Gelation Properties of Ovalbumin as Affected by Fatty Acid Salts

The physicochemical properties of heat-induced ovalbumin (OVA) gels containing fatty acid salts (FAS) were investigated. Water-holding ability and transparency markedly increased in the presence of sodium caprate or sodium laurate. At 9% of the protein concentration transparent and hard gels formed; at 7%, transparent and soft gels formed. Scanning electron microscopy showed that the transparent gels had a more homogeneous structure than turbid gels without FAS. Differential scanning calorimetry indicated that denaturation temperature of OVA was decreased and the peaks became broader after addition of FAS.     

Thermal unfolding of β‐lactoglobulin, α‐lactalbumin,and bovine serum albumin. A thermodynamic approach

Heat‐treatment is one of the most commonly used processes in food preparation technology. An understanding of the thermodynamics of protein stability and of conformational changes of proteins, acquired through the measurement of the denaturation temperature, is therefore of particular importance. This paper attempts to shed light on the interpretation of recent calorimetric data on the thennal denaturation of bovine β‐lactoglobulin, α‐lactalbumin, and bovine serum albumin by showing that thermodynamic parameters of heat‐induced unfolding, measured by differential scanning calonmetry, are closely related to the prevailing chemical conditions such as pH, concentration of ions, protein purity, and protein concentration.     

高纯度药用盐生产技术

作者通过多年的工作实践,对传统药用盐生产工艺、设备、技术等不断进行改造、更新,不但使药用盐产品质量在国内同行业中处于领先位置,同时依据本技术生产的高纯度药用盐质量已完全符合《英国药典》、《美国药典》等发达国家标准,大大提高了产品的市场竞争能力。     

毕氏海蓬子及其开发利用

针对盐田盐碱地的综合开发利用,在介绍毕氏海蓬子生物学特性的基础上,详细论述了海水灌溉作物毕氏海蓬子的经济价值和开发利用途径.最后,对毕氏海蓬子的开发利用提出了一些建议.     

3-十二烷氧基-2-羟基丙基三甲基氯化铵的合成及性质研究

本文以十二醇、环氧氯丙烷（EPIC）与三甲胺盐酸盐合成了阳离子表面活性剂3-十二烷氧基-2-羟基丙基三甲基氯化铵（DPAC）。实验得出了最佳合成条件：中间体十二烷基缩水甘油醚：n（脂肪醇）∶n（EPIC）=1∶1.8,反应时间4 h,温度50℃,碱的浓度为50%,四丁基溴化铵作催化剂;DPAC的合成：n（十二烷氧基缩水甘油醚）∶n（三甲胺盐酸盐）=1∶1,温度30℃,反应3 h。DPAC的收率可达96%。使用红外、核磁共振对产品进行了定性分析,并研究了其界面、抗菌、抑菌性质。     

市场上发酵蔬菜中乳酸菌数量的调查研究

乳酸菌（Lactic Acid Bacteria）是一类能发酵碳水化合物产生乳酸的细菌,广泛应用于发酵食品中,是发酵蔬菜中的有益菌群。泡菜主要是由乳酸菌发酵形成的发酵蔬菜。从食品安全的角度出发,研究市售的20种发酵菜样品（白菜类、黄瓜类、萝卜、类、辣椒类）中乳酸菌的数量多少,得出其与蔬菜种类、加工和包装方法的关系。不同类别中,黄瓜类的乳酸菌数量较多,萝卜、类的乳酸菌数量较少;同一类别中,散装的较袋装的乳酸菌数量多。     

浅谈客户关系管理在盐业企业中的应用

在目前充满竞争的市场上,如何抓住客户、留住客户,维持客户的忠诚度,保持市场竞争力,是今天所有企业都关心的问题。本文从客户关系管理的基本理论入手。分析盐业企业的管理现状,进一步论述了客户关系管理如何在盐业企业中实施应用。     

重组融合蛋白MBP-BSH 在大肠杆菌中的表达及其纯化、功能鉴定

选择IF2融合标签,另选择含SUMO、GST、NusA和MBP融合标签的质粒构建表达载体。SDS-PAGE电泳结果显示,重组菌Escherichia Rosetta(DE3) (pLS932-BSH)的诱导表达细胞提取液上清出现了明显的融合蛋白MBP-BSH条带,经诱导表达条件优化后,MBP-BSH可溶性大幅度提高。用Ni-NTA Resin和Amylose Resin分别进行目标蛋白纯化,结果显示前者效果更好,并且C端融合His-Tag更有利于其与Ni离子结合,MBP-BSH蛋白纯化量更大,杂带更少。茚三酮显色反应测定酶活力,结果显示纯化后的MBP-BSH的酶比活力为2.4282U/mg。     

Exogenous mammalian sex hormones mitigate inhibition in growth by enhancing antioxidant activity and synthesis reactions in germinating maize seeds under salt stress

BACKROUND: Mammalian sex hormones (MSH)—progesterone, β‐estradiol and androsterone—enhance plant growth and development by stimulating significant morphological and biochemical parameters under normal conditions. However, there is no report regarding their effects on plants exposed to environmental stress conditions. Therefore, the present study was focused on elucidating the possible positive effects of MSH on seedling growth, antioxidant activity and synthesis reactions in maize seeds exposed to salt stress, one of the most important environmental stresses. For this purpose, the various concentrations (10^?6, 10^?8, 10^?10 and 10^?12 mol L^?1) of MSH were studied. RESULTS: Salinity (100 mmol L^?1 NaCl) significantly reduced root length and seedling height, whereas MSH treatment significantly ameliorated the adverse effects of salinity on root length and seedling height. On the other hand, although salinity increased soluble protein, soluble sugar and proline content in 7‐day‐old maize seedlings, these were higher in MSH‐treated seedlings. Similarly, MSH treatment augmented superoxide dismutase, peroxidase and catalase activities under salt stress, whereas it decreased superoxide production and lipid peroxidation level. The most favorable concentrations were determined as 10^?8 mol L^?1 for progesterone and β‐estradiol and 10^?10 mol L^?1 for androsterone. CONCLUSION: Exogenous MSH application was found to have an important ameliorative effect on growth of seeds exposed to salt stress by stimulating antioxidant activity and synthesis reactions. This is the first study investigating the effects of MSH on germination of seeds exposed to stress conditions. Copyright © 2011 Society of Chemical Industry