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자두 추출물을 이용한 미용비누 제조 및 여드름 환자에 대한 효과
한만덕 ; 윤옥현 ; 박동철 ; 박지원 김천대학교 2003 김천대학교 논문집 Vol.24 No.-
In this study, authors investigated the bathroom soap development using plum(Prunus salicina Lindl. cv. Soldam) extracts and studied the effects and safety of a plum soap on acne patients. For obtaining antibacterial material from dried plum, the serial extraction using organic solvent was carried out and gained of 0.2% hexane, 0.2% chloroform, 0.23% ethyl acetate, 9.8% butanol and 2.1% water extracts. The main bioactive contents of the soap were consisted of 0.006% plum extract, 0.1% glycyrrhiza extract, and 0.15% tocopheryl acetate. A clinical study of soap containg 0.006% plum extracts was carried out on three groups of people: a treatment and 2 control groups on acne patients. Efficacy and safety were assessed at baseline and at one month later. The group applving the soạp with plum extract felt better than the one applying the 2 control group. Some patients developed mild and transient local side effects. The plum soap didn't change at 40℃ and was 130 hardness. In conclusion, cleansing three times a day with a facial soap consisting 0.006% ethyl acetate extract of plum was found to be effective and safe for patients suffering from acne vulgaris
한정식,서만철 공주대학교 문화재보존과학연구소 2003 문화재과학기술 Vol.2 No.1
산청군 생비량면 도전리의 마애불상군을 대상으로 사진을 이용한 3D Modeling의 원리 및 제작 방법에 대해서 알아보고 이를 이용한 문화재 보존 및 원형유지를 위한 방법을 논의하였다. Review the principle and manufactured methods of 3D Modeling use a photograph about Dojeonri Rock Cliff Buddha in the Sancheong. Then search for it's methods for maintenance of original form and preservation of cultural properties.
강현삼,이한형,박기철,김건한,서만철,서정호,최기영 공주대학교 문화재보존과학연구소 2003 문화재과학기술 Vol.2 No.1
전북 부안 유천리 청자요지에서 수습된 청자편 11점의 태토 및 유약에 대하여 화학조성을 분석하고, 기 발표되어진 문헌의 청자데이터들을 종합하여, 이와 비교함으로써 본 시료의 도자특성과 및 산지에 대한 정보를 유추하였다. 태토의 주요산화물 분석에는 XRF를 이용하였으며, 유약의 주요산화물분석에는 EPMA를 이용하였다. 태토 중 17개 미량성분의 분석에는 ICP-MS를 이용하였고, 자료의 비교분석에는 Seger식에 의한 방법과 주성분분석법에 의한 통계처리방법을 병행하였다. 태토의 주요산화물에 대한 비교분석결과 유천리 청자는 Seger 식과 주성분분석에서 RO_(2)와 RO+R_(2)O가 6~8 및 0.3~0.38 mole로, 또 높은 SiO_(2)함량과 낮은 Na_(2)O, CaO의 함량으로 전북지역의 데이터 범위에 분포함을 볼 수 있었다. 유약의 주요산화물에 대한 비교분석결과에서는 Seger식과 주성분분석에서 모두 명확한 지역구분이 나타나지 않았으며, 따라서 유천리 청자 역시 명확한 지역적 특성을 구분하기 어려웠다. 태토중 미량성분의 주성분분석에 의한 통계처리결과 광주 충효동 도편들을 제외하고는 뚜렷한 지역간의 구분을 관찰하기 어려웠다. The characterization of chemical properties and analogy of manufactured origin for the eleven celadon sherds collected in Yuchunri, Buan were performed by analyzing their body and glaze compositions and compared with previous data reported. The chemical compositions of the body and glaze were determined by XRF and EPMA, respectively. The trace elements of the body were also determined by ICP-MS. The Seger analysis and PCA were used to compare the major compositions of body and glaze of the potteries we found with previous data. The Celadon sherds from Yuchunri are distributed in a range of Chonnam potteries considering RO_(2) and RO+R_(2)O are 6~ 8 and 0.3 ~O.38mole, respectively and also high in SiO_(2) and low in Na_(2)O and CaO concentrations in the comparison between the potteries for the major compositions of the body. Differences of the chemical characteristics of those potteries between the provinces were not clear in comparison of the glaze compositions and trace element of the body.
Han Dong-Hee,Han Man-Seok,Lee Seung-Jae,Shin Byung-Seok,Kim Jang-Oh,Kwon Da-Eun,Jung Kyung-Hwan,Lee Seung-Hwan,Baek Cheol-Ha 한국물리학회 2023 THE JOURNAL OF THE KOREAN PHYSICAL SOCIETY Vol.82 No.3
The purpose of the study was to evaluate the radiation dose in High-Defnition Reference Korean-Man phantom according to the lead equivalent in the protection devices using MCNPX. The tube voltage and current are 80–100 kV and 15 mAs, respectively, and the exposure time is 7–10 min. The range of lead equivalent of the protection devices worn by the operator phantom is 0–0.50 mmPb with the internal of 0.05 mmPb. The radiation dose indirect calculation method, the NDD(k), and variance reduction techniques are applied. The average error rate of the absorbed dose in each organ was 12.88% at 80 kV and 7.41% at 100 kV. Among the organs, the doses by the gonads (testis) and bladder accounted for 58.91%, resulting from close proximity to the table height, the origin of the scattered radiation. In case of evenly distributed bone surfaces throughout the body, it was 25.66%. This study quantitatively reports that after 0.25 mmPb lead equivalent of radiation protection devices commonly used in the clinical interventional procedure, TACE, the decrease in efective dose begins to slow down and become constant.
유화제 종류에 따른 폐식용유 사용 고강도 모르타르의 공학적 특성 및 자기수축 특성
한민철(Han, Min-Cheol),한상윤(Han, Sang-Yun),조만기(Jo, Man-Ki),이동규(Lee, Dong-Gyu),김태청(Kim, Tae-Cheong) 대한건축학회 2013 大韓建築學會論文集 : 構造系 Vol.29 No.10
In this paper, tests were carried out to investigate experimentally the effect of emulsifying agent type on reduction of autogenous shrinkage and engineering properties of the waste cooking oil added high strength mortar with 20% of W/B. Eucarol (EWCO-1) and Emulsion (EWCO-2) were applied for emulsifying agent. Existing waste cooking oil(WCO) and shrinkage reducing agent(SR) were also used and compared. Test results indicated that the increase of shrinkage reducing agents used in this study resulted in a decrease of flow and, contents and compressive strength. However, the use of EWCO-2 made the mortar reduce the decrease of their physical properties. For autogenous shrinkage, it was found that the use of shrinkage reducing agent also led to reduce the autogenous shrinkage. Moreover, the use of EWCO-2 had comparably larger reducing effect on autogenous shrinkage than other agent.