Results 11 to 20 of about 43,948 (300)
Effect of pH and nitrite concentration on nitrite oxidation rate [PDF]
Bioresource Technology, 2011 The effect of pH and nitrite concentration on the activity of the nitrite oxidizing bacteria (NOB) in an activated sludge reactor has been determined by means of laboratory batch experiments based on respirometric techniques. The bacterial activity was measured at different pH and at different total nitrite concentrations (TNO₂).
Jiménez Douglas, Emérita +4 more
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Microbial niche differentiation explains nitrite oxidation in marine oxygen minimum zones. [PDF]
ISME J, 2021 Nitrite is a pivotal component of the marine nitrogen cycle. The fate of nitrite determines the loss or retention of fixed nitrogen, an essential nutrient for all organisms.
Sun X +4 more
europepmc +2 more sources
Nitric oxide preferentially inhibits nitrite oxidizing communities with high affinity for nitrite [PDF]
Journal of Biotechnology, 2015 The prerequisite to the development success of the novel mainstream processes partial nitritation/anammox is the out-selection of nitrite oxidizing bacteria (NOB). A recent study suggested that this could be achieved through NO production by ammonium oxidizing bacteria under cyclic oxic-anoxic conditions. Indeed, it is known that among NOB, Nitrobacter
Courtens, Emilie +6 more
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Nitroxyl Accelerates the Oxidation of Oxyhemoglobin by Nitrite [PDF]
Free Radical Biology and Medicine, 2011 Angeli's salt (Na₂N₂O₃) decomposes into nitroxyl (HNO) and nitrite (NO₂(-)), compounds of physiological and therapeutic interest for their impact on biological signaling both through nitric oxide and nitric oxide independent pathways. Both nitrite and HNO oxidize oxygenated hemoglobin to methemoglobin.
Landon, Bellavia +4 more
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Cyclic Conversions in the Nitrogen Cycle
Frontiers in Microbiology, 2021 The cyclic nature of specific conversions in the nitrogen cycle imposes strict limitations to the conversions observed in nature and explains for example why anaerobic ammonium oxidation (anammox) bacteria can only use nitrite – and not nitrate – as ...
Robbert Kleerebezem, Sebastian Lücker
doaj +1 more source
Iraqi Journal of Pharmaceutical Sciences, 2017 Free radical formation in heme proteins is recognized as a factor in mediating the toxicity of many chemicals. The present study was designed to evaluate the dose-response relationship of the free radical scavenging properties of pentoxifylline in ...
Tavga A. Aziz
doaj +5 more sources
Comparison of Oxidation Kinetics of Nitrite-Oxidizing Bacteria: Nitrite Availability as a Key Factor in Niche Differentiation [PDF]
Applied and Environmental Microbiology, 2015 ABSTRACT Nitrification has an immense impact on nitrogen cycling in natural ecosystems and in wastewater treatment plants. Mathematical models function as tools to capture the complexity of these biological systems, but kinetic parameters especially of nitrite-oxidizing bacteria (NOB) are lacking because of a limited number of ...
Nowka, Boris, Daims, Holger, Spieck, Eva
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Testing the influence of light on nitrite cycling in the eastern tropical North Pacific [PDF]
BiogeosciencesLight is considered a strong controlling factor of nitrification rates in the surface ocean. Previous work has shown that ammonia oxidation and nitrite oxidation may be inhibited by high light levels, yet active nitrification has been measured in the ...
N. M. Travis +5 more
doaj +1 more source
Foods, 2021 The effect of nitrate/nitrite (0, 37.5, 75, and 150 mg/kg) in the dry-cured loin formulation on the formation of lipid and protein oxidation products during in vitro digestion was evaluated.
Guadalupe Lavado +3 more
doaj +1 more source
Journal of Japan Society on Water Environment, 2008 A factor that controls maximum cell-specific nitrite oxidation rate was examined using the enrichment culture of Nitrobacter. Increasing or decreasing nitrite loading changed the content of Q-10, which served as a hydrogen carrier in the electron transport chain of Nitrobacter, which varied the maximum cell-specific nitrite oxidation rate. That is, the
TSUJI, Koji +4 more
openaire +2 more sources