61 results about "Selenic acid" patented technology

A Se-enriched plant growth regulator is an aqueous product prepared from the sodium (potassium or ammonium) selenate (or selenite) and the sodium (potassium or ammonium) salt of 5-nitroguaiacol, 2,4-dinitrophenol, or catechol. Its advantages are high chemical and physical stability, and high effect on increasing the content of organoselenium in grains of crops and promoting photosynthesis.

The invention relates to a preparation synthetic method of polysaccharide selenic acid ester of organic selenium, in particular to a selenic acid esterification of polysaccharide in the medium of dioxane or toluene. A heterogeneous reaction is adopted in the preparation and the amount of the selenium oxychloride used is small, while the efficiency of polysaccharide selenizing reaction is greatly improved. The pure selenizing product is obtained by filtering and washing after the reaction. The production is easy to be expanded due to the heterogeneous suspended selenic acid esterification. Polysaccharide selenic acid ester is easy to be separated, and reaction medium and washing solvent can be recycled, so no environment pollution is caused.

The invention belongs to the technical fields of selenium-containing fruit stem smears for fruits and vegetables, preparation processes and use methods thereof and discloses a selenium-containing fruit stem smear for f fruits and vegetables as well as a preparation process and a use method thereof. The selenium-containing smear is characterized by comprising the following materials by weight: 100kg of refined wool oil, 6.5-13 kg of refined food-grade compound amino acid powder, 0.06-0.6 kg of pure selenium contained in selenite or selenic acid and 10-13.5 kg of water. The materials are chelated and homogeneized, so that the selenium-containing fruit stem smear for fruits and vegetables can be attached to the fruit stems for a long term and can not be taken away by wind and rain; since theselenium element is directly absorbed by fruits without being consumed by other parts of plants, absorption rate is improved so that the fruits and vegetables which have stems contain high selenium contents; and the preparation method and use method are convenient for operation and are beneficial to popularization.

The invention provides a polymer nano hydrogel. A polymer matrix of the polymer nano hydrogel comprises a block copolymer with the structure shown in a formula (I) or a formula (II) in the specifications, and the block copolymer is subjected to internal crosslinking through Se-Se bond molecules. The invention further provides a preparation method of the polymer nano hydrogel. In the polymer nano hydrogel provided in the invention, the polymer matrix comprises a poly(L-glutamic acid) chain block containing carboxyl, the carboxyl is sensitive to a pH value and ion strength in a water solution, and the Se-Se bond is sensitive to both reductant and oxidant: in an oxidant environment, the Se-Se bond breaks to generate selenic acid and realize decrosslinking, and in an reductant environment, the Se-Se bond is reduced into selenol to realize decrosslinking. Therefore, the polymer nano hydrogel provided in the invention is simultaneously sensitive to the pH value, the ion strength, the oxidant and the reductant, and can realize quick drug release in target cells so as to improve the curative effect of the drugs.

The invention relates to a degradation agent of the pesticide residue of Chinese herbal medicine and a production method thereof, which utilizes mirco-nano biological coating technology, enzyme active substance control and a stabilization system of active plant cell film and assists with an intelligent slow / controlled release adjuvant, thus promoting crop output and quality, degrading hazardous substances of the pesticide residue and enhancing products to achieve the international standards. The invention contains the components of oligosaccharide, selenic acid lipopolysaccharide, plant humic acid, rare earth, pectin, phytoalexin, organic matters, abscisic acid, vanillic aldehyde, amino acid, boracic acid, zinc sulfate, nicotinamide, sodiumnitro phenolate, phytic acid, ferrous sulfate, lycine, gibberellinn and chelated calcium; process water is added in sequence according to the weight mixture ratio; the mirco-nano technology is adopted and a product is obtained through coating, enveloping, technique processing treatment of mirco-nano structure, dynamic dissolution, high-pressure spray homogenization, filtering, mixing and reaction.

The invention relates to a method for comprehensive recovery of lead, mercury and selenium in copper smelting acid mud, and belongs to the technical field of comprehensive utilization of solid waste.The method for comprehensive recovery of lead, mercury and selenium in copper smelting acid mud specifically includes the following steps that copper smelting acid mud and a nitric acid solution are mixed at a liquid-solid ratio of 5:1, the stirring rate is 500 r / min, and sodium hypochlorite is gradually added and reacted at normal temperature for 60 minutes to obtain a mixed solution containing mercury chloride and selenic acid; separated filter residues are sent to a lead smelting system for recycling, and sodium hypophosphite is added into filtrate to reduce ionized mercury in the solutionto settleable elemental mercury, after flocculation and sedimentation, the mercury-containing slag is separated by microfiltration, and refined mercury is obtained by continuous rectification and purification; and sodium sulfite is added into the filtrate for reduction to obtain crude selenium, and the wastewater can be returned to the leaching process for recycling after neutralization reaction.The method for comprehensive recovery of lead, mercury and selenium in copper smelting acid mud adopts leaching and sectional reduction to realize effective separation of mercury and selenium, the recovery rate of selenium is 98.7%, and the recovery rate of mercury is up to 98.9%. The operation is simple, the cost is low, and the lead-containing filter residue returning process after leaching canrealize comprehensive utilization of resources.

The invention provides a health-care product capable of supplementing multiple trace elements. The health-care product is prepared from the following raw materials in parts by weight: 30-40 parts of calcium lactate, 20-30 parts of zinc lactate, 20-30 parts of magnesium lactate, 10-20 parts of ferrous lactate, 1-10 parts of manganese gluconate, 1-5 parts of copper gluconate and 0.1-1 part of selenic acid lipopolysaccharide. The health-care product has the advantages that the multiple trace elements are scientifically mixed together, the raw materials are subjected to microwave baking, sterilized and ground into finely pulverized powder, the lactate series trace elements and the gluconic acid series trace elements which have high solubility, fast solution rate, high bioavailability and good mouth feel are adopted and have the effects of assisting human bodies in absorbing the trace elements, reducing the morbility of osteoporosis, preventing cardiovascular diseases, resisting tumors and enhancing the metabolism and immunity of the organism, and especially the selenium can form antioxidant enzymes in vivo and has the effects of protecting cell membranes from undergoing oxidative damage, maintaining the permeability of the cell membranes, reducing the toxic effect of poisonous substances and preventing cancers.

The invention discloses a method for separating and recycling sulfur, iron and selenium from selenic acid mud, which comprises the following steps: firstly, adding elemental sulfur soaked in keroseneinto selenic acid mud, filtering and separating hot kerosine containing the elemental sulfur and desulfurization slag containing selenium and iron; separating the elemental sulfur out after cooling the hot kerosene; secondly, adding the desulfurization slag containing selenium and iron to a mixture solution of sulfuric acid and sodium chlorate, filtering and separating oxidized leaching solution and residual slag containing iron, adding sodium sulfite and thiourea into the oxidized leaching solution sequentially, and finally obtaining coarse selenium and a solution after selenium sunk throughreduction. The total recovery rate of sulfur is 97- 98%, the grade of selenium reaches 92-93%, and the total recovery rate of selenium is 94-95%. The invention has the advantages of convenient operation, simple equipment and high value in application.

The invention discloses a method for transforming methane into other organic matters, which comprises the concrete step that the methane has oxidation reaction in acid media under the action of an oxidizing agent and catalysts, and is characterized in that the oxidizing agent is one of selenium trioxide, selenic acid, percarbamide, sodium percarbonate and peroxy-disulfuric acid; and the acid media are one, or a mixture of a few components of trifluoroacetic acid, trifluoromethanesulfonic acid, methanesulfonic acid, selenic acid and sulphuric acid. The method provides a novel oxidizing agent and the acid media, and has the advantages of easy control of reaction media and simple operation process.

The invention discloses a method for catalytically reducing selenium. According to the method, by using oxydol as a catalyst, a reducer is added into a hexavalent-selenium-containing solution to react so as to reduce the selenium into the selenium simple substance, wherein the standard oxidation-reduction potential of the reducer is lower than the standard oxidation-reduction potential in the process of converting the hexavalent selenium into the selenium simple substance. The hexavalent-selenium-containing selenic acid or selenate solution is reduced by one step to prepare the simple substance selenium product. The oxydol, which is used as the catalyst, effectively lowers the descending speed of the solution reduction potential on the premise of performing the catalytic function, so that the reduction reaction process is carried out mildly, thereby effectively preventing the selenium in the solution from overreduction to generate negatively bivalent selenium ions or compounds thereof, and solving the problems of low recovery rate and the like caused by selenium overreduction.

The invention discloses a method for preparing selenium nano-particles by taking secretion of microbial cells as a matrix, belonging to the technical field of synthesis of nano-particles. The method for preparing selenium nano-particles by taking secretion of microbial cells as a matrix is technically characterized by comprising the following steps: inoculating 30-100mL of water with microbial single colonies and adding a sugary solution with mass concentration of 0.2-1.6%; oscillating for 24h, then adding 1-5mmol of selenium powder, selenic acid or sodium selenite, putting the mixed solution in a constant-temperature constant-speed shaker and oscillating for 3-24h at 20-60 DEG C at an oscillating speed of 100-600r / min; and centrifuging, collecting precipitate, washing and drying to obtain selenium nano-particles with particle size of 3-8nm. The method disclosed by the invention has the advantages of environment friendliness, good biocompatibility, simple preparation process and the like.

The invention discloses a method for preparing selenic acid arginine and application of the selenic acid arginine. A novel organic selenium source is prepared by using arginine and SeO2 as raw materials and using a chemical synthesis method to introduce selenic acid radicals into arginine molecules. The structure (shown in an attached figure 1) of the selenic acid arginine is analyzed and determined by using the techniques of a high-efficiency liquid chromatography, an infrared spectrum, a nuclear magnetic resonance spectrum and the like. The selenic acid arginine has low toxicity, is easy to absorb, and can serve as a novel selenium-supplementing preparation used in the fields of medicaments, health products, cosmetics and the like.

This invention discloses a solar battery film material of the CuIn(1-x)GaxSe2 preparation technology. This invention uses Cu,In,Ga metal salt and sub-selenic acid as main material, and the organic agent can dissolve in alcohols as electrolyte; and it uses metal molybdenum sheet or stainless steel sheet as cathode, platinum titanium metal net as assistant electrode, calomel saturated electrode as the vs-electrodes; the constant electric potential deposition prepares CuIn(1-x)GaxSe2 film front driving part, then it obtain CuIn(1-x)GaxSe2 film after cleaning, drying, heat dealing under argon. The advantage in this invention is that the material using rate is high, the technology is easy to control.

The invention discloses a suspension liquid-state iron-containing composite reagent as well as a preparation method thereof and a method for efficiently removing selenate in water and belongs to the technical field of water treatment. The method for efficiently removing selenate in water comprises the following three steps: step one, preparing the suspension liquid-state iron-containing composite reagent from zero-valence iron powder, water, hydrogen peroxide and hydrochloric acid; step two, removing selenate by using the suspension liquid-state iron-containing composite reagent, and integrally adding the prepared suspension liquid-state iron-containing composite reagent containing a solid phase, a colloidal phase and a liquid phase into selenate-containing water to be treated; and step three, carrying out solid-liquid separation. The suspension liquid-state iron-containing composite reagent has the advantages that the iron-containing composite reagent is simple to prepare and low in cost of raw materials, the iron-containing composite reagent contains a plurality of reduction active components, the removal of selenic acid through a reduction method is facilitated, and the iron-containing composite reagent is rich in colloidal phase and high in efficiency of transferring mass with solution, has both adsorption and flocculation effects, is capable of efficiently removing selenate, can still efficiently operate in the co-presence of anions such as high-concentration sulfate radicals and the like, is especially applicable to high-salt selenium-containing wastewater, is environmental-friendly, and is free of secondary pollution.

A glycosylated grain's protein-Se compound used as the Se-supplementing additive of food is prepared through the reacting between the active chemical radical of glycosylated grain's protein and selenic acid or seleninic acid, centrifugal separating, and filtering or spray drying to obtain the powdered product.

The invention discloses a cultivating and planting method of selenium-enriched ganodorma lucidum. The method comprises the following steps of a, culture material preparation: 10 parts of cotton seed hull, sophora fruit powder, 4 parts of purple sweet potato anthocyanidin, 5 parts of vitamin, 1.5 parts of selenic acid amino acid rare earth, 2 parts of sodium selenite, 4 parts of monopotassium phosphate, 4 parts of gypsum, 1 part of tobacco and 2 parts of distiller's grain powder are mixed and then bagged and subjected to high temperature sterilization at normal temperature and pressure; b, inoculation: after a fungus species bag is cut by a blade, the fungus species is placed into a sterilized container such as a washbasin and split into small pieces, handful fungus species is grasped and scattered into a bag rapidly, the cut-log section is covered with the fungus species, the bag opening is tightened after inoculation, and sundry fungi are prevented; not only is a sufficient selenium source provided for ganodorma lucidum growth, but also the selenium source is safe and reliable, the content of the organic selenium in the culture medium is high so that the ganodorma lucidum can absorb enough organic selenium in the growth process, the content of the organic selenium in the ganodorma lucidum body is improved, and the nutritive value and the medicinal value of the ganodorma lucidum are increased.

The invention discloses a preparation method of sCVPs (selenic acid esterified catathelasma ventricosum polysaccharides). A method for preparing CVPs comprises the following steps: catathelasma ventricosum is freeze-dried and ground into powder, the powder is subjected to water extraction and alcohol precipitation with ethanol and subjected to protein removal, small-molecular-weight impurity removal and the like, and the CVPs are obtained. The method for preparing the sCVPs comprises the following steps: 500 mg of CVPs are placed in a three-mouth flask, an HNO3 aqueous solution is added, the mixture is heated and stirred, the CVPs are totally dissolved, and Na2SeO3 and BaCl2 are added respectively when water bath is heated to 70 DEG C, and the mixture has a reaction for 10 h; after the reaction, the product is cooled rapidly to the room temperature, pH is regulated to 6 by anhydrous Na2CO3, then anhydrous Na2SO4 is added to precipitate excess BaCl2, centrifugation, precipitate removal and dialysis are performed, a small quantity of a dialysate is taken and added with vitamin C for detection, dialysis is stopped when red disappears, and powder obtained after freeze-drying is the sCVPs.

The invention relates to a preparation synthetic method of polysaccharide selenate of organic selenium, in particular to a selenic acid esterification of polysaccharide in a medium of dioxane or toluene. A heterogeneous reaction is adopted in the preparation method and the amount of the selenium oxychloride used is small, while the efficiency of polysaccharide selenizing reaction is greatly improved. A pure selenizing product can be obtained by filtering and washing after the reaction. The production is easy to be expanded due to the heterogeneous suspended selenic acid esterification. Polysaccharide selenate is easy to be separated, and the reaction medium and a washing solvent can be recycled, so no environment pollution is caused.

The invention relates to a cultivation method for selenium-enriched oyster mushrooms with small mushroom caps and large stipes. The cultivation method comprises the following steps: preparing a cultivation bag; sterilizing; cooling; inoculating; managing a greenhouse, and the like. The total selenium amount of selenium-enriched cultivation materials is 10-50mg / kg and selenic acid arginine is used as a selenium source; main materials and auxiliary materials adopted by the selenium-enriched cultivation materials are as follows in dry parts by weight: 45% of corncobs, 45% of cottonseed hulls, 9% of bran, 1% of corn meal and 0.05%-0.1% of lime. The selenic acid arginine is used as the selenium source so that the toxin is small and the safety is high; the absorption utilization rate of the selenium is high. The selenium content of sporocarps of the obtained selenium-enriched oyster mushrooms is high, the residual amount of the inorganic selenium is less and the eating safety is high; the disadvantage that the selenium content of the oyster mushrooms is lower is made up and the nutritional health value of the oyster mushrooms is improved. The sporocarps of the selenium-enriched oyster mushrooms have the small mushroom caps and the large stipes, the mouth feel and the appearance quality of the selenium-enriched oyster mushrooms are greatly enhanced and the commodity value of the oyster mushrooms is improved.

The cotton function promoter is compounded with selenic acid, tannic acid, aluminum trichloride, ferric trichloride, defoaming agent, alpha-acid, citric acid, lactic acid, and aglycone butter fat, and through stepped mixing while stirring, and packing. The present invention features the high bollworm preventing and controlling effect, protection of natural enemy to bollworm and no environmental pollution.

The invention discloses a novel selenic acid biological material with an anti-aging function, which is prepared by the following steps: taking arginine and SeO2 as raw materials, leading selenic acid-perssad into the arginine by utilizing a chemical synthesis method, and preparing a new organic selenium source. The selenic acid has an obvious anti-aging function, and is low-toxic and efficient, thus being served as a new supplemental se preparation to be used in the fields such as medicament, health-care products, cosmetics and the like.

A process for in-situ growth of zinc selenide nanocrystals in SiO2 gel glass matrix features that the reagent for gel glass contains ethyl ester of normal acid, absolute alcohol and selenic acid as hydrolyzing catalyst, the Se and Zn sources are introduced in zinc selenate form, after the sol is poured in culture dish and the culture dish is covered by filter paper. It is laid aside for more than6 weeks to obtain transparent dried gel, and the dried gel is thermally treated by two steps to obtain zinc selenide.

The invention belongs to the technical field of polysaccharide preparation, and relates to selenic acid esterified Polygonatum odoratum polysaccharide and a preparation method thereof. The method comprises the following steps: extraction of a Polygonatum odoratum polysaccharide solution, reaction of polysaccharide and Na2SeO3, Ba<2+> precipitation, esterification of Polygonatum odoratum polysaccharide with selenic acid and the like. Polygonatum odoratum polysaccharide and sodium selenite are used as raw materials; the selenium content and the yield of a synthetic product are used as inspectionindexes; the raw material ratio, the reaction temperature, the nitric acid concentration and the reaction time are taken as preparation parameters, and the synthesis process conditions of the Polygonatum odoratum polysaccharide selenate are optimized; the selenic acid esterified Polygonatum odoratum polysaccharide is subjected to antioxidant research, and the result shows that the maximum scavenging rate of the selenic acid esterified polygonatum odoratum polysaccharide to Fe<2+> is 22%; the selenic acid esterified Polygonatum odoratum polysaccharide also has a certain scavenging capability on superoxide anion free radicals, and the maximum scavenging rate is 17%, so that a theoretical basis is provided for full development and utilization of Polygonatum odoratum resources.

The invention provides application of chitosan selenite in preparation of a medicament of treating liver cancer. Researches show that selenium is one of necessary trace elements in human bodies and animal bodies, and the selenium has remarkable prevention and treatment effects on multiple tumors. Chitosan [beta (1,4)-2-amino-2-deoxy-D-dextrose] is alkali biological polysaccharide in the natural world, carries positive electricity under the acid condition, can be neutralized with negative ions on the surfaces of tumor cells by adsorption and discharge to resist the growth of the tumor cells, has multiple biological activities such as tumor resistance, inflammation resistance, bacteria resistance and the like, has good biocompatibility, nearly has no toxicity and has no other adverse reactions; and the chitosan selenite is low molecular weight organic selenium prepared by adsorbing selenic acid radicals on chitosan monomers 2-NH2 and 6-OH, has stronger anti-tumor effect, and has lower toxic or side effect.

The present invention concerns pharmaceutical composition of selenium (or its salts or derivatives or any other selenium comprising compound) and a method of its use for the prevention of breast / ovarian cancers, especially in carriers of BRCA1 mutations. Preferred compounds are selenic acid and its salt, selenomethylcysteine, methylseleninic acid, selenomethionine and selenocysteine.

The invention provides a compound selenic acid lipopolysaccharide emulsifiable paste for preventing and treating radioactive injury and a preparation method. The compound selenic acid lipopolysaccharide emulsifiable paste for preventing and treating radioactive injury takes selenic acid lipopolysaccharide as a main formula for improving the immunocompetence of skins and antioxidant ability, and is compounded with an external emulsifiable paste with vitamin E-assisted potentiation. The compound selenic acid lipopolysaccharide emulsifiable paste through verification of clinical results has protective effect on radioactive injury of skins, and vitamin E and selenic acid lipopolysaccharide have the antioxidant effect by adjusting the immune metabolism and enhancing the activity of GSH-PX (Glutathione Peroxidase). The compound selenic acid lipopolysaccharide emulsifiable paste provided by the invention has the advantages of simpleness in manufacturing, low cost, strong applicability, convenience in popularization and the like, and no adverse reactions appear in clinical use.

The invention provides a copper-aluminum composite material, the raw materials of which are calculated by weight: 30-40 parts of aluminum, 20-30 parts of copper, 6-10 parts of silver, 5-7 parts of tin, 3-5 parts of manganese silicide, rare earth 2 to 4 parts, 2 to 4 parts of cobalt oxide, and 1 to 2 parts of yttrium oxide, and the soft state pure copper plate is degreased, degreased, derusted and roughened by steps (1); (2) washing with selenic acid; ( 3) Place the copper plate obtained through step (1) in the refractory mold, and keep the cavity on both sides of the copper plate, and preheat to 300-500°C; (4) Put aluminum, silver, tin, manganese silicide, rare earth, Putting cobalt oxide and yttrium oxide into a melting furnace for melting; (5) putting the molten solution of step (4) into an induction furnace and performing electromagnetic stirring; (6) pouring the stirred molten solution of step (5) and cooling to room temperature to obtain copper aluminum alloy. The invention can effectively improve the distribution of each molecule of the composite material, make the distribution of each molecule more uniform, have more prominent functions, and have good electrical conductivity and wear resistance.

The invention discloses a selenium-enriched straw mushroom cultivation medium, which comprises the following components in parts by weight: 98-114 parts of straw, 92-96 parts of selenium-enriched ricehusks, 53-57 parts of fruit and vegetable slag, 31-35 parts of rapeseed cake, 23-27 parts of bean pulp, 20-24 parts of bone powder, 18-22 parts of selenic acid amino acid rare earth, 9-13 parts of animal feces, 7-11 parts of peanut shells, 6-8 parts of eggshell powder, 5-7 parts of nano selenium powder and 3-5 parts of gypsum powder. The prepared selenium-enriched straw mushroom cultivation medium provides selenium for straw mushroom cultivation, and improves the selenium ingredient content in straw mushrooms; optimizes the composition structure of the medium, so that the yield of the straw mushrooms can be effectively increased; and the composition of the medium is easy to obtain, and the cost is low.