42results about How to "No threat to health" patented technology

The invention discloses a botanical bactericide and a preparation method thereof. The botanical bactericide uses purely natural plant essential oil as effective bactericidal components and is prepared by using the following raw materials in percent by mass: 15-25 percent of turpentine, 10-20 percent of tea tree oil, 10-25 percent of camphor tree oil, 20-30 percent of eucalyptus oil, 5-10 percent of thickener, 2-4 percent of suspending agent and 5-8 percent of emulsifying agent. The botanical bactericide provided by the utility model is suitable for crops such as vegetables, melons and grains, can be used for preventing and controlling major diseases such as powdery mildew, rust diseases, net blotch and gray mold caused by ascomycetes, basidiomycetes and oomycetes, and has the advantages of wide bactericidal scope, environmental friendliness, high safety and the like.

The invention discloses a flexible transparent electric conducting film and a manufacturing method thereof. The electric conducting film comprises a flexible transparent base plate, wherein a transparent oil ink layer is coated on the surface of the flexible transparent base plate; the surface layer of the transparent oil ink layer is an electric conducting layer pasted with nano silver wires; and the nano silver wires in the electric conducting layer are mutually overlapped so as to form a uniform two-dimensional nano silver wire network. The preparation method comprises the following steps of: printing or coating the transparent oil ink on the flexible transparent base plate; coating a nano silver wire dispersing liquid uniformly on the surface of another flexible transparent base plate so as to obtain a nano silver wire thin film; and through a hot pressing or transfer printing mode, transferring and pasting the thin film to the surface layer of the transparent oil ink so as to obtain the flexible transparent electric conducting film. The electric conducting film surface provided by the invention is lower in resistance value and is high in bonding force of each layer, has favorable contact, and has good uniformity; and the preparation method is simple in technology and is low in cost, and can prepare large-area transparent electric conducting films, and the prepared transparent electric conducting film has favorable electric conducting performance.

The invention provides a formula of a special water purifying agent for aquaculture. The formula is prepared from the following components by weight percent: 5 to 30 percent of isopropylamine, 5 to 20percent of water, 8 to 25 percent of L-carnitine, 10 to 20 percent of epichlorohydrin, 1 to 10 percent of absolute ethyl alcohol, 3 to 20 percent of OP-10, 0.5 to 3 percent of elemental iodine, and 1to 12 percent of phosphoric acid. The product is a nontoxic and pollution-free environment-friendly product, can effectively inhibit the growth of viruses, bacteria, fungi, harmful algae and the like, has the characteristics of high efficiency, durability, high penetrating capacity, small application dosage and the like, and can be widely used for purifying culture water and preventing diseases of aquaculture animals. The product is the water purifying agent and is specially used for sterilizing and purifying the culture water; and meanwhile, the water purifying agent is also used for preventing and treating skin ulcer syndrome, stomach ulcer disease and piebald syndrome of sea cucumbers, and white spot syndrome, early death syndrome, acute hepatopancreas necrosis and the like of shrimps.

The invention relates to glycidyl methacrylate (GMA) graft modified polyvinyl acetate-based reverse core-shell emulsion and a preparation method thereof, belonging to the technical field of emulsion adhesive. The GMA graft modified polyvinyl acetate-based reverse core-shell emulsion is mainly prepared from a first core layer monomer, a second core layer monomer, a shell layer monomer, a graft monomer, a composite emulsifier, an initiator, a pH buffering agent, deionized water and a functional monomer, wherein the first core layer monomer is vinyl acetate, the second core layer monomer is butylacrylate, the shell layer monomer is styrene, the graft monomer is maleic anhydride, the composite emulsifier is a mixture of PCA507 and PCA078, the initiator is ammonium persulfate, the pH buffer isNaHCO3, and the functional monomer is GMA. The raw materials used in the preparation method are cheap and easy to obtain; the prepared functional monomer GMA modified core-shell composite emulsion type adhesive is non-toxic, harmless and simple in production and use process, and can be directly used as water-based adhesive.

The invention discloses a preparation method of a biological multilayer nerve conduit containing mesenchymal stem cells. The method comprises the following steps: (1) dissolving a photocurable biological hydrogel with a PBS solution containing a photoinitiator to obtain two concentrations of biological ink; (2) collecting mesenchymal stem cells with confluence degree of more than 80%, and resuspending the mesenchymal stem cells with low concentration of biological ink after treatment to obtain cell-loaded biological ink; 3) load that cell-loaded biological ink and the high-concentration biological ink into two nozzles of the biological 3D printing device respectively; (4) setting printing parameters, firstly printing the cell-carrying biological ink on the optical axis rotating uniformly to obtain a first layer of nerve conduit; And then printing high-concentration biological ink to obtain a double-layer hollow tubular nerve conduit; (5) Biological multilayer nerve conduit was obtainedby ultraviolet irradiation. The invention has the advantages of short preparation time, simplicity, mild operation conditions, simple structure, good biocompatibility and degradability of the prepared nerve conduit.

The invention relates to a primer group, a method and a kit for detecting the triploids of a fetus by virtue of plasma free DNS in maternal peripheral blood, wherein the DNA is selected from human No. 21, No. 18 and No. 13 chromosomes, 300 pairs of sequence specific primers are designed with regard to the No. 21, No. 18 and No. 13 chromosomes respectively, each pair of the sequence specific primers comprises a forward primer, a reverse primer and a middle primer, and the gene sequence numbers of the primers are SEQ ID NO: 1-2700. The primer group, the method and the kit disclosed by the invention have the following beneficial effects: the triploids of the fetus are detected by the method disclosed by the invention, the detection is non-invasive detection without a threat on the health of the fetus, diagnosis and detection are high in accuracy and low in expense, flow and data analysis are simple and convenient, and PCR reaction condition requirements are not rigorous; the primer group, the method and the kit are wide in applicability, can be used for promoting the popularization of non-invasive screening for a trisomic syndrome, and are conductive to improving the population quality of China.

The invention relates to a municipal solid waste processing system comprising a sorting system, a pretreatment system, and an anaerobic fermentation system. The sorting system comprises a receiving hopper, a plate feeder positioned on the bottom of the receiving hopper, a uniform material-toggling bag-breaking device, and a cylinder broken bag screening machine. The pretreatment system comprises a crushing device, a sand-water separation device, and a waste receiving hopper connected with a sorting platform. The waste receiving hopper is connected with the crushing device and the sand-water separation device through a conveyor. A slag-discharge screw, a grid, a gas / water circulation device, and a rotary crushing device are arranged in the sand-water separation device. The anaerobic fermentation system comprises a homogenization tank connected with a lift pump. The homogenization tank is connected with an anaerobic digestion tank. The anaerobic digestion tank is respectively connected with a biogas purification device, a power generation system, and a sludge storage tank. The system and the method provided by the invention have the advantages that: with the sorting system, the pretreatment system, and the anaerobic fermentation system, the waste is turned harmless, and is converted into resources. Also, the amount of waste is reduced.