Results 31 to 40 of about 5,806,549 (219)
Repression, Derepression and Activation of Nitrogenase in Azotobacter Vinelandii [PDF]
Australian Journal of Biological Sciences, 1976 Ammonium ions repressed nitrogenase in cells fixing N2 gas. Immunological tests and electrophoresIs in various gels show that component I (Fe-Mo-S protein) was completely repressed by ammonium, whereas component II (Fe-S protein) apoprotein was not markedly affected.
D J, Nicholas, J V, Deering
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Angewandte Chemie, EarlyView.Directional control within the secondary coordination sphere redefines CO2 reduction by iron porphyrins. Simply rearranging identical urea hydrogen‐bond donors modulates reactivity, revealing that optimal catalysis does not only arise from maximal intermediate stabilization, but also from directional, adaptive non‐covalent interactions that balance ...
Ashutosh Vishwakarma +7 more
wiley +2 more sources
Activation of CO2 by Vanadium Nitrogenase
Chemistry – An Asian Journal, 2017 AbstractThe reduction of CO2 into useful products, including hydrocarbon fuels, is an ongoing area of particular interest due to efforts to mitigate buildup of this greenhouse gas. While the industrial Fischer–Tropsch process can facilitate the hydrogenation of CO2 with H2 to form short‐chain hydrocarbon products under high temperatures and pressures ...
Nathaniel S, Sickerman +2 more
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Oxygen inactivation and recovery of nitrogenase activity in cyanobacteria [PDF]
Journal of Bacteriology, 1983 Exposure of nitrogen-fixing cultures of Anabaena spp. to 100% oxygen resulted in the rapid decline of nitrogenase activity. When oxygen-treated cells were transferred to 100% argon, nitrogenase activity was quickly restored in a process that required protein synthesis.
P T, Pienkos, S, Bodmer, F R, Tabita
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Angewandte Chemie, EarlyView.Self‐assembled tetrahedral CoI4 clusters supported by simple bipyridine‐based ligands undergo core rearrangement to cleave S─F and C(sp2)─F bond, forming fluoride‐bridged tetracobalt(II)‐oxo clusters, while exposure of cobalt(I) clusters to molecular oxygen yields cubane‐type cobalt(III) oxo clusters.
Hoan M. Dinh +4 more
wiley +2 more sources
Engineering Nitrogen Fixation Activity in an Oxygenic Phototroph
mBio, 2018 Biological nitrogen fixation is catalyzed by nitrogenase, a complex metalloenzyme found only in prokaryotes. N2 fixation is energetically highly expensive, and an energy-generating process such as photosynthesis can meet the energy demand of N2 fixation.
Deng Liu +4 more
doaj +1 more source
Ammonium inhibition of nitrogenase activity in Herbaspirillum seropedicae [PDF]
Journal of Bacteriology, 1989 The effect of oxygen, ammonium ion, and amino acids on nitrogenase activity in the root-associated N2-fixing bacterium Herbaspirillum seropedicae was investigated in comparison with Azospirillum spp. and Rhodospirillum rubrum. H. seropedicae is microaerophilic, and its optimal dissolved oxygen level is from 0.04 to 0.2 kPa for dinitrogen fixation but ...
H, Fu, R H, Burris
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Gain‐of‐Function Engineering of the NifEN Scaffold Into a Self‐Assembling Nitrogenase
Angewandte Chemie, EarlyView.From scaffold to enzyme: Systematic engineering of the cofactor maturation scaffold NifEN reconstructs the P→M electron relay along with cofactor coordination and proton gating at the S2B site, converting NifEN into a functional nitrogenase capable of ATP‐dependent N2 reduction both in vitro and in vivo.
Yimo Yang +4 more
wiley +2 more sources
Nitrogenase Activity and Photosynthesis in Plectonema boryanum [PDF]
Journal of Bacteriology, 1974 Nitrogen-starved Plectonema boryanum 594 cultures flushed with N 2 /CO 2 or A/CO 2 (99.7%/0.3%, vol/vol) exhibited nitrogenase activity when assayed either by acetylene reduction or hydrogen evolution. Oxygen evolution activities and phycocyanin
N M, Weare, J R, Benemann
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Al-Kauniyah Jurnal Biologi, 2016 Abstrak Penambatan nitrogen oleh bakteri rhizosfer dapat dimanfaatkan untuk menyiasati dampak salinitas pada tanah sawah pesisir. Kemampuan tersebut disebabkan oleh aktivitas nitrogenase yang disandikan gen nifH pada komponen II.
Dwi Ningsih Susilowati, Mamik Setyowati
doaj +1 more source