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  microbial ecology
The database will provide information that is of interest for the development of microbial ecology and biotechnology, in particular, for the prediction of biological hazard from the application of transgenic strains.
      
The role of biofilms in microbial ecology and in biotechnology is discussed.
      
Microcins play an important role in microbial ecology and are promising as antibiotics.
      
The expectant contents of the database will be useful for resolving various problems of microbial ecology and biotechnology which deal with luminescent bacteria, luminescent system derived from them, and lux-genes cloned to other organisms.
      
This process affects the microbial ecology of the gastrointestinal tract and influences gut metabolism and function.
      
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Using Hungate obligate anaerobic technipue, the characteristics on microbial ecology of twophase anaerobic digestion process for UASB reactors have been investigated with synthetic wastewater of crude glucose as substrate. In acid phase, fermentative bacteria are Predominant, which reach 10~7 cells/ml, 2—3 orders of magnitude greater than H_2—producing acetogenic bacteria and methanogenic bacteria. In methanogenic phase, the numbers of three groups bacteria above are nearly the same (approximately 10~8 cells/ml),...

Using Hungate obligate anaerobic technipue, the characteristics on microbial ecology of twophase anaerobic digestion process for UASB reactors have been investigated with synthetic wastewater of crude glucose as substrate. In acid phase, fermentative bacteria are Predominant, which reach 10~7 cells/ml, 2—3 orders of magnitude greater than H_2—producing acetogenic bacteria and methanogenic bacteria. In methanogenic phase, the numbers of three groups bacteria above are nearly the same (approximately 10~8 cells/ml), which imply that the establishment of methanogenic phase depends on the growth and metabolic balance among fermentative bacteria. H_2—producing acetogenic bactera and methanogenic bacteria. Compared with the bacterial population existed in single phase process of UASB reactor as reference, the H_2—Producing acetogenic bacteria in methanogenic phase of two phase system are more than the former, which is opposite for fermentative bacteria, and the methanogens between the both reactors exhibit no significant change. This difference of microbial ecology may be one of the factor causing the both reactors to have the different operational stability to shocks of organic loading.

采用Hungate严格厌氧操作技术,以人工葡萄糖配水为基质,对二相UASB,工艺的微生物生态学特性进行了初步研究。产酸相中,发酵细菌占优势,达10~7个/ml,比产氢产乙酸细菌和产甲烷细菌高2~3个数量级。产甲烷相中,发酵细菌,产氢产乙酸细菌和产甲烷细菌含量相差不大(约10~8个/ml),因此,产甲烷相的建立依赖于三大类微生物类群的良好代谢平衡。与对照的单相UASB反应器相比,二相UASB工艺的产甲烷相反应器产氢产乙酸细菌量较高,发酵细菌量较低,产甲烷细菌量则非常接近。这种细菌生态分布的差异,可能是导致反应器运行稳定性不同的原因之一。

There are obvious shortages in the research of the fundamental theories of LABS biodegradation up to date. From the microbial ecological and physisological point of view, the authors recommended the ecological adaption of microbial community to the nonbiogenesis substance LABS and the characteristics of LABS biodegradation by the bacteria screened. It has been found that many kinds of bacteria have the ability of degrading LABS and that most of them have LABS biodegradation plasmid which encloses some important...

There are obvious shortages in the research of the fundamental theories of LABS biodegradation up to date. From the microbial ecological and physisological point of view, the authors recommended the ecological adaption of microbial community to the nonbiogenesis substance LABS and the characteristics of LABS biodegradation by the bacteria screened. It has been found that many kinds of bacteria have the ability of degrading LABS and that most of them have LABS biodegradation plasmid which encloses some important enzymes for biodegradation. The bacteria screened can use LABS as sole carbon source, so that biodegrade LABS in wastewater with high efficiency. Plesiomonas sp. 90-1 immobilized by sodium alginate can biodeg rade more than 90% of 100 ppm LABS easily, which makes the aerobic treatment of high concentration of LABS possibly.

微生物生态学和生理学等多角度地介绍了微生物群落对LAS这种非生物源物质的生态适应,以及筛选蒲株降解LAS的能力;研究表明,大多数细菌的降解能力,取决于降解性质粒的存在。筛选菌株以LAS为唯一碳源生长,可高效地去除污水中的LAS。用海藻酸钠固定化的筛选菌株PLesiomonas sp.90-1,还可高效降解100ppm的LAS废水,去除率在90%以上,实现了高浓度LAS废水的好氧处理。

An ecological study is made on the microbes in the sludge activated by coking waste water.Among the micro flora in coking sewage activated sludge from an open-air type treating pond,a toeal of 334 bacterial strains belonged to 10 respective genus are isolated and identified.

研究焦化废水活性污泥中微生物生态学.通过分离与鉴定,共有334株细菌,分别属10个属,组成了焦化废水曝气处理池活性污泥的微生物区系.

 
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