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Chu, Kwang Moon,Han, Du Seok 원광대학교 치의학연구소 2001 圓光齒醫學 Vol.10 No.2
본 연구는 독성에 의한 부작용이 적고 항암작용이 강한 물질을 개발하기 위하여 수행되었다 카나비디올을 포타시움 카보네이트 촉매존계에서 디베델포름아마이드 용매를 넣고 메틸아이오다이드를 첨가하여 12시간이 지난 후에 카나비디올 모노메틸 에테르와 카나비디올 디메틸 에테르을 합성하였다. 카나비디올 유도체와, 아드리아마이신의 인체 피부혹색종세포에 대한 성장억제효과를 3-(4,5-dimethylthiazol2-yl)-2,5-diphenyl-2H-tetrazolium bromide (MIT) 분석법과 sulforhodamine B potein (SRB) 분석법을 사용하여 평가하였다. 이들 화합물 (11, 20, 21과 19)은 마이크로 몰 농도의 범위 (1 - 100μM)에서 억제활성을 나타내었다. 인체 피부혹색종세포에 대한 이들 화합물의 50 % 억제 농도효과에 대한 비교결과 AM > CBD . CBDMA > CBDDM의 순서로 항암활성이 나타났다. 카나비디올 유도체 (11, 20과 21)와 아드리아마이신 (19)의 NIH373 세포에 대한 세포독성효과는 마이크로 몰 농도의 농도범위에서 투여량 의존성을 보였다 NIT373 세포에 대한 이들 화합물의 50 % 세포독성은 AM . CBD . CBDDM . CBDMA의 순서로 확인되었다. 합성된 카나바디올 에틸에테르 유도체의 인체 피부혹색종세포에 대한 성장 억제 및 NIT373 세포에 대한 세포독성 조사 결과, 이들 유도체는 피부암 치료를 위한 항암제로서의 임상적 활용 가능성이 시사되었다.
Kwang Ho Yang,Je Ho Ryu,Ki Myung Moon,Chong Woo Chu 대한외과학회 2012 Annals of Surgical Treatment and Research(ASRT) Vol.82 No.2
A 54-year-old man was transferred with sigmoid colon cancer combined with multiple bilobar liver metastases. Nine metastases were in the left lobe and 5 metastases were in the right lobe. After low anterior resection, all 9 lesions in the left lobe were completely removed by wedge resections. Because the remnant liver volume after multiple wedge resection of the left lobe was not sufficient to perform a right hepatectomy simultaneously, we planned a two-stage hepatectomy. Right portal vein embolization was performed one week after the first liver operation. A right hepatectomy was safely performed 22 days after the first hepatectomy. A recurrent mass developed in the segment III 18 months after the right hepatectomy. Radiofrequency ablation (RFA) was performed to remove that lesion. Five other metastases developed 18 months after RFA whereby multiple wedge resections were performed. The patient has survived for more than 7 years after the first liver operation.
치경부의 상아세관을 통하여 누출된 표백제가 배양 섬유모세포에 미치는 영향에 관한 연구
추광문,한두석,최기운 원광대학교 치의학연구소 1991 圓光齒醫學 Vol.1 No.2
The purpose of this study was to evaluate the effects of bleaching agent through the dentinal tubules of cervical area in the intracoronal bleaching of pulpless teeth on cultured fibroblast cells. Extracted human incisors were enlarged to # 40 K-file and obturated with gutta-percha and AH 26 sealer. The gutta-percha was removed to 2㎜ below the cementoenamel junction of the root. The teeth were divided into 3 experimental and control groups. Experimental groups Experimental group 1 : Temporary inlay wax filled with 30% H_2O_2 in pulp cavity. Experimental group 2 : Temporary inlay wax filled with 30% H_2O_2 in pulp cavity after placement of ZOE cement to cementoenamel junction. Experimental group 3 : Temporary inlay wax filled with 30% H_2O_2 in pulp cavity after application of Copalite to cementoenamel junction. Control group : Temporary inlay wax filled without 30% H_2O_2 in pulp cavity under the same condition at each experimental group. Each tooth was immersed in well of multidish cultured fibroblast cell for 48 hours. The cellular multiplication and cell viability were calculated at the interval of 1, 3, 5, 7 hours and the morphological changes in well were observed and their photographs were taken with inverted microscope The obtained results were as follows (1) The cellurar multiplicaton and cell viability decreased in all experimental groups at 1 hour after experiment and the morphology of fibroblast cell was changed from star shape to round. (2) The cell viability was lowered to 34% in experemental group 1, 44% in experimental group 2, and 38% in experemental group 3 at 3 hours after experiment. (3) The cell multiplication was decreased to 54% in experemental group 1, 47% in experemental group 2, and 40% in experemental group 3 at 7 hours after experiment. (4) The decrease of cell number and morphological changes of fibroblast cell were remarkable in experimental group 1, group 3 and 2 in order. These results suggest that the fibroblast cells receive severe damage by 30% H_2O_2 solution leaked through the dentinal tubules and the dentinal tubules be able to be obturated better by ZOE cement than by Copalite.
Fish Community and Habitat Environmental Characteristics in the Gudam Wetland
Chu, Yeounsu,Cho, Kwang-Jin,Kim, Hui-Seong,Moon, Ho-Gyeong,Kim, Han,Choi, Nak-Hyun National Institute of Ecology 2022 국립생태원회보(PNIE) Vol.3 No.1
In this study, we investigated the water quality and fish community of the Gudam Wetland, a riverine wetland in the middle-upper reaches of the Nakdong River, during March-October 2020. The main results were as follows: average annual flow rate: 45.0±23.7 m<sup>3</sup>/s, flow velocity: 0.4±0.3 m/s, water depth: 1.4±0.4 m, water temperature: 17.5±0.8℃, pH: 7.8±0.2, electrical conductivity: 121.6±19.0 ㎲/cm, dissolved oxygen concentration: 11.4±0.9 mg/L, suspended solids concentration: 3.8±2.0 mg/L, and the water quality was classified as Ia (very good). A total of 754 individual fish belonging to 4 orders, 7 families, and 19 species were investigated. Cyprinidae was the dominant group, with 13 species. The dominant species was Zacco platypus (39.3%), followed by Pseudogobio esocinus (17.5%). There were 8 (42.1%) endemic Korean species and 1 exotic species, Micropterus salmoides. Four species were carnivores, six were insectivores, and nine were omnivores. Regarding tolerance to environmental changes, 6 species were tolerant, 11 had intermediate tolerance, and 2 were sensitive. Fish community analysis revealed dominance of 0.57, diversity of 2.04, evenness of 0.69, and richness of 2.72, indicating a diverse and stable fish community. The fish assessment index showed that the assessment class was B (average 62.5), which was higher than that of major streams of the Nakdong River (class C). For sustainable conservation of the Gudam Wetland, management strategies such as minimizing aggregate collection and preventing inflow of non-point pollutants are required.