚糖酶进行水解 ,可获得阿拉伯糖 /葡萄糖 /木糖 /木二糖 /木三糖之比为 7.7∶6 .8∶11.5∶54.1∶19.8的高纯度低聚木糖产品 .低聚木糖的质量分数大于 70 % (对总糖 ) ,且产品的可溶性总糖得率达2 6 .4 % (对玉米芯 ) .

Abstract:从优质自然发酵猕猴桃汁中分离筛选到一株产香酵母E 36 ,经鉴定为膜醭假丝酵母Can didapelliculosa .研究了该菌在麦芽汁中的生长特性 ,发现其最适生长温度为 32℃ ,最低和最高生长温度分别为 9℃和 4 1.5℃ ;最适生长 pH为 5.4 ,最低和最高生长 pH分别为 2 .0和 12 .0 .

Abstract:对叔戊醇中酶法合成L 抗坏血酸棕榈酸酯 (L AP)的反应动力学进行了研究 ,对影响其反应动力学的因素 (转速、温度、水分活度、酶质量分数和底物浓度 )进行了探讨 ,确定了最有效的酶促反应环境 .即转速为 2 0 0r/min ,温度为 55℃ ,水分活度为 0 ,加酶量为 2 0 % .并对底物进行了比较 ,得到了对酶亲和力最大的底物———棕榈酸甲酯 .

Abstract:Biodegradable package films with good water resistance and oil-resistance were prepared in this paper. The effects of some parameters on tensile strength, puncture strength and water solubility of the films were studied in details.

Abstract:Several Monascus strains with low citrinin production ability were screened. The citrinin contents in liquid (shaking flasks) and solid state cultivation (red rice) by some selected Monascus strains were determined. The pigments and citrinin production pr

Abstract:研究了以AOT(二 (2 乙基已基 )琥珀酸酯磺酸钠 ) /正庚烷 /水 /明胶组成的反相微乳凝胶固定化脂肪酶 ,在有机溶剂中催化棕榈酸和十六醇的酯化反应 .反应在 2 5℃下进行 ,固定化脂肪酶重复使用 16次后 ,平衡转化率仍可达 90 % .反应既可用釜式反应器又适用柱式反应器 .产物通过冷却的反应液后沉淀析出 ,回收率可达 6 5% ,产品纯度高 .

Abstract:The interaction between photosensitive diazoresine and SDS /SDBS in aqueous solutions was studied by UV spectrum. The result is confirmed that the dissolubility of diazoresine has relation to the consistency of SDS/SDBS. It is discovered that the photode

Abstract:The unperturbed dimension and extension factor of a block copolymer comprise of liquid crystalline polyester and poly(ethylene glycol) were calculated by molecular structure parameter, then the domanin size of liquid crystalline block copolymer was calcul

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Abstract:In the paper, the theoretical relationship between the weave and weight from the point of structural phrase was discussed. It is concluded that weave was the important factor affecting the weave. Moreover, The orthogonal test to weave the different heavy

Abstract:By considering vibration effects of gear transmisssion system, compressibility of Lubricant and transient effect of sliding velocity, curvature varying with time and coordinate, the elasto hydrodynamic lubrication analysis on spur gears was given. The ce

Abstract:Tests have been conducted for oil/water separation using hydrocyclones. The effects of geometric, operating and feed parameters on oil/water separation efficiency have been researched respectively through single factor experiments by varying overflow dia

Abstract:This paper mainly analyses the factors and causes of multi color registration errors caused during Multi Color Web Press Printing(MCWP),and suggests that the slack or over tight web tension of the web is one of the most important factors which lead to

Abstract:In this paper, the effect of several factors, such as ambient light and channel interaction, on chromaticity prediction of color CRT monitors was discussed. A completely precise method of formulary chromaticity prediction was proposed.

Abstract:The system of cotton blending optimization is an intelligent information management and quality control software, based on the raw material management of cotton,focusing on cotton blending and the control of yarn quality prediction. It consists of c

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Abstract:The hardware and software design of the watching system which was controlled by single_chip_microcomputer either manually or remotely was introduced. The technology that a remote_controller can control some watchers was also introduced.

Abstract:As the high frequency converting technology is applied in some new dimmable electronic lighting system, the previous leading edge phase control dimmer can not adapt to these new systems. A trailing edge phase control dimmer has been developed successfully

Abstract:In this paper, the uncertainty of measurement and its mathematical method, which are newly presented internationally, were briefly interpreted. The differences between uncertainty of measurement and error of measurement were clarified. And the causes why

Abstract:Structure design is the key of dress modelling. It separates the solid dress into plane pieces of cloth, which shows the combination of the whole and the detials according pattern sketch of dress.The method of analysis by table in structure design can cle

Abstract:In this article, the tripartite signification for the inner space of the clothing the connections of the inner space and the conformation was analyzed. It compares the differences in the concepts of the stereo clothing and the plane clothing, and points

Abstract:In this article,the concepts of fabric sheen and sheen sense were discussed and subjective and objective evaluation of fabric sheen was introduced. A systematic analysis was made about the influence of fabric sheen from fibre form, yarn and fabric structu