Abstract:
The present invention relates to a preparation method of sitagliptin, and more particularly, to a method of preparing sitagliptin using L-aspartic acid having a (R)-beta amino acid structure by mild amide formation, by the use of industrially applicable halo isopropylmagnesium, and by removal of amine protecting group using Pd/C and H2 and carbonyl reduction using reducing agent.
Abstract:
The present invention relates to novel Forms A, B, C, D, E, F and G of crystalline 9-[2-[phosphonomethoxy]ethyl]adenine bis-pivaloyloxymethyl ester, i.e., adefovir dipivoxil, and processes for preparing them. According to the present invention, said novel crystal forms having a high purity can be obtained by a simple method and in a high yield.
Abstract:
A home appliance system and an operation method thereof are disclosed. The home appliance outputs product information as a predetermined sound and transmits the sound through a connected communication network, thereby making it easier for a service center at a remote place to check a status of the home appliance. Further, the home appliance system and operation method thereof prevents noise or signal error generated in the procedure of converting product information into a signal of a predetermined frequency band in order to output the product information as a sound, thus enabling stable signal conversion and improving the accuracy of information transmission using the output of sound.
Abstract:
The present invention relates to a method for preparing artificial wood using a natural vegetable fibroid material, and more specifically, to a preparation method of artificial wood comprising: the binder coating step of mixing a synthetic resin comprising polypropylene or high density polyethylene, and ethylene-vinyl acetate or linear low density polyethylene with a binder selected from maleated polypropylene (MAPP), a titanate-based binder and a zirconia-based binder and a silicone oil; the drying step of drying one or more natural vegetable fibroid powders selected from the group consisting of waste paper, rice straw, corn stalks, African millet stalks, hemp, coffee husks, coconut leaves, sugarcane dregs and green tea dregs; the first mixing step of mixing the binder-coated synthetic resin and the natural vegetable fibroid powders dried at the drying step; the second mixing step of adding one or more additives selected from the group consisting of a lubricant, an antioxidizing agent, a UV stabilizer, a nucleating agent, a filler and an inorganic pigment to the natural vegetable fibroid powders from the first mixing step to mix the mixture; and the molding step of adding a swelling agent and molding the mixture into synthetic wood using an extrusion molding machine. Artificial wood which is light and can maintain a strength (physical property) similar to that of natural wood by remarkably reducing the content of a synthetic resin which is heavy and has a high toxic gas production rate in case of a fire is provided, by employing the method for preparing artificial wood using a natural vegetable fibroid material of the present invention.
Abstract:
The present invention relates to an artificial wood using a natural vegetable fibroid material,and more specifically, to an artificial wood comprising: one or more natural vegetable fibroid powders selected from the group consisting of waste paper, rice straw, corn stalks, African millet stalks, hemp, coffee husks, coconut leaves, sugarcane residue and green tea residue; a synthetic resin comprising polypropylene or high density polyethylene, and ethylene-vinyl acetate or linear low density polyethylene; one binder selected from maleated polypropylene (MAPP), a titanate-based binder and a zirconia-based binder; and one or more additives selected from the group consisting of a lubricant, an antioxidizing agent, a UV stabilizer, a nucleating agent, a filler and an inorganic pigment. The artificial wood using a natural vegetable fibroid material of the present invention is light and can maintain a strength (physical property) similar to that of a natural wood by remarkably reducing the content of a synthetic resin which is heavy and has a high toxic gas production rate in case of a fire.
Abstract:
The present invention relates to a glycoprotein analysis kit and to the use thereof, and more particularly, to a glycoprotein analysis kit comprising a fluorescein-labelled antibody, a fluorescein-labelled biomaterial, and a support, to a double-probe method that enables, using the kit, a quantitative analysis of the content and glycosylation characteristics of a glycoprotein at the same time, to a method for selecting, using the kit, a single cell which produces a glycoprotein having desired glycosylation characteristics, and to a cell which is selected by means of the method, and which produces a glycoprotein having desired glycosylation characteristics.
Abstract:
The present invention relates to a composition for manufacturing an artificial wisteria stem, a method for manufacturing an artificial wisteria stem, and an artificial wisteria stem manufactured thereby, and more specifically, to a composition for manufacturing an artificial wisteria stem that comprises a binder for stretch-reform for natural vegetable powder and synthetic resin to be mixed well. Also, the present invention relates to a method for manufacturing an artificial wisteria stem and an artificial wisteria stem manufactured thereby, the method for manufacturing artificial wisteria stem that surface-treats the natural vegetable powder with the binder for stretch-reform so as to mix evenly with the synthetic resin, and forms external protrusion on one surface of a base material when manufacturing the composition for manufacturing artificial wisteria stem into a film-type base material. The artificial wisteria stem of the present invention has superior water resistance, corrosion resistance, durability, weather resistance, permeability, and flame resistance compared to natural materials such as reed, rush, wisteria, and bamboo tree, or synthetic resin materials. Also, the present invention is environmentally friendly, thereby generating no harmful substance, and in particular, has excellent anti-bacterial effects, and shows excellent natural texture. Also, the method for manufacturing an artificial wisteria stem of the present invention provides an artificial wisteria stem that reduces manufacturing cost by reducing the weight of the product, therefore being economical, and has an enhanced processability.
Abstract:
The present invention relates to a linear compressor, and particularly relates to a linear compressor capable of varying a natural cooling capacity while removing a capacitor connected to a motor. The linear compressor according to the invention comprises: a fixed member that includes a compression room formed therein; a movable member that compresses a sucked refrigerant into the compression room while linearly reciprocating inside the fixed member; at least one spring that is provided to elastically support the movable member in a movement direction of the movable member; a motor that is provided in connection with the movable member so as to linearly reciprocate the movable member in a shaft direction; a motor control unit that varies a cooling capacity through the reciprocation of the movable member corresponding to a load by controlling an AC voltage applied to the motor such that a stroke of the movable member is proportional to a magnitude of the AC voltage.
Abstract:
The present invention relates to novel Forms A, B, C, D, E, F and G of crystalline 9-[2-[phosphonomethoxy]ethyl]adenine bis-pivaloyloxymethyl ester, i.e., adefovir dipivoxil, and processes for preparing them. According to the present invention, said novel crystal forms having a high purity can be obtained by a simple method and in a high yield.
Abstract:
The present invention relates to a laminated nanostructure including magnetic nanoparticles having a perpendicular magnetic anisotropy, to a method for producing same, and to a magnetic storage medium using same. More particularly, the present invention relates to a laminated nanostructure which is produced using a porous thin film as a template, and by depositing magnetic nanoparticles in the pores of the thin film through an electrodeposition process. As a result, the gaps between nanoparticles are uniform, the sizes of nanoparticles are small, and nanoparticles are free from a polarity interaction therebetween, thus enabling each of the nanoparticles to have its own polarity, and to achieve perpendicular magnetic properties.