摘要:
The present invention relates to an extract of Stewartia koreana and use thereof. More particularly, it relates to an extract of Stewartia koreana which is extracted with any one selected from the group consisting of water, a C1-4 low alcohol, a polar solvent, a non-polar solvent and a mixture thereof, and a pharmaceutical composition for promoting angiogenesis or tissue regeneration and a cosmetic for improving wrinkles comprising the same as an effective ingredient. The extract of Stewartia koreana according to the present invention promotes migration and multiplication of endothelial cell and shows excellent effect in angiogenesis and wound healing and thus, is useful in treatment or prevention of diseases which requires angiogenesis for healing of wounded and frostbitten region, wound healing after surgical operation, and treatment and prevention of gastric ulcer, ischaemic heart diseases and hair loss. Also, the extract shows the dermal tissue regenerating effect and thus, is useful as a cosmetic for improving wrinkles.
摘要:
The present invention provides a method for updating betweenness centrality of a graph, which obtains the betweenness centrality of an unweighted graph, which is updated when edges are updated. First of all, the method is performed by obtaining a minimum union cycle (an MUC) of the updated graph, and extracting an MUC (MUCU) containing a vertex, which is incident to the updated edge. And a first betweenness centrality due to the shortest paths in the MUCU, and a second betweenness centrality due to the shortest paths, not included in the MUCU, are calculated. And finally, a final betweenness centrality of the graph is obtained by adding the first and second betweenness centralities. By using the method, the search space and calculation cost can be remarkably reduced.
摘要:
According to the present invention, an apparatus for manufacturing a multichannel electrode array for cranial nerve stimulation comprises: an electrode support (100) supporting a plurality of electric wires, and having a plurality of platinum rings inserted therein; a frame member (200) including a base (210), a pair of vertical frames (220), and a horizontal frame (240) to fix the electrode support (100); a rotating member (600) into the center of which the electrode support (100) is inserted, and which rotates such that electric wires are twisted, pair by pair, at the electrode support (100) so as to form a grid, when bobbins (700) that are wound with the electric wires slide; an elevating plate (500) rotatably and slidably supporting the rotating member (600); and a pair of left-side and right-side control units (800) and (900) which rotate the rotating member (600) such that the rotating member (600) slides along a length equal to that the grid. A multichannel electrode array manufactured according to the apparatus and method of the present invention can withstand unexpected forces and shocks as two pairs of electric wires (one disposed vertically and the other horizontally) move downward while alternately rotating so as to be twisted and form a grid, while a plurality of electric wires are vertically supported.
摘要:
A semiconductor device having an architecture for reducing an area is provided. The semiconductor device includes a memory cell array including a plurality of non-volatile memory cells, a plurality of registers each configured to store pre-fetch unit data, and a write driver circuit configured to write pre-fetch unit data sequentially output from the plurality of registers to the memory cell array during a write operation. The semiconductor device also includes a sense amplifier circuit configured to sense and amplify pre-fetch unit data sequentially output from the memory cell array and to sequentially store the amplified pre-fetch unit data in the plurality of registers, respectively, during a read operation.
摘要:
The present invention relates to a pearlescent pigment with large aspect ratio and a method of their preparation, and particularly to pearlescent pigments prepared by coating a metal or metal precursor on the flaky alpha-alumina crystals obtained by using an aluminum precursor aqueous solution and a zinc precursor aqueous solution as main ingredients. The crystals herein has an average particle thickness of 0.5 μm or less, an average particle diameter of 15 μm or higher and a large aspect ratio of 50 or higher, thereby being superior in gloss. The crystals show metal colors and interference colors of silver, gold, red, purple, blue and green.
摘要:
A method of producing a cyclic olefin polymer having a polar functional group and a high molecular weight with a high yield in which a catalyst is not deactivated due to polar functional groups, moisture and oxygen is provided. According to the olefin polymerization method, deactivation of a catalyst due to polar functional groups of monomers can be prevented, and thus a polyolefin having a high molecular weight can be prepared with a high yield, and the ratio of catalyst to monomer can be less than 1/5000 due to good activity of the catalyst, and thus removal of catalyst residues is not required.
摘要:
The present invention relates to a flaky α-alumina crystal and a preparation method thereof. More particularly, the present invention relates to a flaky α-alumina crystal comprising aluminum oxide and zinc oxide, which is prepared by hydrolyzing an aluminum precursor solution containing a water-soluble flux and a zinc precursor solution to obtain a gel mixture and aging, drying, calcining and crystallizing it under a specific reaction condition, and a preparation method thereof. Since the flaky α-alumina crystal of the present invention has a thickness of less than 0.5 μm, an average particle diameter of at least 15 μm and an aspect ratio of at least 50, it is useful as high-quality pearlescent pigment material and filler for ceramic materials.
摘要:
A spout assembly for enhancing self-standing force of a flexible container includes a fitting portion for attaching on a portion of the flexible container, and a supporting member assembled on or integrally formed on the fitting portion and extending to contact at least more than one portion of front, rear, bottom and top portions of the container, thereby maintaining a predetermined shape of the flexible container.
摘要:
The present invention relates to a manufacturing method of molecular sieve compound and in particular, to a manufacturing method whereas crystalline aluminosilicate salt is formed in the pores of activated carbon and thereby possessing both hydrophilic and hydrophobic adsorption capacity, therefore the molecular sieve compound manufactured according to this present invention is in use for treatment agent of wastewater, deodorizing agent, antibacterial and disinfectant agent, adsorbent of organic matter and water, removal agent of harmful gas of cigarette, separable agent of air and many other applications.
摘要:
The present invention relates to a pearlescent pigment with large aspect ratio and a method of their preparation, and particularly to pearlescent pigments prepared by coating a metal or metal precursor on the flaky alpha-alumina crystals obtained by using an aluminum precursor aqueous solution and a zinc precursor aqueous solution as main ingredients. The crystals herein has an average particle thickness of 0.5 μm or less, an average particle diameter of 15 μm or higher and a large aspect ratio of 50 or higher, thereby being superior in gloss. The crystals show metal colors and interference colors of silver, gold, red, purple, blue and green.