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YHB6211(recombinant human granulocyte-colony stimulating factor)의 토끼에서 국소자극성에 관한연구
최연식(Yeon Shik Choi),안경규(Kyoung Kyu Ahn),전재현(Jae Hyeon Juhn),이종성(Jong Sung Lee),문병석(Byoung Seok Moon),유광현(Kwang Hyun You) 한국독성학회 1999 Toxicological Research Vol.15 No.2
Local irritation of YHB6211, a recombinant human granulocyte-colony stimulating factor, was assessed in male New Zealand White (NZW) rabbits by dermal and ocular application. In the skin irritation test, 0.5 ml of 0.03% YHB6211 aqueous solution was applied to the back skin of rabbits for 24 hours, and subsequent observation was performed. The solution did not induce any response after the treatment, and the primary irritation index (P.I.I.) of the compound was 0. In the eye irritation test, 0.1 ml of the same solution was instilled into the conjunctiva of the eye. No treatment related reactions were observed at the cornea, iris, and conjunctiva. Based on these results, 0.03% (w/v) YHB6211 solution could be considered as a non-irritating material.
최연식(Yeon-Shik Choi),이동현(Dong-Hyun Lee) 산업기술교육훈련학회 2016 산업기술연구논문지 (JITR) Vol.21 No.4
Aging is a natural phenomenon on living life. There are a variety of factors influencing aging, free radical, wear, genetic unbalance, autoimmune, mutation, accumulation and programmed cell death etc. It was studied that many method are able to delay for aging such as biochemical anti-oxidant, food restriction. Finally, restriction of aging process is important role to improve quality of life for extending human life.
Vitamin E가 철분 투여로 인한 rat의 지질 과산화에 미치는 영향
허린수,김영홍,도재철,최연식,정정원,Huh, Rhin-sou,Kim, Young-hong,Do, Jae-cheul,Choi, Yeon-shik,Cheong, Cheong-won 대한수의학회 1991 大韓獸醫學會誌 Vol.31 No.3
This study was designed to investigate the effect of dietary vitamin E on the lipid peroxidation by dietary iron-injected to male rats. Sprague-Dawely strain male rats were divided into three experimental groups, namely control, iron injected and iron-vitamin E injected groups. The control group was fed with normal diet; the iron injected group was given normal diet and while injected intraperitoneally 30mg of ferric hydroxide/100g of body weight 20 times every 3 days. The iron-vitamin E injected group was intraperitoneally administered 30mg of ferric hydroxide/100g of body weight 20 times every 3 days and vitamin E every day with the dose of 5IU(5mg)/100g body weight. All experimental groups were maintained for 60 days with feeding on the respective ratio. The results obtained from this experiment were summarized as following: 1. The net weight gain was significantly decreased by the iron injection, but much increased by the vitamin E injection. 2. The contents of unsaturated fatty acid in phospholipid in liver, kidney, muscle and serum were decreased by the iron injection, but increased by the vitamin E injection. 3. The increment of malondialdehyde contents was induced by the iron overloading, but significantly decreased by the vitamin E injection. Therefore, it is suggested that dietary iron administration to male rats facilitates the lipid peroxidation in vivo and vitamin E has the inhibiting effect on lipip peroxidation process by iron.
Rat에 있어서 탈지사료 및 철분투여가 다불포화 지방산, vitamin E 및 그 유도체에 미치는 영향
허린수,김영홍,김성훈,도재철,이영호,최연식,Huh, Rhin-sou,Kim, Young-hong,Kim, Sung-hoon,Do, Jae-cheul,Lee, Young-ho,Choi, Yeon-shik 대한수의학회 1990 大韓獸醫學會誌 Vol.30 No.4
This study was designed to elucidate the effects of administration with dietary iron and fat-free diet on the contents of unsaturated fatty acid in phospholipid molecules, vitamin E contents and malondialdehyde contents in liver, kidney, muscle and testis of the male rats. The rats were divided into 3 experimental groups, namely, control, iron injection and fat-free diet administration groups. The control group was fed with normal diet, iron injection group injected intraperitoneally 20mg of ferric hydroxide/100g of body weight 20 times every 3 days and fat-free diet group administered lipid extraction diet with hexane in normal diet. All experimental groups were maintained for 60 days with feeding on the respective ration. The results obtained were summarized as follows: 1. In the mean contents of unsaturated fatty acid in phospholipid of liver, kidney, muscle and testis among groups, control group was 21.31mg/g, 19.38mg/g, 1.67mg/g, 13.68mg/g, iron injection group was 13.83mg/g, 16.53mg/g, 0.71mg/g, 10.11mg/g and fat-free diet group was 21.07mg/g, 19.38mg/g, 1.49mg/g and 13.40mg/g, respectively. 2. In the mean contents of vitamin E in liver, kidney, muscle and testis among groups, control group was 6.77mg/g, 1.93mg/g, 0.12mg/g, 0.17mg/g, iron injection group was 3.16mg/g, 0.86mg/g, 0.07mg/g, 0.09mg/g and fat-free diet group was 7.41mg/g, 1.50mg/g, 0.11mg/g and 0.16mg/g, respectively. 3. In the mean contents of malondialdehyde in liver, kidney, muscle, testis and serum among groups, control group was 11.29nM/0.1g, 23.25nM/0.1g, 42.47nM/0.1g, 7.01nM/0.1g, 4.33nM/ml, iron injection group was 34.98nM/0.1g, 40.55nM/0.1g, 72.21nM/0.1g, 12.26nM/0.1g, 11.27nM/ml and fat-free diet group was 8.07nM/0.1g, 20.63nM/0.1g, 39.92nM/0.1g, 6.95nM/0.1g and 4.27nM/ml, respectively.
피부 광학 기반의 새로운 생체 인증 기술을 위한 1차원 MSP 모듈 Prototype 개발
김해나(Hae-Na Kim),홍혁기(Hyuck-Ki Hong),최연식(Yeon-Shik Choi),조영창(Young-Chang Jo),김동현(Dong-Hyun Kim) 대한전자공학회 2015 대한전자공학회 학술대회 Vol.2015 No.11
This paper investigates the possibility of MSP(Multi-spectral Skin Photometrics) as a novel biometric technology to facilitate automatic identification of individuals. MSP using transmission and diffuse reflection difference with variable wavelength provides information about both the surface and subsurface characteristics of the skin tissue. It is found in this paper that 8 people have their unique patterns each other under the same wavelength. Personal difference of skin tissue components concentration and anatomical characteristics measured by multi spectral light offers possibility of MSP as more enhanced biometric technology.
정찬희(Chan Hee Jeong),황원희(Won Hee Hwang),홍혁기(Hyuck Ki Hong),최연식(Yeon Shik Choi),조영창(Young Chang Jo) 대한전자공학회 2023 대한전자공학회 학술대회 Vol.2023 No.6
This paper studied the difference between brain waves and pulse waves according to various sound sources. An experiment was conducted to find out the difference between the brain wave and the pulse wave according to the frequency of the sound source and to find out the relationship. As a result, although there are differences depending on the person, the result showed that the sound source with a lot of low frequencies maintains relatively more stability than the sound source with a lot of high frequencies.