Results 31 to 40 of about 558,186 (382)

Bacterial nitrate assimilation: gene distribution and regulation [PDF]

open access: yes, 2011
In the context of the global nitrogen cycle, the importance of inorganic nitrate for the nutrition and growth of marine and freshwater autotrophic phytoplankton has long been recognized.
Andrew J. Gates   +44 more
core   +1 more source

Biosynthesis and Characterization of Silver Nanoparticles by Aspergillus Species [PDF]

open access: yes, 2016
Currently, researchers turn to natural processes such as using biological microorganisms in order to develop reliable and ecofriendly methods for the synthesis of metallic nanoparticles.
Mehryar, P   +6 more
core   +4 more sources

Highly diverse nirK genes comprise two major clades that harbour ammonium-producing denitrifiers [PDF]

open access: yes, 2016
Background: Copper dependent nitrite reductase, NirK, catalyses the key step in denitrification, i.e. nitrite reduction to nitric oxide. Distinct structural NirK classes and phylogenetic clades of NirK-type denitrifiers have previously been observed ...
Decleyre, Helen   +3 more
core   +3 more sources

Enzymatic Bioelectrosynthetic Ammonia Production: Recent Electrochemistry of Nitrogenase, Nitrate Reductase, and Nitrite Reductase.

open access: yesChemPlusChem, 2017
As an essential component of amino acids and nucleic acids, nitrogen (N) is a key element of life. For atmospheric (dinitrogen, N2 ) and environmental (nitrate and nitrite, NO3 - and NO2 - ) sources of N to be utilized in amino acid synthesis in various ...
Ross D. Milton, S. Minteer
semanticscholar   +1 more source

Migraines Are Correlated with Higher Levels of Nitrate-, Nitrite-, and Nitric Oxide-Reducing Oral Microbes in the American Gut Project Cohort. [PDF]

open access: yes, 2016
Nitrates, such as cardiac therapeutics and food additives, are common headache triggers, with nitric oxide playing an important role. Facultative anaerobic bacteria in the oral cavity may contribute migraine-triggering levels of nitric oxide through the ...
Antonio Gonzalez   +6 more
core   +2 more sources

On The Regulation of Spinach Nitrate Reductase [PDF]

open access: yesPlant Physiology, 1990
A coupled assay has been worked out to study spinach (Spinacea oleracea L.) nitrate reductase under low, more physiological concentrations of NADH. In this assay the reduction of nitrate is coupled to the oxidation of malate catalyzed by spinach NAD-malate dehydrogenase.
Hans W. Heldt, Juan Sanchez
openaire   +3 more sources

Nitric oxide generated by nitrate reductase increases nitrogen uptake capacity by inducing lateral root formation and inorganic nitrogen uptake under partial nitrate nutrition in rice

open access: yesJournal of Experimental Botany, 2015
Highlight NO generated by nitrate reductase plays a pivotal role in improving N-use efficiency by increasing lateral root initiation and inorganic N uptake, representing a strategy for rice to adapt to fluctuating nitrate supply.
Huwei Sun   +8 more
semanticscholar   +1 more source

Biotransformation of explosives by the old yellow enzyme family of flavoproteins [PDF]

open access: yes, 2004
Several independent studies of bacterial degradation of nitrate ester explosives have demonstrated the involvement of flavin-dependent oxidoreductases related to the old yellow enzyme (OYE) of yeast. Some of these enzymes also transform the nitroaromatic
Bruce, N.C.   +3 more
core   +2 more sources

Transposon and deletion mutagenesis of genes involved in perchlorate reduction in Azospira suillum PS. [PDF]

open access: yes, 2013
UnlabelledAlthough much work on the biochemistry of the key enzymes of bacterial perchlorate reduction, chlorite dismutase, and perchlorate reductase has been published, understanding of the molecular mechanisms of this metabolism has been somewhat ...
Clark, Iain C   +3 more
core   +2 more sources

Relationships between nitrate uptake and nitrate reductase activity in Cucumis sativus L.

open access: yesActa Societatis Botanicorum Poloniae, 2014
Anti-NR IgG fragments obtained after papain digestion of polyclonal antibodies gave the positive immunological reaction with both, a soluble and plasma membrane-bound nitrate reductase.
Grażyna Kłobus   +2 more
doaj   +1 more source

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