Results 251 to 260 of about 3,508,793 (303)

On the photochemical reduction of nitrate by algae

Biochimica et Biophysica Acta, 1953
At high light intensity suspensions of Chlorella pyrenoidosa, supplied with non-limiting concentrations of CO2, produce oxygen at a greater rate when nitrate is simultaneously present. In that case the photosynthetic quotient, CO2/O2, is considerably lower than in the absence of nitrate, even though the rate of CO2 assimilation is not reduced.
C B, VAN NIEL, M B, ALLEN, B E, WRIGHT
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Electrocatalytic reduction of nitrate in water

Water Research, 2003
Nitrate (NO(3)(-)) contamination of groundwater is a common problem throughout intensive agricultural areas (nonpoint source pollution). Current processes (e.g., ion exchange, membrane separation) for NO(3)(-) removal have various disadvantages. The objective of this study was to evaluate an electrocatalytic reduction process to selectively remove NO(3)
J W, Peel, K J, Reddy, B P, Sullivan, J M, Bowen   +3 more
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Nitrate reduction in the genusChromobacterium

Antonie van Leeuwenhoek, 1956
Whether or not a strain ofChromobacterium is able to reduce nitrate completely depends upon the oxygen tension of the medium, the composition of the medium and the length of time the culture is incubated. Based upon action on nitrate only, the genus may be divided into three parts: those which reduce completely with or without gas production, those ...
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Mechanism of nitrate reduction in Chlorella

Biochemical and Biophysical Research Communications, 1969
Abstract In Chlorella , the reduction of nitrate to ammonia takes place in two independent enzymatic steps: 1) the reduction of nitrate to nitrite, involving 2 electrons, catalyzed by NADH-nitrate reductase and 2) the reduction of nitrite to ammonia, involving 6 electrons, catalyzed by ferredoxin-nitrite reductase.
W G, Zumft, A, Paneque, P J, Aparicio, M, Losada   +3 more
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The Assimilatory Reduction of Nitrate

1981
Nitrate reduction by algae and higher plants is one of the most fundamental biological processes by which inorganic oxidized nitrogen is reduced to ammonia with water as the ultimate reductant at the expense of sun energy (Losada and Guerrero, 1979). With the exception of some blue–green algae, and plants that have a symbiotic association with nitrogen-
M. Losada, M. G. Guerrero, J. M. Vega
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Reduction of Nitrate and Nitrite

1979
For most plants in their natural environment, nitrate is the immediate source of nitrogen. This nitrate must be converted to ammonia before it is combined with carbon compounds to form the various nitrogenous components of the cell. Since the nitrogen of nitrate has a formal charge of +5, whereas the nitrogen of ammonia has a formal charge of −3, an 8 ...
B. Vennesland, M. G. Guerrero
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Periplasmic Nitrate Reduction

2014
Before 1980, just two types of bacterial nitrate reductase were widely recognized: these were the soluble, cytoplasmic nitrate reductases involved in nitrate assimilation and the membrane-associated respiratory nitrate reductases. It rapidly became apparent that, in contrast to the more conserved components of the membrane-associated respiratory ...
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Dissimilatory Nitrate Reduction

1981
A number of bacteria employ nitrate and other oxides of nitrogen not simply as a source of nitrogen for synthetic purposes leading to the production of proteins, nucleic acids and other nitrogen-containing Compounds (assimilatory nitrate reduction) but rather as a terminal electron acceptor alternative to oxygen.
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Recent advances in non-noble metal electrocatalysts for nitrate reduction

Chemical Engineering Journal, 2021
Xi Zhang, Cuibo Liu, Yifu Yu
exaly  

Structure Sensitivity of Pd Facets for Enhanced Electrochemical Nitrate Reduction to Ammonia

ACS Catalysis, 2021
Seung Woo Lee, Marta C. Hatzell, Jeonghoon Lim   +2 more
exaly