Results 261 to 270 of about 264,167 (309)

Novel microbial nitrogen removal processes

Biotechnology Advances, 2004
The present-day wastewater treatment practices can be significantly improved through the introduction of new microbial treatment technologies. Recently, several new processes for nitrogen removal have been developed. These new nitrogen removal technologies provide practicable options for treating nitrogen-laden wastewaters.
Than, Khin, Ajit P, Annachhatre
openaire   +2 more sources

Effect of Uranium on Microbial Nitrogen Fixation

Zentralblatt für Bakteriologie, Parasitenkunde, Infektionskrankheiten und Hygiene. Zweite Naturwissenschaftliche Abteilung: Allgemeine, Landwirtschaftliche und Technische Mikrobiologie, 1973
Summary The effect of uranyl acetate in the culture media of three different micro-organisms, isolated from Allahabad soil, was studied. It was observed that within 25 μM to 50 μM concentration of uranyl acetate in the culture media there is an increase in nitrogen fixation and a decrease in carbon consumption.
K, Bahadur, U, Jaisal
openaire   +2 more sources

MICROBIAL NITROGEN LIMITATION INCREASES DECOMPOSITION

Ecology, 2007
With anthropogenic nutrient inputs to ecosystems increasing globally, there are long-standing, fundamental questions about the role of nutrients in the decomposition of organic matter. We tested the effects of exogenous nitrogen and phosphorus inputs on litter decomposition across a broad suite of litter and soil types.
Joseph M, Craine, Carl, Morrow, Noah, Fierer   +2 more
openaire   +2 more sources

Quantification of intraruminal recycling of microbial nitrogen using nitrogen-15

Journal of Animal Science, 1992
Studies were done to derive a technique to quantify intraruminal recycling of microbial nonammonia nitrogen (NAN). After dosing 15NH4+ into the rumen, ruminal NH3N and NAN pools were sampled over time for analyses of 15N enrichment. Compartmental analysis of both pools was used to quantify the percentage of microbial NAN that recycles in the rumen ...
J L, Firkins, W P, Weiss, E J, Piwonka
openaire   +2 more sources

Microbial degradation of nitrogen heterocycles

International Biodeterioration & Biodegradation, 2019
Abstract Nitrogen heterocycles are pollutants that are widely prevalent in various environments and have carcinogenic, mutagenic, and genotoxic properties, making them very hazardous to human health. Biodegradation of heterocycles, especially compounds of the pyrrole type, has been an ongoing focal point of research for decades.
Xiaoyu Wang, Ping Xu
openaire   +1 more source

Photoelectrocatalytic‐Microbial Biohybrid for Nitrogen Reduction

Advanced Materials
AbstractNitrogen (N2) conversion to ammonia (NH3) in a mild condition is a big chemical challenge. The whole‐cell diazotrophs based biological NH3 synthesis is one of the most promising strategies. Herein, the first attempt of photoelectrochemical‐microbial (PEC‐MB) biohybrid is contributed for artificial N2 fixation, where Azotobacter vinelandii (A ...
Yingjie Zhang, Tianhang Feng, Xue Zhou, Zhonghai Zhang   +3 more
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Microbial Biogeochemical Cycling of Nitrogen in Arid Ecosystems

Microbiology and Molecular Biology Reviews, 2022
Arid ecosystems cover ∼40% of the Earth’s terrestrial surface and store a high proportion of the global nitrogen (N) pool. They are low-productivity, low-biomass, and polyextreme ecosystems, i.e., with (hyper)arid and (hyper)oligotrophic conditions and high surface UV irradiation and evapotranspiration.
Jean-Baptiste Ramond, Karen Jordaan, Beatriz Díez, Sandra M. Heinzelmann, Don A. Cowan   +4 more
openaire   +3 more sources

Microbial associations enabling nitrogen acquisition in plants

Current Opinion in Microbiology, 2019
Large flows of nitrogen between the atmosphere, terrestrial and aquatic ecosystems contribute to the global cycle on Earth. When balanced, this cycle ensures that life at every level can flourish and diversify. However, in the past 50 years, humans have had a large, negative influence on nitrogen cycle pushing it beyond safe boundaries at the global ...
Ke, Tao, Simon, Kelly, Simona, Radutoiu
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Nitrogen transformations in stratified aquatic microbial ecosystems

Antonie van Leeuwenhoek, 2006
New analytical methods such as advanced molecular techniques and microsensors have resulted in new insights about how nitrogen transformations in stratified microbial systems such as sediments and biofilms are regulated at a microm-mm scale. A large and ever-expanding knowledge base about nitrogen fixation, nitrification, denitrification, and ...
Revsbech, N. P., Risgaard-Petersen, N., Schramm, A., Nielsen, L. P.   +3 more
openaire   +3 more sources

Microbial fixation of nitrogen in presence of sodium tungstate

Zentralblatt für Bakteriologie, Parasitenkunde, Infektionskrankheiten und Hygiene. Zweite Naturwissenschaftliche Abteilung: Mikrobiologie der Landwirtschaft, der Technologie und des Umweltschutzes, 1978
The effect of sodium tungstate in the culture media of three different species of Azotobacter, isolated from Allahabad soil, was studied. It was observed that the presence of tungstate in the culture media of bacterial sample A2 and A3 decreased the fixation of nitrogen, except in the bacterial sample A1.
K, Bahadur, U, Jyotishmati
openaire   +2 more sources