نتایج جستجو برای: microbial nitrogen

تعداد نتایج: 225216  

Journal: :The British journal of nutrition 1958
R A WELLER F V GRAY A F PILGRIM

An estimate of the extent of conversion of plant nitrogen to microbial nitrogen in the rumen of sheep fed on wheaten hay was reported in an earlier communication (Gray & Pilgrim, 1953). The basis of separation of plant from microbial material was simply the filtration of the rumen contents through muslin with subsequent limited washing of the fibrous plant residues to free them from the remaini...

2015
Fan Zhang Frank T. Robb Jianmin Zhang

Title of Dissertation: ROLES OF THE SYMBIOTIC MICROBIAL COMMUNITIES ASSOCIATED WITH SPONGE HOSTS IN THE NITROGEN AND PHOSPHORUS CYCLES Fan Zhang, Doctor of Philosophy, 2015 Directed By: Dr. Russell T. Hill, Professor, Institute of Marine and Environmental Technology, University of Maryland Center for Environmental Science Marine sponges are habitat-forming organisms in coral reefs. Many sponge ...

Journal: :Journal of environmental quality 2010
Brandon C Iker Pat Kambesis Stuart A Oehrle Chris Groves Hazel A Barton

In the absence of sunlight energy, microbial community survival in subterranean aquifers depends on integrated mechanisms of energy and nutrient scavenging. Because karst aquifers are particularly sensitive to agricultural land use impacts due to rapid and direct hydrologic connections for pollutants to enter the groundwater, we examined the fate of an exogenous pesticide (atrazine) into such a...

2018
Min Ren Zhufeng Zhang Xuelian Wang Zhiwei Zhou Dong Chen Hui Zeng Shumiao Zhao Lingling Chen Yuanliang Hu Changyi Zhang Yunxiang Liang Qunxin She Yi Zhang Nan Peng

Arid and semi-arid regions comprise nearly one-fifth of the earth's terrestrial surface. However, the diversities and functions of their soil microbial communities are not well understood, despite microbial ecological importance in driving biogeochemical cycling. Here, we analyzed the geochemistry and microbial communities of the desert soils from Tarim Basin, northwestern China. Our geochemica...

2015
Alicia K. Williams Allison S. McInnes Jay R. Rooker Antonietta Quigg Rodolfo Paranhos

Mesoscale circulation generated by the Loop Current in the Northern Gulf of Mexico (NGOM) delivers growth-limiting nutrients to the microbial plankton of the euphotic zone. Consequences of physicochemically driven community shifts on higher order consumers and subsequent impacts on the biological carbon pump remain poorly understood. This study evaluates microbial plankton <10 μm abundance and ...

2014
Jon Telling Alexandre M. Anesio Martyn Tranter Andrew G. Fountain Thomas Nylen Jon Hawkings Virendra B. Singh Preeti Kaur Michaela Musilova Jemma L. Wadham

The seasonal melting of ice entombed cryoconite holes on McMurdo Dry Valley glaciers provides oases for life in the harsh environmental conditions of the polar desert where surface air temperatures only occasionally exceed 0°C during the Austral summer. Here we follow temporal changes in cryoconite hole biogeochemistry on Canada Glacier from fully frozen conditions through the initial stages of...

2016
S. Foiklang M. Wanapat T. Norrapoke

This study was designed to investigate the effect of grape pomace powder (GPP), mangosteen peel powder (MPP) and monensin on feed intake, nutrients digestibility, microorganisms, rumen fermentation characteristic, microbial protein synthesis and nitrogen balance in dairy steers. Four, rumen fistulated dairy steers with initial body weight (BW) of 220±15 kg were randomly assigned according to a ...

2011
Olfa Fourti Naceur Jedidi Abdennaceur Hassen

Problem statement: The aim of this study was mainly focused on the evolution of microbial biomasses C and N during the composting of municipal solid wastes. Approach: The carbon and the nitrogen of the microbial biomass (BC and BN) were studied using the fumigation-extraction method. Results: The dynamics of the BC/BN ratio, index of the chemical composition of the whole microbial population su...

2003
Tolessa Deksissa Peter A. Vanrolleghem

• Including biofilm processes in the organic contaminant fate model in rivers is very important, especially in shallow rivers. • The nutrient load dynamics can affect the fate of organic contaminants, and thus including nutrients in the organic contaminant fate modelling is necessary. • The sensitivity of LAS degradation to the ammonia nitrogen is an interesting finding and can induce further r...

Journal: :علوم و فنون بسته بندی 0
مژده خراسانی حبیب اله میرزایی یحیی مقصودلو

in this study, the effect of gelatin-chitosan edible coating on the quality of chicken breast during 9 days of refrigerated storage (4 was investigated. three concentrations of gelatin (3, 6 and 8% w/v) and two concentrations of chitosan (1 and 2% w/v) were used to prepare the coating materials. samples was divided in 7 group, no coating (control), gelatin 3% and chitosan 1% (sample 2), gelatin...

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