Results 71 to 80 of about 14,969 (264)
Journal of Geophysical Research: Biogeosciences, Volume 130, Issue 8, August 2025.Abstract Nitrogen isotope (δ15N) values in ancient rocks have been used to interpret the presence of nitrogen metabolisms and fixed N availability across the Archean and Paleoproterozoic eons. However, how δ15N signals produced by nitrogen metabolisms of microbial communities, the impact of the geochemical environments they live in on those signals ...
J. R. Havig, T. L. Hamilton
wiley +1 more source
Адгезия на корнях огурцов бактерий – компонентов препаратов для растениеводства [PDF]
, 2007 Установлено, что на адгезию бактерий Azotobacter vinelandii и Bacillus subtilis на корнях огурцов могут оказывать влияние различные факторы. Основным условием увеличения эффективности прикрепления клеток бацилл является снижение отрицательного заряда их ...
Бега, З.Т. +3 more
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Classifying the metal dependence of uncharacterized nitrogenases [PDF]
, 2013 Nitrogenase enzymes have evolved complex iron–sulfur (Fe–S) containing cofactors that most commonly contain molybdenum (MoFe, Nif) as a heterometal but also exist as vanadium (VFe, Vnf) and heterometal-independent (Fe-only, Anf) forms.
Boyd, Eric S. +3 more
core +2 more sources
Plasmid Transformation of Azotobacter vinelandii OP [PDF]
Microbiology, 1987 Azotobacter vinelandii OP which had been naturally induced to competence by growth in iron- and molybdenum-limited medium was transformed with the broad-host-range cloning vector pKT210. However, the transformation frequency at nearly saturating levels of DNA was 1000-fold lower for pKT210 than for a single chromosomal DNA marker (nif+).
Kenneth L. Roy +4 more
openaire +3 more sources
ModE Regulates Alternative Nitrogenase Expression in the Methanogen Methanosarcina acetivorans
Molecular Microbiology, Volume 124, Issue 2, Page 105-114, August 2025.During nitrogen fixation, the methanogen Methanosarcina acetivorans produces the alternative vanadium‐nitrogenase and iron‐nitrogenase only when molybdenum is unavailable to support the activity of molybdenum‐nitrogenase. Our work demonstrates that the expression of the alternative nitrogenases in M.
Melissa Chanderban, Daniel J. Lessner
wiley +1 more source
Two Key Ferredoxins for Nitrogen Fixation Have Different Specificities and Biophysical Properties
Chemistry – A European Journal, Volume 31, Issue 37, July 2, 2025.Two ferredoxins, FdC and FdN, are collectively essential for the process of nitrogen fixation by the iron nitrogenase in R. capsulatus. We explore the biophysical factors, through spectroscopic and structural characterizations, which determine ferredoxin functionality and pathway specificity. The structure of FdC (PDB: 9I2A) and model of FdN (AF‐D5ARY6)
Holly Addison +5 more
wiley +1 more source
A CRISPR interference system for engineering biological nitrogen fixation
mSystemsA grand challenge for the next century is in facing a changing climate through bioengineering solutions. Biological nitrogen fixation, the globally consequential, nitrogenase-catalyzed reduction of atmospheric nitrogen to bioavailable ammonia, is a vital
Steven J. Russell +2 more
doaj +1 more source
Scientific Reports, 2017 Azotobacter vinelandii, a strict aerobic, nitrogen fixing bacterium in the Pseudomonadaceae family, exhibits a preferential use of acetate over glucose as a carbon source.
Elva Quiroz-Rocha +8 more
doaj +1 more source
Role of the PAS2 domain of the NifL regulatory protein in redox signal transduction [PDF]
, 2010 EThOS - Electronic Theses Online ServiceGBUnited ...
Slavny, Peter
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Biological Routes for Biohydrogen Production: A Clean and Carbon‐Free Fuel
Biotechnology Journal, Volume 20, Issue 7, July 2025.Graphical Abstract and Lay Summary Biological routes for hydrogen (H2) production are mainly classified into four pathways: 1) direct bio‐photolysis, 2) indirect bio‐photolysis, 3) photo‐fermentation, and 4) dark fermentation. Of these pathways, dark fermentation produces the highest levels of H2 production.
Minseok Cha +2 more
wiley +1 more source