슬부에 발생한 낮은 악성도의 연부조직 거대 세포종 - 증례 보고 -

이은우,강기서,강수용,이한준,김종원,이기현,박영욱,Lee, Eun-Yoo,Kang, Ki-Ser,Kang, Soo-Young,Lee, Han-Jun,Kim, Jong-Won,Lee, Gi-Hyun,Park, Young-Uk 대한근골격종양학회 2003 대한골관절종양학회지 Vol.9 No.1

Folope 등(1999년)은 악성 연부조직 거대 세포종과 임상적, 병리학적, 면역조직화학적으로 유사하나, 악성도가 낮은 연부조직 거대 세포종을 보고하였다. 본 교실에서 치료한 1례는 30세 여자 환자로 내원 1년전부터 우측 슬관절 전외측부에 만져지는 종물과 동통을 주소로 내원하였다. 절제 생검을 통한 조직학적 소견상 거대 세포와 함께 호산성 세포질과 소포성의 핵을 지닌 다형성의 기질 세포 병변은 낮은 악성도의 연부조직 거대 세포종에 합당하였고, 이에 저자들은 낮은 악성도의 연부조직 거대 세포종 1례를 경험하였기에 문헌고찰과 함께 보고하는 바이다. Folope et al(1999) reported soft tissue giant cell tumor which was similar to malignant giant cell tumor in clinical, pathologic, and immunohistological aspect but represented low malignancy. We reported a 30-year-old female suffered from pain and palpable mass on the anterolateral aspect of the right knee for one year. Excisional biopsy from the lesion revealed some giant cells and polymorphous cells containing eosinophilic cytoplasm and vacuolated nucleus. Histopathologic findings of the lesion were consistent with soft tissue giant cell tumor of low malignant potential. Hereby, we report a case of soft tissue giant cell tumor of low malignant potential with a review of the literature.

납동위원소비 분석을 활용한 인용사지 출토 청동기의 원료 산지 연구

이은우,김소진,한우림,한민수,황진주,Lee, Eun Woo,Kim, So Jin,Han, Woo Rim,Han, Min Su,Hwang, Jin Ju 한국문화재보존과학회 2014 보존과학회지 Vol.30 No.4

인용사지에서 출토된 청동기 5점으로부터 채취한 시료를 대상으로 원료의 기원과 이동을 확인하기 위해 성분분석 및 납동위원소비 분석을 실시하였다. 인용사지에서 출토된 청동기는 구리 및 주석의 이원계 합금으로 제작되어 납이 인위적으로 첨가되지 않음을 확인할 수 있었다. 또한 출토 청동기의 납동위원소비 분석 결과, Mabuchi(1985)의 분포도에 의해 한반도 남부 및 중국 남부 지역에 포함됨을 확인하였으며, 한반도 납동위원소 분포도에 도시하여 태백산분지인 Zone 2 및 옥천변성대에 해당하는 Zone 3에 위치함을 알 수 있었다. 대상 유물은 모두 납의 함량이 상당히 적은 주석청동으로, 이때의 납동위원소비는 구리 광석의 산지에서 기인하는 것으로 추정할 수 있다. 납동위원소비 분석은 납을 미량으로 포함한 모든 유물에 적용 가능하므로, 다양하게 해석할 수 있으며, 추가적인 데이터의 확보와 연구를 통해 산지 추정 연구의 신뢰성을 높일 수 있을 것이라 판단된다. Chemical and Pb isotope analysis were performed in order to determine the origin of bronze artefacts excavated from the Inyongsaji site in South Korea. The result of ICP-MS shows that they are tin bronzes in which lead was not intentionally added during production. Pb isotope data analyzed by TIMS are plotted in the southern region of Korea and China of the distribution map drawn by Mabuchi(1985). On the other hand, the identical isotope data are plotted in the Taebaek basin and the Olcheon metamorphic belt correspondent to zone2 and zone3 respectively. It is believed that the isotope data on the tin bronzes which have very low lead content can be used to trace the origin of copper ore rather than those of either lead or tin ore. Pb istope analysis allows diverse interpretation as it can be applied to any object containing trace amounts of lead. In addition, accumulation of isotope data as well as further studies will improve reliability of the provenance studies.

Aromatic Polyamide(PPTA) 및 Modified PPTA 혼합 Nylon 6의 구조와 역학적 성질에 관한 연구(I)

이은우,손태원,장동호,Lee, Eun-U,Son, Tae-Won,Jang, Dong-Ho 한국섬유공학회 1994 한국섬유공학회지 Vol.31 No.8

Molecular composite materials made of various composite of nylon 6, PPTA and modified PPTA were prepared through sulfuric acid solution, and the mechanical and structural properties of the composite materials were investigated by some instrumental analyses such as UTM. SEM, XRD. RV, IR, HMR etc. from the result of these studies. we found the following facts. Firstly. it was found that the PPTA and M-PPTA were dispensed as a form of fibrils into nylon 6 matrix to make blentls of molecular composites. Secondly, mechanical properties such as initial modulus, yield stress and tensile strength of the composite materials were increased steadily according to increase of the composition ratio of PPTA alldyor M-PPTA.

긴장 및 무긴장 상태에서 열처리한 PP 필라멘트의 구조 및 역학적 성질에 관한 연구

이은우,Lee, Eun-Woo 한국산업융합학회 2001 한국산업융합학회 논문집 Vol.4 No.4

The change of crystalline structure and mechanical properties of drawn PP filaments which was treated by tensioned and non-tensioned annealing was investigated. Measurements were carried out with XRD for crystallite size, density gradient tube for crystallinity. and UTM for mechanical properties. Tensioend and non-tensioned annealing were carried out $80^{\circ}C$, $100^{\circ}C$, $120^{\circ}C$: for 10min., 30min., 60min, in oil bath. It was found that the crystallinity and crystallite size of (110) plane of samples were increased with increasing of annealed temperature and time. Also crystallinity and crystallite size of samples which was tensioned annealing were larger than those of non-tensioned annealed samples. Initial modulus and tensile strength of tensioned annealed samples were higher than non-tensioned annealed samples, But elongation of tensioned annealed samples was lower than non-tensioned annealed samples.

대학병원의 교수연구 및 학생 임상교육 개선방안

이은우,Lee, Eun-U 대한병원협회 1985 대한병원협회지 Vol.14 No.11

단풍취 추출물 및 분획물의 항산화 및 α-glucosidase 저해 활성 평가

이은우,김태완,김현석,박윤문,김성호,임무혁,곽재훈,김태훈,Lee, Eun-Woo,Kim, Taewan,Kim, Hyun-Seok,Park, Youn-Moon,Kim, Seong-Ho,Im, Moo-Hyeog,Kwak, Jae Hoon,Kim, Tae Hoon 한국식품저장유통학회 2015 한국식품저장유통학회지 Vol.22 No.2

Among the naturally occurring antioxidants, polyphenols are widely distributed in various fruits, vegetables, wines, juices, and plant-based dietary sources and divided into several subclasses that included phenolic acid, flavonoids, stilbenes, and lignans. As part of our continuing search for bioactive food ingredients, the antioxidant and ${\alpha}$-glucosidase inhibitory activities of the aqueous ethanolic extract from the aerial parts of Ainsliaea acerifolia were investigated in vitro. The antioxidant properties were evaluated via radical scavenging assays using 1,1-diphenyl-2-picrylhydrazyl (DPPH) and 2,2'-azino-bis (3-ethylbenzothiazoline-6-sulphonic acid) ($ABTS^+$) radicals. In addition, the anti-diabetic effect of A. acerifolia extracts was tested via ${\alpha}$-glucosidase inhibitory assay. Furthermore, the total phenolic contents were determined using a spectrophotometric method. All the tested samples showed dose-dependent radical scavenging and ${\alpha}$-glucosidase inhibitory activities. In particularly, the ${\alpha}$-glucosidase inhibitory and radical scavenging properties of the ethyl acetate (EtOAc)-soluble portion from the aerial parts of the A. acerifolia were higher than those of the other solvent-soluble portions. These results suggest that A. acerifolia could be considered a new potential source of natural antioxidants and antidiabetic ingredients. More systematic investigation of the aerial parts of A. acerifolia will be performed for the further development of anti-oxidative and antidiabetic drugs. 단풍취를 70% 에탄올로 침지 추출하여 얻어진 추출물에 대해 n-hexane, EtOAc 및n-BuOH로 순차 용매 분획하였고, 얻어진 결과물에 대하여 DPPH와 $ABTS^+$ radical 소거능 및 ${\alpha}$-glucosidase 저해활성을 평가하였다. DPPH 라디칼 소거능은 페놀성 화합물의 함량이 상대적으로 높은 EtOAc층에서 $IC_{50}$ 값이 $23.4{\pm}0.3mg/mL$으로 강한 DPPH 라디칼 소거능을 확인하였고, 단풍취 추출물에 존재하는 페놀성 화합물과 라디칼 소거능과의 연관성을 시사하였다. 또한 $ABTS^+$ 라디칼 소거능은 EtOAc층의 $IC_{50}$ 값이 $19.9{\pm}2.3mg/mL$, n-BuOH층이 $IC_{50}$ 값이 $23.4{\pm}0.3mg/mL$의 우수한 라디칼 소거활성이 확인 되었고, 강한 활성물질의 존재가 시사되었다. 또한, ${\alpha}$-glucosidase 저해활성을 측정한 결과, 강한 $ABTS^+$ 라디칼 소거능을 나타낸 EtOAc 층의 $IC_{50}$은 $103.4{\pm}1.0mg/mL$의 저해활성을 나타내었으며 이는 positive control인 acarbose에 비해 우수한 활성이었으며, 추출물 상태의 시료를 단일물질로 정제할 경우 더욱 강한 효능의 화합물이 존재할 가능성을 시사하였다. 향후 이들 활성물질 동정을 통한 활성 기작에 대한 연구가 필요하며 본 연구 결과는 보다 우수한 라디칼 소거능 및 ${\alpha}$-glucosidase 저해능을 가지는 새로운 기능성 식품소재 발굴을 위한 기초자료로 활용가능하리라 사료된다.

칠장사 오불회 괘불탱 화기에 기록된 채색 재료의 해석

이은우,윤지현,권윤미,신태호,Lee, Eun Woo,Yoon, Ji Hyeon,Kwon, Yoon Mi,Shin, Tae Ho 한국문화재보존과학회 2020 보존과학회지 Vol.36 No.6

본 연구는 칠장사 오불회 괘불탱의 과학적 조사 결과를 종합하여 화기에 기록된 채색 재료에 대해 해석하고자 하였다. 연구결과 진분은 연백, 주홍은 진사, 황단은 연단, 황금은 금, 석자황은 석황으로 확인되었다. 녹색의 당하엽과 삼록은 copper trihydroxychloride, 청색의 대청과 중청은 석청으로 확인되며 이들의 입도에 따라 색상의 변화를 준 것으로 보인다. 연지와 청화는 각각 적색과 청색의 유기염료로서 청색은 쪽의 존재가 확인되나 연지는 고문헌과 한자의 명칭에 차이를 보여 통시적으로 사용된 연지인지는 불분명하다. 수토황은 괘불탱에서 그 존재가 확인되지 않았으나 황색 계열의 재료로 보이며 토양추출물이나 등황일 가능성이 높다. This study aimed to interpret the coloring materials recorded in the ceremonial writing with the scientific investigation results of the Hanging Painting of the Chiljangsa Temple (Five Buddhas). The results confirm that the Jinboon, Joohong, Hwangdan, Hwanggeum and Seokjahwang are clearly connected to lead white, cinnabar, minium, gold, and orpiment, respectively. Danghayeop and samrok are related to Copper trihydroxychloride, while Daecheong and Joongcheong are azurite, and they seems to be classified by the particle size. Yeonji and Chunghwa are organic dyes in red and blue, respectively, with blue confirming the existence of the side, but Yeonji differs from the names of the ancient texts and Chinese characters; it is unclear whether it is a commonly used Yeonji because of differences in the names of the ancient texts. The presence of Sootohwang has not been confirmed in the gwaebultaeng, but it can be extracted from the soil as a yellow-colored material but the possibility of Deunghwang cannot be ruled out.

컴퓨터 단층 촬영 영상에서의 전이성 척추 종양의 정량적 분류를 위한 라디오믹스 기반의 머신러닝 기법

이은우,임상헌,전지수,강혜원,김영재,전지영,김광기,Lee, Eun Woo,Lim, Sang Heon,Jeon, Ji Soo,Kang, Hye Won,Kim, Young Jae,Jeon, Ji Young,Kim, Kwang Gi 대한의용생체공학회 2021 의공학회지 Vol.42 No.3

Currently, the naked eyes-based diagnosis of bone metastases on CT images relies on qualitative assessment. For this reason, there is a great need for a state-of-the-art approach that can assess and follow-up the bone metastases with quantitative biomarker. Radiomics can be used as a biomarker for objective lesion assessment by extracting quantitative numerical values from digital medical images. In this study, therefore, we evaluated the clinical applicability of non-invasive and objective bone metastases computer-aided diagnosis using radiomics-based biomarkers in CT. We employed a total of 21 approaches consist of three-classifiers and seven-feature selection methods to predict bone metastases and select biomarkers. We extracted three-dimensional features from the CT that three groups consisted of osteoblastic, osteolytic, and normal-healthy vertebral bodies. For evaluation, we compared the prediction results of the classifiers with the medical staff's diagnosis results. As a result of the three-class-classification performance evaluation, we demonstrated that the combination of the random forest classifier and the sequential backward selection feature selection approach reached AUC of 0.74 on average. Moreover, we confirmed that 90-percentile, kurtosis, and energy were the features that contributed high in the classification of bone metastases in this approach. We expect that selected quantitative features will be helpful as biomarkers in improving the patient's survival and quality of life.

Aromatic Polyamide(PPTA) 및 Modified PPTA 혼합 Nylon 6의 구조와 역학적 성질에 관한 연구(II)-열처리에 의한 혼합물의 구조와 물성에 관한 연구-

이은우,손태원,장동호,Lee, Eun-U,Son, Tae-Won,Jang, Dong-Ho 한국섬유공학회 1994 한국섬유공학회지 Vol.31 No.12

Heat~treated composite materials made of various composition of nylon 6, PPTA, and modified PPTA were prepared. Heat-treatment carnied out in vacuum oven for 60min at 16$0^{\circ}C$. The mechanical and structural properties of the composite materials were investigated by UTM, SEM, XRD and RV, etc. By the heat treatment, loss and storage moduli increased and moved to higher temperature region compared with the non-heat treated materials.

농촌 도시간 인구이동의 실태와 영향

이은우(Eun Woo Lee) 한국노동경제학회 1993 勞動經濟論集 Vol.16 No.1

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