菌体

Nov.. The main symptoms of the bacterial disease on Vigna angularis were canker of stalk.The strains were straight or curved rods; polar flagellum one; Gram-negative; could infect Vigna angularis、 Glycine max、 Vigna radata、 Vigna umbellate、 Phaseolus vulgaris、 Pisum sativum、 Pisum sativum var.humlie; oxidase negative; nitrate reduction negative; 5% glucose agar mucilage positive; esculin hydrolysis positive; starch negative; milk hydrolysis positive; H_2S positive; acid from L-arabinose, D-mannose, D-galactose, cellobiose, trehalose and fructose; 5%NaCl positive; G+Cmol%-69%.

红小豆溃疡病主要症状为茎部溃疡；各菌株菌体均杆状；极生鞭毛1根；革兰氏染色阴性；人工接种能侵染多种豆科植物；好氧；氧化酶阴性；硝酸盐反应阴性；5％葡萄糖营养琼脂黏液生长阳性；七叶灵水解阳性；淀粉水解阴性；牛奶分解产碱；产生硫化氢；能从阿拉伯糖等产酸；最大耐盐量为5％；G+Cmol％为69％等特征，根据《手册》9th ed相关部分，确定该病由野油菜黄单胞菌苜蓿致病变种Xanthomonas campestris pv.alfalfae(Riker，Jones et Davis 1935)Dye 19781引起。

A high-yielding mutant Rhizopus arrhizus R4 producing γ-linolenic acid was successfully obtained when the original strain Rhizopus arrhizus R0 was treated by UV,and by the screening methods of resisting maleic hydrazide.

以少根根霉R0为出发菌株，利用紫外诱变结合失水苹果酰肼筛选的方法，选育出突变株R4，摇瓶培养菌体油脂含量35.55%，其中GLA占油脂的12.5%，比原始菌株油脂含量提高了93.94%，GLA提高了276.5%。

Next, BALB/c mice were orally infected with Y. pseudotuberculosis and its ompR mutant to study metabonomic variation of different intestine-associated organs after 24 h infection. The results showed that a majority of metabolites were decreased during this acid adaptation process, but phosphoenolpyruvate, 5'-GMP, 5'-AMP, 5'-UMP, GDP/GTP of wild type strain and lactate, Tyr, phosphoenolpyruvate, 5'-AMP、GDP/GTP of the ompR mutant strain were increased.

为了探讨病原细菌感染动物后特别是在酸性环境下代谢物的变化规律，首先在体外模拟假结核耶尔森氏菌及其全局性调控因子OmpR突变株在适应酸性环境时所引起的菌体自身的代谢变化，然后通过BALB/c小鼠口服感染耶尔森氏菌，研究小鼠感染病原细菌24h后各种相关器官的代谢变化。

Methods The selected microorganisms were cultivated at 37℃ in culture media that was put different concentration of sodium arsenite,and detected arsenic accumulation in cells by ASA.

各菌株接种在不同浓度含砷培养基中，观察其对砷的耐受性及砷对各菌株的生长影响；利用超声波细胞粉碎机震碎菌体后，用超低温捕获原子吸收分光光度仪检测砷含量，用荧光光谱检测器检测砷形态。

But Armillaria has the unique ability to extend rhizomorphs, flat shoestringlike structures, that bridge gaps between food sources and expand the fungus's sweeping perimeter ever more.

但奥氏蜜环菌有独特的生长方式：延伸菌根，连接食物源与菌体，然后迅速向外生长。

By inhibiting the sterol biosynthesis of cell death in plants conduction with absorption in the role of ascomycetes and a half for the bacteria known to a wide range of diseases caused by a very good control effect.

通过抑制甾醇的生物合成而使菌体死亡，在植物体内具有内吸传导作用，对于子囊菌和半知菌引起的多种病害防效极佳。

The supernatant of the recombinant E. coli by sonication could not only repress the pigment synthesize of Chromobacterium violaceum ATCC 12472, but also could attenuate the intensity of bioluminescence of V. harveyi VIB391 and V. harveyi BB886 by 68% and 53%, respectively.

将表达的重组菌体经超声波破碎后，取其上清液作用于紫色色杆菌ATCC 12472，使其受密度感应系统控制的紫色色素的合成受到抑制；又用上清液分别作用于哈维氏弧菌的发光菌株VIB391和BB886，可使其发光强度分别减弱68%和53%。

The effects of four factors (concentration and the quantity of NaOH,temperature and heating time) on the protein recovery were studied on the base of the analysis of mycelium residue of itaconic acid fermentation.

研究了衣康酸工业化生产中所产生的土曲霉废菌丝体的主要组成成分，用碱液提取的方法进行了蛋白质的提取回收实验，考察了NaOH溶液浓度、用量、加热温度及时间对菌丝体脱蛋白效果的影响，结果表明衣康酸菌体脱蛋白的最优条件为：NaOH液浓度0.5mol/L，碱液用量为菌丝体的40倍，90℃条件下加热9h。

Pseudomonas cocovenenans subsp farinofermentans-bacterium responsible for some food poisoning, were first isolated from fermented corn in the North-east of China in 1977. The studies were conducted in our laboratory during the last decade on the antigen structure, identification methods for the bacterium by biochemical techniques and the characteristics of Bongkrekic acid, including structure, inducing machinism and curing method of the toxin.

椰毒假单胞菌酵米面亚种是我国学者于1977年在东北酵米面中毒食物中发现的一种新的食物中毒菌，我们曾对其菌体抗原结构，生化鉴定和检测方法以及其产生的毒素-米酵菌酸的结构、产毒机制和消毒、去毒等方面进行了深入的研究。

Some 90% of the tested 110 extracts appeared antitumor activity and 13 strains of the 55 isolates showed higher inhibitory capacitieseffective concerntrations ≤16μg/ml）, which may imply a possiblility in their further medical application;whereas the percentage of positive extracts was higher from the thalli than that from the supernatants and of actived strains was higher in the bacteria than that in the molds according to this study.

结果表明，55株微生物发酵样品共110个提取物中，90％样品表现出细胞毒活性；其中13株微生物的活性较强（提取物有效抑制浓度≤16μg/ml），具有较好的开发应用前景。同时还发现，菌体中检测到的活性菌株数大于发酵液中检测到的活性菌株数，细菌的筛选得率高于霉菌的筛选得率。

According to the clear water experiment, aeration performance of the new equipment is good with high total oxygen transfer coefficient and oxygen utilization ratio.

曝气设备的动力效率在叶轮转速为120rpm～150rpm时取得最大值，此时氧利用率和充氧能力也具有较高值。

The environmental stability of that world - including its crushing pressures and icy darkness - means that some of its most famous inhabitants have survived for eons as evolutionary throwbacks, their bodies undergoing little change.

稳定的海底环境─包括能把人压扁的压力和冰冷的黑暗─意谓海底某些最知名的栖居生物已以演化返祖的样态活了万世，形体几无变化。