Abstract:
PURPOSE: A method for manufacturing a surface-modified metal substrate is provided to simplify process and to reduce production cost. CONSTITUTION: A surface-modified metal substrate contains a metal substrate and polymer layer which is chemically conjugated to the surface through oxygen atoms. A method for manufacturing the surface-modified metal substrate comprises: a step of introducing a hydroxy group to the surface of the metal substrate; a step of polymerizing monomers on the surface to chemically bind polymers onto the surface through oxygen atoms. The metal is selected from stainless steel, covalt-chrome, titanium, nitinol, gold, silver, platinum, tantalum, magnesium, and metal alloy thereof.
Abstract:
PURPOSE: An intelligent fibrin bio-adhesive with superior hemostasis effect and mechanical properties is provided to obtain an anti-bacteria property by adding natural polymer and/or antibiotics. CONSTITUTION: Fibrin and natural polymer form crosslinkage, and interpenetrating network or semi-interpenetrating network is obtained. The natural polymer is one or more selected from a group including alginate, chitosan, chitin, cellulose, agarose, amylase, dextran, proteoglycan, glycosaminoglycan, collagen, gelatin, heparin, hyaluronic acid, pectin, carrageena, chondroitin sulfate, dextran sulfate, polylysine, pullulan, carboxylmethyl chitin, and the salt of the same. Antibiotics are additionally introduced into the interpenetrating network or the semi-interpenetrating network.
Abstract:
PURPOSE: A novel pyrazole compound I provided to ensure excellent activity on ROS kinase enzyme and to suppress development of glioblastoma multiforma, CNS cancer, and brain cancer. CONSTITUTION: A pyrazole compound is denoted by chemical formula 1. A pharmaceutical composition for anti-cancer contains the pyrazole compound. An anticancer agent contains the pyrazole compound as an active ingredient. The anticancer agent is used for treating brain cancer, CNS caner, and glioblastoma multiforma. A method for preparing the pyrazole compound comprises: a step of reacting a hetero aromatic compound of chemical formula 3 with methyl 3-methoxy-5-methoxybenzoate compound of chemical formula 2 under the presence of lithium hexamethyldisilazide(LHMDS) to obtain a keto-enol tautomer compound; and a step of reacting the keto-enol tauotmer compound with hydrazine hydrate under anhydrous ethanol condition.
Abstract:
PURPOSE: A method of manufacturing a medical stent for releasing medical drugs and a medical stent for releasing medical drugs using the same method are provided, which have the nano-structured pattern using the plasma-assisted chemical vapor deposition. CONSTITUTION: A method of manufacturing medical stent for releasing medical drug having the nano-structured pattern includes: a step of coating the surface of stent with the biodegradable polymer; a step of forming the nano-structured pattern on the surface of the stent coated with the biodegradable polymer through the ion beam or the plasma process using the method of plasma-assisted chemical vapor deposition; and a step of dipping the medical drugs within the biodegradable polymer in which the nano-structured pattern is formed. The biodegradable polymer is the biodegradable polymer in which the medical drugs are dipped.
Abstract:
A method for preparing a biodegradable porous polymer scaffold having hydroxyapatite on the surface is provided to produce the biodegradable porous polymer scaffolds having improved cell affinity and osteoconductivity in a simple and effective manner. A method for preparing a biodegradable porous polymer scaffold having hydroxyapatite on the surface includes the steps of: (1) graft-polymerizing a functional group-containing hydrophilic monomer on the surface of a biodegradable porous polymer scaffold; and (2) immersing the obtained functional group-containing polymer scaffold in a simulated body fluid solution to form hydroxyapatite on the surface of the scaffold. The functional group-containing hydrophilic monomer is selected from the group consisting of organic acids having carboxylic acids at the terminals, monomers having phosphoric acids at the terminals, and mixtures thereof.
Abstract:
A cardiovascular system transplanting metallic material is provided to improve blood compatibility by modifying the surface of the metallic material with a sulfobetaine poly(ethylene glycol) derivative having anions. A metallic material has improved blood compatibility by modifying a surface of the metallic material with a sulfobetaine poly(ethylene glycol) derivative of the formula 1, X-R1-PEG-R1-Y, where R1 is one or more functional groups connected by urethane, urea, amide, ester, ether or anhydride comprising 0 to 20 alkyl groups or aryl groups; X is -NCO or -CHO; and Y is sulfobetaine(-N^+ -R2 -SO3^-) as a zwitterionic derivative, wherein R2 is an alkyl group or an aryl group. A manufacturing method of a metallic material of which surface is modified with a sulfobetaine poly(ethylene glycol) derivative comprises the steps of: oxidizing the surface of the metallic material to introduce a hydroxyl group(-OH) into the surface thereof; and chemically bonding the sulfobetaine poly(ethylene glycol) derivative to the hydroxyl group of the metallic material surface.
Abstract:
본 발명은 물리적, 기계적 특성 및 생체 적합성이 개선된 치과용 자가중합형 레진시멘트 조성물에 관한 것으로, 보다 구체적으로는 2,2-비스[4-(2-히드록시-3-메타크릴옥시프로폭시)페닐]프로판 (이하 "Bis-GMA로 칭함)과 Bis-GMA에 존재하는 히드록시기 (-OH)가 메타크릴레이트기로 치환된 멀티메타크릴레이트기 함유 다관능성 프리폴리머를 혼합한 프리폴리머 혼합물, 희석제, 접착 단량체, 중합개시제, 중합금지제, 광안정제, 산화방지제, 무기 안료 및 무기 충전재가 혼합된 페이스트(paste) A 조성물과, 상기 페이스트 A 조성물의 프리폴리머 혼합물과 동일한 프리폴리머 혼합물, 희석제, 접착 단량체, 환원제, 중합금지제, 광안정제, 산화방지제, 무기 안료 및 무기 충전재가 혼합된 페이스트 B 조성물로 구성된 치과용 자가중합형 레진시멘트 조성물에 관한 것이 다. 발명의 치과용 자가중합형 레진시멘트는 종래의 자가중합형 레진시멘트보다 우수한 물리적, 기계적 특성 및 생체 적합성을 나타내며, 연고-연고형 시스템으로서 사용이 간편하다.
Abstract:
PURPOSE: A composition of dental self-curing resin cements is provided, which composition is ointment-ointment system of which usage is convenient, and has improved fluidity, low polymerization contraction rate, low water absorption, low water solubility and low viscosity, so that the amount of an added diluting agent can be reduced and a large amount of inorganic filler can be mixed. CONSTITUTION: The composition of dental self-curing resin cements comprises a paste composition A comprising 1 to 25 wt.% of prepolymer mixture, 1 to 20 wt.% of diluting agent, 0.1 to 15 wt.% of adhesive monomer, 0.1 to 3 wt.% of polymerization initiator, 0.1 to 3 wt.% of polymerization inhibitor, 0.1 to 2 wt.% of photo-stabilizing agent, 0.1 to 2 wt.% of oxidation inhibitor, 0.005 to 1 wt.% of inorganic dye, and inorganic filler; and a paste composition B comprising 1 to 25 wt.% of prepolymer, 1 to 20 wt.% of diluting agent, 0.1 to 15 wt.% of adhesive monomer, 0.1 to 3 wt.% of reducing agent, 0.1 to 3 wt.% of polymerization inhibitor, 0.1 to 2 wt.% of photo-stabilizing agent, 0.1 to 2 wt.% of oxidation inhibitor, 0.005 to 1 wt.% of inorganic dye and inorganic filler, wherein the prepolymer is selected from 2,2-bis£4-(2-hydroxy-3-methacryloxypropoxy)phenyl|propane (Bis-GMA) of formula (1), Tri-GMA of formula (2), a mixture of Bis-GMA and Tetra-GMA of formula (3), and a mixture of Bis-GMA, Tri-GMA and Tetra-GMA.
Abstract:
PURPOSE: A method for preparing a soft lens is provided to obtain an unharmful soft lens for inhibiting the adsorption of proteins, thereby improving the wearing feeling and the lifetime of the lens. CONSTITUTION: The method comprises the steps of treating the surface of a contact lens with plasma to activate the surface; and grafting the protein adsorption inhibiting material represented by the formula 1 onto the surface, wherein R1 is H or methyl group; and R2 is polyethylene glycol, polypropylene glycol, polyethylene glycol-polypropylene glycol copolymer, polyethylene glycol-polypropylene glycol-polyethylene glycol copolymer, poly(vinyl pyrrolidone), their copolymers or their mixtures. The protein adsorption inhibiting material has a molecular weight of 100-10,000. Preferably the plasma treatment is carried out by using the plasma of 1 W to 1 kW; and the grafting is carried out at a temperature of 10-100 deg.C and in the presence of sodium hydrogensulfite as an oxidizing agent.