Abstract: A semiconductor memory device includes a bit line extending in a first direction on a substrate, an active pattern on the bit line, a word line on a first sidewall of the active pattern and extending in a second direction, a back gate electrode on a second sidewall of the active pattern and extending in the second direction, a gate isolation pattern on the first sidewall of the active pattern and including a low-k pattern extending in the second direction, and a data storage pattern connected to the second surface of the active pattern. The word line is between the active pattern and the gate isolation pattern, and a vertical distance between the bit line and the word line is greater than a vertical distance between the bit line and the low-k pattern.

Abstract: The present invention relates to a pharmaceutical composition including vitrified periodontal tissue-derived mesenchymal stem cells for prevention or treatment of male infertility. The pharmaceutical composition for prevention or treatment of male infertility according to the present invention recovers sex hormone levels in seminiferous tubules of atrophic testes and blood to normal levels through improvement in the activity of lipid metabolism enzymes in the liver, thereby exhibiting remarkable prophylactic and therapeutic effects on male infertility. In addition, the periodontal tissue-derived mesenchymal stem cells which are an active ingredient in the present invention can be obtained in the most non-invasive manner and as such, are expected to be advantageously used as a cell therapy product for male infertility.

Abstract: A multifunctional biobased waterborne polyurethane composition includes, based on 100 parts by weight of the polyurethane composition, 40 to 50 parts by weight of a polyol, 34 to 42 parts by weight of an isocyanate, 8 to 14 parts by weight of a chain extender, 0.03 to 0.12 parts by weight of a catalyst, and 0.005 to 0.02 parts by weight of a neutralizing agent.

Abstract: The present invention relates to a hydrogen generation apparatus using chemical hydride. The present invention features an electrolyte including chemical hydride and a catalyst that is inserted between metal electrodes, wherein the hydrogen is generated in a unit cell by hydrolysis of the hydride.

Abstract: The present invention relates to a hydrogen generation apparatus using chemical hydride. The present invention features an electrolyte including chemical hydride and a catalyst that is inserted between metal electrodes, wherein the hydrogen is generated in a unit cell by hydrolysis of the hydride.

Abstract: The present invention provides a mounting structure for a compressed gas storage tank of a vehicle in which at least two high pressure storage tanks are modularized and mounted in a vehicle. For this, the present invention provides a mounting structure for a compressed gas storage tank of a vehicle, comprising: a plurality of storage tanks for storing a compressed gas therein, including a hemispherical dome portion formed on both ends thereof; panel brackets connected to both ends of the storage tanks; pipe frames connecting edges of the panel brackets connected to both sides of the storage tanks; and high pressure parts and pipes connected to the storage tanks in a state where the panel brackets and the pipe frames are connected.

Abstract: The present invention provides a mounting structure for a compressed gas storage tank of a vehicle in which at least two high pressure storage tanks are modularized and mounted in a vehicle. For this, the present invention provides a mounting structure for a compressed gas storage tank of a vehicle, comprising: a plurality of storage tanks for storing a compressed gas therein, including a hemispherical dome portion formed on both ends thereof; panel brackets connected to both ends of the storage tanks; pipe frames connecting edges of the panel brackets connected to both sides of the storage tanks; and high pressure parts and pipes connected to the storage tanks in a state where the panel brackets and the pipe frames are connected.