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이윤동,이왕식,방원기 한국농화학회 1988 Applied Biological Chemistry (Appl Biol Chem) Vol.31 No.4
The optimal reaction conditions were investigated to produce L-phenylalanine from transcinnamic acid and ammonia by Rhodotorula glutinis IFO 0559. The highest amount of L-phenylalanine was produced when the reaction mixture containing 200mM of traps-cinnamic acid, 4M of NH₄OH, 250mM of (NH₄)₂SO₄ 0.005% of cetylpyridinium chloride (pH 10.5) and 50㎎/㎖ of dry cell was used. Among the nonaqueous organic solvents, petroleum ether was the most effective on the production of L-phenylalanine. The optimal concentration of petroleum ether in the reaction mixture was 50%. Under the optimal conditions, 21.1g/ℓ of L-phenylalanine was produced in 12hr, and the yield was 63.9% based on transcinnamic acid.
이윤동 수원대학교 기능성생명소재연구소 2003 자연과학연구논문집 Vol.2 No.1
CUSUM control chart is widely used for the efficient control of process mean. The performance of CUSUM is mainly described by its Average Run Length. We consider the extension of CUSUM for monitoring the process variance. Process variance is summarized by squared deviances which follows gamma distribution when the quality statistics are normally distributed. We developed a formal relationship between design parameters of CUSUM and its ARL when the squared deviances are used.