14results about How to "Molecular small" patented technology

The invention relates to the technical field of waste treatment, in particular to a kitchen waste treatment method, a carbon source and application thereof. The kitchen waste treatment method comprises the following steps: performing directional fermentation treatment on kitchen waste in an acid environment to obtain a fermentation mixture; filtering the fermentation mixture to obtain filtrate; the filtrate is sequentially subjected to distillation treatment and condensation treatment, volatile organic compounds are collected, and condensate containing volatile fatty acid and low-molecular alcohol is obtained. According to the kitchen waste treatment method, directional fermentation treatment is carried out, and a fermentation mixture is rich in volatile organic compounds including volatile fatty acids (VFAs) such as propionic acid, butyric acid and acetic acid and low-molecular alcohols such as propyl alcohol and ethyl alcohol. And carrying out filtration treatment to reduce the nitrogen content and the suspended matter value in the filtrate. After distillation treatment, the small-molecular organic matters in the filtrate are evaporated, less water is evaporated, and the nitrogen-containing components in the filtrate are almost not evaporated. And the prepared condensate is high in COD value, high in content of micromolecular organic matters and extremely low in nitrogen content.

The invention relates to application of a p85alpha truncated expression construct in prevention of UVB-induced skin light injury, and provides nucleic acid for coding the truncated expression construct, a recombinant vector, a recombinant host cell and a primer group for amplifying the nucleic acid. The invention discloses a p85 alpha truncated expression construct which can antagonize UVB-induced PERK-p53-PERP pathway activation and cell apoptosis promotion effects. The mutant and derivatives thereof have application values in prevention of UVB-induced skin light injury reaction and preparation of products for prevention of UVB-induced skin light injury.

The present invention provides a use of an antimicrobial peptide in the preparation of a drug for resisting Staphylococcus aureus infection. In a pneumonia mouse model infected with Staphylococcus aureus, the therapeutic effect of GHb3K and GHbK4R is better than that of vancomycin, the inflammatory response can be significantly reduced, and the in vivo toxicity is lower than that of vancomycin. GHb3K and GHbR can significantly promote the healing of chronic infectious wounds of methicillin-resistant Staphylococcus aureus (MRSA), and the therapeutic effect is better than that of mupirocin ointment. The antimicrobial peptide provided by the present invention has the potential to be developed into a drug for treating pneumonia infected with Staphylococcus aureus and a drug for treating chronic wounds infected with MRSA.

The invention relates to the technical field of lubricant preparation, and in particular to a peracetic acid-based lubricant and a preparation method thereof. The lubricant is prepared from an agent A, an agent B and an agent C in a mass ratio of 10-15:10-12:45-50. The invention uses benzotriazole and polyaspartic acid as corrosion inhibitors, and mixes the agent A, the agent B and the agent C in a specific ratio, wherein the benzotriazole can quickly migrate to a metal surface to avoid corrosion, and during use, the polyaspartic acid competes with the benzotriazole metal surface for adsorption, gradually replacing the benzotriazole, thereby reducing the residual amount of the benzotriazole on the metal surface. In addition, since the polyaspartic acid has low toxicity and high safety, the safety hazard can also be reduced to a certain extent, and finally a lubricant with good stability, high lubricity, low foam residue and capable of sterilization is obtained.

The invention belongs to the technical field of mineral processing, and particularly relates to a method for extracting pure natural crystalline flake graphite through selective flotation of modified water glass. According to the method, different modified water glass is adopted for different graphite ores for the first time, and the product with high fixed carbon content and high recovery rate is obtained through cooperation of the flotation technology. The method comprises the following steps: crushing and grinding natural crystalline flake graphite ore to set fineness, then mixing with water to prepare ore pulp, adding a pH regulator to regulate the pH of the ore pulp, then adding modified water glass according to a set dosage, then sequentially adding a collecting agent and a foaming agent, and finally carrying out air inflation and foam scraping to obtain flotation concentrate. The process is simple and controllable, the fixed carbon content of the product obtained through roughing can be further improved after fine selection, and industrial application is facilitated.

This application discloses a method and apparatus for predicting and controlling dissolved gas precipitation at the end of brine discharge in a salt cavern gas storage facility, comprising the following steps: acquiring basic data required for prediction and control at the end of brine discharge; establishing or calling a table of equilibrium solubility data of the stored gas in the brine based on the composition, pressure, temperature, and salinity of the stored gas; determining the initial dissolved gas state of the brine at the interface, using the boundary condition that the brine and stored gas reach dissolution equilibrium at the gas-liquid interface of the salt cavern; establishing a coupled calculation model of dissolved gas precipitation and wellbore gas-liquid two-phase flow during the brine return process to predict the gas phase volume fraction of the fluid returning from the wellhead; generating a safe operating envelope diagram of back pressure-discharge rate at different gas-liquid interface positions, using the wellhead back pressure as the main control variable and the brine discharge flow rate as the auxiliary correction variable, with the wellhead back pressure as the main control variable and the brine discharge flow rate as the auxiliary correction variable; and outputting a suggested point for terminating brine discharge when any wellhead safety constraint cannot be met.

The invention discloses a solvent-free soft repairing mortar and a preparation method thereof, wherein the solvent-free soft repairing mortar comprises component A and component B, wherein component A and component B are in a weight ratio of 100:4.5-10; wherein component A comprises the following components in parts by weight: 100 parts of polybutadiene, 0.8-3 parts of chain extender, 30-65 parts of polyvinyl chloride-vinyl acetate paste resin, 0-15 parts of carbon black, 0-15 parts of titanium dioxide, 0-3 parts of organic bentonite, 0-3 parts of white carbon black, and 0-15 parts of filler; and component B comprises solvent-free polydiisocyanate. The invention has the advantages of environmental protection, flame retardancy, fast curing speed at room temperature, high bonding strength, good corrosion resistance, good wear resistance, etc.; and solves the problems of slow curing speed, low bonding strength, easy peeling and delamination, poor corrosion resistance and wear resistance of the existing solvent-based repairing mortar.

This invention relates to a chromium-free tanning agent based on hydrogen bond reinforcement and its preparation method. The invention first prepares single-terminated and double-terminated -NCO ureapyrimidine ketone compounds, then reacts these compounds with an aqueous solution of bisulfite to prepare a water-soluble reactive ureapyrimidine ketone-based chromium-free non-metallic tanning agent. Compared with conventional organic synthetic tanning agents, the chromium-free tanning agent developed in this invention can both covalently bind with skin collagen and further form a quadruple hydrogen-bonded dimer in the leather fiber network through the hydrogen bond recognition effect of ureapyrimidine ketones (Upy). This strong hydrogen bonding between tanning agent molecules strengthens the molecular cross-linking network structure of the tanned leather, resulting in higher shrinkage temperature and mechanical strength. In particular, the tanning agent developed in this invention contains two types of tannin molecules of different sizes, exhibiting excellent selective filling effect. The tanned leather is full and uniform, with good softness, and can be used in the production of light-colored lightweight leather.

The invention discloses a VHH chain of an anti-GST (glutathione S-transferase) nano antibody and application of the VHH chain. The VHH chain of the anti-GST nano antibody comprises amino acid sequences which are arranged as follows: FR1, CDR1, FR2, CDR2, FR3, CDR3 and FR4; the specific amino acid sequences are as follows: CDR1 is shown as SEQ ID NO: 1, CDR2 is shown as SEQ ID NO: 2, CDR3 is shown as SEQ ID NO: 3, FR1 is shown as SEQ ID NO: 4, FR2 is shown as SEQ ID NO: 5, FR3 is shown as SEQ ID NO: 6, and FR4 is shown as SEQ ID NO: 7. According to the obtained anti-GST nano antibody, it is found through ELISA tests that the affinity of the antibody GSTVHH reaches 54.5 nM, the antibody can be expressed in microorganisms, is good in water solubility and high in stability and has excellent performance, the blank of the prior art can be filled, and development of related fields is promoted.

The invention provides an earthworm protein extract as well as an extraction method and application thereof. The earthworm protein extract can be applied to agricultural production. The extraction method comprises the following steps: preparing cleaned earthworms into earthworm homogenate; adding water into the earthworm homogenate, and carrying out solid-liquid separation to obtain an extracting solution containing earthworm protein; then protease is added for enzymolysis; and performing purification treatment on the extracting solution after enzymolysis to obtain the earthworm protein extract. The extraction method of the earthworm protein extract is simple, extraction parameters are controllable, and the extracted earthworm protein is high in extraction rate and purity. The earthworm protein extract is rich in eighteen amino acids, various nucleotides, FA proteins and other components, can provide essential raw materials for plant metabolism, is beneficial to plant tissues to coordinate cell division and differentiation activities, can effectively improve the yield, quality and resistance of crops, and has the effects of improving the soil structure, improving the soil fertility and the like.

This application provides a bio-based chain extender and its application. The bio-based chain extender includes the bio-based compounds 2,5-furandicarboxaldehyde dioxime and / or 5-hydroxymethyl-2-furancarboxaldehyde dioxime. Using these as bio-based chain extenders, modified polyurethanes with antibacterial and antifungal properties can be synthesized. This imparts long-lasting, stable, and broad-spectrum antibacterial and antifungal properties to polyurethane materials, eliminating the need for additional antibacterial agents. This avoids problems such as environmental pollution, short antibacterial time, and unstable antibacterial performance caused by antibacterial agent migration during the use of polyurethane materials. In particular, this bio-based chain extender is bio-based, safe, and environmentally friendly, and has a significant effect on the antibacterial and antifungal modification of polyurethane materials, showing broad application prospects in medical materials, public facilities, and health protection.

The invention belongs to the technical field of skin care and health care, and particularly discloses a compound protein peptide multi-vitamin nutritional composition and a preparation method thereof. The compound protein peptide multi-vitamin nutritional composition is prepared from 20-30 parts of indigo fruit powder, 15-25 parts of cranberry powder, 5-8 parts of radix angelicae sinensis, 5-8 parts of fructus lycii, 4-6 parts of fructus schizandrae, 1-3 parts of pectinase, 3-8 parts of bovine bone collagen peptide, 3-8 parts of fish collagen peptide, 3-8 parts of colla corii asini protein peptide, 0.5-1 part of nicotinamide, 2-5 parts of sodium ascorbate, 1-3 parts of gamma-aminobutyric acid and 10-30 parts of polydextrose. The compound protein peptide multi-vitamin nutritional composition disclosed by the invention has the characteristics of small molecules, high activity and good stability, can stay in a human body for a long time during use, is beneficial to full absorption, and can play roles in beautifying, protecting skin, fading spots, removing free radicals, resisting oxidation, supplementing collagen, improving skin quality, improving mental state and the like.