水基金属加工液中微生物多样性研究

微生物污染会缩减金属加工液使用寿命,细菌比真菌更容易在金属加工液中滋生。在所采集的6组金属加工液样本中,共检测出细菌2门、2纲、5目、6科、10属和14种,而真菌为4门、8纲、10目、14科、15属和17种,真菌多样性更丰富,但真菌只出现在细菌污染严重的样本中。种水平下,弗氏柠檬酸杆菌(Citrobacter＿freundii)、Unclassified＿g＿Citrobacter、Unclassified＿f＿Enterobacteriaceae被确定为优势细菌,且检出细菌以革兰氏阴性菌为主;真菌以未知真菌(Unclassified＿k＿Fungi)和Fusarium＿petroliphilum为主。     

立足生物科技前沿——记温州医学院博士生导师金利泰教授

金利泰教授从事蛋白质、DNA等生物大分子检测技术的开发及其机理研究已十余年,为了开发新的生物大分子检测技术,他带领团队付出了艰辛的努力,同时也获得了应有的回报。     

最适合宝宝吃的夏季辅食

牛奶粥 适合年龄：5～10月 制作过程：牛奶100克、大米50克、水400克。将大米淘洗干净。用清水浸泡1～2小时。先把水烧开,再下人泡好的大米,用小火煮30分钟,加入牛奶再煮片刻即成。此粥味美可口,含有丰富蛋白质、脂肪及多种维生紊和钙、铁等矿物质,营养丰富。     

美国宇航局研制3D食物打印机

美国宇航局出资研制一种可以用装满油、蛋白质粉和碳水化合物的3D食物打印机,3D食物打印机中的材料可能来自于昆虫、草和藻类。这一想法听起来似乎遥不可及。不过,宇航局已经向3D打印机厂商系统与材料研究公司(SMRC)提供一笔为期6个月的12.5万美元资金,要求其研制一种通     

A generalized approach for protein design based on the relative entropy

In the present study, we have developed the method brought forward recently for protein design based on the relative entropy. The new approach can be used in more common situation other than the special limits in the anterior method. The results indicate that our generalized method has increased the prediction precision for protein sequence and will be in favor of the study for protein design.     

Screening of the interacting proteins with NifA in <Emphasis Type="Italic">Azospirillum brasilense</Emphasis> Sp7 by the yeast two-hybrid system

NifA in AzospiriUum brasilense plays a key role in regulating the synthesis and activity of nitrogenase in response to ammonia and oxygen available. In this work we used the yeast two-hybrid system to identify the proteins that interact with NifA. The nifA gene was fused to the yeast two-hybrid vector pGBD-C2, and three A. brasilense Sp7 genomic libraries for use in yeast two-hybrid studies were constructed. Screening of the libraries identified four clones encoding proteins that interact with NifA. The confirmation of the interactions of each gene product of the four clones and NifA were carried out by exchanging the vectors for nifA and the four clones and by mutageneses of the four clones with shift reading frame experiments in yeast two-hybrid studies. DNA sequence analyses showed that two clones encode proteins containing PAS domains that play an important role in signal transduction. One clone has high similarity with the fhuE gene of Escherichia coli, whose gene product is involved in iron uptake and transportation, and the other clone encodes an unknown protein.     

哈尔·G·科拉纳(1922-2011)

●现代生物学巨匠哈尔·G·科拉纳(下图)1968年与其他两位科学家分享了当年度的诺贝尔生理学或医学奖。他们虽各自独立研究,但都因破解了遗传密码及其在蛋白质合成过程中的作用而予以褒奖,诺贝尔奖颁奖辞如是说。     

常吃鸡蛋补全身

鸡蛋是自然界的一个奇迹,一个受过精的鸡蛋,在温度、湿度合适的条件下,不需要从外界补充任何养料,就能孵出一只小鸡。同样,鸡蛋也是一种营养非常丰富的食品,其中含有优质蛋白质、脂肪、卵磷脂、多种维牛素和铁、钙、钾等人体所需要的多种矿物质。因而,鸡蛋曾经被人们当成珍贵的补品,只有孩子、老人、病人、孕产妇才有吃它的权利。     

“有助于揭示人体运行复杂细节的发现”——2012年诺贝尔化学奖简介

在药物设计方面我们希望,通过了解细胞受体的三维结构,可以开发更有针对性和更有效的药物。——布莱恩.K.科比尔卡因"G蛋白偶联受体研究"获得2012年诺贝尔化学奖的两位美国科学家,分别是北卡罗来纳州杜克大学医学中心教授、69岁的罗伯特.J.莱夫科维茨(Robert J.Lefkowitz)和加州斯坦福大学医学院教