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세라믹 막을 이용한 Lactobacillus 균주의 농축공정에 관한 연구
송민호,이용택 경희대학교 산학협력기술연구원 2001 산학협력기술연구논문집 Vol.7 No.-
It is an anaerobic germ that Lactobacillus cell concentrated using ceramic membrane has high stability and long lifetime as compared with polymeric membrane. The effects of operating pressure, temperature, crossflow velocity on cell harvesting have been studied. Also the variation of flux and transmembrane pressure(TMP) with increasing concentration ratio and the change of TMP at constant concentration ratio (volumetric concentration factor : VCF) regarding the optimization have been examined. It showed that the permeate flux increased gradually with the increasing of transmembrane pressure, crossflow velocity, and volumetric concentration factor. The higher initial flux was due to the reduction of viscosity at elevated temperature. However, as operating time progressed, the effect of temperature was negligible since the effect of viscosity became minor. As a result that operate in a constant concentration ratio, decreased degree could know that become slowly although the flux decreases according as operating time progressed. The flux is a very stable in the condition of constant VCF range. The yield of Lactobacillus (PS 406) which was cultivated at 37 ℃ was concentrated about 4.9×109 after operation.
宋承達,李容夏,鄭三澤,黃正儀 慶北大學校 1974 論文集 Vol.18 No.-
Effects of coal powder on the apple productivity were investigated from the plant eco-physiological point of view. 1) Light absorption by the dispersion of 10, 30 and 50g/㎡ of 54μ meshed coal powder was 42, 82 and 94% of the incident light, respectively. 2) Leaf area index of the coal treated apple tree on June (nearly maximum) was slightly larger than that of the control plant, i.e., 4.5-5.0 for Jonathan and 5.5-6.0 for Rolls Janet. Relative light intensity under this apple leaf population declined to 3.4-2.4% on June 26, 1974. 3) Application of coal powder on apple tree resulted in an increase of specific leaf area. 4) Assimilation rate measured by the half leaf method showed a decreased rate in the treated leaf. 5) Transpiration rate decreased by 9.6% on the coal powdered leaf. 6) Surplus photosynthesis of the apple leaf population was 31.1-32.7g/㎡/day from the estimation by the formula of Monsi-Saeki. 7) Growth rate of fruit diameter and shoot length showed the obstructive effect of coal treated apple tree. 8) Rate of June drop of the coal treated apple (50g/㎡) increased 11.0-15.7% as compared with that of the control plant.
보이드 생성기구에 의한 복합조직강의 연성 파괴거동에 관한 연구
吳澤烈,崔明振,楡龍錫,金松正 慶熙大學校 材料科學技術硏究所 1993 材料科學技術硏究論集 Vol.6 No.-
Ductile Fracture of Dual Pase Steel begins with void nucleation, at Martensite-Ferrite interface or deformed Martensite particle. In this study void nucleation, void growth, void volume fraction and void coalescence at given strain were studied in dual phase steel. Therefore, by means of the heat treatment of low corbon steel the study deal with void nucleation and void growth for ferrite grain sizeof dual phase steel. Void nucleaton and void growth with increasing strain are shown depend upon the ferrit grain size. The number of voids and volume fraction of voids generary increase as ferrite grain size decrease. At the close to fracture the void coalescence in the direction of the applied tensile stress, but near the fracture surface they linked in direction transverse to the tensile axis.
朴庸奉,宋昌訓,韓元琢,金基澤 제주대학교 1991 논문집 Vol.32 No.-
濟州地域 겨울감자 栽培用 種薯 自給率 向上을 위하여 가을감자에 GA處理로 早期休眼打破 效果를 규명코저 3個年間의 試驗結果를 報告한다. 1) 定植時 萌芽長은 慣行區에 比하여 濟州産에 GA處理한 것은 萌芽長이 짧았으나 處理濃度가 높을수록 增加하였다. 2) 出現期는 慣行定植區에 比하여 濟州産 GA處理한 것은 11∼16日程度 늦었으나 無處理區 보다는 13∼18일 정도 빠른편이었다. 3) 草長은 GA處理한 것이 慣行區와 濟州産無處理區보다 길었으나 生育中에 草勢가 軟弱하여 低溫伸長性이 弱한 편이었다. 4) 收量은 GA 4ppm 處利한 것이 無處理보다 128% 增收하는 편이었으나 慣行區보다는 18% 程度 減收하는 傾向을 나타내었다. 以上의 結果로 보아 濟州地域 겨울감자 栽培用 種薯가 大關嶺 9月産으로 全量 確保가 어려울 경우 不足한 것은 濟州가을감자에 GA 4ppm을 30分동안 處理하면 겨울감자 栽培用 種薯로 利用이 可能할것으로 판단되었다 Influence of Gibberellin treatment on growth and yields of potatoes (Solanium tuberosum L.) were examined. The results obtained are summarized as follows; 1) The sprout lengths were decreased by the GA treatment more than usual (the produced in September at alpine level). However, it appeared there was a trend of increase, as related to higher GA concentration. 2) The days to emergence were late in the GA treatment more than the usual degree of 11-16 days. It was earlier than the control of 13-18 days. 3) Plant heights were longer by GA treatment than those of usual practices and of the control. However, during the early growing stage, it shows that low temperature resitance was a trend of weakness. 4) In accordance with the rise in concentration of GA treatment, yields were increased by GA 4ppm treatment about 128% more than by the conreol. On the contrary, GA 4ppm treatment showed a trend of decrease, about 18% less than the usual practice. According to these results, it is possible to use the planting seed of winter cultivated potatoes, if we treated GA 4ppm, for 30 minutes to the control.
강도별 운동 전·후 혈청 LDH, 및 CK의 활성도 변화
임용택,송분도,이충영,박명수 한국스포츠리서치 2005 한국 스포츠 리서치 Vol.16 No.2
The purpose of this study was to investigate the changes of Creatine Kinase(CK) and Lactate Dehydrogenase(LDH) activity following different exercise intensities. Each subject(N=G) performed 30min's running with different exercise intensities- 10% VO₂max, 60%VO₂max, 80VO₂max - using treadmill. To measure the blood concentration of CK and LDH, we collected blood three times - pre-exercise, post-exercise and 30min after cessation of exercise. Using this experimental method. following results were obtained; First, There was significant difference between pre- and post-exercise CK concentration in 40%VO₂max exercise group and 60%VO₂max exercise group(p<.05), but no significant difference in 80%VO₂max exercise group. Second, There was no significant difference between pre- and post-exercise LDH concentration in 40%VO₂max exercise group and 60%VO₂max exercise group. but significant difference in 80%VO₂max exercise group. This result suggested that the concentration of CK and LDH following exercise depend on exercise intensities.