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Glucose-Acetate 資化細菌 菌型과 그의 地域別 및 品種別 分布
鄭大柱,鄭照鍾,鄭址炘 全南大學校 農漁村開發硏究所 1986 농어촌개발연구 Vol.21 No.-
A glucose-acetate assimilating bacterium was investigated for the production of L-glutamic acid. The bacterium was isolated and identified as Brevibacterium saccharolyticum sp, from the various soil samples. which utilized glucose-acetate as a carbon source for the production of L-glutamic acid. Thirty one strains inc1uding this isolate produced more than 10g/l of L-glutamic acid. The maximum yield of L-glutamic acid at the optimal conditions. 2% glucose, 2% sodium acetate, 1 % ammonium acetate. 3~4μg/l biotin, pH7.5, 30℃, was 28g/l.
Glucose-Acetate 資化細菌에 의한 L-glutamin acid 生成
鄭大柱,鄭照鍾,鄭址炘 全南大學校 農漁村開發硏究所 1986 농산어촌개발연구 Vol.21 No.-
A glucose-acetate assimilating bacterium was investigated for the production of L-glutamic acid. The bacterium was isolated and identified as Brevibacterium saccharolyticum sp, from the various soil samples. which utilized glucose-acetate as a carbon source for the production of L-glutamic acid. Thirty one strains inc1uding this isolate produced more than 10g/l of L-glutamic acid. The maximum yield of L-glutamic acid at the optimal conditions. 2% glucose, 2% sodium acetate, 1 % ammonium acetate. 3~4μg/l biotin, pH7.5, 30℃, was 28g/l.
적외선 열화상 카메라를 이용한 탄소강관 용접부 결함검출
권대주(DaeJu Kwon),정나라(NaRa Jung),김재열(JaeYeol Kim) 한국트라이볼로지학회 2014 한국트라이볼로지학회지 (Tribol. Lubr.) Vol.30 No.2
The piping system accounts for a large portion of the machinery structure of a plant, and is considered as a very important mechanical structure for plant safety. Accordingly, it is used in most energy plants in the nuclear, gas, and heavy chemical industries. In particular, the piping system for a nuclear plant is generally complicated and uses the reactor and its cooling system. The piping equipment is exposed to diverse loads such as weight, temperature, pressure, and seismic load from pipes and fluids, and is used to transfer steam, oil, and gas. In ultrasound infrared thermography, which is an active thermography technology, a 15-100 kHz ultrasound wave is applied to the subject, and the resulting heat from the defective parts is measured using a thermography camera. Because this technique can inspect a large area simultaneously and detect defects such as cracks and delamination in real time, it is used to detect defects in the new and renewable energy, car, and aerospace industries, and recently, in piping defect detection. In this study, ultrasound infrared thermography is used to detect information for the diagnosis of nuclear equipment and structures. Test specimens are prepared with piping materials for nuclear plants, and the optimally designed ultrasound horn and ultrasound vibration system is used to determine damages on nuclear plant piping and detect defects. Additionally, the detected images are used to improve the reliability of the surface and internal defect detection for nuclear piping materials, and their field applicability and reliability is verified.
Glucose-Acetate 資化細菌에 의한 L-Glutamic acid生成
鄭熙鍾,鄭大柱,鄭址炘 全南大學校 農漁村開發硏究所 1986 農業科學技術硏究 Vol.21 No.-
A glucose-acetate assimilating bacterium was investigated for the production of L-glutamic acid. The bacterium was isolated and identified as Brevibacterium saccharolyticum sp, from the various soil samples, which utilized glucose-acetate as a carbon source for the production of L-glutamic acid. Thirty one strains including this isolate produced more than 10g/ℓof L- glutamic acid. The maximum yield of L glutamic acid at the optimal conditions, 2% glucose, 2% sodium acetate, 1% ammonium acetate, 3~4㎍/ℓbiotin, pH 7.5, 30℃, was 28g/ℓ.