Results 41 to 50 of about 482,318 (212)

Preliminary estimates of the contribution of Arctic nitrogen fixation to the global nitrogen budget

Limnology and Oceanography Letters, 2017
Dinitrogen (N2) fixation is the source of all biologically available nitrogen on earth, and its presence or absence impacts net primary production and global biogeochemical cycles.
Rachel E. Sipler, Donglai Gong, Steven E. Baer, Marta P. Sanderson, Quinn N. Roberts, Margaret R. Mulholland, Deborah A. Bronk   +6 more
doaj   +1 more source

Planktonic Aggregates as Hotspots for Heterotrophic Diazotrophy: The Plot Thickens

Frontiers in Microbiology, 2022
Biological dinitrogen (N2) fixation is performed solely by specialized bacteria and archaea termed diazotrophs, introducing new reactive nitrogen into aquatic environments.
Lasse Riemann, Eyal Rahav, Uta Passow, Hans-Peter Grossart, Hans-Peter Grossart, Dirk de Beer, Isabell Klawonn, Meri Eichner, Mar Benavides, Mar Benavides, Edo Bar-Zeev   +10 more
doaj   +1 more source

Dinitrogen Fixation Across Physico‐Chemical Gradients of the Eastern Tropical North Pacific Oxygen Deficient Zone

Global Biogeochemical Cycles, 2019
The Eastern Tropical North Pacific Ocean hosts one of the world's largest oceanic oxygen deficient zones (ODZs). Hot spots for reactive nitrogen (Nr) removal processes, ODZs generate conditions proposed to promote Nr inputs via dinitrogen (N2) fixation ...
C. Selden, M. Mulholland, P. Bernhardt, Brittany Widner, A. Macías-Tapia, Q. Ji, A. Jayakumar   +6 more
semanticscholar   +1 more source

The effect of oxygen concentration and temperature on nitrogenase activity in the heterocystous cyanobacterium Fischerella sp.

Scientific Reports, 2017
Heterocysts are differentiated cells formed by some filamentous, diazotrophic (dinitrogen-fixing) cyanobacteria. The heterocyst is the site of dinitrogen fixation providing the oxygen-sensitive nitrogenase with a low-oxygen environment.
Lucas J. Stal
doaj   +1 more source

Soybeans Grown with Carbonaceous Nanomaterials Maintain Nitrogen Stoichiometry by Assimilating Soil Nitrogen to Offset Impaired Dinitrogen Fixation.

ACS Nano, 2019
Engineered nanomaterials (ENMs) can enter agroecosystems because of their widespread use and disposal. Within soil, ENMs may affect legumes and their dinitrogen (N2) fixation that are critical for food supply and N-cycling.
Ying Wang, J. Schimel, R. Nisbet, J. Gardea-Torresdey, P. Holden   +4 more
semanticscholar   +1 more source

Bismuth Chalcogenide‐Based Photocatalysts for Nitrogen Reduction: Recent Progress and Prospects

Chemistry – A European Journal, EarlyView.
Bismuth chalcogenides emerge as promising visible‐light photocatalysts for sustainable ammonia synthesis, driven by tunable electronic structures and strong N2 activation. Recent advances reveal how defects, doping and heterojunction design synergistically enhance charge separation and reactivity. Key challenges and future directions highlight pathways
Mukesh K. Verma, Muhammad D. Bala, Phindile B. Khoza, Tshephiso R. Papo, Mzamo L. Shozi   +4 more
wiley   +1 more source

Phenotypic heterogeneity in metabolic traits among single cells of a rare bacterial species in its natural environment quantified with a combination of flow cell sorting and NanoSIMS

Frontiers in Microbiology, 2015
Populations of genetically identical microorganisms residing in the same environment can display marked variability in their phenotypic traits; this phenomenon is termed phenotypic heterogeneity. The relevance of such heterogeneity in natural habitats is
Matthias eZimmermann, Matthias eZimmermann, Stéphane eEscrig, Thomas eHübschmann, Mathias eKirf, Andreas eBrand, Andreas eBrand, R Fredrik Inglis, R Fredrik Inglis, Niculina eMusat, Susann eMüller, Anders eMeibom, Anders eMeibom, Martin eAckermann, Martin eAckermann, Frank eSchreiber, Frank eSchreiber   +16 more
doaj   +1 more source

Nonthermal Plasma–Enabled Cascade N2 Activation and Electroreduction

EcoEnergy, EarlyView.
Integrating plasma‐assisted NOx synthesis with subsequent electrochemical reduction enables the sustainable synthesis of high‐value N‐containing chemicals under ambient conditions. ABSTRACT The development of sustainable nitrogen fixation technologies operating under ambient conditions is critical for reducing the energy intensity and carbon footprint ...
Shijia Li, Wei Gao, Ziyun Wang
wiley   +1 more source

Dinitrogen fixation by Cyanobacteria

International Journal of Environmental Sciences
Nitrogen is the most abundant element in the Earth’s atmosphere in the form of di-nitrogen gas; it is not assimilable by plants or any other organism as such. Biological Nitrogen Fixation (BNF) is carried out by a specialized group of prokaryotes, like Cyanobacteria.
Vandana Gupta, Vishal Saxena, Piyush Mishra, Sunil Kumar Singh, Alka Kushwaha, Pratibha Gupta, Devendra Pratap Rao, Vinod Kumar Dubey, Kuldeep Kumar, Gyan Prakash Gupta   +9 more
openaire   +1 more source

Optimising Sulphur Fertilisation in Ryegrass–White Clover Swards Reduces Leached Nitrate Nitrogen Losses, While Increasing Plant Yield and Nitrogen Off‐Take

Journal of Plant Nutrition and Soil Science, EarlyView.
The inclusion of sulphur at two inorganic nitrogen rates (0 and 150 kg N ha−1) improves plant productivity in a ryegrass–white clover sward and reduces nitrate‐N loss to groundwater in a free‐draining sandy loam soil. ABSTRACT Background Reducing nitrogen (N) losses to water, lessening reliance on inorganic fertiliser and maintaining agricultural ...
Donal Kinsella, Imelda A. Casey, Patrick J. Forrestal   +2 more
wiley   +1 more source