11 results about "Protective Agents" patented technology

The invention discloses a preparation method of an oxide nanocrystal solid. According to the method of the invention, a soluble high valence metal cation is hydrolyzed, while a metal oxide anion is not hydrolyzed but taken as a protective agent to form a metal oxide nanocrystal, and then self-assembly is performed to form a three-dimensional nanocrystal solid with nanocrystal particles in ordered arrangement. The preparation method of the oxide nanocrystal solid of the invention is an inexpensive, simplified, non-toxic and pollution-free method, which hydrolyzes the metal cation into oxide nanoparticles that are then assembled into a novel photoelectric material with a three-dimensional ordered structure. As the method of the invention employs pure inorganic substances for reaction, the product has substantially improved electroconductive performance, and a special photoelectric performance is generated.

The invention provides a process for extracting gama-interferon from pichia pastoris fermentation liquor. The process comprises the steps of putting in a tank, centrifuging, membrane separating, shaping, and spray drying. The shaping step is characterized by adding excipient and a protective agent into the fermentation liquor. The excipient is any one of trehalose, starch, mannitol and maltodextrin; the concentration of the excipient is 5 to 20 percent. The protective agent is any one of soya bean lecithin, lysine, hydroxypropyl methyl cellulose and polyethylene glycol 20000; the concentration of the protective agent is 1 to 8 percent. The method provided by the invention is adopted for extracting the gama-interferon from the pichia pastoris fermentation liquor, and the activity of the gama-interferon can reach 3.23 * 106 to 4.29 * 106 IU/ml.

The invention discloses a water-based wood protective agent. The water-based wood protective agent comprises methyltrimethoxysilane, hexadecyltriethoxysilane, ammonium hydroxide, benzalkonium bromide,alkaline silica sol, alkylphenol ethoxylates, sodium dodecyl benzene sulfonate and deionized water. A protective agent preparation method comprises the steps that (1) the methyltrimethoxysilane is added into the deionized water; (2) the sodium dodecyl benzene sulfonate is added; (3) the ammonium hydroxide is added; (4) hexadecyltriethoxysilane is added; (5) the alkaline silica sol is added into the deionized water; (6) the alkylphenol ethoxylates is added; (7) the benzalkonium bromide is slowly added into a solution obtained in the step (6); and (8) a solution obtained in the step (7) and a solution obtained in the step (4) are mixed and stirred. After wood is processed through the water-based wood protective agent, a compact breathing hydrophobic membrane is formed on the surface of wood, the wood is clear in texture, and the natural color of the wood is maintained. The water-based wood protective agent has the advantages of being non-poisonous, tasteless, transparent, resistant to water, mould, bacteria and ageing, simple in technology, low in cost and the like.

The invention relates to the field of medical checkup quality control, and concretely relates to a liquid composite protective agent for long-term culture preservation, and a preparation method and an application method thereof. The liquid composite protective agent for long-term culture preservation is prepared from the following components according to 100mL of solution agent: 15 to 20mL of ethylene glycol, 10 to 15mL of glycerinum, 0.5 to 1g of nutrient bouillon, 0.3 to 0.8g of trehalose, 0.1 to 0.5g of brain infusion powder, and the balance distilled water. The liquid composite protective agent for long-term culture preservation provided by the invention has good protection on various bacteria cultures, can ensure the activity of the cultures at the temperature being minus 20 DEG C and below after being mixed with the cultures, cannot affect the biochemical characters of microorganisms, has no need to be freeze-dried, redissolved and preserved in dark, and is convenient to use and operate in clinic bacterial detection. The cultures protected by the liquid composite protective agent provided by the invention can stably survive for more than 1 year at the temperature being minus 20 DEG C, and stably survive for more than 10 years at the temperature being minus 70 DEG C, so that great convenience is provided for the long-term preservation of special cultures.

The invention discloses a device for rapid dehydration and fixing of a biological molecule detection sample and a use method thereof. Main parts of the device are as follows: a cylindrical bottle body with a diameter of 25-60 mm and a height of 35-75 mm and a round wire mouth bottle cap, a sample storage container is arranged in the bottle body or the bottle cap, a filter paper, cavernous body and biological molecule protectant is put in the sample storage container, an additive bag containing a desiccant, porous sponge foam and a deoxidizer is placed at the bottom of the bottle body, an isolation device is arranged between the additive bag and the sample storage container for preventing the additives from polluting the sample, and the isolation device is provided with multiple air holes convenient for the additive bag to play effects of drying, deoxidization, and the like. The device can fast dry the biological sample and preserve the biological sample for a long term, and has very broad application prospects.

The invention provides a small cake containing tomatoes and frozen bean curds. The small cake is prepared from weak strength flour of wheat, tremella powder, walnut oil, tomatoes, frozen bean curds, eggs, salt, stevioside, fish gelatin, star anise, fennel seeds, cinnamon, black pepper, nutmeg, twolobed officinal magnolia bark, cumin, rhizoma kaempferiae, black cardamon, hot pepper, galangal, rhizoma atractylodis macrocephalae, lactic acid bacteria, yeast and lysozyme. The small cake containing tomatoes and frozen bean curds is low-fat and low-sugar, is suitable for scale production, and has the advantages of having intense fragrance, being slightly sour, tasty and refreshing, having a moderate salinity, being golden yellow in color, being mellow and delicious, being nutritionally balanced and being easy to digest; tomatoes, frozen bean curds, spices and vegetable oil are mixed, so that the nutrients are well-balanced; after being baked at high temperature for a short time, the small cake has intense, harmonious and lasting fragrance, is crispy outside and tender inside, and is high in nutrient content; the surface of the small cake is provided with lysozyme as a protective agent, so that the effects of bacterium resistance and disinfection are achieved and the shelf life is prolonged; the small cake contains no cane sugar and additives and contains walnut oil, and thus is nutritional, safe and healthful and can be eaten by any population in quantity.

The invention relates to the technical field of medicine preparation, and particularly relates to compound amoxicillin soluble powder and a preparation method thereof. The compound amoxicillin soluble powder provided by the invention is prepared from the following ingredients including amoxicillin trihydrate, clavulanate potassium, surfactants, pH regulators, protection agents and filling agents. The amoxicillin soluble powder provided by the invention has the advantages that the solubility in water is high; the degradation cannot easily occur; and the clinic medicine effect exertion is favorably improved. The preparation method provided by the invention has the advantages that the steps are simple; the operation is easy; and the industrial production can be easily performed.

The invention belongs to the technical field of compound preparation. The invention relates to a preparation method of phosphatidylglycerol monosodium salt, in particular to a preparation method of phosphatidylglycerol monosodium salt containing two different side chains. The preparation method comprises the following steps: taking D-mannitol as an initial raw material, heating D-mannitol in acetone to generate 1,1,5,6-isopropylidene-D-mannitol; carrying out sodium periodate oxidation and sodium borohydride reduction to obtain iso-propylidene glycerol; carrying out condensation reaction with fatty acid containing an R1 element, then removing acetal protective groups in the presence of acid; selectively protecting primary hydroxyl by using a silane protective agent, reacting secondary hydroxyl with another fatty acid containing a R2 element, removing silane protection, reacting the de-protected product with phosphorus oxychloride and iso-propylidene glycerol, removing acetal protectivegroups by using an acid, and finally carrying out a sodium salt treatment to obtain a final product. The synthesis of phosphatidyl monosodium salt containing two different side chains can be realized,and the production process is simple, environment-friendly and easy to operate.

The invention discloses an industrial salt snow melting agent additive and a using method thereof. The additive comprises the following components in parts by weight: 10 to 50 parts by weight of a concrete protective agent; 10 to 30 parts by weight of a corrosion inhibitor; 3 to 5 parts by weight of a plant protection agent and 1 to 10 parts by weight of a soil anticaking agent. Through the technical scheme, the performance of each component of the additive is not affected, and reduction of the harm effect of an industrial salt snow melting agent on road steel facilities, plants, cement concrete and soil is comprehensively considered, so that the environmental protection performance of the industrial salt snow melting agent is obviously improved.