243results about How to "Moderate pH" patented technology

The invention discloses a mixed plant culture medium and a preparation method thereof. The culture medium comprises peat and an agricultural and forest residue compositing fermentation medium, wherein the volume proportion of peat to agricultural and forest residue compositing fermentation medium is (30-50):(50-70). The mixed culture medium prepared by the method in the invention has the advantages of balanced nutrition, high nutrition component contents and stable physical property. The mixed culture medium prepared by the method in the invention is reasonable in nutrition structure and convenient for absorption of foliage plants and meets the growth requirement of the foliage plants, thereby improving the culture survival rate and viewing effect of the foliage plants.

The invention provides a method for preparing micron spherical silver powder and belongs to the technical field of solar cells. PEG-6000 and PEG-4000 serve as dispersing agents, and the method comprises the following steps of: preparing silver nitrate and ascorbic acid solution with a certain concentration, preparing mixed solution of the dispersing agents and ascorbic acid, regulating the pH value of the reaction solution through ammonia water, dripping a reducing agent and the ascorbic acid into the silver nitrate solution, and performing ultrasonic dispersion treatment, standing, separating, washing and drying after the dripping is ended. The obtained spherical silver powder has smooth surface, high uniformity, high dispersibility and a certain glossiness, the impurity content is less than 3*10 to the power of -4, the specific surface area is 0.2 to 1.2m<2>/g, the tap density is 3.8g/ml, the particle size distribution is 1.15 to 3mu m, and the performance requirement of the solar silver paste can be well met.

The invention provides the application of a silkworm raising byproduct of a silkworm excrement fermentation waste to the edible fungus culture. The silkworm excrement is taken as the biogas fermentation raw material; and the marsh liquid and marsh refuse after the biogas fermentation can be further reutilized. The marsh liquid can be taken as the liquid fertilizer for the earthing edible fungus culture after being processed; and the marsh refuse can be taken as the fungus culture material after being processed. Therefore, the edible fungus culture cost can be reduced. While another silkworm raising byproduct of mulberry twigs can be prepared into fungus rods for the production of the edible fungus after clipping, crushing, sterilization and inoculation. The invention can improve the comprehensive utilization of the silkworm raising byproducts, reduce the environmental pollution, realize the cyclic production of the edible fungus, and reduce the production cost of the edible fungus.

The invention discloses a composite substrate water retaining agent. The water retaining agent comprises an additive and an adhesive, wherein the additive comprises soluble starch, bamboo charcoal powder or corncob pyrolysis powder; and the adhesive is beta-cyclodextrin and sodium carboxymethyl cellulose. The environment-friendly substrate water retaining agent is prepared from raw materials which are natural, pollution-free, wide in source and easy to degrade, has high water absorbing capacity and water retaining efficiency, can replace an expensive high molecular compound water retaining agent, and solves the problems that culture substrates (such as peat, turf and soil) in agriculture and forestry production and floriculture have low water retaining capacity, the common high molecular compound is low in degradation rate and high in cost, and the like.

The invention provides a method for preparing an aluminum phosphate molecular screen in a eutectic mixture, and belongs to the field of inorganic chemical synthesis. In particular, the invention relates to a method for an aluminum phosphate molecular screen by the eutectic mixture as a reaction solvent and a template. The method is characterized by using the eutectic mixture prepared by combining alcohol and quaternary ammonium salt as the reaction solvent and the template to prepare the aluminum phosphate molecular screen. In the ion thermal reaction, the eutectic mixture has proper acidity and alkaline, the alcohol organic matters are not decomposed to release extra organic amine in the crystallization reaction process when being heated, and the quaternary ammonium salt in the system can fully complete the structure guide action. Compared with the imidazole ionic liquid, the used eutectic mixture material has the advantages of low price, easy purchase and preparation, hard deliquescence and convenient use.

The invention discloses a soilless plant cultivation substrate and a preparation method thereof. The preparation method of the cultivation substrate disclosed by the invention comprises the following steps: firstly, uniformly mixing agricultural and forestry waste, water, a fermentation catalyst, a fermentation fungicide, bamboo vinegar and/or pyroligneous liquor to carry out fermentation treatment for the first time to prepare a first fermentation substrate; and then, adding the fermentation catalyst, the water, the bamboo vinegar and/or the pyroligneous liquor into the first fermentation substrate to carry out fermentation treatment for the second time to obtain the soilless plant cultivation substrate, wherein the fermentation catalyst comprises rhamnolipid. The plant cultivation substrate prepared by the preparation method disclosed by the invention is balanced in nutrition, high in nutritional ingredient content, reasonable in structure, stable in physical property and convenient for being absorbed by plants, satisfies plant growth needs, improves survival rate for plant cultivation and ornamental effect.

The invention discloses a method for preparing a soil-less culture substrate with agriculture and forestry organic waste material and the soil-less culture substrate. The method comprises the step of secondarily pyrolysing the agriculture and forestry organic waste material and collecting solid products to obtain the culture substrate, wherein the temperature of the secondary pyrolysis is higher than that of a first pyrolysis. The preparation method has simple technology, convenient operation, high product yield, can prepare the soil-less culture substrate with good permeability and good physiochemical performance index which reaches the requirement of the soil-less culture substrate, can provide good and stable substrate environment for plants, and is suitable for plant cultivation.

The invention relates to a tobacco floating seedling substrate and a preparation method thereof. The substrate contains 40-50% of turf, 10-20% of carbonized corn stalk granule, 10-20% of expanded perlite and 10-20% of vermiculite. The preparation method comprises the following steps of: crushing sun-dried corn stalks into rough granules; placing the rough granules in a carbonization furnace for high-temperature carbonization; crushing and screening after cooling; uniformly mixing with the turf, the expanded perlite and the vermiculite according to the raw material proportion; and carrying out sterilization. The corn stalks selected in the invention have the advantages of rich sources, low cost, various available nutrients and stable physical and chemical properties; by using the corn stalks to replace partial turf, the prepared substrate is loose, air-permeable, stable in structure, good in air permeability and water holding capacity, proper in pH value and large in cation exchange capacity, and has the effects of effectively ensuring the quality of floating seedling, bringing benefit to the sustainable development of the floating seedling substrate production, greatly reducing the seedling cost, solving the problem of insufficient sterilization, avoiding disease generation and having wide application prospect in tobacco floating seedling production.

The invention discloses a manufacturing method of modified meerschaum and relates to the field of environmental engineering. Natural meerschaum is subjected to acidizing so that micropore sizes are enlarged; a specific surface area is increased; and adsorption and degradation of heavy metals in acid mine waste water are promoted. The modified meerschaum can improve a SO4<2-> removal rate and has a low use amount so that energy saving is realized. A moderate intensity acidity or alkalinity is produced by the ion exchange modified meerschaum so that feeding water buffer and pH stabilization are promoted; growth conditions of sulfate reducting bacteria are satisfied; and product water pH stabilization is guaranteed. Surfactant-based treatment improves meerschaum dispersibility, promotes growth of sulfate reducting bacteria, accelerates decomposition of organics in acidic mine waste water, and improves acidic mine waste water treatment efficiency. After heating stirring, the product is separated and dried to form a superfine processed meerschaum product.

The invention provides flower nutrient solution. Main components of the flower nutrient solution consist of potassium nitrate, boric acid, calcium nitrate, manganese sulfate, calcium superphosphate, zinc sulfate, magnesium sulfate, copper sulfate, ferric sulfate and ammonium molybdate. The flower nutrient solution has moderate pH value and complete and balanced nutrient substances, and is favorable for absorption and utilization of plants. The flower nutrient solution can meet the nutrient requirements of flowers at each growing period so that leaves of the flowers are dark green, flowers are large and gorgeous, fruits are plump and bright, crowns are plentiful, and the flower nutrient solution can resist diseases and kill pests.

The invention discloses a method for preparing monofluoromethane by using a Pd-M alloy supported catalyst. The preparation method of the catalyst comprises the following steps: firstly, loading metalM nanoparticles on a carrier, then mixing and stirring a Pd precursor aqueous solution, preparing monodisperse Pd atoms on metal M through displacement reaction, and combining the Pd atoms with the Mmetal through roasting to form a Pd-M alloy to obtain the monodisperse Pd-M alloy supported catalyst, wherein the metal M can be Cu, Zn, Ni, Ru, Sn or Fe. Compared with single, double and multi-component non-alloy catalysts, the Pd-M alloy supported catalyst has higher selectivity to monofluoromethane (HFC-41) when used for catalyzing hydrogenation dechlorination of chloro-monofluoromethane to prepare monofluoromethane, can reach about 95%, is not prone to carbon deposition, and has longer service life (within 10% of activity reduction and within 5% of selectivity reduction within 1000h); andmoreover, the process route for preparing the monofluoromethane is simple, environment-friendly and safe.

The invention provides flower cultivation nutrient soil for an intelligent greenhouse. The nutrient soil comprises the raw materials of bagasse, bran, Juglans leaves, Mongolian oak leaves, a Chinaberry bark extract, pine needles, tea residues, volcanic ash, garden soil, sand, peat, animal waste, and fungi residues. The above components are reasonably formulated. The obtained nutrient soil has the characteristics of being clean and pollution-free, and having appropriate pH value, good soil structure, rich nutrients, good moisture maintaining and moisture storage capacity, and the like.

The invention provides a flower nutrient solution and a preparation method thereof. The flower nutrient solution mainly comprises the following ingredients: urea, monopotassium phosphate, calcium sulfate, magnesium sulfate, zinc sulfate, ferric sulfate, copper sulfate, manganese sulfate and boric acid powder. The flower nutrient solution has moderate pH value and comprehensive and balanced nutrients, is nontoxic, odorless and harmless to the people, and can meet the nutrient requirements of each growth period of the flowers in a year so that the leaves of the flowers are deep green, the flowers are big and have beautiful colors, the fruits are big and shiny, the crowns are full and the flowers are disease-resistant and insecticidal.

The invention discloses an emulsified cutting fluid and a preparation process thereof. The product comprises the following components in percentage by weight: 50-70% of base oil, 14-25% of a surfactant, 1-4% of an antirust agent, 0.2-1% of a preservative, 3-7% of a composite lubricant, 2-10% of organic alcohol amine, 2-3% of a bactericide, 2-4% of a hard water resisting agent, 0.1% of an anti-foaming agent and the balance of softened water. The raw materials are added according to a certain sequence and proportion and then stirred to obtain the emulsified cutting fluid. Compared with the traditional emulsified oil preparation process, no intermediates subjected to chemical reaction is needed to be added, and the production and preparation process is simple and easy to operate. The cuttingfluid provided by the invention has good lubricating property, and can be used for processing materials such as cast iron, steel, stainless steel, copper, copper alloy, magnesium alloy and the like.

The process of producing high efficiency nutritious matrix with water cabbage includes the steps of adding microbial strains and chemical decaying agent to water cabbage as the main material, high temperature aerobic composting, and mixing the compost with coconut bran and amendment to obtain the high efficiency nutritious matrix. The high efficiency nutritious matrix has moderate pH value, rich and comprehensive nutrients, high amino acid and trace element content, high water retaining property, high ventilating property and high remoistening property.

The invention discloses a method for regulating the flowering period of phalaenopsis tissue culture seedlings. The method comprises the following steps that 1, roots of the phalaenopsis seedlings arewrapped in sphagna, placed in a 1.5 L nutrient bowl and cultivated in a greenhouse until new roots grow out, and then fertilization is conducted; 2, when the roots are completely wound in sphagna, the1.5 L nutrient bowl is replaced with a 3.5-inch nutrient bowl, and 10 days after bowl replacement, fertilization is conducted once every 10 days; 3, an abscisic acid solution is adopted for wateringthe roots of phalaenopsis plants to promote dormancy of the phalaenopsis plants; 4, 120 days before expected marketing and selling, flower buds are induced, a GA3 solution and a KH2PO4 solution are adopted for watering the roots of the phalaenopsis plants in the early stage of flower bud induction, a compound fertilizer solution is adopted for watering the roots of the phalaenopsis plants in the later stage of the flower bud induction, and after natural illumination in this stage is completed, a combined LED red-blue light source is adopted for illuminating phalaenopsis; 5, in a flower bud differentiation period, a 6-BA solution is adopted for watering the roots of the phalaenopsis plants. The method is adopted for regulating the flowering period of the phalaenopsis tissue culture seedlings to obtain phalaenopsis which has a controllable flowering time and neater and brighter flowers.

A method of preparing a plant cultivation medium by utilizing agriculture and forestry waste and the prepared cultivation medium are disclosed. The method includes 1) spraying the agriculture and forestry waste with water to adjust the water content of the agriculture and forestry waste, and 2) adding a fermentation catalyst, a microbe agent and brown sugar into the agriculture and forestry waste, fully stirring and fermenting. The plant cultivation medium is balanced in nutrition, high in nutrient contents, reasonable in structure, stable in physical properties, and convenient for plant absorption, meets plant growth needs and increases the survival rate of plant cultivation and ornamental effects.

The invention discloses a soilless plant culturing medium and a preparation method thereof. The preparation method includes the steps of: uniformly mixing forestry and agricultural wastes, water, a fermentation conditioner, a fermentation inoculant, and bamboo vinegar liquid and/or wood vinegar liquid to perform primary fermentation to obtain a first fermentation substrate; adding the fermentation conditioner, water and the bamboo vinegar liquid and/or wood vinegar liquid to perform secondary fermentation. The fermentation conditioner includes [beta]-cyclodextrin, sawdust and bottom mud from fish pool. The plant culturing medium has balanced nutrients, is high in content of the nutrients, has reasonable structure and stable physical characters, is convenient to absorb by plants, satisfies demand of growth of plants, and improves survival rate and ornamental effect of plants.

The invention relates to a surface rust preventing treatment process for iron art products and provides a novel spraying line production technique. The surface rust preventing treatment process is characterized in that traditional phosphating is replaced by ceramic treatment on a spraying flow production line, common urban tap water is replaced by small cluster water with activity in each washing link during spraying, and common water base degreasing fluid is replaced by small cluster water base degreasing fluid. Compared with traditional phosphating, the method uses non-phosphorus ceramic treatment for pretreatment in prior to nano spaying, and accordingly adhesive force between coating and metal can be increased evidently, and corrosion-resistant time of metal can be prolonged.

The invention provides a new method for preparing theobromine by 3-methyl xanthine disodium salt methylation with more production value. The theobromine is prepared by using acetone as a solvent to react with dimethyl sulfate under the existence of sodium carbonate and then acidified. The invention uses the acetone as the solvent and decreases the hydrolysis loss of the dimethyl sulfate; the sodium carbonate provides an alkaline condition for the methylation reaction and the pH value is moderate. The dimethyl sulfate is dripped to carry out the methylation reaction with the advantages of good selectivity and a yield higher than other methylation technique by more than 10 percent. The acetone is recycled and reused; the reaction is relatively complete and has little caffeine by-product; the acquired analytic content of theobromine crude product HPLC is larger than 99 percent; therefore, the invention is extremely applicable to industrial production.