Abstract: An air management device may include three independently operated primary impellers 131, 131?, 131?, and drawn-in air is discharged through discharge ports 15?-1, 15?-2, 15?-3 provided in the front plate 15 of the housing 10. Louvers 141, 142, 143 installed downstream of the air flow and discharge ports 15?-1, 15?-2, 15?-3 may be independently opened or closed to provide discharge of the air to the surrounding environment. Further, at least one retractable or pop-up fan may be provided. The air management allows customization of air flow. The housing 10 of the furniture-type air management device may be installed on the floor of the livable space and may have a hexahedron shape that extends from side to side. A bottom inlet 11? may be formed on the bottom plate 11 of the housing 10 facing the floor of the living space above a predetermined distance. The replaceable filter 300 may be installed to filter the air sucked through the bottom inlet 11?, and may be drawn in and out of the housing 10.

Abstract: The present invention provides a gene including an M13 p5 expressing cassette, which includes a promoter, a ribosome binding site (RBS) and a protein 5 (p5) coding region, wherein at least one base of sequences between the RBS and the p5 coding region is mutated. Using this gene may increase production of single-stranded DNA.

Abstract: The present invention relates to a mutant microorganism in which a gene that encodes phosphofructokinase-2 is disrupted or deleted to reduce glycolytic flux to thereby improve the ability of the microorganism to produce N-acetylglucosamine, and to a method of producing N-acetylglucosamine using the mutant microorganism. The mutant microorganism according to the present invention has advantages in that it has high resistance to various chemical substances, grows rapidly, is easily cultured, and produces N-acetylglucosamine with high efficiency, indicating that it is useful for production of a large amount of N-acetylglucosamine.

Abstract: The present invention relates to a recombinant strain for producing 2,3-butanediol, comprising (a) an inactivated lactate dehydrogenase and (b) an inactivated sucrose regulator. According to the present invention, it is possible to economically produce 2,3-butanediol using a cheap carbon source, and the efficiency and productivity of 2,3-butanediol is remarkable compared with a wild type.

Abstract: The present invention relates to a method of screening a target metabolite-overproducing mutant strain using a synthetic suicide genetic circuit, and more particularly to a method of screening only a metabolite-overproducing mutant strain while killing a mutant strain that does not produce the metabolite, by introducing into mutant strains a synthetic suicide genetic circuit comprising a suicide gene coupled with a riboswitch. The method for screening a target metabolite-overproducing mutant strain according to the present invention has advantages in that a metabolite-overproducing mutant strain having a relatively fast or slow growth rate can be separated by visual observation, and in that the riboswitch that is used in the synthetic suicide genetic circuit can be replaced depending on the kind of target metabolite, and thus the synthetic suicide genetic circuit can be applied commonly to various strains.

Abstract: The present invention relates to a mutant microorganism in which a gene that encodes phosphofructokinase-2 is disrupted or deleted to reduce glycolytic flux to thereby improve the ability of the microorganism to produce N-acetylglucosamine, and to a method of producing N-acetylglucosamine using the mutant microorganism. The mutant microorganism according to the present invention has advantages in that it has high resistance to various chemical substances, grows rapidly, is easily cultured, and produces N-acetylglucosamine with high efficiency, indicating that it is useful for production of a large amount of N-acetylglucosamine.

Abstract: An oil pump includes a pump housing comprising an oil input port formed at one side of the pump housing. An oil output port is formed at another side of the pump housing. An oil flow unit is provided at a center of the pump housing, and the oil flow unit compresses and discharges oil input from the oil input port toward the oil output port. A bypass passage circulates the oil from the oil output port to the oil input port. A pressure control chamber allows the oil to flow through the oil output port and the bypass passage. The pressure control chamber has a plunger that is supported by an elastic body and moves in accordance with oil pressure. A bypass hole is formed at one side of the pressure control chamber and allows the oil passing through the oil output port to flow to the bypass passage when the plunger moves due to the oil pressure. The amount of oil flow increases depending on a movement distance of the plunger.

Abstract: The present invention relates to a recombinant strain for producing 2,3-butanediol, comprising (a) an inactivated lactate dehydrogenase and (b) an inactivated sucrose regulator. According to the present invention, it is possible to economically produce 2,3-butanediol using a cheap carbon source, and the efficiency and productivity of 2,3-butanediol is remarkable compared with a wild type.

Abstract: A refrigerator is disclosed. The refrigerator includes a cabinet comprising a storage chamber, a cold air generation chamber provided above the storage chamber, an evaporator provided in the cold air generation chamber, and a refrigerant tube configured to pass through a predetermined wall of the cold air generation chamber, not passing the storage chamber, to be connected with the evaporator. An object of the present disclosure is to provide a refrigerator which has an efficient installation structure of a refrigerant tube connected with an evaporator provided in a cold air generation chamber provided above a storage chamber to enlarge storage space of the storage chamber.

Abstract: An oil pump includes a pump housing comprising an oil input port formed at one side of the pump housing. An oil output port is formed at another side of the pump housing. An oil flow unit is provided at a center of the pump housing, and the oil flow unit compresses and discharges oil input from the oil input port toward the oil output port. A bypass passage circulates the oil from the oil output port to the oil input port. A pressure control chamber allows the oil to flow through the oil output port and the bypass passage. The pressure control chamber has a plunger that is supported by an elastic body and moves in accordance with oil pressure. A bypass hole is formed at one side of the pressure control chamber and allows the oil passing through the oil output port to flow to the bypass passage when the plunger moves due to the oil pressure. The amount of oil flow increases depending on a movement distance of the plunger.

Abstract: The present invention relates to a method of screening a target metabolite-overproducing mutant strain using a synthetic suicide genetic circuit, and more particularly to a method of screening only a metabolite-overproducing mutant strain while killing a mutant strain that does not produce the metabolite, by introducing into mutant strains a synthetic suicide genetic circuit comprising a suicide gene coupled with a riboswitch. The method for screening a target metabolite-overproducing mutant strain according to the present invention has advantages in that a metabolite-overproducing mutant strain having a relatively fast or slow growth rate can be separated by visual observation, and in that the riboswitch that is used in the synthetic suicide genetic circuit can be replaced depending on the kind of target metabolite, and thus the synthetic suicide genetic circuit can be applied commonly to various strains.

Abstract: A refrigerator includes a cabinet comprising a storage compartment An evaporator is positioned at an upper portion of the cabinet and generates cold air supplied to the storage compartment. A unit (e.g., closable damper) controls supply of cold air generated by the evaporator to the storage compartment.

Abstract: A refrigerating system is provided in which a heat exchanging unit performs heat exchange between first and second evaporators, so that the first and second evaporators have similar temperatures, and so that an additional “pump-down” operation may be avoided, thereby reducing compressor losses due to discharge occurrences. Since the additional pump-down operation may be avoided, power consumption may be reduced, and reliability and efficiency of the system may be enhanced. Additionally, a backflow preventing unit for preventing backflow of refrigerant in an evaporator may not be required, thus further reducing fabrication cost and complexity.

Abstract: Disclosed is a refrigerator in which a cool air generation chamber and a machine room are disposed in the upper portion of a main body of the refrigerator, and a structure of a cover grill disposed in front of the cool air generation chamber and the machine room is changed, thereby achieving stable heat radiation of the machine room and efficient operation of the refrigerator.

Abstract: A refrigerator, in which a main body includes a refrigerating chamber and a freezing chamber. A cold air generation chamber for the freezing chamber is provided on an uppermost part of the main body, communicates with the freezing chamber, and houses a freezing chamber evaporator. A cold air generation chamber for the refrigerating chamber is provided separate from the cold air generation chamber for the freezing chamber and houses a refrigerating chamber evaporator.

Abstract: A refrigerator includes an air guide that is provided with a defrost water hole and that is inclined toward the defrost water hole. The air guide guides cold air discharged from the cold air fan to a guide duct and also guides, to the defrost water hole, defrost water generated at the cold air fan.

Abstract: Disclosed is a refrigerator that includes a main body having a cooling chamber. The refrigerator also includes a door coupled to the main body and configured to open and close the cooling chamber. The refrigerator further includes a home bar positioned at a front surface of the door and configured to provide access to contents of the refrigerator without opening the door. In addition, the refrigerator includes a heater positioned at the home bar and configured to adjust an amount of heat based on an ambient temperature.

Abstract: A refrigerator includes a cabinet having a plurality of storage compartments and a cold air generating compartment provided in an upper portion of the cabinet. The cold air generating compartment is in communication with the plurality of the storage compartments and houses a plurality of evaporators, with each evaporator corresponding to a particular storage compartment in the cabinet.

Abstract: A refrigerator, in which an evaporator and a cold air fan are horizontally arranged in a cold air generating compartment positioned at an upper portion of the refrigerator. The evaporator and the cold air fan extend along a depth of the refrigerator in forward and rearward directions of the refrigerator.

Abstract: A refrigerator is provided. The refrigerator may include first and second refrigerant paths that separately distribute refrigerant, a first cooling chamber connected with a first cold air duct, a second cooling chamber connected with a second cold air duct, and a third cooling chamber connected with a third cold air duct. Cold air generated by a first evaporator is provided to the first cold air duct to cool the first cooling chamber, cold air generated by a second evaporator, which receives refrigerant from the first evaporator, is provided to the second cold air duct to provide concentrated cooling to the second cooling chamber, and cold air generated by a third evaporator is provided to the third cold air duct to cool the third cooling chamber.