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원목(原木), 병재배(甁栽培) 및 야생(野生) 영지(靈芝)의 추출물이 Saccharomyces cerevisiae의 생리에 미치는 영향
주현규,하승수,김성조,이중근,김형근,Joo, Hyun-Kyu,Ha, Seung-Soo,Kim, Seong-Jo,Lee, Joong-Keun,Kim, Hyeong-Keun 한국응용생명화학회 1987 한국농화학회지 Vol.30 No.1
영지(靈芝(Ganoderma lucidum(Fr.) Karst)) 추출물이 효모(Saccharomyces cerevisiae)의 증식과 생리에 미치는 영향을 검토하기 위하여 재배별 영지추출물을 각각 0, 0.1, 0.5, 1.0% 첨가한 Hayduck 액 배지에 효모를 접종하여 5일간 $30^{\circ}C$에서 발효시키면서 $CO_2$ 발생량, 균체생산, alcohol 발효 등을 조사하였다. 발효과정중 효모의 $CO_2$ 발생량은 발효 120시간 경과후 영지추출물 첨가구에서 모두 대조구보다 증가하였으며 이들 중 병재배 영지추출물 1.0% 첨가구에서 $CO_2$발생량이 가장 많았다. 발효과정중 효모의 세포수는 영지추출물 첨가구의 경우 모두 대조구보다 증가하였으며 병재배 영지추출물 첨가구가 원목영지추출물 및 야생영지추출물보다 세포수가 많았다. 효모의 건조균체량은 pot 0.5%구(區)>Pot 1.0%구(區) wild 1.0%구(區)>wood 1.0%구(區)>wood 0.5%구(區)>wild 0.5% 구(區)>wild 0.1% 구(區)>Pot 0.1% 구(區)> wood 0. 1% 구(區)>대조구의 순서로 증가하였으며 병재배영지추출물 첨가구는 원목재배나 야생영지추출물 첨가구보다 많았다. 각 처리구의 alcohol 함량은 발효 72시간의 경우 영지추출물 첨가구는 모두 대조구보다 3배 이상으로 많았으나 120시간 발효 후에는 큰 차이가 없었다. 발효과정중 효모의 당소비율과 발효율은 발효초기에 영지추출물 첨가구가 대조구보다 현저히 높았으나, 그 후 시간이 경과함에 따라 비슷하게 나타났다. This study has been investigated the effect of Ganordema lucidum extract on Saccharomyces cerevisiae growth and physiology. Sacch. cerevisiae was inoculated in Hayduck solution medium which were added 0, 0.1, 0.5, 1.0% extracts of G. lucidum and fermented at $30^{\circ}C$ for 5 days respectively. Some results about cell number, alcohol content and carbon dioxide products during fermentation are as follows: $CO_2$ evolution of yeasts by addition of extract of G. lucidum was more increased than control after the fermentation for 120 hours. It was the most abundant by addition of 1.0% extract of pot-culture G. lucidum. The cell number of yeasts during the fermentation w as more increased than control by addition of extract of G. lucidum. It was by addition of extract of pot-culture G. lucidum that the cell number of yeasts was more increased than by each addition of extract of wood-culture G. lucidum and G. lucidum. Dry weight of yeasts was systematically increased in addition of extract of pot 0.5%>pot 1.0%>wild 1.0%>wood 1.0%=wood 0.5%>wild 0.5%>wild 0.1%>pot 0.1%>wood 0.1%>control in order. It was by addition of extract of pot-culture G. lucidum that. the dry weight of yeasts was more increased than by addition of woodculture G. lucidum and wild G. lucidum. Alcohol quantity by addition of extract of G. lucidum was increased more than 3 times after the fermentation for 72 hours compared with control but there was no any difference among them after the fermentation for 120 hours. The rate of sugar-consumption and fermentation of yeast by addition of extract of G. lucidum was highly increased during the early fermentation. As times went, there was no difference among them during the subsequent fermentation.
열처리가 결명자의 화학성분 변화 및 추출물의 균체증식에 미치는 영향
주현규,윤종범,김경구,사동민,이영택 ( Hyun Kyu Joo,Jong Gum Yun,Kyeong Gu Kim,Tong Min Sa,Young Tack Lee ) 한국응용생명화학회 1997 Applied Biological Chemistry (Appl Biol Chem) Vol.40 No.6
The effects of roasting Cassia tora L. were investigated for proximate composition, color, volatile flavor profile, microbial growth and alcohol fermentation. While moisture, protein and fat contents decreased with increasing roasting temperature, fiber and ash contents increased. The L, a and b values of Cassia tora L. extracts decreased with increasing temperature, and only a small difference in total color difference(ΔE) was observed. A little difference in major flavor components between raw and roasted treatment was found during roasting. Furfuryl alcohol, a major component of coffee flavor, was separated from Cassia tora L. extracts extracted with ethyl ether. The yeast growth was the highest on the water-extract of Cassia tora L. roasted at 160℃. With increased levels of water-extract at 160℃, S. cerevisiae grew rapidly for 24 hr incubation and the growth rate was higher than the unroasted control group. The growth rate of Bacillus subtilis was the highest in a theatment of 0.5% concentration. Little differences in α-amylase produced from Bacillus subtilis were observed among the treatment groups. The total alcohol content increased with increasing roasting temperature during alcohol fermentation.
Sr이 치환된 Rosen 타입 압전변압기의 전기적 특성
주현규(Hyeonkyu Joo),김인성(Insung Kim),정순종(Soonjong Jeong),김민수(Minsoo Kim),송재성(Jaesung Song),이대수(Daesoo Lee),전소현(Sohyeon Jeon) 대한전기학회 2009 대한전기학회 학술대회 논문집 Vol.2009 No.7
Recently, piezoelectric transformer is applied to wide fields. Multi layer piezoelectric transformer has the advantage of high step up ratio, high electromechanical coupling coefficient(Kp) and high mechanical quality factor(Qm), however it shows the peeling-phenomenon of electrode, and high price due to high sintering temperature. Therefore this study focus on the method for fabrication of high power rosen type piezoelectric transformers.