Results 11 to 20 of about 2,662,632 (251)
The Microbial Nitrogen Cycle [PDF]
Frontiers in Microbiology, 2014 Nitrogen is an essential element in biological systems, and one that often limits production in both aquatic and terrestrial systems. Due to its requirement in biological macromolecules, its acquisition and cycling have the potential to structure microbial communities, as well as to control productivity on the ecosystem scale.
Bess B Ward, Marlene Mark Jensen
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Abstract The nitrogen cycle starts with nitrogen fixation, the reduction of nitrogen gas to ammonia by cyanobacteria and heterotrophic bacteria. In addition to free-living microbes, some nitrogen-fixing cyanobacteria and heterotrophic bacteria are in symbiotic relationships with algae or terrestrial plants.
David L Kirchman, Ashley Shade
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Nitrogen Cycle in Farming Systems
Agronomy, 2023 The challenge for people currently living on Earth is to develop a food production strategy to cover the food gap and at the same time maintain or even improve the soil use production potential [...]
Witold Grzebisz, Alicja Niewiadomska
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Current Biology, 2016 Nitrogen is the fourth most abundant element in cellular biomass, and it comprises the majority of Earth's atmosphere. The interchange between inert dinitrogen gas (N2) in the extant atmosphere and 'reactive nitrogen' (those nitrogen compounds that support, or are products of, cellular metabolism and growth) is entirely controlled by microbial ...
Stein, Lisa Y., Klotz, Martin G.
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Applied Sciences, 2022 The nitrogen cycle is a biogeochemical cycle primarily associated with the microbial activity that occurs in various environments, including soil. Various genes related to the nitrogen cycle have been studied for different purposes by many researchers ...
Siwon Lee +8 more
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Nitrogen cycling in sheep [PDF]
Proceedings of the Nutrition Society, 1973 Introduction Many of the difficulties in predicting the response of ruminants to supplementation of low-protein diets with non-protein nitrogen (NPN) substances arise because there is a lack of information concerning the quantities of N that recycle between the tissues and the N pools in the digestive tract. Various aspects of N mctabolism in ruminants
J V, Nolan, B W, Norton, R A, Leng
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Polar Research, 2020 Nitrate in snow is subject to post-depositional processing, which leads to a net loss and redistribution within the snowpack. The relative importance of post-depositional loss processes such as the volatilization of nitric acid (HNO3) and photolysis of ...
Kazushi Noro, Norimichi Takenaka
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A Synthesis of Viral Contribution to Marine Nitrogen Cycling
Frontiers in Microbiology, 2022 Nitrogen is an essential component of major cellular macromolecules, such as DNA and proteins. Its bioavailability has a fundamental influence on the primary production of both terrestrial and oceanic ecosystems. Diverse marine microbes consume nitrogen,
Shuai Wang +4 more
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Contrasting responses of the ocean’s oxygen minimum zones to artificial re-oxygenation
Environmental Research Letters, 2023 Studies assessing potential measures to counteract the marine deoxygenation attributed to anthropogenic activities have been conducted in a few coastal environments and at regional scale, but not yet on a global scale.
Houda Beghoura +4 more
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Nitrogen and sulfur deposition on regional and global scales : a multimodel evaluation [PDF]
, 2006 [1] We use 23 atmospheric chemistry transport models to calculate current and future (2030) deposition of reactive nitrogen (NOy, NHx) and sulfate (SOx) to land and ocean surfaces.
Galloway, J. +139 more
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