نتایج جستجو برای: microbial populations

تعداد نتایج: 343096  

Journal: :Applied and Environmental Microbiology 1976

2014
Subhajit Das Tarun kumar Sarkar Minati De Dipnarayan Ganguly Tusher kanti Maiti Abhishek Mukherjee Tapan kumar Jana Tarun Kumar De

Populations of culturable microbes and activeties of dehydrogenase & β-D glucosidase were found maximum in surface soil and decreased with increase in depth in Sundarban mangrove environment. The maximum (13.529 × 10 C.F.U g dry weight of soil) and minimum (11.547 × 10 C.F.U g dry weight of soil) total microbial populations in surface soil were recorded during post-monsoon and monsoon respectiv...

Journal: :Journal of microbiology, immunology, and infection = Wei mian yu gan ran za zhi 2006
Shang Shyng Yang Shu Hsien Tsai Hsiao Yun Fan Chiun Kai Yang Wei Lan Hung Shine Tsern Cho

BACKGROUND AND PURPOSE Forest soil microorganisms and fauna decompose the organic materials, and thus strongly influence the nutrient cycling of the ecosystem. Soil microorganisms also contribute to soil structure and soil fertility. In Taiwan, the microbial distributions of soils have only been determined in acidic soil, inorganic acidic soil, upland soil, alkaline soil and power plant areas. ...

2007
M. S. Zaki

The purpose of this paper is to offer a complete global analysis of the behavior of solutions of either the variable yield two microbial growths, limited by a single scare nutrient, or of competition between two microbial populations for a single limiting nutrient. Basically, we confirm that the variable yield models make the same predictions concerning the growth of a single population and con...

2013
Katherine R. Kerr Genevieve Forster Scot E. Dowd Elizabeth P. Ryan Kelly S. Swanson

BACKGROUND Cooked bean powders are a promising novel protein and fiber source for dogs, which have demonstrated potential to alter microbial composition and function for chronic disease control and prevention. This study aimed to determine the impact of cooked navy bean powder fed as a staple food ingredient on the fecal microbiome of healthy adult pet dogs. METHODOLOGY/PRINCIPAL FINDINGS Fec...

2013
Hans Jacquemyn Marijke Lenaerts Rein Brys Kris Willems Olivier Honnay Bart Lievens

BACKGROUND Microbial communities in floral nectar have been shown to be characterized by low levels of species diversity, yet little is known about among-plant population variation in microbial community composition. METHODOLOGY/PRINCIPAL FINDINGS We investigated the microbial community structure (yeasts and bacteria) in floral nectar of ten fragmented populations of the bee-pollinated forest...

2011
James R. Doroghazi Daniel H. Buckley

The effect of homologous recombination (HR) on the evolution of microbial genomes remains contentious as competing hypotheses seek to explain the evolutionary dynamics of microbial species. Evidence for HR between microbial genomes is widespread, and this process has been proposed to act as a cohesive force that can constrain the diversification of microbial lineages. We seek to characterize th...

Journal: :Philosophical transactions of the Royal Society of London. Series B, Biological sciences 2007
Grace Yim Helena Huimi Wang Julian Davies

We present the argument that the majority of low-molecular-weight organic compounds made and secreted by microbes play roles as cell-signalling molecules in the environment. Of the large number of compounds isolated to date, only a small fraction have been shown to possess useful therapeutic antibiotic activity. However, most microbial metabolites modulate gene transcription at low concentratio...

Journal: :Molecular ecology 2006
Jianping Xu

Microbial ecology examines the diversity and activity of micro-organisms in Earth's biosphere. In the last 20 years, the application of genomics tools have revolutionized microbial ecological studies and drastically expanded our view on the previously underappreciated microbial world. This review first introduces the basic concepts in microbial ecology and the main genomics methods that have be...

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