32results about How to "Avoid cancer risk" patented technology

The invention relates to the technical field of biology, in particular to an application of exosomes from mesenchymal stem cell in preparation medicine of promoting vascularization or inducing angiogenesis. The exosomes, processed with gradient centrifugation, filtering and ultracentrifugation, is with high purity. The exosomes has the advantages of easy preparation and storage, high safety coefficient, easy absorption, wide medicine route, has targeting ability, and makes the endothelial cells of the blood vessels come together and create new vessels, so that the microcirculation is reconstructed to increase blood flow perfusion. The deficiency of other functions is not caused, and the exosomes has a wide application prospect.

The invention discloses a chitosan quaternary ammonium salt couplant and a preparation method thereof. The chitosan quaternary ammonium salt couplant is prepared from 0.1-0.9wt% of Carbomer 941, 0.5-6wt% of phenoxyethanol, 0.01-1.0wt% of hydrochloric acid, 0.1-0.8wt% of chitosan quaternary ammonium salt, 1.2-10wt% of triethanolamine, 2-20wt% of a humectant and the balance distilled water. The chitosan quaternary ammonium salt couplant has the advantages of good bactericidal effects, good environmental performances, no carcinogenesis on the human body, clarification, transparency, alcohol fragrance, good homogeneity and good fineness.

The invention provides a chrome-free tanning method of alligator skin. The chrome-free tanning method comprises the following steps of (1) adding water and sodium chloride to a rotary drum or a paddle vat, adding a pickling alligator skin blank after the sodium chloride is dissolved, rotating the rotary drum or paddling a paddle plate for 5-10 minutes, and regulating the pH value of a mixed solution inside the rotary drum or the paddle vat to 3.4-3.7; (2) adding an organic phosphonium salt tanning agent, an alcamines compound and fatty aldehyde to the rotary drum or the paddle vat, then rotating the rotary drum or paddling the paddle plate for 10-20 minutes, standing for 30-60 minutes, and repeating the operation of rotating the rotary drum or paddling the paddle plate and standing till the alligator skin blank is fully impregnated; (3) regulating the pH value of the mixed solution inside the rotary drum or the paddle vat to 5.8-6.2, then rotating the rotary drum or paddling the paddle plate for 5-10 minutes, standing for 30-60 minutes, and repeating the operation of rotating the rotary drum or paddling the paddle plate and standing for 3-5 times, then standing for 6-12 hours, and then completely discharging the mixed solution; (4) adding the water and an oxidizing agent to the rotary drum or the paddle vat, then rotating the rotary drum or paddling the paddle plate for 5-10 minutes, standing for 30-60 minutes, and repeating the operation of rotating the rotary drum or paddling the paddle plate and standing for 3-5 times.

The invention discloses a method for extracting exosome from amniotic mesenchymal stem cells and application of the exosome. The exosome is obtained through the steps of amnion separation, washing, epithelial cell removal, shearing, digestion, centrifugation, second-layer suspension taking, resuspension, inoculated culture, subsequent extraction preparation and the like. When the exosome is applied to a medicine for promoting angiogenesis and osteogenesis, vascular endothelial cell aggregation and angiogenesis can be achieved, a microcirculation is reconstructed, blood perfusion is increased,lost of other functions is not caused, and the application prospect is promising. According to the method, the cell extraction process is optimized, the amniotic stem cell extraction efficiency is higher, the purity is higher, and on the premise that more cells are obtained, it can be guaranteed that more exosomes are obtained.

The invention belongs to a medical biological material technology field, concretes a chitosan fiber film, wherein the fiber film is prepared from a chitosan spinning solution, which is a mixed solution containing chitosan, hexafluroisopropyl alcohol and acetate. The invention further provides a method for preparing the chitosan fiber film, and applications of the fiber film for preparing endocranium or endorhachis defect repairing material, cerebrospinal fluid leakage plugging material or a tissue adhesion prevention medicament.

The invention relates to tire tread which comprises 1-60 parts of solution polymerized styrene-butadiene rubber, 1-40 parts of natural rubber, 1.5 parts of environment-friendly promoter, 10-100 parts of high-dispersion white carbon black, 1-8 parts of silane coupling agent, 10-50 parts of carbon black and 1-20 parts of petroleum-series aromatic hydrocarbon oil. Preferably, the environment-friendly promoter is a compound of zinc dialkyl dithiophsophate and a carrier. The invention further provides a preparation method of the tire tread. The preparation process is divided into three adding and mixing stages, and the environment-friendly promoter is added at the productive stage. The tire tread and the preparation method have the advantages that combined use of the solution polymerized styrene-butadiene rubber, the natural rubber, the high-dispersion white carbon black, the silane coupling agent and the environment-friendly promoter is considered important for promoting scorching time, improving modulus and wear performance and lowering rolling resistance. By using the environment-friendly promoter, toxic, allergic and carcinogenic risks in the operation process can be avoided.

The invention discloses an intelligent cancer risk prediction method and system. The system comprises a touchable screen interaction interface, an artificial intelligence voice system, an internal memory and a system processor. A user touches a screen 'start' button on the touchable screen interaction interface to start answering questions; the artificial intelligence voice system directly interacts with the user, the artificial intelligence voice system can read each question to be answered by the user, and the user gives an answer meeting the condition of the user according to the heard question; and alternative answers of each question, a possible risk factor corresponding to each cancer and a relative risk degree between each risk factor and the corresponding cancer are preset in the internal memory of a terminal. The system allows the user to perform cancer risk prediction in various scenes, provides a simple and easy cancer risk screening means for the user, and can better prevent the cancer risk of the public.

The invention discloses application of rumex madaio makino to drugs for treating psoriasis, and particularly relates to the rumex madaio makino alcohol extract 70% ethanol eluted part which achieves the treatment effect through a way of immunoregulation. The invention provides pharmacodynamics study of the rumex madaio makino alcohol extract 70% ethanol eluted part on an imiquimod induced psoriasis mouse model and shows that the drug has an improving effect on the skin symptom caused by psoriasis, and meanwhile, can improve the symptoms of combination of psoriasis and liver and renal functiondamage, and thus the drug which is economical, effective, safe and reliable is provided for treatment of psoriasis.

The invention discloses environment-friendly building active glue which is prepared from polyvinyl alcohol powder and ozone water. The environment-friendly building active glue has the beneficial effects that the environment-friendly building active glue is safe and environment-friendly, free of substances, such as formaldehyde and acrylamide harmful to a human body, strong in bactericidal ability and fewer in bacteria; a carcinogenic risk caused by manpower can be avoided; human health of a worker can be protected; the building glue is fabricated in a manner of mixing the polyvinyl alcohol powder and the ozone water instead of the traditional heat boiling mode. The production technology is simplified; the target of producing the environment-friendly building active glue can be achieved by using simple equipment; the production is not limited by the conditions of time and place; the production efficiency is high; the used environment-friendly building glue is free of volatilizable harmful substances, has a good using effect, and plays a protection role in people living in the building; the environment-friendly effect can be completely achieved; popularization is facilitated.

The invention discloses a composite passivation solution and a preparation method thereof. The composite passivation solution does not contain chromium ions, so that heavy metals are prevented from causing carcinogenic hidden dangers to human bodies and harm to the ecological environment. In an anti-corrosion film formed by passivating the surface of a metal product through the composite passivation solution, the laminar graphene oxide can enhance the physical shielding performance of the anti-corrosion film on a corrosion medium; by adding the cobalt salt, the current inhibition capability of the anti-corrosion film can be enhanced; and ethylene diamine tetraacetic acid (EDTA for short) can be complexed and coordinated with metal ions to form a complex compound with an annular structure on one hand, and can also form a non-covalent bond with hydroxyl on the surface of graphene oxide on the other hand, so that the binding force between the anti-corrosion film and a metal substrate is improved. The preparation method of the composite passivation solution is simple in operation steps, and the feasibility of preparation and implementation of the composite passivation solution is ensured.

The invention discloses an antibacterial and alga-control film for barreled drinking water. The antibacterial and alga-control film is arranged in the body of a barrel; an antibacterial and alga-control film neck is arranged at the position of the outlet of the antibacterial and alga-control film for barreled drinking water; the mouth rim of the antibacterial and alga-control film neck extends out of the neck opening of the barrel; after the mouth rim of the antibacterial and alga-control film neck extends out from the neck opening of the barrel and turned down, the barrel neck opening is covered; and the barrel neck opening and the cover are matched and connected. The film has the advantages that: the effective use of the film in the production of barreled water reduces the cost of products, solves an ozone residue problem and avoids the potential cancer risks aroused to human body by superstandard bromated; meanwhile, lots of high-quality water resources are saved, serious environment pollution caused by immersing, sterilizing, washing and the like is reduced, and thus, the film is in accordance with the environment-protection, energy-conservation and emission-reduction policies of China.