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Showing 1 to 19 of 19 for “"Nitrite/nitrate"”.
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Effluent characterization of flow-through aquaculture operations in West Virginia
… total suspended solids, total ammonia nitrogen, nitrite, nitrate, and total phosphorus. Using flow rate and pollutant concentrations, mass loadings were then calculated for each constituent.;Average concentrations and mass loadings of regulated parameters were within acceptable ranges as well as …
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The Effects of Nutrient Concentrations on Macroinvertebrate Distributions in Georgia
… were measured in mg/L and ranged as follows: nitrite and nitrite/nitrate < 0.01 to >1.0, ammonia < 0.03 to 3.0, and phosphorous < 0.01 to 1.2. Analysis determined (1) the RBP has the potential to indicate nutrient loading; (2) nutrient parameters that were significantly different varied across …
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Variations of Vibrio Populations in Pacific White Shrimp, <i>Litopenaeus vannamei</i>, Aquaculture Raceways
… tank parameters such as temperature, ammonia, nitrite, nitrate and phosphate. The total bacteria gene copy abundances were higher (<em>p</em> = 0.0081) in the low solids tanks but the quantity of <em>Vibrio</em> genus and <em>Vibrio parahaemolyticus</em> DNA copy numbers did not significantly …
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Sedimentary Dynamics and Water Quality in Floodplains of the Lower Mississippi River near Natchez, Mississippi, during the 2018 and 2019 Floods
… was analyzed for dissolved phosphorus and nitrite-nitrate.</p> <p>Overbank sediment properties in different hydrologic and geomorphological settings vary with proximity to the main channel. Floodplain surface and suspended sediments decrease in grain size (D50) as distance increases from …
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Citrulline metabolism in cultured fibroblasts : citrullinemia analysis and nitric oxide production
… need to be employed (longer cytokine activation, nitrite/nitrate detection).
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Nitrate- and Nitrite-Reductase Activities in Mycobacterium Avium A5
… medium (Nitrogen Test Medium) with glutamine, nitrite, nitrate, or ammonia as sole nitrogen source at a concentration of 2 mM at 370C aerobically. The strain grew well on all the nitrogen sources except nitrite. It grew slowly on nitrite with a generation time of 6 days and cultures were not …
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Straight pipes and household wastewater discharges into the rural Alabama and impact on watershed water quality with wetland land-uses
… potassium, sodium, ammonium, ortho-phosphorus, nitrite, nitrate, dissolved organic carbon, optical indices), and microbiological (E. coli) water quality parameters. Excitation-emission matrixes (EEMs) Parallel Factor Analysis (PARAFAC) was used to identify and classify fluorescence emitting …
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Stream microbial communities along an agricultural gradient
… which is transformed through nitrification into nitrate by prokaryotes that produce the ammonia monooxygenase enzyme (AMO). The Latah Creek watershed in WA State (USA) drains approximately 1178 km², of which half is agricultural. Because the tributary streams reside in forested, agricultural and …
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The relationship between markers of disease severity in obstructive sleep apnea patients and hemodynamic and respiratory function during graded exercise testing
… marker of vascular function, 24-hour urinary nitrite/ nitrate elimination was also determined for each patient. (3): The last aim was included in order to provide qualitative information concerning treatment, subjective sleep and daytime function, and physical activity levels of the OSA …
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The effects of atrazine on nitrogen cycling in a freshwater wetland microcosm
… a perturbation reference to the microcosm. Nitrite, nitrate, and ammonia levels were determined, as was dissolved oxygen, pH, and conductivity. The nitrifying bacteria and denitrifying bacteria were enumerated. Data were analyzed with one way analysis of variance (ANOVA) with block and …
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Nitrate and nitrite growth inhibition of Desulfovibrio strains
… bacteria can be inhibited by the chemicals nitrate and nitrite. Nitrate and nitrite are also present in heavy-metal contaminated environments and limit the growth of sulfate-reducing bacteria and their positive effects. In addition, nitrate and nitrite are often added to oil production …
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Algal sludge disposal in waste-water reclamation
… No significant amount of ammonia nitrogen or nitrite-nitrate nitrogen was present in the sludge. The composition and characteristics of dry algal sludge indicate applicability as an aid to soil conditioning. For three months the characteristics of a lagoon used for algal sludge disposal were …
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Factors Influencing the Nitrification Efficiency of Fluidized Bed Filters With a Plastic Bead Medium
… inflow concentration, ammonia loading rates, nitrite, nitrate, temperature, pH, dissolved oxygen levels, hardness, alkalinity and flow rates were monitored. Initially, four different flow rates, ranging from 6 Lpm–12 Lpm, were tested at constant ammonia feed level (8.4 g/day). Here, biofilter …
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Nitrification Investigation And Modeling In The Chloraminated Drinking Water Distribution System
… of five major parts. (1) System variations of nitrates, nitrites, DO, pH, alkalinity, temperature, chloramine residuals and hydraulic residence times (HRT) during biological nitrification are interrelated and discussed relative to nitrification, which demonstrated Stoichiometric relationships …
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Uji kemampuan Scenedesmus sp dalam mendegradasi polutan limbah cair tapioka
… fat, and dangerous inorganic compound like CN, nitrite, nitrate, ammonia, BOD, COD, pH and others. In the attempt of minimizing impact of contamination resulted, one of the methods recently developed is bioremediation. A microalga is water plant microorganism having potentials that can be …
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Evaluation of storage strategies and techniques for the hydrochemical analysis of nutrients in Atlantic Ocean coastal water samples
… concentrations of silicate, inorganic phosphate, nitrite, nitrate and urea from the initial concentrations determined on collection of the seawater samples were monitored at intervals over a twelve week storage period. Chemical analysis of filtered and non-filtered water samples on the day of …
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Nitric oxide in airway inflammation
… with nitric oxide (NO) and the metabolites nitrite/nitrates (NOx) in diseases such as chronic obstructive pulmonary disease (COPD), but some of the variables affecting the results are unknown. It was hypothesised that 1) EBC would be influenced by lung volumes and the type of EBC collection …
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Nitrite and insulin lower the oxygen cost of ATP synthesis in skeletal muscle cells by pleiotropic stimulation of glycolysis
Dietary nitrate lowers the oxygen cost of submaximal exercise, but precise mechanistic insight into how this occurs is lacking. Research suggests that dietary nitrate may render oxidative ATP synthesis more efficient, but evidence is inconclusive at present. This thesis aimed to establish how …
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Ultraviolet a irradiation on human skin : nitric oxide mediated cardiovascular responses
… we also noted a rise in circulatory nitrite (0.5±0.04 μM before irradiation to 0.72±0.04 μM) and a drop in circulatory nitrate (11.79±0.64 μM before irradiation and 8.99±0.4 μM). For us to further clarify the role of nitric oxide in different latitude, a monochromator machine that …