Results 51 to 60 of about 14,221 (217)
Distribution and rates of nitrogen fixation in the western tropical South Pacific Ocean constrained by nitrogen isotope budgets [PDF]
Biogeosciences, 2018 Constraining the rates and spatial distribution of dinitrogen (N2) fixation fluxes to the ocean informs our understanding of the environmental sensitivities of N2 fixation as well as the timescale over which the fluxes of nitrogen (N) to and from the ...
A. N. Knapp +5 more
doaj +1 more source
Research Progress Report, No. 17 [PDF]
, 1990 Legumes are notable for their ability to convert atmospheric dinitrogen into forms of nitrogen which are usable by plants. This is done in association with bacteria (called Rhizobium) which inhabit nodules of the plant roots.
Cochran, Verlan L. +2 more
core
EcoEnergy, EarlyView.This review systematically compares photocatalytic urea synthesis from various C (CO2, CO, CH3OH) and N (N2, NH3, NO3−) sources. It highlights C–N coupling mechanisms, key challenges, and future directions, offering a framework to guide rational catalyst design for sustainable, solar‐driven urea production.
Bo Ding +5 more
wiley +1 more source
Frontiers in Microbiology, 2020 Cyanobacterial mats in the Antarctic Dry Valleys are photosynthetic microbial ecosystems living at the extreme of conditions on Earth with respect to temperature, light, water and nutrient availability.
Jill A. Sohm +10 more
doaj +1 more source
Dinitrogen fixation by Cyanobacteria
International Journal of Environmental SciencesNitrogen 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 +9 more
openaire +1 more source
Polymer International, EarlyView.Biosurfactant was produced by Pseudomonas aeruginosa using andiroba waste from Amazonia. A biosurfactant–alginate composite (Alg/BioS) was successfully synthesized via ionotropic gelation, and achieved up to 70% Cr6+ removal from water. Abstract Environmental contamination by heavy metals represents a significant challenge due to their persistence in ...
Paulo Diniz Austriaco +11 more
wiley +1 more source
Planted tree fallows and their influence on soil fertility and maize production in East Africa [PDF]
, 2005 Soil fertility depletion is a main constraint to food production in sub-Saharan Africa. This thesis concerns the potential of N2-fixing trees to increase nitrogen inputs to agroforestry systems and accordingly to improve crop production.
Ståhl, Lena
core
Preparation of Rocksalt‐Type Semiconductor Ca2TaN3 via Hot Isostatic Pressing
Zeitschrift für anorganische und allgemeine Chemie, EarlyView.The rocksalt‐type nitride Ca2TaN3 was prepared via hot isostatic pressing at 1400°C and 150 MPa of static dinitrogen pressure. The yellow compound is a semiconductor with a bandgap of 2.5 eV. The rocksalt‐type double nitride Ca2TaN3 was synthesized via hot isostatic pressing (HIP) at 1400°C and 150 MPa static dinitrogen pressure from Ca3N2 and Ta3N5 ...
Adriana Grünwald +3 more
wiley +1 more source
Nitrogen, soils and environment [PDF]
, 2010 The article discusses the risk of damaging the environment brought by nitrogen fertilisers which are used for increasing agricultural productivity. The oxidation of ammonium allows for the formation of nitrate. Troposphere ozone and aerosols are produced
Schipper, Louis A., Sparling, Graham P.
core +1 more source
ChemCatChem, Volume 18, Issue 9, 14 May 2026.Group 6 metal complexes of Cr, Mo, and W supported by N‐heterocyclic carbenes are emerging as versatile platforms for homogeneous catalysis. This review highlights advances in reduction, hydrogen transfer, oxidation, and small molecule activation, revealing how ligand design controls reactivity and opens sustainable alternatives to noble‐metal ...
Beatriz Garcia +2 more
wiley +1 more source