58results about How to "Has a clearing effect" patented technology

The invention provides a preparation method of a plant unbleached impregnated specimen. In the invention, the fixative of the operation process adopts a composite biocidal formula and simplifies the fixing and biocidal procedures, and the operation is simple; and the preservation solution for preserving the plant specimens adopts nontoxic and inexpensive biological extracts, such as garlic extract, ginger extract, carboxylation chitosan and the like, and solves the problem of environmental pollution when preserving and storing the plant specimens. The preparation method of invention can be applied to the impregnation and preservation of monochromatic plants, such as green, yellow, red, white plants and the like, multi-color plants and whole plant specimen, and provides a novel way for preparing the plant unbleached impregnated specimens.

The invention relates to a blood purification adsorbent with an embedding material and a preparation method of the blood purification adsorbent. The embedding material comprises zwitterionic monomer, a cross-linking agent, an initiator and a solvent, and the zwitterionic monomer comprises one or two types of zwitterionic molecules of carboxyl betaine, sulfobetaine and phosphorylcholine. The method includes: mixing the zwitterionic monomer, the cross-linking agent, the initiator and the solvent; adding activated carbon or resin to form mixed solution, wherein the mass of added activated carbon or resin is 6%-50% of that of the zwitterionic monomer; subjecting the mixed solution with activated carbon or resin to ultraviolet radiation or heating or normal-temperature standing to enable curing of the monomer on the surface of the adsorbent through cross-linking polymerization to form the adsorbent with the zwitterionic embedding material. The embedding material is excellent in protein adsorption resistance and biocompatibility and is extremely high in toxin diffusion efficiency in application to blood adsorption. The blood purification adsorbent is easy to store, and the preparation method is simple and feasible.

The invention provides a method for preparing high purity rhNGF from CHO cell culture, which combines cation- exchange chromatography and hydrophobic interaction chromatography. The method is characterized in that a cleaning step is added before chromatography by the two methods. Experiments prove that by the purification method, rhNGF precursor molecular variants can be removed, the content of N-terminal truncated and abnormal variants in purified products can be greatly reduced. The product has high purity and can meet the requirement of clinical application.

The invention discloses a preparation method of electronic package mould cleaning rubber. The preparation method comprises the following steps: firstly, adding a synthetic rubber composition into a rubber mixing mill for plastification; secondly, fully mixing a stabilizer, a scorch retarder, a cleaner, a filler composition and a solvent in a high-speed mixer to obtain a mixture, and mixing the mixture and plasticated rubber obtained in the first step in an internal mixer; thirdly, fully mixing a vulcanizer, an accelerant, the filler composition and the solvent in the high-speed mixer to obtain a mixture, and mixing the mixture with a rubber compound obtained in the second step for the second time; fourthly, thinning a rubber compound obtained in the third step for 5-6 times, tabletting, cutting according to the specified size, and plastically packaging. The preparation method has the advantages of being easy to operate and pollution-free; the cleaning rubber cannot corrode a mould, is low in preparation cost and good in cleaning performance, and can be stored at normal temperature.

The invention discloses a formaldehyde decomposition liquid which comprises the following raw materials in parts by weight: 5-30 parts of sodium phytate, 2-15 parts of activated carbon, 2-20 parts of sodium sulfanilate, 0.2-5 parts of titanium dioxide, 1-15 parts of glucoside, 0.5-8 parts of ethylenediamine tetraacetic acid, 0.5-5 parts of ethyl acetate, 0.5-12 parts of dicyandiamide, 1-15 parts of carbohydrazide, 1-15 parts of sodium thiosulfate, 1-15 parts of glycerol and 50-120 parts of distilled water. A preparation method comprises the following steps: mixing the distilled water with titanium dioxide and the activated carbon, stirring, heating, adding other raw materials, performing heating and heat preservation, cooling to the room temperature, and filtering, thereby obtaining the formaldehyde decomposition liquid. Under mutual action of the raw materials, the formaldehyde decomposition liquid disclosed by the invention has a decomposition function on harmful organic matters such as formaldehyde and ammonia gases, further has a cleaning effect on cigarette smell, toilet smell, garbage smell, animal smell and the like, has functions of sterilization and purification, and is capable of effectively removing indoor environment pollution.

The invention discloses a method for preparing a food preservative by using sand ginger oil extraction waste liquid. The method comprises the following steps: taking aqueous distillate flowing out of an oil-water separator of a sand ginger oil extraction tank or aqueous distillate collected after redistilling brown-yellow turbid waste liquid in the extraction tank, and separating out a mixture of trans-ethyl p-methoxycinnamate and cis-ethyl p-methoxycinnamate in the aqueous distillate by adding sodium chloride or potassium chloride; adding an organic solvent for extraction, and distilling the organic solvent under reduced pressure to obtain brown-yellow oily liquid; freezing the brown-yellow oily liquid; separating out and crystallizing; and rapidly filtering to obtain a mixture of trans-ethyl p-methoxycinnamate and cis-ethyl p-methoxycinnamate. The mixture has antibacterial activity on aspergillus niger, aspergillus flavus and penicillium citrinum, has a scavenging effect on DPPH.free radical and ABTS+.free radicals, has suitable fragrance and can serve as the food preservative. The method is simple to operate, environment-friendly, low in cost and convenient to popularize and use.

The invention discloses an antioxidative composition and application thereof. The antioxidative composition comprises, by weight, 8.4-25.2 parts of propolis, 0.2-0.8 parts of lycopene, 0.2-0.5 parts of lutein and 0.1-6.5 parts of vitamin E. The propolis, the lycopene, the lutein and the vitamin E are different in antioxidative principle, can act jointly and comprehensive, are higher in synergistic effect and are used together to achieve the antioxidative effect jointly.

The invention relates to the technical field of application of EGCG quinone, and particularly relates to application of EGCG quinone as an inhibitor for resisting release of AGEs in the gastrointestinal tract. The EGCG quinone has the activity of resisting release of the AGEs in the gastrointestinal tract. The EGCG quinone is specifically capable of effectively inhibiting release of the AGEs in the gastrointestinal tract, and comprises a representative CML of fluorescent AGEs and non-fluorescent AGEs. The related mechanism comprises interaction between the EGCG quinone and glycosylated protein and digestive enzyme, and is capable of inhibiting the activity of the digestive enzyme and changing the conformation of the glycosylated protein. In addition, the EGCG quinone also has a considerable scavenging effect on the released AGEs. Therefore, the EGCG quinone has the potential to serve as the inhibitor for resisting release of the AGEs in the gastrointestinal tract, can serve as a functional food additive, is used for developing functional food for resisting release of the AGEs in the gastrointestinal tract, and has great market application value.

The invention belongs to the field of articles for daily life and in particular relates to a hand sanitizer. The hand sanitizer is prepared by taking sodium alginate as a film forming base material and chitosan as a raw material of a blended film; a molecular chain of the chitosan has primary amino and a molecular chain of the sodium alginate has carboxyl; under the action of an electrostatic force, a polyelectrolyte film can be formed through positive and negative charge attraction, so that one layer of protection film is formed on skin; by a low molecular weight plasticizer glycerol, a plasticizer molecule and a polymer have a mutual effect, so that a mutual action force between macromolecules is weakened and the hydrogen-bond interaction in the molecules is weakened; the ratio of a crystallization region to an amorphous region of the film is reduced and the water seepage steam penetration rate of the film is improved, so that the loss of moisture in the skin is prevented or alleviated and the wetting property of the skin is kept; rosemary essential oil is added and essential oil molecules exist in the film with a plurality of micro-pores; after active substances with a bacterium-inhibition effect in the essential oil molecules enter the film, the active substances are dispersed to the surface of the film gradually through the micro-pores, so that the antibacterial performance of the surface of the skin is improved.

The invention provides an antiscale agent for a brine transportation pipeline. The antiscale agent is prepared from starch phosphate, sodium lignin sulfonate, gluconic acid-malic acid-sodium pyrophosphate telomere and purified water according to a certain proportion. When the antiscale agent is used by three domestic salt plants, it is proved that undissolved salt crystals can be effectively prevented from being produced by high-concentration Ca2+ and Mg2+ in original brine after the antiscale agent is added to the original brine conveyed by the pipeline, and therefore it is avoided that when scales are produced by Ca2+ and Mg2+ in the pipeline for conveying the original brine, brine is not smoothly conveyed by the pipeline, the brine conveying resistance is eliminated, the brine mobility is improved, the brine conveying efficiency is effectively improved, and energy consumption is lowered; after long-term use, the agent has a certain effect on cleaning away existing scales. Meanwhile, non-toxic and harmless food additives are selected as the raw material, the residual antiscale agent in finished salt only accounts for one thousandth of the permissible dose in food, and human health is not influenced after the antiscale agent is eaten.

A synergistic method for metamorphism and microalloying of a hypoeutectic casting Al-Si alloy comprises: melting the hypoeutectic casting Al-Si alloy, adding a refining agent thereto for degassing and slag removal, adding rare earth elemental La, settling and maintaining at a certain temperature, further adding elemental Mg, settling and maintaining at a certain temperature, and finally casting at a certain temperature. By means of the metamorphizing action of La and Mg and the mutual promotion of metamorphism of these two elements, favorable metamorphism of the Al-Si alloy can be achieved. At the same time, La and Mg as microalloying elements can strengthen the Al-Si alloy, improving alloy performance. In addition, for an Al alloy melt, the method includes dehydrogenation and degassing, reducing oxide inclusion, and purifying the melt, thereby improving the alloy structure and enhancing the mechanical performance thereof.

The invention discloses a preparation method of plant polyprenol with bacteriostatic and antioxidant activity and a hydrogenated derivative thereof, which comprises the following steps of: taking gingko, pine needles and folium mori as raw materials, extracting a polyprenol lipid ointment through a non-polar solvent, including with a filler in urea alcohol solution, crystallizing, preparing a polyprenol type lipid urea inclusion compound and purifying polyprenol lipid through column chromatography; adding into 5-40 percent by weight of caustic soda solution for saponification reaction and preparing more than 95 percent by weight of polyprenol; adding a catalyst in methylene dichloride-methanol solution and ensuring that the mass ratio of the polyprenol to the catalyst is 80-200:1, the reaction pressure is 8-20 MPa, the reaction time is 18-48 hours, and the reaction temperature is 10-50 DEG C; and after reaction, filtering and concentrating under vacuum, wherein a concentrate is a polyprenol hydrogenated derivative. The polyprenol and the hydrogenated derivative thereof prepared by the method play roles in restraining staphylococcus aureus (Sa.), escherichia coli (Ec.), bacillus subtilis and salmonella and clearing superoxide free radicals and hydroxyl free radicals.