Pusan National University Industry-University Cooperation Foundation

A refrigerator of the present embodiment includes: a cabinet having a storage space; a door that opens and closes the storage space; and a door opening and closing device to open and close the door, wherein the door opening and closing device includes: a driver that generates power, a power transmission portion that transmits the power of the driver, and an operating portion that receives the power of the driver and operates to open the door and including a link connected to the door, wherein the power transmission portion includes: an input gear assembly configured to receive power from the driver, an output gear assembly configured to be connected to the input gear assembly to receive power from the input gear assembly when the driver is operated, and to be disconnected from the input gear assembly when the driver is stopped, and wherein a rotation center of the input gear assembly and a rotation center of the output gear assembly are spaced apart from each other.

A refrigerator of the present embodiment includes: a cabinet having a storage space; a door that opens and closes the storage space; and a door opening and closing device for opening and closing the door. The door opening and closing device includes a driver for generating power, a power transmission portion for transmitting the power from the driver, and an operating portion having a link connected to the door and operated by receiving the power from the driver to open the door. The power transmission portion includes a clutch gear assembly, and the clutch gear assembly is configured to transmit power to the operating portion or block the power transmission. The clutch gear assembly includes a shaft, an input gear through which the shaft passes and which is connected to the driver, an output gear spaced apart from the input gear, and a connection gear configured to move in an axial direction of the shaft when the driver is operated to connect the input gear with the output gear, and move in the axial direction of the shaft to disconnect between the input gear and the output gear when the driver is stopped.

The present disclosure relates to an apparatus for producing an oxide single crystal, a method of producing a gallium oxide single crystal using the same, and a gallium oxide single crystal produced thereby. More specifically, the present disclosure relates to an apparatus for producing a single crystal and a method for producing a gallium oxide single crystal using the same, which may minimize the problem of impurities being introduced by a crucible, by applying a method of using the oxide pellets themselves, which are to be made into a single crystal, as a crucible without using a separate crucible, and maintain the growth atmosphere of the oxide single crystal at a high-oxygen atmosphere by applying a method of generating heat using a flame consisting of a mixture of a hydrocarbon fuel gas and oxygen gas, thereby producing a high-quality oxide single crystal with few defects.

Disclosed is a sensor for detection of nanoplastics, including: a membrane; a sample pad, a conjugate pad and an absorbent pad sequentially arranged on the membrane; and a test line and control line disposed between the conjugate pad and the absorbent pad, wherein the conjugate pad includes a fluorescent dye that binds to a target material, a first polymer that binds to the target material is immobilized on the test line, and a second polymer that binds to the fluorescent dye is immobilized on the control line.

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