查询词典 nitrogen-fixing bacteria

Objective To study the community of denitrifying bacteria and nitrate-nitrogen removal in downflow fixed-bed bioreactor.

目的研究下流式固定床反应器的脱氮效果及反硝化细菌群落结构。

Within the nodules the bacteria convert free nitrogen to nitrates, which the host plant uses for its development.

根瘤内的固氮菌将游离氮转化为硝酸盐，被宿主植物在发育中利用。

The morphological analysis of strain EMZY-1 showed that it was a straight rod, about 0.3×1.7 in size, and spherical and terminal spore appeared. Results of physiological and biochemical test showed that strain EMZY-1 was a Gram-positive bacteria, and could not grow when temperature was lower than 10℃ or higher than 60℃, pH was lower than 5.0 or higher than 12.0, and the concentration of NaCl was more than 10%. The strain EMZY could grow on the medium as a of sugar, glucose and mannite. The strain could use saccharose, glucose and mannitol as carbon resource, and NH4(superscript +) and NO3(superscript -) as nitrogen resource.

通过对该菌株的形态、培养特征、生理生化特征的研究以及16S rDNA序列分析表明：该菌株为革兰氏阳性菌；细胞为棒杆状，端生孢子，大小约0.3×1.7；温度低于10℃、高于60℃无明显生长；pH低于5.0、高于12.0无明显生长；NaCl质量浓度达到10%菌株不能生长；能在蔗糖、葡萄糖、甘露醇为C源的培养基上生长；NH4、NO3为菌株良好N源。

The effects of immobilized microbes including Rhodospirillaceae, Bacillus, Nitrobacteria and denitrifying bacteria on the changes in species, quantity and biomass of algae and zooplankton in aquiculture water and on the physicochemical environmental factors, such as nitrogen, were studied.

研究了固定化微生物(含有光合细菌、芽胞杆菌、硝化细菌以及反硝化细菌)对养殖水体中藻类和浮游动物的种类、数量、生物量以及水体氮素等理化环境的影响。

The relative contribution of bacteria and archaea to ammonia oxidation is essential for our understanding of global nitrogen cycle.

氨氧化古菌和细菌对地球氨氧化过程的相对贡献率，是目前全球氮循环研究最重要的微生物生态学问题之一。

Being the joint of biological nitrogen fixation and bacteria classification,Rhizobium taxonomy is one of the most important fields.

根瘤菌分类作为生物固氮和细菌分类两个领域的结合点，具有十分重要的意义。

Anoxygenic phototrophic bacteria are good model organisms used to study the origin and evolution of life, photosynthesis and nitrogen fixation mechanism.

不产氧光合细菌一直是研究生命起源与进化、光合作用和固氮机理的良好模式生物。

Their roots are home to bacteria that put nitrogen, an important plant food, into the soil.

他们的根给细菌补充氮－－一种很重要的植物的食物－－到土壤里。

Through measuring their ability to degrading shrimp feed, 10 functional bacteria strains were obtained,which are capable of utilize shrimp feed as the sole source of carbon and nitrogen,degrading artificial shrimp feed and clam rapidly（CODMn removing rate are over 60% and 70% in 72hours,respectively）,and growing well in shrimp culture environment.

通过测定其对对虾饵料降解能力，筛选到虾池有机污染物降解菌10株，这些菌能以对虾饵料为唯一碳源和氮源生长，对对虾配合饵料和蛤蜊肉具有较强降解能力（72 h内 CODMn去除率分别在60%和70%以上），并可在虾池环境条件下良好生长。

Aerobic denitrifying bacteria were isolated from soil and water. The ammonia could be aerobically oxidized to nitrates, then aerobically reduced to molecular nitrogen.

从土壤和水中筛选分离到混合脱氮微生物菌群，能在好氧条件下将NH+4一步步转化为N2排放，整个过程无NO-3的积累。

As she looked at Warrington's manly face, and dark, melancholy eyes, she had settled in her mind that he must have been the victim of an unhappy attachment.

每逢看到沃林顿那刚毅的脸，那乌黑、忧郁的眼睛，她便会相信，他一定作过不幸的爱情的受害者。

Maybe they'll disappear into a pothole.

也许他们将在壶穴里消失