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117 results for “nitrite”
Inorganic Nitrite Delivery to Improve Exercise Capacity in HFpEF
ClinicalTrials.gov study NCT02742129. IPD Sharing: YES. Countries: 1. Publications: 3.
Sediment oxygen, di-nitrogen (gas), nitrate, nitrite, ammonium, phosphate, and silicate flux from sealed, whole sediment core incubations from a fertilized (Sweeney) and reference (West) creek in the Plum Island Estuary, Massachusetts.
Salt marsh ecosystems serve as critical nutrient filters by removing reactive nitrogen (N) through denitrification. We examined the influence of long-term fertilization on N transformation and removal in a salt marsh tidal creek ecosystem fringing the Plum Island Sound estuary in northern Massachusetts, USA. Sediment oxygen demand was within the range of other marsh systems (1271.9 to 7855.0 µmol m-2 h-1) and was not significantly different between the fertilized and reference creek. Net N2 fluxes ranged from net N fixation of -402.7 µmol N2-N m-2 h-1 in the reference creek to net denitrification of 524.9 µmol N2-N m-2 h-1 in the fertilized creek. Net N2 flux and nitrate uptake were significantly higher in the fertilized creek, and in both creeks, net denitrification appeared to be nitrate limited. We calculated rates of dissimilatory nitrate reduction to ammonium (DNRA) and found it to be significantly higher in the fertilized creek, representing 45 and 11% of the total nitrate uptake in the fertilized and reference creeks, respectively. Additionally, there was a strong relationship between ammonium and nitrite fluxes in both creeks. These results suggest that DNRA may outcompete denitrification at high nitrate concentrations. Increased anthropogenic nutrient loading may therefore have a detrimental effect on the N removal capacity of salt marsh ecosystems. (From: Vieillard and Fulweiler (2012) Marine Ecology Progress Series 147: 11-22. DOI:10.3354/meps10013).
Water column nitrate and ammonium concentrations, sediment oxygen, di-nitrogen (gas), nitrate, nitrite, ammonium, phosphate, and silicate flux from sealed, whole core incubations, Rowley River, Rowley, MA.
Tidal flats are critical components of coastal estuarine ecosystems characterized by high rates of benthic primary productivity and biogeochemical cycling. In order to investigate the impact of anthropogenic nutrient loading on tidal flat biogeochemistry we carried out a two-week fertilization experiment. Throughout the course of the study we conducted two light-dark, whole-core incubations and took measurements of three indicators of microphytobenthos activity in addition to quantifying the resident eastern mud snail (Ilyanassa obsoleta) population.
Table 2 in Description of Epistylis camprubii n. sp., a Species Highly Tolerant to Ammonium and Nitrite
<p><b>Table 2.</b> Minimum (Min) and maximum values (Max) of the main physicochemical parameters in which <i>Epistylis camprubii</i> was observed, and comparison with available ecological data of other <i>Epistylis</i> species.</p><table><tbody><tr><th></th><th><i>Epistylis camprubii</i></th><th><i>E. chrysemydis</i></th><th><i>E. coronata</i></th><th><i>E. hentscheli</i></th><th><i>E. plicatilis</i></th><th><i>E. rotans / E. procumbens</i></th></tr></tbody><tbody><tr><th></th><td>Min–Max</td><td>Min–Max</td><td>Min–Max</td><td>Min–Max</td><td>Min–Max</td><td>Min–Max</td></tr><tr><th>Soluble Chemical Oxygen Demand (mg·L–1)</th><td>53.8–415.3</td><td>–</td><td>–</td><td>–</td><td>–</td><td>–</td></tr><tr><th>Ammonium (N-NH +, mg·L–1) 4</th><td>0.54–491</td><td>2.1 <b>–</b> 5.9</td><td>0 <b>–</b> 1.6</td><td>0 <b>–</b> 1.9</td><td>0 <b>–</b> 27</td><td>0 <b>–</b> 0.018</td></tr><tr><th>Free ammonia (N-NH, mg·L–1) 3</th><td>0.024–18.01</td><td>–</td><td>–</td><td>–</td><td>–</td><td>–</td></tr><tr><th>Nitrites (N-NO –, mg·L–1) 2</th><td>0–572.1</td><td>0.1 <b>–</b> 0.8</td><td>–</td><td>–</td><td>0 <b>–</b> 61</td><td>–</td></tr><tr><th>Free nitrous acid (N-HNO, mg·L–1) 2</th><td>0.00013–0.47</td><td>–</td><td>–</td><td>–</td><td>–</td><td>–</td></tr><tr><th>Nitrates (N-NO –, mg·L–1) 3</th><td>0–321</td><td>1.5 <b>–</b> 4.2</td><td>–</td><td>–</td><td>0.14 <b>–</b> 52</td><td>–</td></tr><tr><th>Temperature (°C)</th><td>22.6–33.6</td><td>10 <b>–</b> 35</td><td>2 <b>–</b> 12</td><td>2 <b>–</b> 32</td><td>6.6 <b>–</b> 32</td><td>6 <b>–</b> 23</td></tr><tr><th>pH</th><td>6.3–8.66</td><td>7.0 <b>–</b> 8.6</td><td>7.2 <b>–</b> 7.6</td><td>7.0 <b>–</b> 8.6</td><td>4.7 <b>–</b> 8.5</td><td>7.2 <b>–</b> 7.8</td></tr></tbody></table>
Table 1 in Description of Epistylis camprubii n. sp., a Species Highly Tolerant to Ammonium and Nitrite
<p><b>Table 1.</b> Mean, standard deviation (SD), maximum values (Max), minimum values (Min), coefficient of variation (CV) and number of measurements realized (N) of morphological characteristics of <i>Epistylis camprubii</i>.</p><table><tbody><tr><th></th><th>Mean</th><th>SD</th><th>Max</th><th>Min</th><th>CV</th><th>N</th></tr></tbody><tbody><tr><th>Zooid length, <i>in vivo</i> (µm)</th><td>58.7</td><td>10.1</td><td>98.1</td><td>35.3</td><td>17.2</td><td>343</td></tr><tr><th>Zooid width, <i>in vivo</i> (µm)</th><td>32.0</td><td>5.4</td><td>65.2</td><td>18.0</td><td>16.8</td><td>342</td></tr><tr><th>Peristomial disc diameter, <i>in vivo</i> (µm)</th><td>15.5</td><td>1.9</td><td>21.3</td><td>11.2</td><td>12.1</td><td>94</td></tr><tr><th>Peristomial lip height, <i>in vivo</i> (µm)</th><td>7.8</td><td>1.2</td><td>10.6</td><td>5.0</td><td>15.9</td><td>149</td></tr><tr><th>Peristomial lip width, <i>in vivo</i> (µm)</th><td>24.2</td><td>2.9</td><td>31.7</td><td>16.2</td><td>11.8</td><td>110</td></tr><tr><th>Stalk width, <i>in vivo</i> (µm)</th><td>5.3</td><td>0.9</td><td>8.4</td><td>3.1</td><td>16.9</td><td>152</td></tr><tr><th>Number of silverlines from peristome to aboral trochal band</th><td>120.8</td><td>10.1</td><td>136.0</td><td>106.0</td><td>8.4</td><td>11</td></tr><tr><th>Number of silverlines from aboral trochal band to scopula</th><td>40.7</td><td>5.1</td><td>48.0</td><td>33.0</td><td>12.5</td><td>11</td></tr><tr><th>Macronucleous characteristics</th><td>C-shaped, transversely oriented, in the adoral half of the cell</td><td></td><td></td></tr><tr><th>Number of contractile vacuoles, position</th><td>One, in the adoral third of the body, on dorsal wall of vestibulum</td><td></td></tr></tbody></table>
Scripts, figures and output for "Oxygen intrusions sustain aerobic nitrite oxidation in anoxic marine zones" by Pearse J. Buchanan & colleagues.
<p>Scripts for producing the visualisations, analysis and model results presented in the paper entitled "<em>Oxygen intrusions sustain </em><em>aerobic nitrite-oxidizing bacteria in anoxic </em><em>marine zones</em>" by Pearse James Buchanan & colleagues. </p> <p>Figures.tar holds the figures made with the python scripts <br>Chemostat_model.tar holds the python code required for running the chemostat model<br>Chemostat_output.tar holds the output of our experiments<br>OxicMAGS.txt and mumax_MAGS_gRodon.txt are required data files for fig5.py</p> <p>Other python scripts and figures seen in the full paper are held at https://doi.org/10.5281/zenodo.15139207 and were completed using jupyter notebooks on a memory intensive instance on the Expanse Super computer in San Diego. Please see those files for the remaining analysis.</p> <p><br>Contact pearse.buchanan@csiro.au or ezakem@carnegiescience.edu for any questions<br> </p> <p> </p>
Oral Nitrite and Nitrate in Healthy Normal Volunteer Adults
ClinicalTrials.gov study NCT01681836. IPD Sharing: Not stated. Countries: 1. Publications: 1.
Inorganic Nitrite to Amplify the Benefits and Tolerability of Exercise Training in Heart Failure With Preserved Ejection Fraction (HFpEF) (INABLE-Training)
ClinicalTrials.gov study NCT02713126. IPD Sharing: NO. Countries: 1. Publications: 2.
Safety and Efficacy of Sodium Nitrite in Sickle Cell Disease
ClinicalTrials.gov study NCT01033227. IPD Sharing: NO. Countries: 1. Publications: 15.
Nitrites, Exercise, and Peripheral Arterial Disease
ClinicalTrials.gov study NCT01684930. IPD Sharing: Not stated. Countries: 1. Publications: 2.
Oral Nitrite in Adults With Metabolic Syndrome and Hypertension
ClinicalTrials.gov study NCT01681810. IPD Sharing: Not stated. Countries: 1. Publications: 1.
Topical Sodium Nitrite in Sickle Cell Disease and Leg Ulcers
ClinicalTrials.gov study NCT02863068. IPD Sharing: NO. Countries: 1. Publications: 1.
Inhaled Sodium Nitrite as an Antimicrobial for Cystic Fibrosis
ClinicalTrials.gov study NCT02694393. IPD Sharing: NO. Countries: 1. Publications: 2.
Nitrite, Isoquercetin and Endothelial Dysfunction (NICE) Trial
ClinicalTrials.gov study NCT02552888. IPD Sharing: YES. Countries: 1. Publications: 2.
Phase IIa: Safety, PK, & Tolerability of Sodium Nitrite in Patients With Peripheral Arterial Disease-SONIC
ClinicalTrials.gov study NCT01401517. IPD Sharing: Not stated. Countries: 1. Publications: 1.
Sodium Nitrite in Lung Transplant Patients to Minimize the Risk of Pulmonary Graft Dysfunction
ClinicalTrials.gov study NCT01715883. IPD Sharing: Not stated. Countries: 1. Publications: 10.
Safety and Pharmacokinetic Evaluation of Nitrite for Prevention of Cerebral Vasospasm
ClinicalTrials.gov study NCT00873015. IPD Sharing: Not stated. Countries: 1. Publications: 1.
Inhaled Nitrite in Subjects With Pulmonary Hypertension
ClinicalTrials.gov study NCT01431313. IPD Sharing: UNDECIDED. Countries: 1. Publications: 14.
Inhaled Sodium Nitrite on Heart Failure With Preserved Ejection Fraction
ClinicalTrials.gov study NCT02262078. IPD Sharing: NO. Countries: 1. Publications: 2.
Clinical Trial of Sodium Nitrite for Out of Hospital Cardiac Arrest
ClinicalTrials.gov study NCT03452917. IPD Sharing: UNDECIDED. Countries: 1. Publications: 1.
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