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.

Effect of hydrogen cyanamide (dormex), volk oil and potassium nitrate on budbreak, yield and nut characteristics of pistachio (Pistacia vera L.)

Abstract: SummaryInadequate chilling may delay normal blooming and severely reduce yield of pistachio trees in sub-tropical regions. The present study was conducted in a commerical orchard in Shahmiran, in the south west of the Kerman province of Iran. Hydrogen cyanamide (“dormex” at 0, 1.5 and 3%), volk oil (0, 3.5 and 7%) and potassium nitrate (0, 1.5 and 3%) were applied to branch units of pistachio trees in 2002 and 2003. These treatments, plus combinations of dormex and volk oil, volk oil and potassium nitrate, and 7% volk oil were applied 4 and 8 weeks before normal budbreak (January 5 and February 4). The chemicals were sprayed on two branches of ‘Ahmad-aghaei’ trees during the two years of study. Treatments with hydrogen cyanamide (dormex), volk mineral oil and combinations of dormex and volk oil, volk oil and potassium nitrate brought forward budbreak by 15 to 20 days compared with controls, and significantly increased yield of the treated branches, dehiscence of nuts and reduced the blank percentage of pi...

Method of strengthening chemically a glass container

Abstract: In a method of strengthening chemically a glass container comprising applying an aqueous solution of potassium salts to a soda-containing glass container to form a potassium salt adhered layer, holding at an ion exchange treatment temperature for a period of time sufficient, then cooling to room temperature and removing the residual potassium salts, the feature consists in using, as the aqueous solution of potassium salts, a concentrated aqueous solution containing a small amount of surfactant and a high concentration of mixed potassium salts consisting of potassium nitrate having a relatively low melting point and at least one potassium salt having a relatively high melting point selected from the group consisting of potassium chloride and potassium sulfate in such a proportion that 10 to 80% by weight of the potassium salts be present in solid phase, when heated at the ion exchange treatment temperature, to prevent the fused potassium salts from flowing off from the surfaces of the glass container, applying the concentrated aqueous solution to the outer surface and inner surface of the glass container at a temperature of lower than that of the concentrated aqueous solution, causing the potassium salts to deposit on the outer surface and inner surface of the glass container by virtue of the temperature difference, then drying and holding the glass container having the mixed potassium salt adhered layer at an elevated temperature below the strain point of the glass but as near the strain point as possible for a period of time sufficient to form a compressive stress layer on the outer surface and inner surface of the glass container.

Ions of Europium Distributed Between Different Configurations in Homogeneous Solutions

Abstract: Changes in the environment of europium ions in solution bring about changes in the structure of the absorption spectrum. For example, an aqueous solution of europium chloride upon having potassium nitrate added to it gives rise to the structures in the spectra of europium nitrate, in addition to the spectrum of europium chloride. Structures in the spectra of europium salts in alcohol differ from those in water. In a mixed solvent of water and alcohol both spectra are present with relative intensities which vary according to the relative amounts of the components. Europium chloride in the mixed solvent has a spectrum which cannot be distinguished from the exact superposition of the spectra of europium chloride in pure water and in pure alcohol. However, the spectrum of europium nitrate in the mixed solvent has its lines shifted from the positions they occupy in the spectra of the nitrate in the pure solvents. The shifts seem to vary continuously with the proportions of water to alcohol. Nevertheless, the l...