酵母综合利用产品——提取高效天然牲保存剂海藻糖

海藻糖是理想的天然保存剂，用于高档食品、医用等生物活性物质保存剂和稳定剂。然而过去只能从天然物中提取，提取量有限且成本高，限制了它的应用。用糖蜜发酵生产酵母，从酵母中提取，将能大量生产并降低成本，也为糖业增加经济效益。本文介绍海藻糖的功能、用途、国内外情况及生产方法。     

HPP－1型皮革加脂剂的研制和应用

本文概述了以磷酸化蓖麻油和羟化磷脂为基础的皮革加脂剂的研制，讨论了合成反应、产品配伍、应用试验等工艺过程。     

新型海藻糖酶抑制剂的合成及生物活性

本文合成了未见文献报道的七个化合物,其结构均得到核磁共振、红外光谱、质谱和元素分析的确证,并测试了其海藻糖酶抑制活性,生测结果表明此类化合物显示了一定的抑制作用。     

Effect of puerarin on the P13K pathway for glucose transportation and insulin signal transduction in adipocytes

To explore the effect of puerarin on insulin receptor (IR), insulin receptor substrate-1 (IRS-1) and protein expression of protein kinase B(PKB) in the P13K pathway of the glucose consumption, transportation and insulin signal transduction in 3T3-L1 adipocytes with insulin resistance. The insulin resistance 3T3-L1 adipocytes model was established by free fatty acid induction. The model cells were managed with puerarin in different concentrations. Glucose consumption was detected with glucose oxidase method, glucose transportation rate was determined by 2-deoxy-3H glucose ingesting method, and the IR, IRS-1 and PKB expression were determined by Western blot. Glucose consumption and transportation were significantly decreased in the model adipocytes, but increased after treated with puerarin (P<0.01). Moreover, the level of tyrosine phosphorylation of IR subunit β was higher in the puerarin treated groups, and that of IRS-1 was higher in the group treated with low dose puerarin than that in the model group. The 3T3-L1 adipocytes of insulin resistance model could be induced by free fatty acid successfully, puerarin could promote the glucose utilization in them to alleviate the insulin resistance, which may be related with the action in advancing the tyrosine phosphorylation of IR and IRS-1.     

透性化酒精酵母细胞产海藻糖发酵培养基的优化

为提高酒精酵母细胞发酵液中海藻糖的含量,在制备出透性化酒精酵母细胞的基础上,用单因素实验和响应面分析法,优化了酒精酵母的发酵培养基,确定了最适培养基组成.实验结果表明,酵母膏、蔗糖及氯化钠的添加量对海藻糖积累影响显著,影响程度依次为:酵母膏＞蔗糖＞氯化钠.优化后的培养基组成为:酵母膏14.7 g/L,蔗糖32.5 g/...     

磷酸化蛋白质分析

蛋白质的磷酸化过程是人体内翻译后修饰的重要一步,非正常的磷酸化会导致人体产生各种疾病.近年来,通过分析化学的手段研究磷酸化的过程取得了很大的进展.该文就蛋白激酶分析、磷酸化多肽的富集方面的国内外的研究进展进行了综述.     

含氮磷酸酯高聚物阻燃剂的合成

本文选用磷酸,尿素与聚乙烯醇(PVA)缩合反应,合成含氮磷酸酯高聚物阻燃剂。实验证实,P-N起协同效应,阻燃效果明显提高。同吋,具有原枓易得,工艺较简单,成本也较低的特点,适宜于商品化,值得扩大实验。     

高效液相色谱法测定海藻糖

采用高效液相色谱法（HPLC），以Hypersil NH2柱为分析柱，乙腈-水（4：1）为流动相，采用示差折光检测器，一次进样能同时分离样品中的果糖，葡萄糖，蔗糖，麦芽糖，海藻糖，低聚糖等。测定了样品中的葡萄糖，麦芽糖，海藻糖的含量，线性相关系数0.9998-0.9999，变异系数0.67%-1.0%。回收率98.65%-100.6%。