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구인이 콜레스테롤 식이 Rat의 지질함량 변동에 미치는 영향
윤수홍,김병학 대구효성가톨릭대학교 1997 연구논문집 Vol.55 No.2
The purpose of this study was to investigate the effect of Lumbricus rubellus on lipid contents in cholesterol fed rats. The powder of Lumbricus rubelus and its water extract were obtained and administrated to rats. The effects of the powder and its water extract of Lumbricus rubellus on lipid contents in serum and liver of cholesterol fed rats were examined. As parameters in serum and liver, total lipid, triglyceride and cholesterol(total, HDL, LDL) contents were observed. The results were as follows: Total lipid, triglyceride, total cholesterol and LDL-cholesterol contents in serum and liver were increased by administration of cholesterol, but they were significantly decreased by administrations of Lumbricus rubellus powder and its water extract. But HDL-cholesterol content in serum by administration of cholesterol was not changed and arteriosclerotic index was increased almost twice in cholesterol fed group than in other groups. Taken together, the administrations of Lumbricus rubellu powder and its water extract significantly decreased lipid contents in serum and liver. Therefore, it could be suggested that Lumbricus rubellus might be promising agents in a circulatory disorder including arteriosclerosis.
On warped product spaces with a certain Ricci condition
김병학,이상덕,최진혁,이영옥 대한수학회 2013 대한수학회보 Vol.50 No.5
In this paper, we obtain the criteria that the Riemannian manifold B is Einstein or a gradient Ricci soliton from the information of the second derivative of f in the warped product space R ×f B with gradient Ricci solitons. Moreover, we construct new examples of non- Einstein gradient Ricci soliton spaces with an Einstein or non-Einstein gradient Ricci soliton leaf using our main theorems. Finally we also get analogous criteria for the Lorentzian version.