34results about How to "Degradation has" patented technology

The invention discloses a device for evaluating the automobile exhaust degradation effect of an OGFC mixture. The device comprises a closed container, an automobile engine, an automobile exhaust analyzer, a track board test piece, and air supplying devices, wherein the air supplying devices are arranged in the closed container. The invention further discloses an evaluation method which comprises the following steps in sequence: preparing the track board test piece, and generating automobile exhaust; simulating the degradation of automobile exhaust on a pavement and testing the concentration of each gas in the automobile exhaust; processing data. The track board test piece is prepared from the OGFC mixture which is added with a photocatalytic material; the evaluation index, used for evaluating the automobile exhaust degradation effect, of the OGFC mixture is taken as the degradation rate. The evaluation device can simulate the automobile exhaust degradation processes of the OGFC mixture in different illumination conditions by controlling the number of ultraviolet lamp tubes. The evaluation method is accurate and reliable, and coincides with the automobile exhaust degradation situation on a real pavement.

The invention discloses a method for preparing edible salt added with bamboo ingredients. The method comprises the following steps: drying commercial salt, adding a certain amount of a bamboo flavones extract prepared by processing bamboo powder, a bamboo beverage, bamboo juice and a water extracting solution or a concentrated solution of bamboo leaves into the salt, uniformly mixing, adding a certain amount of a flavor enhancer, namely 5'-disodium guanylate as well as dextrin and seasonings, finally adding a proper amount of an anti-caking agent into mixed salt, and performing subsequent operations of adding iodine, weighing, packaging and the like according to the needs. The method is simple in process and low in cost, and meets laws and regulations on food safety and related provisions in an ISO9000 quality management system; the produced bamboo-containing edible salt can be used for reducing intake of people on sodium chloride while ensuring a seasoning function; the added bamboos contain various chemical ingredients beneficial to a human body.

The invention relates to a flexible absorbable composite interface screw sheath and a preparation method thereof. The flexible absorbable composite interface screw sheath is prepared by melt blendingand extrusion granulation of the mixture and injection molding, wherein the mixture mainly comprises a base material and polyethylene glycol, or mainly consists of a matrix material, a polyethylene glycol-flexible polylactone copolymer and beta-TCP, wherein the matrix material is polylactic acid and/or a copolymer thereof, and the flexible polylactone is a polymer of caprolactone and/or valerolactone; the flexible absorbable composite interface screw sheath has elongation at break of not less than 103%, the impact strength of not less than 10 kJ/m<2> and the breaking strength of not less than25 MPa. By adopting the method, the ductility, strength and impact toughness of the absorbable composite interface screw sheath are improved, and the prepared absorbable composite interface screw sheath has high elongation at break, high impact strength and high enough breaking strength, and has good application prospect.

The invention belongs to the field of functional fiber materials, and discloses a traditional Chinese medicine composite antiviral multifunctional degradable polylactic acid fiber and a preparation method thereof. The preparation method comprises the following steps of fermenting a starch fermentation raw material to extract lactic acid, performing dehydration condensation to obtain a lactic acid prepolymer, adding the lactic acid prepolymer, functional nanoparticles and a catalyst into an extruder, performing melt mixing polycondensation to obtain functional polylactic acid, and performing spinning molding to obtain a product. The functional nanoparticles are obtained by adsorbing traditional Chinese medicine antiviral components by an inorganic nano powder material subjected to surface modification by porous silicon dioxide and a silane coupling agent. Functional modification of the polylactic acid fiber and upstream fiber polymerization are effectively coupled, so that the process steps are remarkably simplified, the production energy consumption is reduced, and better mixing and dispersing effects and stability are achieved. Meanwhile, an inorganic antibacterial health-care function and a traditional Chinese medicine antiviral function are integrated into the same particle, so that the antibacterial, antiviral and health-care functions can be played at the same time. The obtained functional fiber has the advantages of environmental protection, degradability and cyclic regeneration.

The invention discloses a nano-silicon dioxide modified environment-friendly waterborne paint remover and a preparation method thereof. The nano-silicon dioxide modified environment-friendly waterborne paint remover is prepared from the following raw materials in parts by weight: 1.2-1.4 parts of nanometer montmorillonite, 1.5-2 parts of a penetrating agent T, 42-46 parts of benzyl alcohol, 11-12 parts of acetone, 10-11 parts of hydrogen peroxide, 3-3.5 parts of methylcellulose, 2-2.4 parts of urotropine, 1.3-1.5 parts of dodecylbenzenesulfonic acid, 1.6-1.9 parts of microporous starch, 2.2-2.5 parts of microcrystalline wax, 0.8-1 part of tetrabutyl titanate, a proper amount of ammonia water, a proper amount of ethyl alcohol, 50-55 parts of water, 1.2-1.5 parts of boronic acid, 0.4-0.6 part of sodium dichloro isocyanurate and 0.9-1.3 parts of nano-silicon dioxide. With using of the boronic acid and the sodium dichloro isocyanurate, the nano-silicon dioxide modified environment-friendly waterborne paint remover has the bacterium resistance and the corrosion resistance, is good in permeability and promotes peeling of a paint film; and by using the nano-silicon dioxide, peeling is formed at an interface, the peeling speed is increased, secondary pollution is prevented, and metal corrosion is retarded.

The present invention discloses phytoagglutinin modified lactic acid-hydroxyacetic acid copolymer with specific adhesion to prolong the retention time or preparation in gastrointestinal tract obviously and raise the bioavailability of orally taken medicine greatly. The polymer consists of biodegradable material lactic acid-hydroxyacetic acid copolymer and bioadhesive material phytoagglutinin. The phytoagglutinin modified lactic acid-hydroxyacetic acid copolymer is prepared through dissolving lactic acid-hydroxyacetic acid copolymer, 1-ethyl-3-carbodimide and N-hydroxy succinimide in non-proton type polar solvent, and reaction at room temperature via stirring for 2-12 hr; adding water, filtering and collecting precipitate to obtain PLGA-NHS; dissolving phytoagglutinin and PLGA-NHS in mixed solvent of water and non-proton type polar solvent, filtering the reacted mixture, taking the dialysate, and freeze drying to obtain the phytoagglutinin modified lactic acid-hydroxyacetic acid copolymer.

The invention discloses a degradable high-molecular agricultural mulching film. According to the agricultural mulching film, lignin and polymer resin serve as raw materials, a plasticizer and fertilizer are added for compounding, and single-screw extrusion and film blowing are carried out so as to obtain the agricultural mulching film. The agricultural mulching film can be slowly degraded in soil,meanwhile, the fertilizer can be released, and in addition, the slow controlled-release effect of the fertilizer is achieved. The agricultural mulching film has the advantages that the soil pollutioncan be reduced, the soil nutrient content can be conveniently increased, a preparation process is simple, the raw materials are easy to obtain, and a good industrial application prospect is achieved.

The invention discloses a pH-sensitive biodegradable polyurethane-urea material and a preparation method thereof. The polyurethane-urea is pH-sensitive biodegradable polyurethane-urea prepared by mixing dihydroxy-terminal polyether ester with N,N-bis(2-ethoxy) 4-pyridinccarbox amide, carrying out chain expansion by using carbamido-containing diisocyanate and purifying; the polyether ester is usedas a main soft segment, a chain segment containing carbamido and urethane group is used as a hard segment and a pyridine ring is positioned on a side chain. The polyurethane-urea has the characteristics of biodegradability, absorbability of a degradation product, pH sensitivity, high expanding and degrading rate in acidic mediums, as well as basically no expansion and low degrading rate in neutraland alkaline mediums; in addition, the pH sensitivity is not basically affected by temperature and can be applied to the field of controlled release as a drug carrier, and further the drug release rate is controlled according to pH values of different parts of an organism. The hard segment formed by carbamido-containing structure diisocyanate contains dense hydrogen bonds, so that the mechanicalproperty of the material is improved.

The present invention discloses senescence delaying blueberry buccal tablets. The blueberry buccal tablets consist of the following raw materials in parts by weight: 300-315 parts of blueberries, 60-62 parts of rosa roxburghii fruit juice, 45-46 parts of papayas, 40-42 parts of germinated brown rice, 18-20 parts of green tea powder, 30-32 parts of raspberries, 14-15 parts of banana powder, 23-24 parts of whole wheat flour, 7-8 parts of avocados, 12-13 parts of red date juice, 1-2 parts of pine pollens, and an appropriate amount of water. The beneficial effects are as follows: the blueberry buccal tablets are prepared from the blueberries, rosa roxburghii fruit juice, germinated brown rice and edible materials as the main raw materials, and rich in health-care ingredients of anthocyanins, flavonoids, vitamins, etc., have effects of preventing oxidation, moisturizing skins, delaying senescence, protecting the health of heart and cerebral vessels, reducing cholesterol accumulations, lowering blood lipids and blood glucose, etc., and are beneficial for body health.

The invention relates to a high-barrier degradable film, which belongs to the technical field of film preparation. The high-barrier degradable film is obtained by coating a film substrate in a PVA coating liquid and drying. The PVA coating liquid is prepared by the following steps of 1, preparing the following raw materials in parts by weight: 30-60 parts of polyvinyl alcohol, 10-15 parts of absolute ethyl alcohol, 5-10 parts of deionized water, 3-5 parts of modified hexagonal boron nitride, 3-5 parts of modified nano cellulose, 2-3 parts of boric acid and 0.3 part of an antibacterial agent, and 2, sequentially adding all the raw materials into a reaction kettle, and evenly stirring and mixing,. Modified hexagonal boron nitride has high barrier performance, heat resistance and ultraviolet absorption performance, nanofibers are grafted with an intermediate b containing a hindered phenol structure through a chemical grafting method, and modified nanocellulose is obtained; the film prepared by the invention has a toughening effect and also has an anti-oxidation effect, so that the film prepared by the invention has the properties of high barrier, degradability, oxidation resistance and ultraviolet resistance.

The invention discloses providencia alcalifaciens and application thereof in degrading tetracycline and generating phytohormone. The providencia alcalifaciens is named as Providencia alcalifaciens TC1, the preservation number is GDMCC NO:60787, and the strain is preserved in the Guangdong Microbiological Culture Collection Center on Floor 5, Building 59, No.100 Courtyard, Middle Xianlie Road, Guangzhou on September 25, 2019. The Providencia alcalifaciens TC1 disclosed by the invention is capable of degrading tetracycline in a co-metabolism mode and secreting auxin or analogs, therefore, the Providencia alcalifaciens TC1 can be applied to degradation of medium/low-concentration tetracycline in soil and water bodies to remove or reduce residues of tetracycline in the environment, and can bealso used to generate phytohormone to promote growth of plants.

The invention provides a separation and screening method of a trichlorphon degradation strain. The method comprises the following operation steps of (1) soil collection; (2) culture medium preparation; (3) enriched domestication on the trichlorphon degradation strain by a gradient domestication method; (4) trichlorphon degradation strain separation and identification; (5) study on degradation characteristics of the strain on trichlorphon so as to analyze the biological restoration potential of the strain on the trichlorphon polluted soil. The strain screened by the method is obtained by separating in an inorganic salt solid culture medium using the trichlorphon as a unique carbon source; meanwhile, the method can be used for screening other organophosphorus pesticide degrading bacteria; the obtained strain is a soil native microorganism, belongs to a novel strain capable of degrading trichlorphon, and can be applied to the biological restoration of trichlorphon polluted soil. A gas chromatography-mass spectrometry method is used for testing the degradation effect of the strain on the trichlorphon; the operation is simple; the accuracy is high.

The invention belongs to the technical field of underground water remediation, and particularly relates to an organic polluted underground water in-situ remediation system, which is composed of an ozone generation and mixing system, an ozone injection well and an ozone ejector. The ozone generation and mixing system is composed of a compressed air preparation device, an ozone preparation device and an ozone concentration adjusting device; the compressed air preparation device consists of an air compressor, a refrigeration dryer and a dry compressed air storage tank; after the air compressor compresses the air, the temperature of the air rises, and meanwhile moisture in the air is separated out in a supersaturated mode; the saturated compressed air is frozen, cooled and dewatered by the refrigeration dryer to become dry compressed air with the pressure of 0.6-0.8 MPa and the dew point lower than 20 DEG C, and the dry compressed air enters the compressed air storage tank to be stored; ozone is in contact with organic matters in underground water to generate oxidation reaction, so that the purpose of degrading the organic matters is achieved, and the technical effect of degrading the organic matters is achieved.

The invention discloses a degradable sanitation brush wire and a preparation method thereof. The brush wire is prepared from, by weight, 80-100 parts of a base plastic material, 40-50 parts of an auxiliary material, 15-20 parts of an additive, 15-20 parts of a wear-resistant agent and 5-10 parts of an antibacterial agent. The preparation method comprises the steps that the base plastic material and the auxiliary material are mixed firstly, then the additive, the wear-resistant agent and the antibacterial agent are added, mixing continues, the mixed material is extruded through an extruder andpulled and drawn through a puller, and finally through shape setting and cutting, the finished product brush wire is obtained. The degradable sanitation brush wire is made of the degradable base plastic material, and in cooperation with the plant auxiliary material, the prepared finished product brush wire is free of toxic and harmful effects and has the characteristic of being easy to degrade. Inthe preparation process, by further adding the additive, the wear-resistant agent and the antibacterial agent, the degradable sanitation brush wire has the characteristics of being resistant to wearand bacteria and long in service life, and during use, the degradable sanitation brush wire cannot carry germs.

The invention provides a method for screening phenanthrene polycyclic aromatic hydrocarbon degrading bacteria. The method for the screening phenanthrene polycyclic aromatic hydrocarbon degrading bacteria mainly comprises the following steps of culturing petroleum-polluted soil in an LB liquid culture medium containing crystal violet, diluting according to a concentration gradient, coating on an LB plate containing the crystal violet, inversely culturing, selecting a colorless circle single colony, inoculating into a liquid LB test tube, culturing, and calculating the decolorization rate, and continuously screening strains with the crystal violet decolorization rate of more than 80% to enable the strains with the phenanthrene degradation rate of more than 45% to be the phenanthrene polycyclic aromatic hydrocarbon degrading bacteria. According to the method for the screening phenanthrene polycyclic aromatic hydrocarbon degrading bacteria, the crystal violet is utilized, the dye is a common triphenylmethane dye; when an observed sample can be converted into light purple from purple and finally colorless, the bacteria can degrade the crystal violet and has the effect of degrading polycyclic aromatic hydrocarbon, and the bacteria capable of efficiently degrading the crystal violet and obtained through the screening method can degrade the polycyclic aromatic hydrocarbon at the same time.

The invention relates to a process for deodorizing household garbage, increasing methane yield and accelerating garbage degradation, which comprises the following steps: step 1, mixing a microbial agent and molasses in proportion, culturing and expanding to form expanding liquid; step 2, uniformly mixing the hair expanding liquid and the ultrafiltration water according to a certain volume ratio to prepare a mixed liquid A; uniformly mixing the expansion liquid, ultrafiltration water and glucose according to a certain volume ratio to obtain a mixed liquid B; 3, mixed liquid is sprayed to the surface of the garbage, specifically, the mixed liquid A is sprayed in the morning, and the mixed liquid B is sprayed at night; step 4, welding an HDPE film to form a cover film and an air passage; covering the surface of the garbage with a covering film and an air passage; 5, arranging a landfill gas collecting pipe below the covering film; an air exhaust pipeline assembly is installed on the covering film, and the landfill gas collecting pipe penetrates out of the covering film to be communicated with the air exhaust pipeline assembly to extract landfill gas. The method has the effects of improving the deodorization rate of the household garbage, improving the methane yield and accelerating garbage degradation.