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생쥐 배의 배반포 형성과 세포수에 미치는 Glucose의 영향
박성백 ( Park Seong Baeg ),김지철 ( Kim Ji Cheol ),박기상 ( Park Gi Sang ),이택후 ( Lee Taeg Hu ),전상식 ( Jeon Sang Sig ),송해범 ( Song Hae Beom ) 대한산부인과학회 2004 Obstetrics & Gynecology Science Vol.47 No.4
Objective: Mammalian embryos undergo changes of energy environment for transfer from oviduct to uterus. An experimental design was used to examine the effects of glucose on the development in vitro of mouse embryos. Methods: Two cell embryos were recovere
석회암 골재를 사용한 콘크리트에 대한 비파괴 강도 평가연구
오병환 ( Oh¸ Byung-hwan ),강의영 ( Jiang¸ Yi-rong ),인광진 ( In¸ Kwang-jin ),김지철 ( Kim¸ Ji-cheol ),이승석 ( Lee¸ Seung-suk ) 한국구조물진단유지관리공학회 2000 한국구조물진단유지관리공학회 학술발표대회 논문집 Vol.4 No.2
The non-destructive tests are widely used to predict the strength of existing structures. However, the current prediction equations give no satisfactory results when the aggregate, water to cement ratio, ages of concrete are different. The purpose of the present study is to propose the prediction equations for strength evaluation of concrete with limestone aggregate focusing on the rebound method and ultrasonic pulse velocity method. The major test variables include water to cement ratio and curing methods. The water to cement ratios are 0.3, 0.4, 0.5, 0.6, 0.7 respectively and the curing methods cover air-dry condition and standard curing condition. The present study indicates that the test data and the proposed equations agree well with each other.