Results 151 to 160 of about 465,287 (202)

No N2 fixation in the Bay of Bengal?

2020
<p>The Bay of Bengal (BoB) has long stood as a biogeochemical enigma with subsurface waters containing extremely low, but persistent, concentrations of oxygen (O<sub>2</sub>) in the nanomolar range which - for some, yet unconstrained reason- are prevented from becoming anoxic.
Carolin Löscher, Wiebke Mohr, Hermann Bange, Donald Canfield   +3 more
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N2-fixation in Erwinia herbicola

Archives of Microbiology, 1979
Four from 18 strains of Erwinia herbicola tested had nitrogenase activity and grew with N2 as sole source of nitrogen under strict anaerobic conditions with a doubling time of 20–24 h. Nitrogenase activity started only 96–120 h after transfer to a special medium maintained under anaerobic conditions.
Hans Papen, Dietrich Werner
openaire   +1 more source

N2 fixation by purified components of the N2-fixing system of Clostridium pasteurianum

Biochimica et Biophysica Acta (BBA) - Bioenergetics, 1968
Abstract 1. N 2 fixation, reductant-supported ATP utilization and ATP-dependent H 2 evolution are catalyzed by combined molybdoferredoxin and azoferredoxin, the two purified components of the N 2 -fixing system of Clostridium pasteurianum . No additional protein components are needed. At this stage of purity, neither of the two components of the N
I R, Kennedy, J A, Morris, L E, Mortenson   +2 more
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Enhanced photocatalytic N2 fixation by promoting N2 adsorption with a co-catalyst

Science Bulletin, 2019
Photocatalytic N2 fixation involves a nitrogen reduction reaction on the surface of the photocatalyst to convert N2 into ammonia. Currently, the adsorption of N2 is the limiting step for the N2 reduction reaction on the surface of the catalyst. Based on the concept of photocatalytic water splitting, the photocatalytic efficiency can be greatly enhanced
Xiang, Gao, Li, An, Dan, Qu, Wenshuai, Jiang, Yanxiao, Chai, Shaorui, Sun, Xingyuan, Liu, Zaicheng, Sun   +7 more
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Inhibition of N2 Fixation by H2

1984
Li and Burris (Biochemistry, in press) demonstrated the formation of HD from D2 with nitrogenase preparations from Azotobacter vinelandii, Clostridium pasteurianum, Klebsiella pneumoniae and Azospirlllum sp. From these observations it is concluded that the ability to form HD is a general property of nitrogenases.
Joseph H. Guth, Robert H. Burris
openaire   +1 more source

Biogeography of N2 Fixation in the Surface Ocean

2021
Diazotrophs and N2 fixation are not homogenously distributed across the oceans, but have distinct patterns of rates, abundances and species composition. These patterns reflect the dynamic processes in the ocean and atmosphere and the distribution of nutrients, particularly P and Fe.
Jonathan P. Zehr, Douglas G. Capone
openaire   +1 more source

Proline inhibits N2-fixation in Anabaena 7120

Biochemical and Biophysical Research Communications, 1986
The uptake and metabolism of proline by Anabaena 7120 is demonstrated. Uptake is linear over the first hour and it appears that the rate of proline oxidation is sufficient to account for growth is suggested by the finding that exogenous proline represses heterocyst differentiation and inhibits nitrogen fixation in Anabaena 7120, without affecting ...
D W, Spence, W D, Stewart
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Associative N2 Fixation with Azospirillum

1984
The association of specific microorganisms with plant roots is an ancient observation. The most obvious examples are pathogenic in nature, where the effects of the microorganism on the plant are usually plainly visible as damage to root tissue, which is also often devastating to the health of the host plant.
David H. Hubbell, Murray H. Gaskins
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History of Research on Marine N2 Fixation

2021
Research into phytoplanktonic N2-fixers in the oceans such as the cyanobacterium Trichodesmium dates back to early marine phycological studies in the late 1800s, predating the knowledge that these organisms were actively fixing N2. Research into the quantitative role of N2 fixers surged in the early 1960s with the advent of new techniques to measure ...
Jonathan P. Zehr, Douglas G. Capone
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The influence of shading on associative N2 fixation

Plant and Soil, 1984
The effect of reduced solar radiation on associative N2-fixation and plant parameters was studied in three field experiments (1978–80). ‘Gahi-3’ pearl millet (Pennisetum americanum (L.) K. Monch.) field plots were shaded with saran shade cloth that reduced solar radiation by 50% and 75%.
Rex L. Smith, S. C. Schank, R. C. Littell   +2 more
openaire   +1 more source