421 results about "Magnesium acetate" patented technology

The invention relates to a pathological examination, in particular to a liquid-based cell preservation solution used in cytopathological examination of human cervical mucus, sputum, urine, pleural fluid, tracheal mucus and the like. It is characterized in that it is prepared from alcohols, sodium phosphate buffer, edetate disodium, sodium chloride 0.08%-0.12%, potassium chloride, formaldehyde, dithiothreitol, calcium acetate, magnesium acetate, etc. As a result, it can not only maintain the stability of the cell structure. It can reduce the agglomeration and precipitation of cell mucus and the loss of cell rupture, and can also make cells easy to stain, improve the clarity of cell preparation, facilitate the smooth progress of pathological examination, and the cost is low, which is conducive to popularization and use.

The invention discloses an isothermal amplification kit for detecting SARS-COV-2 and a primer probe set. The kit comprises (1) inactivated lysate; and (2) an isothermal amplification system: a reaction buffer solution Buffer A, magnesium acetate Buffer B, negative control, nuclease-free water, a primer probe set and RAA enzyme. The lysate is used for rapid inactivation and release of viral nucleicacid, an isothermal amplification technology is utilized for rapidly enriching and amplifying a target area, whether a specific amplified product exists is rapidly determined through combination of aprobe with modification groups and a product with biotin, by a lateral chromatography technology and by use of colloidal gold developing. The kit is simple to operate, professional extraction reagents and detection instruments are not required limitation of detection laboratories and professionals is freed, the kit can perform rapid detection in an instrument-free state outdoors, the whole process only needs 30 min, and reading is very convenient.

The invention provides an aqueous pharmaceutical composition for administration as an aerosol to the respiratory tract, nose or oropharyngeal region comprising (i) a macrolide having a poor taste and poor chemical stability in aqueous solution; (ii) at least one salt selected from the group consisting of sodium gluconate, sodium aspartate, sodium acetate, sodium lactate, sodium succinate, sodium maleate, magnesium gluconate, magnesium aspartate, magnesium citrate, magnesium acetate, magnesium lactate, magnesium succinate, and magnesium maleate; or mixtures thereof and (iii) a taste-masking agent different from said salt; wherein (a) the concentration of said macrolide in the composition is in the range of about 0.25 wt.-% to about 15 wt.-%; (b) the molar ratio of said macrolide:said salt is in the range from about 1:0.5 to about 1:100; (c) the pH of the composition is in the range of about 3 to 9; and (d) the osmolality of the composition is in the range of about 150 mOsmol/kg to about 1500 mOsmol/kg. The invention further provides a method of generating an aerosol, preferably by means of a nebuliser, which uses such an aqueous pharmaceutical composition. The macrolide may be used alone or in combination with other drugs. The composition is suitable to treat inflammatory disorders and/or infections of the respiratory tract. It has an improved taste and stability.

The invention relates to an environment-friendly snow melting agent and a preparation method of the snow melting agent, and belongs to the field of the snow melting agents. The snow melting agent is prepared from acetates and chlorine salts with low corrosivity as the main raw materials by mixing acetates including potassium acetate, magnesium acetate and calcium acetate with calcium chloride and magnesium chloride in a certain proportion, as well as a small quantity of corrosion inhibitor. The common fault that a common inorganic snow melting agent is high in corrosivity is effectively overcome, the cost is reduced, and therefore the snow melting agent is suitable for promotion and application.

The invention relates to a preparation method of nickel cobalt lithium manganate as a high voltage lithium battery anode material. The preparation method comprises the following steps of adding a nickel salt, a cobalt salt and a manganate salt into a reaction kettle, adding a mixed solution of sodium hydroxide or potassium hydroxide and ammonium hydroxide, and reacting to generate nickel cobalt lithium manganate hydroxide precipitate; washing, filter-pressing and drying the precipitate to obtain nickel cobalt manganate hydroxide; carrying out ball milling on the nickel cobalt manganate hydroxide and a lithium salt, and uniformly mixing; sintering a mixed product so as to obtain the nickel cobalt lithium manganate; adding magnesium acetate and zirconium acetate in the deionized water, and preparing a mixed solution; and adding the mixed solution to a water phase system of the nickel cobalt lithium manganate, and drying; and carrying out high-temperature processing on the dried product to obtain a final product. The preparation method provided by the invention has the advantage that the capacity property and the cycling property of the lithium battery anode material can be effectively improved.

The invention relates to a method for preparing an efficient adsorbent through in-situ reaction. The method is characterized by firstly chemically absorbing magnesium ions in ducts and surfaces of porous materials, then adjusting the pH value to 8-11, generating magnesium hydroxide in situ and obtaining the efficient adsorbent porous magnesium oxide through calcining, wherein the adopted magnesium salts are at least one of magnesium chloride, magnesium nitrate, magnesium acetate and magnesium sulfate; the solvents of the magnesium salts are at least one of water and ethanol; the concentration of the magnesium salt solution is 5-40wt%; the calcination temperature is 300-600 DEG C; and the calcination time is 10-360min. The method has the advantages of simple needed equipment, short process flow, high preparation efficiency and low preparation cost. The prepared porous magnesium oxide has the advantages of large specific surface area, strong heavy metal ion adsorption capacity and high saturation adsorption, and has good industrial application prospects.

The invention relates to a preparation method of an efficient adsorbent porous magnesium oxide. The method is characterized by loading magnesium salts in ducts and surfaces of porous materials and obtaining the efficient adsorbent porous magnesium oxide through calcining, wherein the used magnesium salts are at least one of magnesium nitrate and magnesium acetate; the solvents of the magnesium salts are at least one of water and ethanol; the used porous materials are at least one of activated carbon, diatomite, silica gel and molecular sieves; the concentration of the magnesium salt solution is 5-40wt%; the calcination temperature is 300-600 DEG C; and the calcination time is 10-360min. The method has the advantages of simple needed equipment, short process flow, high preparation efficiency and low preparation cost. The prepared porous magnesium oxide has the advantages of large specific surface area, strong heavy metal ion adsorption capacity and high saturation adsorption, and has good industrial application prospects.

The invention relates to a preparation method of a rosin modified phenolic resin. The method comprises the following three steps of reactions: 1. performing condensation of tert-butylphenol, bisphenol A, tung oil and solid formaldehyde under the action of catalyst magnesium acetate and lime to generate polymer of hydroxymethyl tert-butylphenol; 2. performing an addition reaction with rosin to generate an addition product; and 3. performing esterification of the addition product, pentaerythritol and glycerin under the action of catalyst zinc chloride to generate the rosin modified phenolic resin. The preparation method adopts proper raw material proportioning, reaction temperature, reaction time, catalyst and other technical conditions, thus during the production process, the resin viscosity can be effectively controlled, and the operation is simple and flexible and has good effect. The quality of the product is increased, the oil solubility of resin is good, the oil medium viscosity is high, the normal heptane capacity is 4.5ml/g or more; and the prepared paint film ink has good water resistance and alkali resistance, high hardness, excellent anti-after-binding performance, quick-drying performance, lightness and strong adhesive force. Therefore, the preparation method of the invention is applicable to industrial production.

The invention discloses an environment-friendly salt for ice and snow melting and a preparation method thereof. The salt comprises, based on the weight percentage, the following compositions: 40% to 60% of snow-melting agent, 2% to 5% of heat-release agent, 10% to 40% of porous mineral aggregate, 10% to 20% of desiccator and 5% to 20% modifying agent. The method in the invention has simple process, low cost and good snow-melting effect; the snow-melting agent in the salt mainly comprises calcium acetate and magnesium acetate which have very small corrosivity to surrounding environment in comparison with the snow agent such as calcium chloride and sodium chloride used in MAFILON and other salts and can play a good role in environmental protection.

The invention discloses an isothermal nucleic acid amplification reaction reagent which comprises Tris buffer solutions, potassium acetate, magnesium acetate, dithiothreitol, polyethylene glycol, adenosine triphosphate (ATP), deoxy-ribonucleoside triphosphate (dNTPs), phosphocreatine, creatine kinase, a primer group, single-strand binding (SSD) protein, colon bacillus helicase RecQ protein, UvsY protein and DNA polymerase. The invention further discloses an isothermal nucleic acid amplification method which includes steps of extracting DNA or performing inverse transcription after DNA extracting, and adding the isothermal nucleic acid amplification reaction reagent and reacting the mixture at a temperature in a range between 25 DEG C and 45 DEG C for 10 minutes to 60 minutes to complete the nucleic acid amplification. Compared with traditional polymerase chain reaction (PCR) technologies and according to the technology, nearly no professional instrument is needed, the operation is simple, technical requirements for operators are low, and the reaction time only needs about half an hour.

The invention provides a capsule type snow ice melt inhibiting material doped into asphalt pavement filling materials in road building or pavement building, a preparation method and application thereof. The capsule type snow ice melt inhibiting material consists of a capsule wall, a capsule core and protection solution, wherein the capsule core is formed by mixing an absorbent with a grain diameter of 30 micrometers and a nanometer bone material, wherein the absorbent is modified by absorbing calcium acetate and magnesium acetate; the mass ratio of capsule wall chitosan or ethyl cellulose to polyethylene glycol is 1:1, the ratio of the mass sum of the modified adsorbent and the bone material to the capsule wall mass is 10:1; the mass ratio of the modified adsorbent to the bone material is 7:3; the mass ratio of the modified adsorbent to the calcium acetate to the magnesium acetate thereof is 2:1:1-2:1.2:0.8; the calcium acetate and the magnesium acetate solution are added into the adsorbent respectively; and the solution is oscillated on an oscillator at room temperature, and is stirred and oscillated continuously, and is filtered after standing; the capsule core is dispersed into the capsule wall solution, and is slowly dripped into the polyethylene glycol solution in stirring to prepare the snow ice melt inhibiting material to be doped into the asphalt pavement filling material after stirring, vacuum filtering, cleaning and drying.

The invention discloses an animal excrement fermented fertilizer and a preparation method thereof. The animal excrement fermented fertilizer is characterized by being prepared from the following raw materials in parts by weight: 75-85 parts of urea, 60-80 parts of potassium dihydrogen phosphate, 65-70 parts of saltpeter, 60-75 parts of potassium persulfate, 20-35 parts of cane sugar, 100-200 parts of rabbit excrement, 100-200 parts of pig excrement, 35-50 parts of plant ash, 2-3 parts of an EM bacterium agent, 15-25 parts of magnesium chloride, 20-30 parts of magnesium acetate, 50-85 parts of calcium nitrate and 10-12 parts of a soil activator. According to the invention, a soil improver comprises a jade composition, which contains a large number of micro elements good for a human body, and is beneficial for the human body; in addition, noxious heavy metal elements in the soil can be effectively absorbed and cured, and accordingly the heavy metal elements absorbed by the crop can be reduced; moreover, the nutrition facts of the rabbit excrement and the pig excrement are mutual complementary, as a result, the fermentation fertilizer combining the rabbit excrement and the pig excrement has more comprehensive, reasonable and uniform fertilizer nutrient compared with a single fermentation fertilizer, and crop absorption law can be better met.

The invention relates to medical titanium with a trace element slow-release function or a titanium alloy implant material as well as a preparation method and an application of the medical titanium. The invention adopts the technical scheme that the preparation method comprises the following steps: putting a polished titanium-containing metal sheet into an electrolyte as an anode for anodic oxidation; flushing and drying the titanium-containing metal sheet subjected to anodic oxidation, carrying out heat treatment for 1-3 hours at a temperature of 100-500 DEG C, naturally cooling and ultrasonically cleaning and drying; and putting the dried titanium-containing metal sheet into one of or mixed solution of more than any two strontium hydroxide, strontium acetate, zinc acetate or magnesium acetate, carrying out hydrothermal reaction for 0.5-12 hours in a closed container at a temperature of 100-300 DEG C, naturally cooling, taking out, cleaning and drying, and carrying out heat treatment for 1-3 hours at a temperature of 450-550 DEG C to obtain the medical titanium with the trace element slow-release function or the titanium alloy implant material. The medical titanium or the titanium alloy implant material as well as the preparation method and the application thereof have the beneficial effects that the preparation method is simple and reliable, the loading quantity and the release amount of trace elements of the medical titanium in a nano tube are controllable, the medical titanium and the biological activity on the alloy surface can be better promoted, and the application prospect is good in the medical implant material.

The invention discloses a modified spherical nickel cobalt lithium manganate NCM622 anode material. A general formula of the anode material is Li[NiCo0.2Mn0.2]xMg1-xO2-yFy, wherein x is greater than or equal to 0.01 and less than or equal to 0.05, and y is greater than or equal to 0.2 and less than or equal to 0.4. The preparation method includes following steps: (1), preparing a solution; (2), feeding nitrogen into a reaction kettle for 20 min, respectively adding the mixed solution in the step (1), NaOH solution of 1 mol/L in concentration and NH4OH solution of 0.5 mol/L in concentration, and stirring for reaction; (3), subjecting Ni0.6Co0.2Mn0.2(OH)2 precursor, battery-grade lithium carbonate, magnesium acetate and lithium fluoride to ball milling for mixing for 3-4 h; (4), performing solid-phase sintering. The modified anode material is high in stability and safety and excellent in cycling performance and multiple rate performance.

The invention relates to a road dust suppressant for controlling the inhalable particles in near-surface air and a preparation method thereof. The road dust suppressant comprises the following components in parts by weight: 100-150 parts of calcium magnesium acetate, 0.04-0.2 part of dust suppression aid and 300-1,800 parts of water, wherein the calcium magnesium acetate comprises 0.1-0.9 part of calcium acetate and 0.1-0.9 part of magnesium acetate; and the dust suppression aid is one of surfactants including sodium lauryl sulfate, alkylphenol polyoxyethylene ether TX-10, wetting agent X-405, sodium dodecyl benzene sulfonate, Tween and Span or a mixture of more than one of the surfactants. The road dust suppressant provided by the invention can effectively reduce the inhalable particles and harmful substances such as nitrogen oxides and sulfides on the road, and has the characteristics of environmental friendliness, low corrosion to vehicles and pavement, long-lasting effect and the like.

The invention relates to a multilevel porous molecular sieve catalyst as well as a preparation method and application thereof. The preparation method of the multilevel porous molecular sieve catalyst comprises the following steps: adding an organic template agent ethanol solution into an aluminum source, a silicon source and a silane ethanol solution to form gel, performing air drying on the gel to obtain dry gel, adding water and tetrapropylammonium hydroxide into the dry gel to obtain a mixture, putting the mixture into a high-pressure kettle, crystallizing the mixture for 3 days at the temperature of 180 DEG C to obtain a multilevel porous ZSM-5 molecular sieve, uniformly mixing the multilevel porous ZSM-5 molecular sieve with gamma-Al2O3, adding a dilute nitric acid solution, then performing mixed kneading, performing strip extruding for forming, drying and roasting in air so as to obtain a carrier; and soaking the carrier by utilizing a magnesium acetate solution, drying and roasting the carrier to obtain a phenylcarbinol alkylation catalyst. When the prepared catalyst is applied to the phenylcarbinol alkylation reaction, the catalyst has the advantages that coke and carbon are not easily generated, the activity is high, and the product selectivity is high. Compared with other catalysts in the prior art, for the catalyst disclosed by the invention, the activity and the reaction stability are high, and the service life is longer.

The invention relates to a method for uniformly drying lettuce by a normal pressure and negative pressure combined microwave spouted bed, and belongs to the technical field of fruit and vegetable food processing. The main processes of the method comprises: removing leaves and peels from fresh lettuce, cleaning, cutting into cubes (cutting into sheets), adding a EDTA-Na solution to carry out colorprotection, blanching, adding a magnesium acetate solution and a zinc acetate solution to carry out color protection, and carrying out treatments of microwave spouted drying, packaging and storage. With the present invention, the microwave drying technology is adopted so as to shorten the drying time, reduce the drying energy consumption, and reduce the loss of the chlorophyll in the lettuce during the processing process; the normal pressure spouted bed drying technology and the negative pressure spouted bed drying technology are combined to dry the lettuce, and the material has the circular motion, such that the disadvantage of the nonuniformity of the microwave drying is overcome; the product dried by the microwave spouted drying method has characteristics of good water reabsorbing capacity, high water reabsorbing rate, good crisp taste after water reabsorbing, unique lettuce aroma, high chlorophyll content, good and uniform color.

The present invention relates to pathological examination, especially to a liquid-based cell preservation solution used in pathologically examining cells such as human cervical mucus, sputum, urine, thoracic liquid, and tracheal mucus. The liquid-based cell preservation solution is characterized by being prepared from alcohols, a sodium phosphate buffer solution, disodium ethylenediamine tetraacetate, 0.08-0.12% sodium chloride, potassium chloride, formaldehyde, dithiothreitol, calcium acetate, magnesium acetate and the like. The cell preservation solution cannot only maintain the cell structure stability and reduce the agglomerated precipitation of the cell mucus and the cell breakage loss, but also enables the cells easily to be stained, improves the clarity of the cell sheets, and facilitates smooth performance of the examination work. Moreover, the cell preservation solution is low in cost and easy to promote and use.

The invention discloses a method for deacidification of paper by using an ultrasound-assisted deacidification agent. The method comprises the following steps of: putting paper, especially aged and acidulated paper into an ultrasonic treatment device, and treating the paper by using an aqueous solution of a deacidification agent (such as calcium hydroxide, borax or magnesium acetate and the like), a fatty alcohol solution or a mixed solution of fatty alcohol and water. By adopting the method, the pH value of the paper is controlled in the optimum range of 7.0-8.5; compared with soaking deacidification, the deacidification time is obviously shortened, and the deacidification is uniform; and meanwhile, the strength of the paper is obviously improved, and the mechanical strength of each item is greatly improved, so that the storage life of the paper is favorably prolonged.

The invention discloses cellulose acetate butyrate mixed ester with high butyryl content, and a preparation method thereof. The cellulose ester is prepared from the following components in parts by weight: 600 parts of wood pulp, 800-1200 parts of butyric acid, 2500-3500 parts of butyric anhydride, 20-40 parts of acetic anhydride, and concentrated sulfuric acid catalyst accounting for 5-10% of total weight parts of wood pulp. The preparation method comprises the following steps: activating, performing esterification reaction, mixing, adding magnesium acetate solution, hydrolyzing, performing chromatography, and then sequentially conventionally filtering, washing and drying to obtain a finished product. According to cellulose acetate butyrate mixed ester with high butyryl content, cellulose acetate butyrate with the butyryl content of 48-53% and acetyl content of less than or equal to 4% can be obtained after the combination according to specific formula and proportion, and the product is stable in performances. The preparation method is simple in steps, the preparation period is short, the preparation conditions are not strict and easily achieved, and especially, the activated solid is fed into a cooling liquid within 2-5min, so that the quality of products can be guaranteed while the fast follow-up reaction is guaranteed.

The invention discloses a method for preventing fruit cracking of melons. The method comprises the following steps of: spraying equal mass solutions of 800-1000 times of nucleotides and 800-1000 times of cytokinins on the melons and leaves per 3-5 days; or spraying anti-cracking agents on the melons per 3-5 days on the basis of 500-1000g/mu, wherein the anti-cracking agents are composed of 1-2 weight parts of sodium borates, 0.5-4 weight parts of CaCl2, 0.2-1.5 weight parts of sodium selenate, 3-5 weight parts of zinc gluconate, 20-40 weight parts of sodium silicate and the balance of water; or spraying the anti-cracking agents on the melons and the leaves per 1-2 days on the basis of 200-300g/mu, wherein the anti-cracking agents are composed of the following components by weight percent: 0.5%-1% of disodium octaborate tetrahydrate, 10%-15% of EDTA (ethylene diamine tetraacetic acid) calcium complex disodium salt, 13%-15% of EDTA magnesium complex disodium salt, 5-8% of isopentennyladenine, 3%-4% of disodium EDTA-copper, 0.3%-0.6% of sodium molybdate dihydrate, 1.5-3.5% of boric acids and the balance of water. According to the method provided by the invention, the fruit cracking is effectively prevented and the yield and quality are both high.

The invention discloses a porous carbon and a preparation method thereof. The preparation method of the porous carbon comprises the following steps: 1) 1 part by weight of petroleum residual oil and 3-9 parts by weight or organic magnesium salt are mixed and smashed, and then the temperature is increased to 700-1000 DEG C for carbonization for 1-2 hours, thereby obtaining carbonized products; the pressure of inert gas during the carbonization is 100kPa-105kPa; 2) the acid treatment is carried out on the carbonized products, then the carbonized products are washed until neutral, and the porous carbon is obtained after drying. The porous carbon obtained by the invention has high specific surface area (up to 1183m<2>/g) and good absorption performance; furthermore, the pore size can be regulated and controlled according to the needs of applications. The preparation method has the following advantages: the preparation method does not need to carry out the stabilization and the activation processes, and the operation is simple and easy; magnesium oxide particles generated after the carbonization are easy to remove and can be removed by weak acetic acid, thereby being capable of realizing the recycling of magnesium acetate and reducing the production cost; and the yield of the porous carbon is higher.

The invention discloses a preparation of cellulose acetate-butyrate, including steps of: crushing cotton pulp paper, activating it with organic acid for 2-24 hours at the temperature of 40-110 DEG C., charging acid anhydride and concentrated sulfuric acid, esterifying them at the temperature of 25-110 DEG C. for 3-24 hours; charging adequate magnesium acetate to neutralize residual concentrated sulfuric acid after esterification, then prcipitate and filter it in ethanol-water solution, and obtaining the cellulose acetate-butyrate after scrubbing and drying. The invention avoids using toxic solutions such as DMF, DMAC as activation solution, and uses organic acid both as solution and reaction reagent, so that damage to environment and human body in production process is reduced tremendously, and processes of production, after-treatment and product separation is simple. The prepared cellulose acetate-butyrate can be used as adjuvant of multiple paint, has properties of improving leveling, outdoor durability and toughness of paint, can be applied in biodegradable plastics and films.

The invention discloses a waterproof noise-reduction multifunctional woven fabric which is formed by weaving warp yarns and weft yarns by an air-jet loom, wherein the warp yarns and the weft yarns are prepared from the following raw materials in parts by weight: 30 to 36 parts of isotatic polypropylene, 10 to 14 parts of polyvinyl chloride, 20 to 24 parts of cowhair, 17 to 19 parts of alpinia fiber, 22 to 26 parts of kenaf fiber, 18 to 23 parts of cotton pulp, 7 to 9 parts of liquid paraffin, 8 to 10 parts of ethyl carbamate, 7 to 11 parts of polytetramethylene glycol, 1.1 to 2.5 parts of benzoyl peroxide, 2.1 to 3.2 parts of chitosan, 0.3 to 0.5 part of magnesium acetate, 2 to 4 parts of shell powder, 1 to 3 parts of rhizoma, 2 to 5 parts of mangnolia officinalis, 85 to 95 parts of 1-butyl-3-methyl imidazole acetate, 95 to 105 parts of 1-allyl-3-methyl imidazole chloride salt, a proper amount of water and 4 to 7 parts of assistant. The woven fabric has the advantages of warmth keeping, ventilation, wear resistance, antibacterial performance and the like.

The invention discloses a hydrogen peroxide stabilizer, the mass percentage of which is composed of: 15-30% of organic phosphonic acid; 10-15% of magnesium salt; 55-75% of distilled water; the sum of each component is 100%. Magnesium salts include magnesium chloride, magnesium sulfate, magnesium acetate, magnesium nitrate or magnesium perchlorate; the organic phosphonic acid has the structure of general formula (1), wherein R represents a substituent, which is an alkyl group or a heteroatom-substituted alkyl group ; n represents the number of phosphonic acid groups connected to the substituent R, and n=2-5. Under the synergistic action of organic phosphonic acid and magnesium salt, the stabilizer of the invention can effectively realize the stabilization of hydrogen peroxide under strong alkaline conditions.