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Hyaluronidase, Dimethylsulfoxide, Actovegin이 白鼠 皮膚瓣 生存에 미치는 效果에 대한 實驗的 硏究
柳在萬,鄭淳孝 한양대학교 의과대학 1985 한양의대 학술지 Vol.5 No.1
Delay procedure has been used in reconstructive surgery for the prevention of flap necrosis and the augmentation of flap survival. Concerning the delay mechanism, numerous experiments have suggested various hypotheses. Recently, Finseth proposed a new vasodilatation hypotheses, based on the prolonged vascular smooth muscle relaxation in thepprecapillary arterioled to which several factors contribute such as sympathectomy, tissue ischemia and inflammatory reaction. Since then many authors attempted to improve flap survival with pharmacological treatment. The study was conducted to reveal the effect of hyaluronidase, Actovegin and dimethyl sulfoxide on the survival of the random pattern flap in experimental rats. The results were summarized as follows. 1. The mean length of the flap survival was 4.4Cm for the control and 6.7Cm for the flap treated with Dimethylsufoxide. 2. There was no significant difference between the DMSO-treated, Hyaluronidase treated and Actovegin treated animals.
안기원,박정선,서순팔,문재동,조진형 大韓産業醫學會 1998 대한직업환경의학회지 Vol.10 No.1
In order to evaluate the genotoxic hazard among workers potentially exposed to low level petrochemical substances, the analyses of micronuclei(MN) and sister chromatid exchanges(SCEs) in lymphocytes were performed in 46 male workers(as exposed group) and 46 nonexposed subjects(as control group). Mean frequencies of MN and SCEs(respectively, 12.9/1000 cells and 6.5/cell) in exposed group were very significantly higher than those(10.2/1000 cells and 5.4/cell) in control group. And there were also significant differences in mean frequencies of MN and SCEs adjusted for age, employment duration, smoking, and drinking between two groups. Median frequencies of MN and SCEs in exposed group were very significantly higher than those in control group. Frequencies of SCEs were higher in smokers than in non-smoker. Frequencies of MN in smokers, however, were similiar to those of non-smoker. Interaction between exposure and smoking on MN and SCEs induction was not observed. The results suggest that there is genotoxic hazard in high risk group like workers handling carcinogens in petrochemical plants and the analyses of MN and SCEs are useful biomarkers for the exposure to hazard substances even at the level below the exposure limit.
안영진,이승호,강신정,황방연,박웅양,안병태,노재섭,이경순 영남대학교 약품개발연구소 1996 영남대학교 약품개발연구소 연구업적집 Vol.6 No.-
A chemical examination of the phenolic compounds in the leaves of Sapium japonicum (Euphorbiaceae) has led to the isolation of eleven phenolic compounds. containing five hydrolysable tannins and six flavonoids. On the basis of chemical and spectroscopic evidences, the structures of these compounds were confirmed to be galic acid(1), 5-O-caffeoyl quinic acid(2), 1-O-galloyl-3, 6-(R)-HHDP-β-n-glucose(coriiagin)(3), 1-O-galloyl-2.4-(R)-DHHDP-βn-glucose (furosin)(4), 1-O-galloyl-2.4-(R)-DHHDP-3.6-(R)-HHDP-β-m-glucose(geraniin)(5), astragalin(6), trifolin(7), afzelin(8), quercetin(9), isoquercitrin(10) and rutin(11). Among them geraniin was the main component.
Tae-Hong Park,Kyunghun Jung,Kanghyun Yoo,Kwang Eun Lee,Shinkyoung Lee,Simon Oh,Gi Yong Kim,Kwang-Soon Choi,Jung-Weon Choi,Yang-Soon Park,Hyeju Lee,Minyoung Jung,Jung Bo Yoo,Jai Il Park 한국방사성폐기물학회 2023 한국방사성폐기물학회 학술논문요약집 Vol.21 No.2
Alpha activities can be used for categorization, transportation, and disposal of radioactive waste generated from the operation of nuclear facilities including nuclear power plants. In order to transport and dispose of such low- and intermediate-level radioactive waste (LILW) to the Wolsong LILW Disposal Center (WLDC) at Gyeongju, the gross alpha concentration of an individual drum should be determined according to the acceptance criteria. In addition, when the gross alpha concentration exceeds 10 Bq/g, the inventory of the comprising alpha emitters in the waste is to be identified. Gross alpha measurements using a proportional counter are usually straightforward, inexpensive, and high-throughput, so they are broadly used to assay the total alpha activity for environmental, health physics, and emergency-response assessments. However, several factors are thoughtfully considered to obtain a reliable approximate for the entire alpha emitters in a sample, which include the alpha particle energy of a particular radionuclide, the radionuclide that is used as a calibration standard, the uniformity of film in a planchet, time between sample collection and sample preparation, and time between sample preparation and counting. Korea Atomic Energy Research Institute (KAERI) have evaluated the inventory of radionuclides in low-level radioactive waste drums to send every year hundreds of them to the WLDC. In this presentation, we revisit the gross alpha measurement results of the drums transported to WLDC in the past few years and compare them with the concentrations of alpha emitters measured from alpha spectrometry and gamma spectrometry. This study offers an insight into the gross alpha measurement for radioactive waste regarding calibration source, self-absorption effect, composition of alpha emitters, etc.