41results about How to "Will not enrich" patented technology

The invention relates to a continuous casting process of the metallurgy field and discloses a continuous casting process of steel for high titanium alloy welding rods. Full protection pouring is used during continuous casting, and long nozzle argon sealing protection pouring is used from a steel ladle to an intermediate ladle. The whole built-in submersed nozzle protection pouring is used from the intermediate ladle to a crystallizer. A covering agent is used by molten steel in the intermediate ladle. The electromagnetic stirring is used in the process of continuous casting and pouring. Full automation liquid level detection is carried out on the liquid level of the crystallizer. The continuous casting pulling speed is controlled automatically according to the degree of superheat of the intermediate ladle. The degree of superheat of the intermediate ladle in a first continuous casting and pouring furnace is controlled at 30-40 degrees centigrade. The pouring pulling speed is controlled in a range of 1.8-2.4 m / min. The protection slag is composed of the following components measured in percentage by weight: 0.80 + / - 0.15% of R, 35.0 + / - 3.5% of SiO2, 28.0 + / - 3.5% of CaO, less thanor equal to 5.0% of Al2O3, less than or equal to 4.0% of Fe2O3, less than or equal to 5.0% of MgO, 4.5 + / - 1.5% of F<->, 5.0 + / - 2.0% of K2O + Na2O and 12.0 + / - 2.5% of solid C. According to the continuous casting process, the molten steel is prevented from second oxidization in the process of pouring effectively; the stability of titanium in the molten steel is ensured; protection slag is prevented from denaturing; and the quality of the surface of a casting blank is enhanced.

The invention relates to an osteoblast targeted vector constructed based on a polypeptide. The targeted vector comprises a target head and a support. The target head is the polypeptide. The grafting mass ratio of the target head is 5-10%, and the mole grafting ratio is 2-6%. The targeted vector is prepared by subjecting the polypeptide and a vector to carboxylic acid covalent linking through polyethylene glycol, and is used for filling medicines treating bone fractures, osteoporosis, osteoarthritis, rheumatoid arthritis or tumor bone metastasis. Compared with the prior art, the targeted vector has osteoblast targeting performance, high bone tissue affinity and efficient medicine delivery capability, and is capable of enhancing osteogenesis effects, reducing medicine using amounts, and reducing cell toxicity and side effects. The targeted vector provides an important medicine delivery tool for future osteoporosis treatment.

The fuel cell pile includes end plate, current conduction board, multiple pole plates, multiple membrane electrodes, and seal washers. There is center hole on end plate, current conduction board, pole plates, and membrane electrodes respectively. There is connection orifice on end plate, and there is penetration hole on pole plate corresponding to the connection orifice. Current conduction board and membrane electrodes include holes corresponding to the said orifices and the penetration holes. Seal washers are arranged around the penetration holes on one face of pole plate as well as around center hole, and outer circumference on the other face. Bolts are separated from fuel channels in the invention. Reacting masses of cathode and anode can be diffused to any parts of cathode and anode. Thus, resultant of reaction and nonreactant can be eliminated in time. Advantages are: simple structure, wide adaptability, suitable to different devices by changing size and shape of fuel cell.

The invention discloses a method for preparing a proton exchange membrane, which is characterized by comprising the following steps of: pre-irradiating fluorine-containing olefin polymer powder and performing graft polymerization with a styrene monomer to prepare a membrane; and sulfonating the membrane to obtain the proton exchange membrane. The invention also discloses a proton exchange membrane prepared from the preparation method. The proton exchange membrane has the advantages of uniformly distributed monomers and high dimension stability of the membrane. The method for preparing the proton exchange membrane has the advantages of simple steps, low cost and suitability for industrial preparation of large-area continuous-roll proton exchange membranes.

The invention discloses a mixed surfactant for controlling the particle size of a fluorine-containing polymer emulsion and a method of preparing a fluorine-containing polymer therewith. The mixed surfactant is composed of any two or three selected from perfluoropolyether carboxylic acid, perfluoro fatty acid and low-molecular-weight perfluoropolyether. By using the mixed surfactant in water-phase polymerization of the fluorine-containing polymer, the particle size of the fluorine-containing polymer emulsion is controlled to be 50-150 nm and solid content of the emulsion is controlled to be 25-35. In addition, a reaction solution for preparing the fluorine-containing polymer with the mixed surfactant is homogeneous-phase, so that pre-emulsion before polymerization is unnecessary. The mixed surfactant can be applied in a fluorinated monomer emulsion polymerization reaction instead of perfluoroctanoic acid, thereby avoiding the problems of environment pollution, biotoxicity and the like due to usage of the perfluoroctanoic acid.