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细菌多样性     
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  bacterial diversity
     Analysis of bacterial diversity of kefir grains by denaturing gradient gel electrophoresis and(16S rDNA) sequencing
     应用变性梯度凝胶电泳和16S rDNA序列分析对kefir粒中细菌多样性的研究
短句来源
     Bacterial diversity study for the simultaneous nitrogen and phosphorus removal system (MDAT-IAT) by 16S rDNA cloning method
     16SrDNA克隆文库方法分析MDAT-IAT同步脱氮除磷系统细菌多样性研究
短句来源
     Analysis of Rumen Bacterial Diversity of Goat by Denaturing Gradient Gel Electrophoresis and 16S rDNA Sequencing
     应用变性梯度凝胶电泳和16SrDNA序列分析对山羊瘤胃细菌多样性的研究
短句来源
     Study of Bacterial Diversity Related to Marine Aquaculture and Evaluation of the Methods Applied
     与海水养殖相关的细菌多样性的研究及方法评价
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     Bacterial Diversity in Sequencing Batch Biofilm Reactor(SBBR) for Landfill Leachate Treatment Using PCR-DGGE
     PCR-DGGE研究处理垃圾渗滤液序批式生物膜反应器(SBBR)中的细菌多样性
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  microbial diversity
     Comparison of Microbial Diversity of Nonpathogenic Bacteria from Rice Seeds in Yangtze Delta Area, China and Japan
     中国长江三角洲地区及日本水稻种子细菌多样性研究(英文)
短句来源
     Analysis on Microbial Diversity of Different Agricultural Soils by Using Molecular Biology Technique
     采用分子生物学技术分析不同施肥土壤中细菌多样性
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  bacteria diversity
     The results show that the Spore forming bacteria diversity index of recovering grassland is higher than that of artificial grassland and deterioration grassland;
     研究结果表明 :芽孢型细菌多样性指数为恢复草地大于人工草地和退化草地 ;
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  “细菌多样性”译为未确定词的双语例句
     Diversity and its spatial distribution of bacteria in 0~5 cm,5~10 cm and 10~15 cm depths of non-tillage paddy fields were studied based on the molecular method of ARDRA(amplified ribosomal DNA restriction analysis).
     采用基因指纹图谱ARDRA分析和RFLP分析,对免耕水稻土壤中的细菌多样性及其在0~5、5~10、10~15cm土层的空间分布进行了研究。
短句来源
     According to the sequences alignment and analysis of comparability, the bacteria of the pink mat was consisted of Proteobacteria,Firmicutes,Bacteroidetes,Actinobacter,Deinococcus-thermus,Aquificals.
     与GenBank的序列进行比对和相似性分析 ,结果表明 ,组成该菌藻席的细菌分属于Proteobacte ria、Firmicutes、Bacteroidetes、Actinobacter、Deinococcus_thermus、Aquificals 6个类群 (phylum) ,表现出了高度的细菌多样性
短句来源
     4. Effect of Bt transgenic rice straw on the diversity of methanogenic bacteriain paddy soil16S rDNA fragments of methanogenic bacteria were amplified by differential primer and analyzed by PCR-DGGE.
     为了解转基因克螟稻对淹水土壤中产甲烷细菌多样性的影响,采用产甲烷细菌特异性引物扩增产甲烷细菌165:DNA片段并结合PCR一DGGE方法,计算各个样品的Shalmon指数和simpson指数,以此分析转基因水稻秸杆还土对水田产甲烷细菌种群多样性的影响。
短句来源
     Phylogenetic Diversity of Bacterium Associated with the Sponge Pachychalina sp.
     海绵Pachychalina sp.体内细菌多样性的研究
短句来源
     Procaryotae diversity on the biofilm of carrier and their function to excess sludge demineralization in gravel contact oxidation reactor(GCOR) were studied by constructed 16SrRNA library,PCR-based molecular surveys of environmental 16S rDNA genes.
     采用分子生物学手段,通过构建16S rDNA基因文库,对新型剩余污泥减量化处理系统—生物砾间接触氧化反应器(GCOR)中载体表面附着细菌多样性进行了系统发育分析,并讨论了多种细菌共存对剩余污泥减量化的贡献。
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  bacterial diversity
Analysis of Soil Bacterial Diversity: Methods, Potentiality, and Prospects
      
The paper presents a comparative description of the modern molecular genetic and routine culture techniques for assessing bacterial diversity in soils and gives analysis for the different results obtained by these two groups of methods.
      
Evaluation of Bacterial Diversity in Soil Microcosms at Different Moisture Contents
      
The bacterial diversity, whose value was maximum on the 40th day of succession, was higher in soddy gley soil than in burozem.
      
The difference in the bacterial diversity of soils was the most distinct when it was evaluated by measuring the proportion between proteobacteria and actinobacteria.
      
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  microbial diversity
The necessity of the collaboration of soil scientists, microbiologists, and molecular biologists in integrating different research methods for a proper assessment of soil microbial diversity is discussed.
      
Microbial Diversity Studies at the Winogradsky Institute of Microbiology
      
Throughout the succession the microbial diversity increased however it decreased after 21 days.
      
The Philippine National Collection of Microorganisms (PNCM): Repository of microbial diversity of the country
      
In order to analyse microbial diversity, a polyphasic approach was adopted for characterisation of these isolates, specifically through examination of key phenotypic traits, i.e.
      
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  bacterial biodiversity
They play essential roles in quite diverse environments and there has been an increasing interest in bacterial biodiversity.
      
This combination of molecular-based and metabolic-based methods expanded the insight into monitoring the changes in bacterial biodiversity.
      
The main phytoplankton groups, the bacterial biodiversity, as well as the faecal contamination indicators were determined.
      
Bacterial Biodiversity in Soil with an Emphasis on Chemically-Contaminated Soils
      
This review examines general principles of soil bacterial biodiversity, limitations in sampling soils, and examples of bacterial diversity in chemically-contaminated soils.
      
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  bacterial communities
Part of the review is devoted to analyzing methods used for studying the population dynamics of bacterial communities involved in xenobiotic degradation in natural biotopes or industrial waste disposal plants.
      
Vertical structure of bacterial communities in peats of the Yakhroma river floodplain
      
The abundance and taxonomic structure of soil bacterial communities have been studied in different geomorphological parts of the Yakhroma floodplain.
      
Seasonal dynamics of the structure of bacterial communities and, in some soil types, its spatial dynamics accounted for by changes in the botanical structure of peat across its profile have been revealed.
      
As a result of our study, morphological features of colonial bacterial communities were identified.
      
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  其他


The purpose of this study is to describe community structure of heterotrophic bactera in the Donghu Lake (Wuhan, Hubei, P. R. China) and compare empirical taxonomy and cluster analysis methods. A total of 169 bacterial strains growing on nutrient agar plates was isolated from water samples at different stations and water depths. Each isolate was identified by empirical taxonomy. The results indicated that they belong to Achromobacter, Acidaminococcus, Acinetobacter, Aerocoecus, Aeromonas, Alcaligenes, Bacillus,...

The purpose of this study is to describe community structure of heterotrophic bactera in the Donghu Lake (Wuhan, Hubei, P. R. China) and compare empirical taxonomy and cluster analysis methods. A total of 169 bacterial strains growing on nutrient agar plates was isolated from water samples at different stations and water depths. Each isolate was identified by empirical taxonomy. The results indicated that they belong to Achromobacter, Acidaminococcus, Acinetobacter, Aerocoecus, Aeromonas, Alcaligenes, Bacillus, Beneckea, Brevibacterium, Citrobacter, Clostridium, Corynebacterium, Enterobacter, Erwinia, Escherichia, Flavobacterium, Gaffkya, Micrococcus, Microbacterium, Neisseria, Pediococcus, Planococcus, Pseudomonas, Sarcina, Serrtia, Siderocopsa, Siderococcus, Staphylococcus, Streptococcus, and Zymobacterium 30 genera respectively, except for 2 cocci unidentified. The Bacillus was dominanting by number, especially, in the water sample from Station 1, it overran 50% in all strains. It showed that some bacterial groups distribution was different, but the strains of Bacillus, Micrococcus, Acinetobacter, Brevibacterium, Enterobacter, Flavobacterium, and Staphylococcus could be found in all stations. The diversity index of bacterial genus at three stations was approximate to each other. (See tab.4). A cluster analysis by computer IBM PC/XT was used for studying heterotrophic bacterial community structure of the Donghu Lake. Each isolate was examined by conventional techniques for 113 morphological, cultural, biochem-physiological and antibiotic resistance characteristics and by a set of 43 biochem-physiological test system. All data were clustered by computer according to the similarity value. The results indicated the diversity index at Station 1 was higher than those at the Station Ⅱ and Ⅲ, although the diversity index value from the 43 system was lower than 113 system (see tab.4). Comparison of water quality including the concentration of NO_2, NO_3, NH_3, inorganic N, SiO_2, total P and N/P showed that the water quality at Station Ⅱ and Ⅲ was similar but was quite different from the Station Ⅰ. (Tab. 3). These data were consistent with the cluster analysis results. In other words, the diversity index from cluster analysis coincided with environmental conditions. Based on above mentioned, it seems that cluster analysis is easier to do than conventional classification. Becouse identification of bacteria is extremely laborious and uncertain due to the geart variability of bacteria, so that that is very difficult in most cases. The chief advantage of cluster analysis is an objective description of individuals, we can get much more information on each strain and consider them as a set of abilities, which can be concerned with thier environment, thus the method may be especially useful in ecological studies.

对东湖异养细菌群落结构采用系统分类和微机聚类分析方法作了比较研究。169株由东湖Ⅰ、Ⅱ、Ⅲ站水体中分离的异养细菌分别隶属于30个细菌属。其中以芽孢杆菌属居于明显优势,其次是微球菌属。在不同水域或水层,细菌的分布表现有一定的差别,但各站间多样性指数值没有明显的差异。基于113项生物学特性检测结果,采用lBM PC/XT微机聚类分析后计算各站细菌的多样性指数发现:Ⅰ站明显高于Ⅱ、Ⅲ两站,43项检测系统所得结果与此表现了一致的趋势。这与东湖各站水环境的理化分析参数是比较吻合的。作者对以上结果作了讨论。

Thermophiles have been of interest for a long time both to scientists and to the general public, and are believed to have a great potential in biotechnology and some products are already on the markets. For present the current status of research, here we collect a great deal of new information on the thermophilic (eu)bacteria, discuss the main properties and differences of thermophilic bacteria and archaea, The diveristy, ecology, and evolution of thermophiles are also briefly reviewed.

长期以来人们一直对嗜热菌注以极大兴趣,对嗜热菌的研究无论在理论上或在商业应用上都有极大意义。本文在大量有关嗜热细菌的最新文献的基础上,讨论了嗜热真细菌和嗜热古细菌的主要特性及其差别,并对嗜热细菌的多样性,生态学和进化进行了概括论述。

One hundred and sixteen seed samples from Zhejiang Province of China and 129 from Luzon Island of the Philippines were studied for species diversity of Pseudomonads and related bacteria during 1993 - 1998. Over 1200 bacterial isolatesfrom Zhejiang Province and 2300 from Luzon Island were picked and identified by bacteriology, pathogenicity and numeric taxonomy method (Biolog). The fluorescent bacteria population in unit of rice seed from Luzon island was significantly higher thanthat from Zhejiang Province....

One hundred and sixteen seed samples from Zhejiang Province of China and 129 from Luzon Island of the Philippines were studied for species diversity of Pseudomonads and related bacteria during 1993 - 1998. Over 1200 bacterial isolatesfrom Zhejiang Province and 2300 from Luzon Island were picked and identified by bacteriology, pathogenicity and numeric taxonomy method (Biolog). The fluorescent bacteria population in unit of rice seed from Luzon island was significantly higher thanthat from Zhejiang Province. Sixteen species or types of Pseudomonas and two related species were identified, about half of whichwere not recorded from rice seeds before. Five hundreds and three nonpathogenic Pseudomonads and related bacterial isolatesfrom Zhejiang Province and Luzon Island were tested for antagonists against Rhizoctonia solani, Sarocladium oryzae, andAcidovorax avenae subsp. avenae. About 12% and 17% of the total isolates were antagonistic against one or more of thepathogens in Zhejiang Province and Luzon Island respectively.

在1993~1998年间对采自中国浙江省的116批及菲律宾自宋岛的129批稻种进行了假单胞杆菌及相关细菌多样性研究。分别从浙江省和吕宋岛分离出1200多个和2300多个有关菌株,并对它们进行了细菌学、致病性和数值分类(Biolog)法测定。结果显示,吕宋岛稻种上的荧光细菌数明显高于浙江省。鉴定出16个假单胞杆菌种或型及2个相关种,其中约一半的细菌种尚未有从稻种上分离出来的记录。503个菌株对水稻纹枯病菌、水稻叶鞘腐败病菌及水稻细菌性褐条病菌的桔抗性测定表明,在浙江省约占稻种细菌总数12%的菌对一个或多个水稻病原菌具拮抗性,而在吕宋岛约占17%左右。

 
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