抑制细菌的

The columna soil study showed that strain NBT had the ablity of potassiumuptake ,making losed potassium from the soil inoculated with the bacterium wasdecreased by

通过土柱试验发现，硅酸盐细菌NBT菌株还具有保钾功能，供试土壤接菌处理后的土壤滤液中流失的钾比对照减少35.5-56.5％，经方差分析，差异达显著水平；另外，硅酸盐细菌NBT菌株与农药的相容性试验表明，无论在大田农药施用浓度和残留浓度内的丁草胺、绿黄隆、三唑酮粉、多菌灵、马拉硫磷等农药对NBT菌株没有抑制作用；乐果、甲基1605在大田施用浓度下，对NBT菌株有一定抑制作用，而在残留浓度下，对NBT菌株无明显抑制作用。

Compounds 2-4 were isolated from the plants of Chloranthaceae for the first time.The antibacterial activities of these six compounds were tested for the first time.Some compounds may have potential for future study and development as plant-derived oral antibacterial agents.

化合物1为1个新的天然产物，化合物2~4为首次从金粟兰科植物中分离得到，首次测定了6种香豆精类化学成分的抗菌活性，一些化合物具有进一步研究开发成为抑制口腔细菌的天然药用植物制剂的潜力。

Difficile is not as strong as that between the infection and antibiotics.

然而，他强调，胃酸分泌抑制剂与难治梭胞杆菌之间的关系并不像感染与抗生素之间那样紧密；必须要重视的是，感染难治梭胞杆菌的最大风险是使用抗生素，而且住院老年病患的风险最高，我们必须了解难治梭胞杆菌引起的感染越来越常见，且越来越严重，因为新的抗药性菌种已经被发现，因为感染这些高抗药性细菌的病患对治疗反应不佳，这样的课题已经受到重视。

Results After screening, 59 subtracted library clones were isolated which were specific for strain VIB72, and the DNA sequences of these clones were determined. Seventeen fragments showed high homology to the genes of known functions in other bacteria. This includes soluble lytic murein transglycosylase, mobilization protein, transposase (IS66), resistance-related protein (metallo-beta-lactamase and acetyltransferase family), toxin protein (DT-201 and alveicin A immunity protein), ATP-dependent endonuclease of OLD family like protein, SocE and GTP-binding protein HflX (high frequency of lysogenization).

通过对差减文库筛选，分离到59个对菌株VIB72的克隆，并对这些克隆的DNA序列进行了测定。17个基因片断与其它细菌的已知功能的基因有较高的同源性，其中包括可溶性溶胞壁质转糖基酶、转移蛋白MobA和MobC、转座子IS66、抑制相关蛋白（金属β-内酰胺酶和乙酰转移酶家族）、毒素蛋白（DT-201和alveicin A免疫蛋白）、与OLD 家族相似的ATP依赖性核酸内切酶以及SocE 和GTP结合蛋白HflX。

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。

objective in order to exploit the natural resources of chinese herbs,the inhibitive effects of the compositions of28chinese herbs on the growth of8common bacteria in oral cavity were determined.methods sen-sitive test of these bacteria were carried out by mtt method.at the same time,chessboard dilution method was used for combined sensitive test.results the compositions of28chinese herbs can inhibit the growth of5bacteria in dif-ferent levels,but the effects on other3bacteria are not obvious.quercetin and usnic acid have better effects on5bacteria than other26herbs compositions,with mic0.03125～0.125mg/ml and0.0156～0.0625mg/ml.conclu-sion quercetin and usnic acid can inhibit the5bacteria growth more effectively than other26herbs compositions.

目的 测试28种中药有效成分抑制8种口腔常见致病菌的作用，为抗菌中药有效成分用于口腔感染性疾病的防治做一些探讨。方法选择28种有抗菌作用的中药的有效成分，采用噻唑蓝法对8种口腔常见致病菌作药物敏感实验，同时采用液体棋盘稀释法进行联合药敏实验。结果 28种中药有效成分对3种牙周细菌抑制作用不明显，对另5种口腔常见细菌有一定的抑制作用，其中松萝酸和槲皮素有较强的抑菌作用，mic值分别在0.0156～0.0625mg/ml和0.3125～0.125mg/ml之间。结论所选28种中药成份中，松萝酸和槲皮素具有较强的抑菌作用。

At different flow velocity, corrosion rate is further increased by the entrained sand in the medium.

旨在探讨缓蚀剂在含砂的高流速腐蚀介质中的腐蚀抑制和室内评价方法的建立，极端腐蚀条件下改性环氧涂料的性能，以及柴油的微生物处理过程中细菌的协同作用机理，为管道系统的内腐蚀防护应用和石油烃处理提供理论依据和技术支持。

We further investigated the mechanism of VFAs production. Results revealed that this novel process could reduce the inhibitory effect of VFAs on the acid-forming microorganisms, and the total VFAs yield and the removal ratio of organic solids respectively depended on the first stage and the third stage of this novel process.

进一步分析多级逆流工艺产酸的机制，发现产酸效率的提高在于降低了发酵产物对厌氧产酸细菌的抑制效应，并且工艺的VFAs产率以及有机质去除率分别取决于第一级和第三级厌氧发酵过程。

Design of peptide inhibitors for furin based on the C-terminal fragment of histone H1.2The mammalian proprotein convertase furin has been found to play an important role in diverse physiological and pathological events,such as the activation of viral glycoproteins and bacterial exotoxins.

基于组蛋白H1-2片段的furin抑制剂的设计改造在哺乳动物的许多生理和病理活动中，前体加工酶furin起到了非常重要的作用，例如对病毒糖蛋白和细菌毒素的激活。

The VVA0326- mutant carrying a deletion of the GGDEF domain displayed smaller colony morphology on LB plate while compared to the wild type. No difference in colony forming units was found indicating that growth rate is not likely a major factor to confer the phenotype of small colony. In addition, VVA0326- appeared to swim better than wild type bacteria on the swimming plate. VVA0326- grew better, while VVA0328- mutant, which carried a deletion of the EAL domain, grew worse than wild type when the bacteria were cultured on CAS plate at 30°C. This implied that changes in surface structures of the mutants affected the bacterial susceptibilities to HDTMA contained in CAS plate.

缺损了包含一个GGDEF功能区域的突变株 VVA0326-，培养在LB的洋菜胶上，呈现出较小的生长菌落，在测定单位菌落数的结果发现，VVA0326-在生长速度上，相较於野生株并没有不同，因此我们推论生长速率并不是造成菌落变小的主要因子，除此之外，VVA0326-在游泳的分析培养皿中游的比野生株快，在CAS的分析培养皿上，与野生株比较，VVA0326-有比较好的生长状态，而缺损了包含一个EAL功能区域的突变株VVA0328-，却有被抑制生长的现象，可能是因为突变株影响了表面的结构，进而改变了细菌对於HDTMA的敏感层度。

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。