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117 results for “nitrite”
Nitrites, Skeletal Muscle Mitochondrial Bioenergetics, and Physical Activity in Old Age
ClinicalTrials.gov study NCT04405180. IPD Sharing: YES. Countries: 1. Publications: 0.
Sodium Nitrite in Acute Myocardial Infarction
ClinicalTrials.gov study NCT00924118. IPD Sharing: NO. Countries: 1. Publications: 3.
Acute Effects of Inorganic Nitrite on Cardiovascular Hemodynamics in Heart Failure With Preserved Ejection Fraction
ClinicalTrials.gov study NCT01932606. IPD Sharing: Not stated. Countries: 1. Publications: 2.
Distribution and activity of nitrate and nitrite reductases in the microbiota of the human intestinal tract
Open the record for dataset details and reuse information.
Occurrence data of nitrate and nitrite in feed
<p><strong>Annex_III_occurrence data.xlsx</strong></p> <p>This Annex is an excel file presenting tables on occurrence data on nitrate and nitrite in feed.</p> <p> </p> <p><strong>Nitrate Nitrite_OCC_ZENODO.CSV</strong></p> <p>Contains the raw (no data cleaning applied to it) occurrence dataset on nitrate and nitrite as extracted from EFSA DWH on 03 December 2019 in feed samples presented in the opinion as described in its section 3.2.2. The data is provided <em>in csv format</em>. This dataset is compliant with EFSA SSD model and contains two additional columns documenting issues identified in the cleaning process (column: issue) and the action taken (column: action) to address the issue (e.g. delete record or update values in specific fields).</p> <p>The link to the catalogues of controlled terminologies can be found under "Related identifiers”.</p>
Nitrogen isotope fractionation during archaeal ammonia oxidation: coupled estimates from measurements of residual ammonium and accumulated nitrite
<p>The naturally occurring nitrogen (N) isotopes, <sup>15</sup>N and <sup>14</sup>N, exhibit different reaction rates during many microbial N transformation processes, which results in N isotope fractionation. Such isotope effects are critical parameters for interpreting natural stable isotope abundances as proxies for biological process rates in the environment across scales. The kinetic isotope effect of ammonia oxidation (AO) to nitrite (NO<sub>2</sub><sup>-</sup>), performed by ammonia-oxidizing archaea (AOA) and bacteria (AOB), is generally ascribed to the enzyme ammonia monooxygenase (AMO), which catalyzes the first step in this process. However, the kinetic isotope effect of AMO, or ε<sub><i>AMO</i></sub><span><span> </span></span>, has been typically determined based on isotope kinetics during product formation (cumulative product, NO<sub>2</sub><sup>-</sup>) alone, which may have overestimated ε<sub><i>AMO</i></sub><span><span> </span></span> due to possible accumulation of chemical intermediates and alternative sinks of ammonia/ammonium (NH<sub>3</sub>/NH<sub>4</sub><sup>+</sup>). Here, we analyzed <sup>15</sup>N isotope fractionation during archaeal ammonia oxidation based on both isotopic changes in residual substrate (RS, <span>NH<sub>4</sub><sup>+</sup></span>) and cumulative product (CP, NO<sub>2</sub><sup>-</sup>) pools in pure cultures of the soil strain <i>Nitrososphaera viennensis</i> EN76, and in highly enriched cultures of the marine strain <i>Nitrosopumilus adriaticus</i> NF5, under non-limiting substrate conditions. We obtained ε<sub><i>AMO</i></sub><span><span> </span></span> values of 31.9-33.1‰ for both strains based on RS (<span>δ<sup>15</sup>NH<sub>4</sub><sup>+</sup>), and show that </span>estimates based on CP (δ<sup>15</sup>NO<sub>2</sub><sup>-</sup>) give larger isotope fractionation factors by 6-8‰. Complementary analyses showed that, at the end of the growth period, microbial biomass was <sup>15</sup>N-enriched<span> (10.1</span>‰),<span> whereas </span>nitrous oxide (N<sub>2</sub>O) was highly <sup>15</sup>N depleted (-38.1‰) relative to the initial substrate. Although we did not determine the isotope effect of <span>NH<sub>4</sub><sup>+</sup> </span>assimilation (biomass formation) and N<sub>2</sub>O production by AOA, our results nevertheless show that the discrepancy between ε<sub><i>AMO</i></sub><span><span> </span></span> estimates based on RS and CP might have derived from incorporation of <sup>15</sup>N-enriched residual NH<sub>4</sub><sup>+</sup> after AMO reaction into microbial biomass, and that N<sub>2</sub>O production did not affect isotope fractionation estimates significantly.</p>
Data from: Detection for nitrite based on fluorescent carbon dots by hydrothermal method with folic acid
A fluorescent carbon dots probe for detection of aqueous nitrite was fabricated by a one-pot hydrothermal method and the transmission electron microscope, X-ray diffractometer, UV-Vis absorption spectrometer and fluorescence spectrophotometer were used to study the property of carbon dots. The fluorescent property of carbon dots influenced by concentration of aqueous nitrite was studied. The interaction between the electron-donating functional groups and the electron-accepting nitrous acid could account for the quenching effect on carbon dots by adding aqueous nitrite. The products of the hydrolization of aqueous nitrite performed stronger quenching effect at lower pH. The relationship between the relative fluorescence intensity of carbon dots and the concentration of nitrite was described by the Stern-Volmer equation (I0/I-1=0.046[Q]) with a fine linearity (R2=0.99). The carbon dots-based probe provides a convenient method for the detection of nitrite concentration.
Performance of Fe-N/C oxygen reduction electrocatalysts towards NO2-, NO, and NH2OH electroreduction – from fundamental insights into the active centre to a new method for environmental nitrite destruction
<p>This Excel data file contains the data used to produce the figures in the paper:</p> <p>Malko, D., Kucernak, A and Lopes, T, " Performance of Fe-N/C oxygen reduction electrocatalysts towards NO2-, NO, and NH2OH electroreduction – from fundamental insights into the active centre to a new method for environmental nitrite destruction"</p> <p>Journal of the American Chemical Society, 2016, DOI:10.1021/jacs.6b09622</p> <p>Please cite the above reference if you wish to use this data</p>
Controls on nitrite oxidation in the upper Southern Ocean: insights from winter kinetics experiments in the Indian sector
<p>This is a dataset to the paper "Controls on nitrite oxidation in the upper Southern Ocean: insights from winter kinetics experiments in the Indian sector" published under the Biogeosciences journal. This dataset contains rates of nitrite oxidation, kinetic parameters (half-saturation constant and maximum oxidation rate) for nitrite oxidation, latitudinal gradient of surface nitrite concentrations, integrated rates of ammonium and nitrite oxidation. </p>
Safety and Effectiveness of Intra-coronary Nitrite in Acute Myocardial Infarction
ClinicalTrials.gov study NCT01584453. IPD Sharing: Not stated. Countries: 1. Publications: 3.
Nitrite Effects on Cardiac Muscle in CABG
ClinicalTrials.gov study NCT04001283. IPD Sharing: NO. Countries: 1. Publications: 1.
Nitrite Supplementation in Long COVID Patients
ClinicalTrials.gov study NCT05618574. IPD Sharing: NO. Countries: 1. Publications: 20.
Effects of Nitrite on Blood Vessel Dilation in Normal Volunteers
ClinicalTrials.gov study NCT00048477. IPD Sharing: Not stated. Countries: 1. Publications: 3.
Effect of Nitrite on Exercise Physiology and Metabolism
ClinicalTrials.gov study NCT00105222. IPD Sharing: Not stated. Countries: 1. Publications: 3.
Nitrite Infusion in Healthy Volunteers
ClinicalTrials.gov study NCT00103025. IPD Sharing: Not stated. Countries: 1. Publications: 4.
Nitrite-boosting Therapy for Improving Physiological Function in Patients With Chronic Kidney Disease
ClinicalTrials.gov study NCT03826147. IPD Sharing: NO. Countries: 1. Publications: 2.
Therapeutic Application of Intravascular Nitrite for Sickle Cell Disease
ClinicalTrials.gov study NCT00095472. IPD Sharing: Not stated. Countries: 1. Publications: 3.
Probiotic Effect on Dietary Nitrate to Plasma Nitrite Production ( OPEDNPN )
ClinicalTrials.gov study NCT06375694. IPD Sharing: YES. Countries: 1. Publications: 30.
The Effect of Sodium Nitrite on Renal Function and Blood Pressure in Hypertensive Versus Healthy Subjects
ClinicalTrials.gov study NCT02527837. IPD Sharing: Not stated. Countries: 1. Publications: 1.
Dietary Nitrate and Nitrite to Increase Nitric Oxide in Patients With Coronary Artery Disease
ClinicalTrials.gov study NCT00069654. IPD Sharing: Not stated. Countries: 1. Publications: 3.
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