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최경구,최영곤,김하윤,김주식 한국공업화학회 2014 한국공업화학회 연구논문 초록집 Vol.2014 No.1
PKS(Palm Kernel Shell)는 리그닌이 풍부한 바이오매스로 lignocellulosic biomass로 구분된다. 이러한 특성으로 인해 PKS는 열분해 시 상대적으로 phenol 및 phenolic compounds가 풍부한 bio-oil을 생산할 수 있다. Phenol은 formaldehyde와 함께 혼합되어 plywood용 resin의 주 원료이며 phenolic compounds도 같은 역할울 할 수 있다. 기존의 phenol은 화석연료로부터 얻어지기 때문에 최근의 여러가지 환경문제와 에너지고갈 문제가 대두됨에 따라 대체 source 개발이 시급하다. 이러한 배경으로 PKS로부터 얻어진 bio-oil은 대체 source로써 많은 관심을 받고 있다. 본 연구에서는 bench scale의 유동층 반응기를 사용하였으며 bio-oil은 cyclone 및 bag filter를 통과한 vapor가 quenching system을 통해 급속 냉각되어 얻어졌다. Plywood용 resin 생산은 기존의 commercial resin과 다른 조건없이 물리적으로 섞어 사용하였다. 마찬가지로 Plywood는 기존의 plywood 생산공정과 동일한 조건에서 만들어졌으며, 압축강도를 측정하여 물성을 확인하였다. 이 결과로 bio-oil이 plywood용 resin 생산 공정에서 phenol을 대체할 수 있는지 알아볼 수 있었다.
人蔘種子의 後熟과 發芽에 미치는 內果皮 및 Benzyladenine 의 影響
崔京求,金泰圭,柳南熙,張永男 전북대학교 농업과학기술연구소 1994 農大論文集 Vol.25 No.1
This study was carried out to check the effects of endocarp and benzyladenine on the after-ripening and germination of ginseng seed. The accelerating substance of germination was faintly traced at the Rf 1.0 in the extracts of whole seeds, but the inhibiting substances of germination increased with time. However, inhibiting substances decreased with time in the extracts of endocarps. The embryo percentage of the cleaved seeds was 20.7% , being higher than that of untreated seeds of 10.7% . Under the stratification treatment, the growth of embryo was more effective and the dehiscent percentage was also remarkably higher at alternative temperature than at constant temperature. Dried seeds showed germination percentage of 34% , showing the effect of dryness on the physiological dormant breaking, while physiological (formant seeds did not germinate. The effect of banzyladenine showed high germination percentage and germination speed in proportion to concentrations. The 200 ppm treatment showed high increase of 272% , being compared to the control.
崔京求,張永男,李成春 全北大學校 1985 論文集 Vol.27 No.-
The experiment was conducted to determine the change of meteorological ecotypes based on the photoperiod sensitive phase(PSP) and the basic vegetative phase(BVP) of rice varieties at different daylengths ranging from 10 to 16 hours with every two hours. Four groups of rice varieties were made on the basis of time of introduced and home bred: Native japonica(GⅠ), Japanese varieties introduced and improved between 1911 and 1940(GⅡ), Japanese varieties introduced and improved between 1941 and 1970(GⅢ), and Japanese varieties and Tongil semi-dwarf varieties released after 1970(GⅣ). Heading date of the four groups was delayed with increasing the daylength. With the time of introduction and home bred, the heading date tended to be delayed under short-day, but hastened under long-day. BVP of japonica varieties in the four groups decreased by degree by degree Ⅱ. The highest PSP was found in GⅠ, but the PSP decreased with time of introduction and home bred. Tongil varieties in GⅣ showed higher BVP and less sensitive in PSP than japonica varieties. In GⅡ and GⅢ PSP of home bred variety was significantly greater than that of introduced varieties, while there was no significant difference in BVP between them.
崔京求,金準采,張永男 전북대학교 농업과학기술연구소 1992 農大論文集 Vol.23 No.1
Effects of growth regulators, 2, 3, 5-triiodobenzoic acid(TIBA), abscisic acid(ABA)and 2·-chloroethylphosphonic acid(Ethrel) on growth and yield of soybean (Jangkyoungkong and Paldalkong ) were investigated at the different growth stages. The result were as follows ; Application of the growth regulators reduced stem length, but increased in stem diameter, number of nodes and seeds per plant, and yield. Out of three growth regulators, TIBA was most effective in growth and yield. Optimum treatment for growth was three- times spraying at the interval of 7days after 6-leaf stage of soybean plants. The highest soybean yield was obtained from three - times application of TIBA done after 6-leaf stage. Effects of the regulators was greater with Jangkyoungkong(indeterminate type) than with Paldalkong(determinate type) .