Potassium nitrate

About: Potassium nitrate is a research topic. Over the lifetime, 3537 publications have been published within this topic receiving 29450 citations. The topic is also known as: Nitric acid, potassium salt & Saltpeter.

Formation and Stability of Nitric Oxide Myoglobin. II. Studies on Meat

Abstract: SUMMARY— Results in model Mb solutions were confirmed by tests on pork samples treated with the mentioned additives and heated. The content of nitric oxide chromogen (DNOMb) in the samples was determined according to Hornsey. It was found that optimum DNOMb formation required not less than 5 mols nitrite per mol Mb; this may be due partly to side reactions with cysteine and other components of meat. In the presence of sufficient sodium ascorbate (200 mols per mot Mb), 3 mols nitrite per mol Mb was optimum. A large excess of nitrite (500 mols per mol Mb) induced the formation of green pigments, and appreciably less DNOMb was found. Reheating meat containing denatured Mb with nitrite converted Mb to a red pigment, but the color intensity so obtained was 40–60% of that obtained with normal nitrite treatment before heating. Potassium nitrate did not influence the DNOMb formation. The higher the temperature to which meat is heated, the lower its DNOMb content. Exclusion of oxygen by means of carbon dioxide during the treatment of meat improved the final DNOMb content. Irradiation by light of meat containing DNOMb showed that the concentration of nitrite necessary for optimal DNOMb formation in the absence of ascorbate (5 mols nitrite to 1 mol Mb) also caused optimum stability to irradiation in air. Potassium nitrate did not affect this stability. The breakdown of DNOMb increased with the light intensity. In a carbon dioxide atmosphere the breakdown of DNOMb is much slower than in air and it is independent of the light intensity.

Potassium, nitrogen, ammonium/nitrate ratio, and sodium chloride effects on wheat growth. II : Tillering and grain yield

Abstract: The objectives of this project were to study the interactions among N, K + and NaCl and the NH 4 + /NO 3 − ratio and their effect on vegetative and reproductive growth of wheat (Triticum aestivum L.). Plants were grown in polyethylene pots with fine calcareous dune sand with and without 60 mM NaCl, two nitrogen concentrations (2 or 6 mM), two K + concentrations (0.5 or 5 mM) and four NH 4 + /NO 3 − ratios (0:1, 1:1, 3:1 and 1:0). Three replicates were harvested at the beginning of flowering, and one grown to grain maturity. Shoot and root growth, and mineral composition of the leaves, were reported in part I of this series (1) (...)

Effect of Carbon and Nitrogen Sources on the Growth, Reproduction and Ligninolytic Enzymes Activity of Dictyoarthrinium Synnematicum Somrith

Abstract: The effect of different basal media, temperature, pH, days of incubation, carbon and nitrogen sources was studied on growth, reproduction and ligninolytic enzymes production of Dictyoarthrinium synnematicum Somrith. The fungus reproduced by chlamydospores and produced maximum growth in Glucose-peptone medium. It produced chlamydospores only at 24℃ and pH range of 5-9. The optimum mycelial growth rate was observed at 24℃ and pH 5 after 16 days of incubation. It showed gradual increase in the production of Lignin peroxidase up to 30 days, Manganese peroxidase up to 18 days of incubation after which it decreased and Laccase up to 22 days. The optimum growth and laccase activity were attained in lactose supplemented medium whereas the highest Lignin peroxidase and Manganese peroxidase activity was observed with glucose. It produced chlamydospores with fructose, glucose, maltose, sucrose and xylose. Sodium nitrate is the best inorganic nitrogen source for growth. Resting spores were formed in inorganic and organic nitrogen sources used in basal medium. Ammonium phosphate and potassium nitrate supported highest activity of Lignin peroxidase whereas best Manganese peroxidase activity was exhibited with ammonium oxalate and laccase with sodium nitrate. The fungus did not express ligninolytic enzymes activity with any organic nitrogen source.

Fusion tray of thermal transmission and storage medium, and preparation method

Abstract: This invention discloses a method for preparing molten salt heat-transfer and heat-storage medium, which comprises potassium nitrate, sodium nitrate, sodium nitrite and additives. The additives are cesium nitrate and potassium chloride at a weight ratio of (0.1-0.8):1. The molten salt heat-transfer and heat-storage medium has such advantages as good heat transfer property, wide working temperature range, high heat stability, high upper limit of safe usage temperature, low melting point, high phase-change latent heat, low requirement for system size and energy, and high energy utility.