Showing papers on "Potassium nitrate published in 2002"

The effects of potassium nitrate and NO-donors on phytochrome A- and phytochrome B-specific induced germination of Arabidopsis thaliana seeds

Abstract: Nitrogenous compounds, such as potassium nitrate, potentiate germination of different species of light-requiring seeds. Using light-induced Arabidopsis thaliana seed germination as a model system, our data suggested that only phytochrome A (phyA)-specific induced germination was affected after the exogenous application of nitrates, different nitric oxide (NO)-donors (such as organic nitrates) or sodium nitroprusside. The stimulative effect was very pronounced. Treated seed samples reached maximal germination after very short periods of red-light irradiation. To a far lesser extent, these substances affected phytochrome B (phyB)-specific induced germination. In phyB-specific induced germination, potassium nitrate was most effective, but germination percentages never exceeded 50%. The least effective was sodium nitroprusside, which practically did not affect phyB-specific induced germination. These results were confirmed using corresponding phytochrome mutants.

Effect of inorganic N on the population, in vitro colonization and morphology of Acetobacter diazotrophicus (syn. Gluconacetobacter diazotrophicus)

Abstract: We investigated whether Acetobacter diazotrophicus (syn.Gluconacetobacter diazotrophicus) could be recovered only from sugarcane plants either with low or no application of fertiliser N. We report here the enrichment and enumeration of A. diazotrophicus from high N-fertilised samples where high heterotrophic populations reduce the numbers of A. diazotrophicus ultimately diminshing its isolation frequency as reported earlier. The growth medium of micropropagated sugarcane seedlings of the varieties Co 8021, Co 86249, Co 86010, Co 86032, and Co 87025 was amended with potassium nitrate, ammonium nitrate, ammonium chloride and urea. The colonisation and AR activity of A. diazotrophicus were affected in the presence of high levels (25 mM) of ammonium chloride and ammonium nitrate but remained unaffected in low levels of N (i.e 1/10th of MS liquid medium) and with high levels of potassium nitrate (25 mM) and urea (500 ppm). A. diazotrophicus was detected in the inoculated plants both at low and high levels of N based on the amplification of a specific 16S rRNA gene fragment using PCR based method targeting a stretch of 445 bp with primers AC and DI. High levels of N in the growth medium induced morphological changes on A. diazotrophicus cells resulting in long pleomorphic cells. The percentage of pleomorphic cells was in the decending order from NH4NO3, NH4Cl, KNO3, and urea. These changes were more prominent in ammonium chloride and ammonium nitrate than potassium nitrate, urea and N free medium. The morphological changes and the increased heterotrophic populations may play a role on the survival ofA. diazotrophicus in high N-fertilised samples/environments.

Process for preparing chemically strengthened glass

Abstract: A chemically toughened glass is prepared through preparing fused salt from fused salt of potassium nitrate, potassium hydroxide, Al2O3 and diatomite, heating it to 400-500 deg.C, heating cleaned glass to 350 deg.C for 30 min, immersing the glass in the said fused salt at 400 deg.C for 3-8 hr, slowly taking out entering an annealing oven its temp. very close to that of fused salt, and then annealing to room temp. Its advantages are high productivity, high surface stress, thin thickness (less than 3mm), and high smoothness.

Fire-extinguishing aerosol without toxicity and corrosion for electric appliance

Abstract: A fire-extinguishing aerosol not generating harmful substance for electric equipment (computer, communication equipment, electric generator, etc) is prepared from oxidant (strontium nitrate or strontium nitrate/potassium nitrate), reducer (guanidine nitrate or dicyandiamide) and modifier (potassium ferrocyanide, aluminium powder, carbon powder and phenolic resin). After it is ignited by sensor, alot of fire-extinguishing particles are generated to cover on the object to be protected while the inert gas is generated for extinguishing fire.

Composite liquid fertilizer for injection of fruit stem and its production process

Abstract: The liquid fertilizer contains several nutritious elements and is compounded with urea, potassium nitrate, ferrous sulfate, zinc sulfate, magnesium sulfate, manganese sulfate, boric acid, potassium dihydrogen phosphate, calcium nitrate, copper sulfate, citric acid and water. It has less pollution of soil and underground water, can regulate the balance between the nutritious elements inside tree body and may be produced in simple process, at low cost and high production efficiency.

Content of Oxalate in Actinidia Deliciosa Plants Grown in Nutrient Solutions with Different Nitrogen Forms

Abstract: Kiwifruit plants (Actinidia deliciosa cv. Hayward) were grown in Hoagland nutrient solution with calcium nitrate, potassium nitrate, ammonium nitrate or ammonium chloride as the nitrogen source. Plants grown in the solution with nitrate nitrogen displayed a higher oxalate content, greater shoot length and leaf area, and higher content of ascorbic acid and NO3− ions in the leaves. Plants grown in the solution with ammonium nitrate, and particularly with ammonium chloride, showed low oxalate content, low content of ascorbic acid and NO3−, high content of Cl− and Na+, low shoot length and leaf area. Oxalate formation appeared to be connected with the assimulation of nitrate, more precisely with nitrate reduction, while ammonium nitrogen assimilation did not induce the synthesis of oxalic acid.

Dissolution susceptibility of the oxide species formed on mild steel during its oxidation in molten NaNO 3 -KNO 3 eutectic mixture

Abstract: Mild steel was oxidized in pure molten NaNO3-KNO3 eutectic mixture at temperatures of 300, 375, and 450 °C and in the presence of 0.05 molal KH2PO4, K2Cr2O7, or Na2O2 as additives. The dissolution susceptibility of the formed oxide species was evaluated in H2SO4 acid solution using the potential-time and current-time measurements under the open-circuit conditions. It was found that the rate of dissolution depended on the composition of molten nitrate bath, used for oxidation of mild steel, and its temperature. This was attributed to the effect of the previous conditions of the nitrate bath on the nature and composition of the oxide species formed on the metallic surface. The more resistant to dissolution in H2SO4 solution were those electrodes that were oxidized in nitrate melt at 450 °C in the presence of K2Cr2O7 or Na2O2 as additives.

Effect of soil potassium level and different potassium fertilizer forms on nutritional status, growth and yield of apple trees in the first three years after planting

Abstract: Studies were carried out in 1999-2001 on typical grey brown podzolic soil created of boulder clays for growing apple trees of 'Golden Delicious' cultivar on M.26 rootstock. Two-year-old trees were planted at 3.5 x 1.2 m spacing (2381 trees ha - 1 ) in the spring of 1999. Herbicide fallow strips were in tree rows but grass was maintained between the rows. Investigation was to examine the effect of an increasing potassium level: 12, 16 and 20 mg K 100 g - 1 of soil and three potassium fertilizers: potassium chloride (KCl), potassium sulphate (K 2 SO 4 ) and potassium nitrate (KNO 3 ) on the growth, yield and nutrient content in the soil and in the leaves of apple trees. Different forms of potassium fertilizers permitted to define the effect of anions accompanying potassium, mainly sulphates (S-SO 4 ), upon the basic parameters of growth and yield of apple trees in the initial 3-year period of cultivation. The content of available forms of nutrients in the soil was analysed by the universal method, where in the macroelements and boron were determined in the modified Spurway extract, but other micro-elements in the modified Lindsay extract. It was found that in the 3-year-old apple orchard, there was a tendency towards both a higher apple yield and an increased number of one-year-old shoots with the use of the sulphatic form of potassium fertilizer (K 2 SO 4 ), although it has not been statistically proven. Such a fertilizer was accompanied by an increase of sulphates in the soil. There was also chloride accumulation when the chloride form of potassium fertilizer (KCI) was used. An increasing level of potassium in the soil raised the content of this nutrient in the leaves, although they did not enhance sulphur as a result of potassium sulphate application. However, a higher chloride content in the foliage was recorded as an effect of apple tree fertilization with potassium chloride.

Combustible oxidizing composition for thermochemical treatment of oil formation

Abstract: FIELD: oil producing industry. SUBSTANCE: combustible-oxidizing composition includes saltpeter and product of reaction of nitric acid and organic compound. Organic compound is used in the form of at least one compound of the following group: alkanolamine, alkylamine, alkylpolyamine with 2-6 carbon atoms. Reaction production has pH of medium equal to 5.0-8.0. Combustible-oxidizing composition has the following ratio of components, mas.%: saltpeter, 2.0-35.0; reaction production, the balance. Composition has saltpeter in the form of ammonium nitrate, potassium nitrate, sodium nitrate or calcium nitrate, preferably, ammonium nitrate, and also ethanolamine and/or ethylamine with 2-3 carbon atoms, 2, preferably. Alkylpolyamine has at least 2 amino groups, 3, preferably. Organic compound is used in the from of aqueous solution containing at least 80% of main substance. Composition may additionally have special-purpose additive selected from a group including potassium permanganate, isopropylmetacarboran, acetic acid in amount not more 3% of initial component weight. Said composition may be used for activation or restoration of oil well operation whose productivity is reduced due to paraffin-hydrate and asphalt-resinous accumulations clogging filtration channels and distributing communication of well with fluid-carrying formation. Technical result consists in higher fire and explosion safety in operation of said composition under any weather conditions, increased formation oil recovery, reduced degree of disturbance of casing and tubing strings, provision of controlled pressure in treatment of wells of any depth and complexity. EFFECT: higher efficiency. 10 cl, 1 tbl

Bactericidal agent "diksam"

Abstract: FIELD: veterinary. ^ SUBSTANCE: bactericidal agent contains, wt %: iodine 35-40, potassium nitrate 35-40, copper chloride 3-5, and carbohydrates - the balance. ^ EFFECT: enhanced efficiency of disinfection of veterinary surveillance objects by 20-40% and weakened fire risk of treatments. ^ 17 ex

Chemical strengthening process for disks used in disk drive data storage devices

Abstract: A salt mixture used for chemical strengthening of data recording disks is subjected to sub-micron filtration prior to use to remove certain impurities. Preferably, glass disks are chemically strengthened by ion exchange in a bath of molten sodium nitrate and potassium nitrate. A salt fresh mixture is prepared by starting with high-grade bulk salt in the intended proportions, melting the salt, and filtering the salt in a stainless steel filter, which is preferably approximately 2 micron or smaller. Filtration removes trace amounts of certain contaminants. The salt mixture thus prepared is then used for chemical strengthening of disks in the conventional manner.

Process for preparing ClO2 and coproducing organic salts and(or) compound fertilizer simultaneously

Abstract: The present invention discloses a process of producing ClO2 and inorganic salt, including potassium sulate, potassium nitrate, etc and compound fertilizer by utilizing the chlorate of alkali metal as main material, mineral acid as medium and urea and other reductant. The co-production process can produce high purity ClO2, no 'three waste', and low ClO2 producing cost.

Abrasive composition and method of grinding silicon oxide material using the same

Abstract: PROBLEM TO BE SOLVED: To provide an abrasive composition which can achieve the operation with high efficiency and high accuracy, maintain excellent particle redispersibility because the precipitation of the abrasive particles is inhibited, even when the composition is repeatedly used, and has high washability of the abrasive particles after the grinding operation, and provide a method of abrasive silicon oxide materials. SOLUTION: The objective abrasive composition is used for grinding silicon oxide materials and comprises the abrasive particles mainly including the oxides of rare earth metals including cerium, at least one of water-soluble salt selected from sodium nitrate, potassium nitrate, ammonium nitrate, ammonium cerium nitrate, sodium sulfate, potassium sulfate, ammonium sulfate and ammonium cerium sulfate. The composition is used for abrasive polishing silicon oxide materials.

Low humidity uptake solid pyrotechnic compositions and methods for making the same

Abstract: A solid pyrotechnic composition having a flame temperature and exhibiting ballistic performance comparable to that of black powder, but which is preferably formulated to contain neither charcoal nor sulfur, is provided. A solid pyrotechnic composition having a flame temperature and exhibits ballistic performance comparable to that of boron/potassium nitrate, and that is preferably free of boron, is also provided. A process for making the solid pyrotechnic compositions is provided.

Novel method for preparing potassium nitrate by utilizing salt lake potassium resource and nitratine

Abstract: The method for extracting potassium nitrate by utilizing potassium resource of salt lake and natural nitratire includes the following steps: mixing salt lake potassium resource ore and natural nitratire and water and/or potassium nitrate mother liquor together; regulating mass ratio of potassium, nitrate radical and water in the mixture to make the above-mentioned mixed material implement thermalsolvation and conversion reaction to form solid-liquid mixed slurry; and separating to obtain thermosolved saturated clear liquor; cooling said clear liquor to room temp. and separating out potassiumnitrate, then returning the potassium nitrate mother liquor back into thermal solvation section for reuse. Its yield rate is up to above 90%.

Saturated Vapor Pressure Over Melts of the Binary System NaNO2-KNO3

Abstract: The partial pressures of sodium nitrite and potassium nitrate over melts of the binary system NaNO2-KNO3 were measured at 798, 823, and 848 K. Negative deviations of the vapor pressure from Raoult's law, which decrease with increasing temperature, are established. Coefficients A and B of the Clausius-Clapeyron equation, partial molar heats of vaporization, activity and activity coefficient are calculated as functions of composition for potassium nitrate.

Process for preparing filtering agent of potential controlled electroly sis-type NO gas sensor

Abstract: The invention belongs to the method for preparing the filtering agent of the nitrogen monoxide sensor in control electric potential of electrolysis type. Potassium bicarbonate, potassium carbonate, potassium nitrite and potassium nitrate are prepared to be as watery saturated solution. With being crashed, ball milled and rinsed, the zeolite is dipped in the said saturated solution. Then it is taken out for heat drying at temperature 80-100 deg.c on the enamel disc, repeated dipping and heat drying so as to obtain the filtering agent of the nitrogen monoxide sensor. The filtering agent provides every good effect for filtering SO2 and H2S gases, with density of disturbing gas being less than 0.2% and the filtering efficiendy reaches up to 95%. The invented filtering agent possesses the features of easy operation and better stability.

Improvement in Electrochemical Synthesis of Expanded Graphite

Abstract: The influential factors during the process of electrochemical production of expanded graphite were investigated by orthogonal method,and the sequence of factors influencing the ratio of expansion was obtained,which was, from strong to weak,the mass fraction of sulfuric acid,the electric voltage of electrolysis,the reaction time,the mass ratio of solid to liquid(the ratio of graphite to sulfuric acid and potassium nitrate) and the content of oxidizing agent. The optimum technical parameters were determined,namely, potassium nitrate used as oxidizing agent, m (H 2SO 4)∶ m (KNO 3)=22∶1,the concentration of sulfuric acid approximately 85%,voltage of electrolysis 1 8 V,electrolysis time 3 5 h and the weight ratio of solid to liquid (0 11-0 14) g/mL.In the expansion process,both the temperature and the expansion time played key roles,which had direct influence on the quality of the product.The optimum conditions of expansive process were determined that the temperature was 850 ℃or so,and the time was 30 s.The ratio of expansion was up to 205 mL/g.

Culture medium for inducing adventitious bud from white birch leaf blade

Abstract: A culture medium for inducing adventitious bud from white birch leaf features that it is based on the cultural medium MSB5, which is prepared from 19 components including potassium nitrate, ammonium nitrate, nicotinic acid, inositol, cane sugar, etc. and contains also additional components including 6-BA, NAA and IBA. Its advantages are high inductivity and multiplication rate.

Leaf feed aerosol fertilizer

Abstract: agriculture. SUBSTANCE: the fertilizer contains inorganic fuel - magnesium and mixture of salts containing micro- and macroelements at the following ratio of components, weight%: inorganic fuel - magnesium 5.0-15.0, potassium nitrate 50.0- 65.0, potassium permanganate or manganese sulfate 8.0-10.0, ammonium molybdate 0.1-3.0, zinc sulfate 0.1-3.0, calcium carbonate or sulfate 8.0-12.0, superphosphate 6.0-8.0, borax or boric acid 6.0-8.0, technological supplements to simplify pressing and copper sulfate 0.1-12.0. Fertilizer provides even distribution of nutrition on plant's surface for, at declared ratio of components, it steadily burns and develops aerosol consisted of highly dispersed particles which contain micro- and macroelements and carbon dioxide-bearing gaseous phase. EFFECT: higher efficiency of leaf feed nutrition. 1 tbl

Primer mixture without toxicity

Abstract: A non-toxic primer mix including both bismuth sulfide and potassium nitrate as the pyrotechnic portion of the primer is disclosed. In a further embodiment, a non-toxic primer mix comprising zinc sulfide and aluminium nitrate as the pyrotechnic portion of the primer mix is disclosed. Bismuth and zinc sulfide act as fuels for the oxidizers of potassium and aluminum nitrate in providing an ignition flame for the primer. The non-toxic primer mix further contains a lead-free explosive material, and additionally can include added fuels, sensitizers, explosives and binders.

Fertilizer useful in agriculture comprises a mixture of peat, guano and potassium nitrate

Abstract: Fertilizer comprises a mixture of peat, guano and potassium nitrate. An Independent claim is also included for production of the fertilizer by mixing dried and ground peat with dried and ground guano, grinding the mixture with additives (I), adding additives (II), including potassium nitrate, adjusting the moisture content of the mixture, and screening the product.

Latent heat cooling agent

Abstract: PROBLEM TO BE SOLVED: To sufficiently reduce the supercooling of a latent heat cooling agent having (-3)-(-12) deg.C melting temperature to reduce the consumption of useless solidification energy in a solidifying-melting cycle. SOLUTION: An aqueous solution of sodium carbonate is used as a cooling medium, and ammonium dihydrogen phosphate is dissolved therein as an agent for preventing the supercooling. In other aspect, an aqueous solution of potassium nitrate is used as the cooling medium, and sodium sulfate decahydrate is dissolved therein as the agent for preventing the supercooling.