Abstract:用离子色谱法建立一种简单、快速、准确、灵敏的半乳糖醛酸和葡萄糖醛酸的测定方法。多糖水解液经过简单的中和、稀释、过滤后直接进样分析，半乳糖醛酸和葡萄糖醛酸具有较高的分离度（R=4.2）；两者在20～200mg／L质量浓度范围内都具有良好的线性，其相关系数均为r=0.9990；重复性和回收率都满足了仪器分析要求；两种化合物的检测限分别为100ng和50ng．

Abstract:Vaccinium bracteatum Thunb., a resource of Chinese traditional medicine, belongs to the genus Rhododendron. It is grown massively in China and also can be found worldwide. Its functions were recorded in some thesaurus of Chinese traditional medicine. The

Abstract:In this study, aerobic moving bed biofilm reactor (MBBR), fed with domestic wastewater, was used to investigate the influence of inoculated sludge concentration on biofilm development, and the change of microbial community. The results showed that there w

Abstract:Synthesis of vanillin from guaiacol and glyoxylic acid was investigated. The effects of temperature, proportion of reactant, catalyst, and pressure on the yields of the resulting mandelic acid to the corresponding phenylgyoxylic acid were studied. High se

Abstract:Based on the mechanism of PVA reacted with I_(2), the screening principles of PVA-degrading enzyme producing microorganisms were determined. Based on these principles, 53 microbes were screened from samples collected at Wuxi, Shanghai and Guiyang. The cel

Abstract:Protein processing is one of the fastest growing sectors in food industry. The majorities of the enzymes applied to this field are proteases, which can be used for protein extracting or modification. With soy isolating protein, rice protein and gluten pro

Abstract:Sixty experimental Jinhua hams were processed based on a traditional processing technology with green hams from local cross pigs. Samples of Biceps femoris were taken from 5 hams randomly at each of the key stages of production, i.e., green ham, end of sa

Abstract:采用电击转化方法将双元载体质粒pCAM3300导入根癌农杆菌LBA4404,研究了不同实验条件对转化率的影响.结果表明:当电场强度为11 kV/cm时,转化率最高,每微克DNA得到9.8×103CFU;在细胞OD600为1.0时进行电转化,转化率最高,每微克DNA得到9.54×103CFU;在一定的细胞浓度范围内,电击转化率与细菌浓度密切相关,转化率随着细菌浓度的上升而上升;质粒大小与电击转化率之间没有明确的关系.将含pCAMBIA3300的根癌农杆菌与粗糙脉胞菌共培养转化,在含有膦化麦黄桐(PPT)(405 mg/L)的平板上筛选到转化子.PCR扩增转化子的染色体,初步证明Bar基因整合进粗糙脉胞菌的染色体中.

Abstract:在实验室挤压机上，通过菜籽仁和玉米粉混合挤压，筛选了脱毒添加剂种类，考察了添加剂质量分数、挤压温度、螺杆转速及原料水分对菜籽仁硫甙脱除率的影响．结果表明：菜籽仁和玉米粉混合可实现稳定挤压脱毒；与其它添加剂比较，添加剂（A＋B）对硫甙降解脱除效果更显著，硫甙脱除率可高于98%。最合理的混合挤压加工条件为：（A＋B）添加量为0．263%＋0．179%，挤压温度130℃，螺杆转速95r／min，原料水分质量分数为12．0％。

Abstract:In this report, with EPC as a model, the protective effect of trehalose on the EPC liposomes membrane was studied by the variety of fluorescence anisotrophy, that showed the movement of the liposomes head groups. The mechanism of their interaction was als

Abstract:GF polyphenol was extracted from Grifola frondosa mycelium and its pharmacological functions were determined in this paper. Brown powder was extracted using low-polar macroporous adsorption resin and its main ingredient was identified as polyphenol, by ul

Abstract:The experimental data showed that, in aerobic glutamate fermentation with strain C.glutamicum S9114, glutamate produced in different ways with different patterns of O_(2) uptake rate (OUR), CO_(2) evolution rate (CER) and by-products accumulation at diffe

Abstract:用正交设计试验方法对裂褶菌(Schinophyllum communeFr.)进行了液体培养基的筛选研究.结果表明,裂褶菌液体培养基的最适配方为:马铃薯200 g,麸皮100 g,葡萄糖30 g,酵母膏1.0 g,KH2PO45 g,MgSO4.7H2O 2.5 g,VB10.1 g,CaCO33 g,H2O 1 L.

Abstract:采用稀释平板分离法从土壤中分离到一株产中性蛋白酶芽孢杆菌BX-4．通过单因素碳、氮源以及正交试验确定了最佳产酶培养基配方，同时还研究了起始pH值、金属离子、接种量对产酶的影响以及温度、pH值、金属离子以及表面活性剂对酶稳定性的影响；以最佳培养基为发酵培养基，于37℃、160r／min振荡培养48h，酶活达2519．35U／mL；该酶最适作用温度为55℃，最适作用PH值为7．5，在pH7．5缓冲体系中，55℃反应60min后仍有50％的酶活力，Ca^2＋和表面活性剂对酶有一定的激活作用，但激活作用不明显。

Abstract:By analysis of the Infrared Spectra of crude proanthocyanidin and purified proanthocyanidin extracted from grape seed, a single peak at 1 520~1 540 cm~(-1) region was observed, which could be used to verify the fact that, the basic structural unit of grap

Abstract:The optimum extracting conditions of anthraqinones from Rhubarb with the aid of ultrasonics were studied with the orthogonal test design.The results showed that when dousing the dried Rheum powder with 90% ethanol(1 g in 30 mL) for 12 hrs, and with the ai

Abstract:通过对谷氨酸棒杆菌突变株AATV341进行生物素和VB1添加量的实验，探讨了生物素和VB1添加量对该菌株菌体质量及缬氨酸产量的影响；同时根据对AATV341进行的胞内外某些特定氨基酸和有机酸检测，研究了这两种维生素对碳架代谢流的分布，尤其是对丙酮酸节点处的代谢流量分布的影响。结果表明，生物素添加量在40μg／L时，菌体质量和缬氨酸在胞外的累积明显提高，谷氨酸在胞外累积降低；VB1的适量添加，可提高缬氨酸在胞外的累积，降低发酵液中乙酸和草酰乙酸的含量。

Abstract:The optimal nutrition and culture conditions of Aspergillus niger strain 537 were studied.The solid koji activity of pectinase, CMCase, xylanase,glucoamylase and proteinase were 4 973.6, 199.8,4 993.3, 3 170.0,26 636.7 U/g, respectively.The extracting con

Abstract:Effective, safe and environmental friend inhibitors are necessary for the purpose of bacteria inhibition. In the present study, the results showed that, the pheophorbide a had the efficacy in repressing the growth of Staphylococcus aureus and the protopla

Abstract:研究了各种增殖因子对双歧杆菌的增殖效果,选出几种增殖效果好、价格低的物质进行正交试验优化培养基.得出长双歧杆菌(PBA)增殖培养基:在基础培养基基础上额外按体积分数添加平菇汁20%、卷心菜汁20%、豆浆20%、胡萝卜汁5%.在此培养基中,PBA经16 h培养,菌数可达2.45×109CFU/mL;得出婴儿双歧杆菌(INF)增殖培养基:在基础培养基基础上额外按体积分数添加平菇汁10%,蕃茄汁15%,肝浸汁15%,在此培养基中INF经16 h培养,菌数可达2.58×109CFU/mL.

Abstract:The primitive IGF-1 from colostrums was obtained by ultrafiltration, and a higher yields could be obtained at pH 8.0 other than pH 4.2. The rude IGF-1 after ultrafiltration was tested by SDS-PAGE, and the pure IGF-1 was obtained Chromatography with a Seph

Abstract:The antioxidant activities of extracts from brewed vinegar were evaluated using different in vitro tests. Adding ethanol after extracting the concentrated vinegar with acetacetic ester, then the ethanol supernate of vinegar (HVE) was collected. The HVE wa

Abstract:采用护色剂ZnCl2和糖（蔗糖、麦芽糖）对冷冻猕猴桃块进行处理，然后分析其在冷冻贮藏过程中的性质变化，实验结果表明：猕猴桃结合糖处理后，其颜色的保持、营养成分的保留以及其玻璃化转变温度与只用护色剂ZnCl2处理的猕猴桃相比，得到了一定的改善，色差中代表绿色强弱的-a值的绝对值提高了近一倍，营养成分维生素C的质量分数也由0．8683％提高到1．1966％，玻璃化转变温度也由-36．818℃提高到-31．345℃．