微生物英文论文翻译文献

Aim: To isolate high activity saccharifying enzyme. Methods: The spore suspension were alternately performed by UV and photoreactivation, and the high-producing strain was primary screened by the mothod of transparent circle on plate. The secondary screening was carried out by the flask : A strain 12 was obtained by UV mutagenesis. Using flask culturation, the enzyme activity was U/mL, which was higher than of control strain, and the effect was significant. The mutanted strain identified by the test of genetic stability showed favorable stability. Key words: UV mutagenesis, Saccharifying enzyme, Aspergillus niger, Strain breeding哈哈，你倒是挺会偷懒的，祝你答辩顺利！

A microorganism (also can be spelled as micro organism) or microbe is an organism that is microscopic (too small to be seen by the naked human eye). The study of microorganisms is called microbiology, a subject that began with Anton van Leeuwenhoek's discovery of microorganisms in 1675, using a microscope of his own are incredibly diverse and include bacteria, fungi, archaea, and protists, as well as some microscopic plants and animals such as plankton, and popularly-known animals such as the planarian and the amoeba. They do not include viruses and prions, which are generally classified as non-living. Most microorganisms are single-celled, or unicellular, but some multicellular organisms are microscopic, while some unicellular protists, and a bacteria called Thiomargarita namibiensis are visible to the naked live in all parts of the biosphere where there is liquid water, including hot springs, on the ocean floor, high in the atmosphere and deep inside rocks within the Earth's crust. Microorganisms are critical to nutrient recycling in ecosystems as they act as decomposers. As some microorganisms can fix nitrogen, they are a vital part of the nitrogen cycle, and recent studies indicate that airborne microbes may play a role in precipitation and weather.[1]Microbes are also exploited by people in biotechnology, both in traditional food and beverage preparation, as well as modern technologies based on genetic engineering. However, pathogenic microbes are harmful, since they invade and grow within other organisms, causing diseases that kill millions of people, other animals, and plants.更多请看

化学和微生物分析 在试验日粮干物质和粗蛋白含量的分析中，排泄物和益生菌产品是根据AOAC（1990）方法（分别为和 ）分析。使用弹式量热计（model 1261, Parr Instrument Co., Moline, IL）测定总能量，根据芬顿博士（1979）的使用自动化分光光度计确定铬浓度。 第14和28天排泄物样本和第28天的肠道消化物的微生物分析，将样品在不同培养基中培养，测定总厌氧菌（胰酶解物大豆琼脂),双歧杆菌（MRS培养基），乳杆菌种（MRS培养基＋ NaN3+胱氨酸盐酸盐水化合物），梭菌属某些种（TSC培养基）和大肠杆菌群（紫色红胆汁琼脂）。通过培养技术对"益生菌"产品进行了微生物分析。嗜酸乳杆菌用MRS培养基＋ NaN3+胱氨酸盐酸盐水化合物培养，枯草芽孢杆菌通过琼脂培养基平板计数，酵母菌和米曲霉菌通过土豆葡萄糖培养基计数。通过使用厌氧袋厌氧系统创造厌氧条件，(BBL, No. 260678; Difco, Detroit, MI)。大豆胰酶解物的琼脂()，MRS琼脂培养基(No. 288130)，结晶紫中性红胆盐琼脂()，平板计数琼脂(No. 247940)，和马铃薯葡萄糖培养基(No. 213400)的使用是从Difco实验室（(Detroit,MI)购买的，和TSC培养基是从Oxoid (Hampshire, UK)购买的。益生菌产品的pH值由pH计(Basic pH Meter PB-11, Sartorius,Germany).测定。 小肠形态学 每个肠道样本取三横截面，使用标准的石蜡包埋程序与天青A和曙红染色。共有10个完好无损，良好的导向隐窝绒毛单位被选定为每个肠道截面，每个样品一式三份的 (Jin et )。从绒毛尖端绒毛到隐窝交界处测量绒毛高度，这个被定义为相邻绒毛内陷深度和隐窝深度。所有形态测量（绒毛高度和隐窝深度）通过使用一个图像处理的分析系统（擎天柱软件版本，网络媒体遗传学，北读，MA），增量为10-μm。

1 病毒很简单 一个细胞的实体是由一个或更多个 DNA或RNA组成的 并且包裹在蛋白质中（除此之外 有时 是包裹在像糖类脂类这样的物质中） 它们只能在活细胞中繁殖 并且寄生于细胞内 2 细菌有时通过注射于活着的寄主体或是有着病毒体配置品的细胞培养物中来培养。净化主要依靠他们相对于其它细胞成分的大体积 他们的高蛋白含量 和 强稳定性。 病毒的浓度可能由病毒体数量 和 可传染的单元的数量决定。3. 所有的病毒都有由包裹在蛋白质壳中的核酸组成的核壳体， 使得它们在结构上有二十面 螺旋且复杂。 这些蛋白质壳是由病原体（原体通过共价键自己组合）组成的。核壳体外包裹着一层膜 4.病毒染色体组的种类数量比真核生物原核生物的种类数量大得多 它们可以是单股的或者是双股的DNA或RNA。 核酸可以是线性的 封闭的圆 或者两者都有点。5.病毒是通过它自身核酸的性质 衣壳的对称性 有无薄膜 他们的寄主 被动物或植物病毒导致的疾病 或其它特性分类的。靠 累死爹了。。。。