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Chung, Sung Yun,Kim, Sunyoung,Lee, Ju‐,Hyuck,Kim, Kyongjun,Kim, Sang‐,Woo,Kang, Chong‐,Yun,Yoon, Seok‐,Jin,Kim, Youn Sang WILEY‐VCH Verlag 2012 ADVANCED MATERIALS Vol.24 No.45
<P>An all‐solution‐processed flexible piezoelectric nanogenerator, composed of polycrystalline ZnO thin film and functional polymer layers such as P3HT/PCBM and PEDOT:PSS, generates energy through a mechanical rolling and muscle stretching system. On page 6022, Youn Sang Kim, Sang‐Woo Kim, and co‐workers show that this all‐solution‐processed nanogenerator is feasible as a piezoelectric patchable device and is promising for use in future energy harvesters such as wearable human patches and mobile electronics. </P>
성아영,김찬수,이석주,조수현 대불대학교 2002 論文集 Vol.8 No.1
Now a days, LASIK(laser in situ keratomileusis) surgical operation is enforced widely by method that is used to correct ametropia such as near-sightedness, far-sightedness, astigmatism etc. This wishes to solve troublesome matter for glasses and contact lens wearer that reform a part of corneal stroma by laser after using microkeratome in which make corneal flap. This experiment present that refraction by auto-refractometer in point of time before and after a week to those who undergone LASIK surgical operation 30 patients. 60 eyes that become full corrected(spherical power : +0.50D∼-0.50D). By this research method, in point of time that examination has a week after operation because of refraction power changed by passage of time and classified by sex, age, occupation, and degree of myopia(low:-1.0D∼-3.0D, moderate: -3.0D∼-6.0D, high :more than -6.0D). As a result of this study LASIK surgery can solve uncomfortableness by wearing glasses or contact lens, but the result objectively doesn't meet satisfaction level though full correction had made.
Bleomycin에 의한 채찍양(flagellate) 피부 색소 침착 1예
김주섭,신성욱,박석돈 圓光大學校 醫科學硏究所 1995 圓光醫科學 Vol.11 No.2
Bleomycin is one of the widely-used chemotherapeutic agents. It may cause non-specific changes in the skin including stomatitis, hair loss, nail changes, inflammatory nodules, multiform erythema and vesicobullous eruptions. Cutaneous flagellate pigmentation on pressure or trauma sites is known as specific cutaneous reaction to bleomycin, although its pathomechanism is not clearly elucidated. We experienced a rare flagellate pigmentation due to bleomycin injection in a patient with metastatic testicular tumor. A 25-year-old male showed linear brown flagellate pigmentations on the trunk, axillae, dorsa of hands, which were developed after BEP(bleomycin. etoposide, cisplatin) combination chemotherapy. He underwent left radical orchiectomy and artificial testicular replacement because of metastatic testicular endodermal sinus tomor(stage D_2). Gentle rubbing or scratching on the skin caused linear brownish edema and residual pigmentation. Histopathologic finding of the pigmented sites revealed melanin pigmentation of basal cell layer and patchy pigmentation of low prickle cells. The flagellate pigmentation became paler during 7 months follow-up period. Authors report a cutaneous flagellate pigmentation after bleomycin chemotherapy.
타이어 설계인자를 고려한 자동차의 조종 및 안정 특성에 관한 연구
윤성운,홍석주,최규남 朝鮮大學校 機械技術硏究所 2004 機械技術硏究 Vol.7 No.2
As the technique of automobile industry is being advanced, the advancement of performance for vehicle is being required. In order to achieve this purpose, the study on the handling and stability which are produced by moving vehicle is carried out actively. Ability to predict vehicle performance using computer simulation is essential to reducing the development time for tire companies as well as car makers. From the previous research. we showed that handling simulation tool developed for J-turn and lane change maneuvers on ADAMS could be used in predicting the performance difference among tires with different specifications in vehicle mild handling behaviors. Through this study, some meaningful correlations were achieved. Also barriers to direct application of the simulation technique to tire development process and several technical problems that should be resolved were iden tified. In this results, ability to predict vehicle performance using computer simulation is essential to reducing the development time for tire companies as well as car makers.
강명주,지삼룡,박석주,이재익,조영완,김준영,박성재,박은택,이연재,이상혁,설상영,배상균 인제대학교 2006 仁濟醫學 Vol.27 No.-
Carcinoid tumors have been reported in a wide range of organs but most commonly involve the lungs, bronchi and gastrointestinal tract. Within the gastrointestinal tract, appendix is the most common location for carcinoid, followed by the distal small intestine, the rectum, and the stomach. Among these, primary involvement of the ampulla of Vater is extremely rare. We report a case of carcinoid tumor of ampulla of Vater. A 62-year-old man presented with epigastric soreness. Gastroduodenal endoscopy showed hyperemic bulging mass on ampulla of Vater and diagnosed as carcinoid tumor by histologic finding, with immunohistochemical study. In ^(111)In-octreoscan, tumor had regional lymph node metastasis, but no evidence of distant metastasis. Pancreatoduodenectomy with lymph node dissection was performed.
Prevotella nigrescens의 용혈특성에 관한 연구
곽주석,장훈상,장석우,이수종,유용욱,민경산 大韓齒科保存學會 2005 Restorative Dentistry & Endodontics Vol.30 No.4
세균의 용혈활성은 세균이 숙주 내에서 생존하기 위해 필요한 철을 획득하기위한 특성이며 기능면에서 볼 때 숙주에 대한 중요한 독력인자로 간주될 수 있다. 본 연구에서는 괴사치수 및 치근단 치주염으로 진단된 환자의 근관에서 분리한 Prevotella nigrescens의 용혈활성을 다양한 조건 하에서 측정하여 그 특성을 규명하는 것을 목적으로 한다. 1. 임상에서 분리한 P. nigrescers와 표준균주인 P. nigrescers ATCC 33563에서 모두 용혈활성이 나타났다. 2. 사람, 면양 및 말 세 가지 종에 대해 용혈활성을 비교한 결과 사람의 적혈구에서 가장 강한 용혈활성을 나타내었다. 3. 용혈소 억제제인 NaN₃와 dithiothreitol (DTT)는 농도의존적으로 P.nigrescers의 용혈활성을 감소시켰다 (p<0.05). 4. P. nigrescers가 최대 용혈활성을 나타내는 최적의 pH는 4이었으며, 50℃이하의 온도에서는 용혈활성을 보였으나 95℃에서 급격히 감소하였다. 5.배양조건에 따른 P. nigrescens의 용혈활성을비교한 결과 10% CO₂배양기에 배양한 경우혐기성 조건에서 배양한 것보다 더 높은 용혈활성을 보였다. Hemolytic property is a specific feature of bacteria to obtain iron which is essential for its survival in host tissues. Therefore, it is thought to be one of several factors of virulence. The purpose of this study was to investigate the hemolytic properties of Prevotella nigrescens isolated from the teeth diagnosed as pulp necrosis and apical periodontitis under the presence of hemolysin inhibitors such as NaN3 and dithiothreitol, heat, various pH and cultural conditions. The results were as follows; 1. Clinically isolated P. nigrescens strains and standard P. nigrscens ATCC 33563 showed hemolytic activity. 2. P. nigrescens showed higher hemolytic activity against human erythrocytes than sheep or horse erythrocytes. 3. NaN₃ and dithiothreitol (DTT) reduced the hemolytic activity of P. nigrescens in a dose dependent manner (p<0.05). 4. Optimal pH for the maximum hemolytic activity of P. nigrescens was 4.0 and the hemolysin was stable under the 50℃, but the hemolytic activity was significantly decreased at 95℃. 5. P. nigrescens cultured in 10% CO₂ condition showed higher hemolytic activity than the bacteria cultured in the anaerobic condition.[J Kor Acad Cons Dent 30(4):335-343,2005]