474results about How to "Wide variety of sources" patented technology

Method for preparing magnetic temperature-sensitive composite microsphere with nuclear shell structure by adopting in-situ grafting technique

The invention belongs to the technical field of medical engineering of polymer material and dust, in particular to a method for preparing magnetic temperature-sensitive composite microsphere with nuclear shell structure by adopting in-situ grafting technique. The preparation method comprises the following steps: carrying out surface modification to ferroferric oxide nano magnetic particles, leading the surface thereof to be carried with polymerisable double bonds, utilizing reversible addition-fragmentation chain transfer (RAFT) polymerization technique, carrying out in-situ grafting polymerization to N-isopropylacrylamide and hydrophilic allyl monomer on the surface of the magnetic particles to form a temperature-sensitive polymer, and obtaining the nuclear shell structure composite material with temperature-sensitive hydrophilic shell and controllable magnetothermal effect magnetic nuclear. The nuclear shell structure composite material has magnetothermal effect of ferroferric oxide, magnetic positioning capability and temperature responsiveness of the temperature-sensitive polymer simultaneously, and has wide application in fields of control release, immunoassay, memory element switches and sensors and the like. The synthesis method is simple and easy to operate, and the materials can be produced industrially, thus having good promotion and application values.

Once-applied efficient sustained-release composite base fertilizer

ActiveCN104030786AWide variety of sourcesimprove single fixation
The invention relates to the field of composite fertilizers, and concretely relates to a once-applied efficient sustained-release composite base fertilizer. The fertilizer is prepared from the following raw materials in parts by weight: 10-15 parts of 1250-2000 mesh diatomite, 15-18 parts of dry cattle manure, 8-10 parts of rice bran, 20-22 parts of urea, 15-18 parts of monoammonium phosphate, 8-10 parts of calcium superphosphate, 2-3 parts of vegetable gelatin, 1-3 parts of animal gelatin, 1-2 parts of basalt powder, 10-12 parts of potassium chloride, 6-8 parts of black soil, 1-2 parts of copper sulfate, 2-4 parts of zinc sulfate, 4-5 parts of pinus massoniana needles, 12-15 parts of pregelatinized cassava starch, 6-8 parts of polyvinyl alcohol, 4-5 parts of glycerol, 0.1-0.2 part of high-activity zinc oxide, 3-5 parts of magnesium sulfate, 1-2 parts of egg shells and 4-5 parts of an auxiliary agent. The composite fertilizer is wide in raw material sources, low in cost and sufficient in fertility; dual cladding on nutrients is formed by utilizing an efficient sustained-release coating agent prepared from diatomite and multiple film easily-forming raw materials in the preparation technology, so that the fertility is relatively durable, and noneffective loss of nutrients is avoided; and the composite fertilizer is capable of satisfying growth requirements of crops after being applied once, and helps to greatly simplify plantation cost.

Pleurotus eryngii culture medium and culture method thereof

The invention relates to a pleurotus eryngii culture medium and a pleurotus eryngii culture method. The culture medium is prepared by the following steps of: a, mixing 72 to 79 mass percent of miscanthus floridulus which is cut into particles with diameters of 1 to 2 cm, 17 to 22 mass percent of bran, 2 to 4 mass percent of white sugar, 0.9 to 1.1 mass percent of gypsum powder and 0.9 to 1.1 masspercent of lime; and b, uniformly stirring the components in the step a, and adding water to prepare the culture medium with the water content of 65 to 75 percent and the pH of 7.5 to 8. The pleurotus eryngii culture method comprises the following steps of: preparing the culture medium, placing the culture medium with the water content of 65 to 75 percent into a culture bottle and sealing the culture bottle for sterilization; opening sealing paper and implanting strains into the culture medium in the culture bottle with an inoculating tool; and performing inducement to primordium and fruitingmanagement. The pleurotus eryngii culture medium and the pleurotus eryngii culture method have the advantages that: produced pleurotus eryngii is large and delicious, and has high yield; the culture method is simple; as the miscanthus floridulus is adopted as the main raw material of the culture medium and has a wide source and low cost, the production cost of the pleurotus eryngii is lower; and a production environment is clean and has no off-odor, so workers can work in the sanitary and clean environment.

Chitosan-based porous carbon sphere and preparation method thereof

The invention discloses a chitosan-based porous carbon sphere and a preparation method thereof. The preparation method disclosed by the invention comprises the following steps: taking chitosan as a carbon precursor and a diluted hydrochloric acid solution as a solvent; carrying out low-temperature hydrothermal carbonization to obtain a chitosan-based carbon sphere; then taking alkaline melted saltKOH as a pore-forming agent and carrying out high-temperature carbonization activation under a nitrogen gas atmosphere; carrying out acid washing; washing with water until a product is neutral; carrying out freeze drying to obtain the chitosan-based porous carbon sphere. According to the chitosan-based porous carbon sphere, an adopted carbonization raw material is wide and low in cost, is safe and has no toxicity and can be regenerated; the preparation method has the advantages of relatively low reaction temperature, simplicity in operation, energy saving and environment protection; the prepared chitosan-based porous carbon sphere has a relatively high specific surface area (the specific surface area is 2400 to 3500 m<2>/g), abundant three-dimensional porous structures (a pore channel comprises a micro-pore and a mesopore and the pore diameter is 0.5 to 2.5 nm), good stability and high adsorption performance, can be used as an efficient adsorbent and an electrode material and is applied to the fields of sewage treatment and super-capacitors.
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