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노희삼,홍사용,류지욱,이춘우 공주대학교 기초과학연구소 2000 自然科學硏究 Vol.9 No.-
광연대 측정의 기본 원리와 몇 가지 응용을 기술하였다. 광 연대측정은 결정체의 결함이 외부 에너지원으로부터 자극을 받아 여기된 전자를 구속할 있으며 구속된 전자는 열이나 빛과 같은 외부 자극에 의해 바닥 상태로 전이되며 이 때 빛을 발생하는 원리를 이용한다. 광연대 측정은 몇 십년 단위부터 몇 십만년 단위의 연대 측정이 가능하며 고고학적 지질학적 연구에 적합하다. The basic theory of the luminescence dating and its applications is described. The optical dating utilizes that crystal defects can trap electrons excited by natural radioactivity and give luminescence when external stimulat'ion such as light and heat, is applied. The range of the optical dating is from a few decades to hundreds of thousand years, which is useful for both archeological and geological dating. There are some commercially available systems, which automate the measurements.
이희삼(Heui-Sam Lee),김선여(Sun-Yeou Kim),이완주(Won-Chu Lee),이상덕(Sang-Duk Lee),문재유(Jae-Yu Moon),류강선(Kang-Sun Ryu) 한국식품영양과학회 2000 한국식품영양과학회지 Vol.29 No.5
흰쥐에게 뽕잎을 4주동안 투여하여 장기능에 미치는 영향을 알아본 결과, 사료이용효율은 10% 투여구에서 14% 감소되었고, 장 통과시간은 1% 투여구에서 16%, 10% 투여구에서 21% 빨라졌다. 장의 길이는 1% 투여구에서 10%, 10% 투여구에서 11% 증가되었고, 장 통과속도는 1% 투여구에서 30%, 10% 투여구에서 40% 빨라졌다. 변의 pH는 대조구가 6.91인데 비해 1% 투여구는 6.07, 10% 투여구는 5.95로서 뽕잎 투여량이 증가함에 따라 변의 pH는 점차 낮아졌다. 변량은 1% 투여구에서 57%, 10% 투여구에서 91% 증가되었다. 변중의 무기성분 중에서 K의 함량이 50% 증가하였으나, 이는 뽕잎 중에 K함량이 많기 때문으로 생각된다. This experiment was carried out to investigate the effects of dietary mulberry leaf powder on gastrointestinal function of rats. Plot containing one and ten percent mulberry leaf powder was supplied with rats. The food efficiency ratio (FER) of rat fed with 10% mulberry leaf powder was decreased 14%. The transit time of rat fed with 1% and 10% mulberry leaf was faster 16% and 21% than that of control respectively. Intestine length was increased 10% and 11% at 1% and 10% dietary mulberry leaf respectively. The transit speed was faster 30% at 1% dieatry mulberry leaf than that of control. The pH of rat's feces suplied with mulberry leaf was lower than that of control. The amount of daily rat's feces fed mulberry leaf was much than that of control. As above results, we suggest that mulberry leaf was evaluated to improve the function of rat's gastrointestine.
Cytarabine 으로 유도된 탈모증에 대한 상백피 추출물의 육모촉진 효과
이희삼(Heui Sam Lee),문재유(Jae Yu Moon) 대한약학회 2000 약학회지 Vol.44 No.1
This study was designed to examine the effect of Mori cortex radicis extract on cytarabine induced alopecia in young rat. cytarabine (50mg/kg) was injected to Eight-day-old rats everyday for 7 days. After the injection, Mori cortex radicis extract was spread on the alopecia young rats for 12 days topically. The stimulative effect of hair growth was observed on 12th day of topical application. The stimulative effect of hair growth was best in MEOH extract group. And the same result was obtained in the experiment of hair follicle cross section.