Results 51 to 60 of about 347,780 (327)

Electrochemical titrations and reaction time courses monitored in situ by magnetic circular dichroism spectroscopy [PDF]

open access: yes, 2011
Magnetic circular dichroism (MCD) spectra, at ultraviolet–visible or near-infrared wavelengths (185–2000 nm), contain the same transitions observed in conventional absorbance spectroscopy, but their bisignate nature and more stringent selection rules ...
Abramson   +52 more
core   +1 more source

Nitrate and nitrite reductase activities of Mycobacterium avium

open access: yesInternational Journal of Mycobacteriology, 2018
Background: In spite of the fact that the standard test for nitrate reductase activity is negative for Mycobacterium avium, it can grow in a defined minimal medium with either nitrate (NO3) or nitrite (NO2) as sole nitrogen sources.
Nitin S Butala, Joseph Oliver Falkinham
doaj   +1 more source

Synthetic and Evolutionary Construction of a Chlorate-Reducing Shewanella oneidensis MR-1. [PDF]

open access: yes, 2015
UnlabelledDespite evidence for the prevalence of horizontal gene transfer of respiratory genes, little is known about how pathways functionally integrate within new hosts.
Carlson, Hans K   +5 more
core   +3 more sources

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   +5 more sources

Influence of lead on N03 uptake and reduction in cucumber seedlings

open access: yesActa Societatis Botanicorum Poloniae, 2014
The influence of PbCl2 on NO3- uptake and activity level of nitrate (NR) and nitrite MR) reductases in cotyledons and roots of cucumber seedlings was studied.
Marek Burzyński, Adam Grabowski
doaj   +1 more source

Dissimilatory nitrogen reduction in intertidal sediments of a temperate estuary: small scale heterogeneity and novel nitrate-to-ammonium reducers [PDF]

open access: yes, 2015
The estuarine nitrogen cycle can be substantially altered due to anthropogenic activities resulting in increased amounts of inorganic nitrogen (mainly nitrate).
Decleyre, Helen   +3 more
core   +2 more sources

Isoform-Specific NO Synthesis by Arabidopsis thaliana Nitrate Reductase

open access: yesPlants, 2019
Nitrate reductase (NR) is important for higher land plants, as it catalyzes the rate-limiting step in the nitrate assimilation pathway, the two-electron reduction of nitrate to nitrite.
Marie Agatha Mohn   +2 more
doaj   +1 more source

Quorum sensing systems regulate heterotrophic nitrification-aerobic denitrification by changing the activity of nitrogen-cycling enzymes

open access: yesEnvironmental Science and Ecotechnology, 2020
Heterotrophic nitrification-aerobic denitrification (HNAD) is essential in diverse nitrogen-transforming processes. How HNAD is modulated by quorum sensing (QS) systems is still ambiguous.
Ziqian Zhu   +6 more
doaj   +1 more source

Metabolic network analysis reveals microbial community interactions in anammox granules. [PDF]

open access: yes, 2017
Microbial communities mediating anaerobic ammonium oxidation (anammox) represent one of the most energy-efficient environmental biotechnologies for nitrogen removal from wastewater.
Bhattacharjee, Ananda S   +6 more
core   +2 more sources

Intramolecular Electron Transfer in Nitrite Reductases [PDF]

open access: yesChemPhysChem, 2005
AbstractThe copper‐ and heme‐containing nitrite reductases (NiRs) are key enzymes in denitrification. Their subunits contain two distinct redox‐active metal centers, an electron‐accepting site and a nitrite‐reducing site, to carry out the single‐electron reduction of nitrite to nitic oxide. Catalytic cycles of both enzyme families employ intramolecular
Scot, Wherland   +2 more
openaire   +2 more sources

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