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김선문,허원석,채경훈,강윤세,정재훈,김연수,박기오,문희석,이엄석,김석현,성재규,이병석,이헌영,신경숙,조준식,송인상,강대영 충남대학교 의학연구소 2003 충남의대잡지 Vol.30 No.2
Malignant peritoneal mesothelioma is a rare neoplasm that arises from the mesothelium of a serosal cavity and is a rapidly fatal disease with a median survival of 4 to 12 months for untreated cases. Recently, we experienced a case with malignant peritoneal mesothelioma who was suspected hepatocelluar carcioma by abdominal CT scan and was confirmed by biopsy including immunohistochemical stain(calretinin) after surgery. We performed tumor excisions and wedge resection of the liver(segment Ⅷ)and inserted Tencoff catheter in abdominal cavity at 25th day of post-operation. We treated with intraperitoneal paclitaxel(25mg/m^(2)/day for 5 days) six courses monthly. She was well tolerable and is still living without any evidence of recurrence for 14th month of post-operation.
Jung‑Hun Lee,Min‑Su Park,Hong‑Seon Ahn,Kyung‑Won Park,Jun‑Seok Oh,Seung‑Gyu Jeon,Dong‑Kyu Kim,Jae‑Eon Kim 대한전기학회 2020 Journal of Electrical Engineering & Technology Vol.15 No.4
When large scales DG are connected to the distribution system of unidirectional power currents, bi-directional power currents are formed, making it impossible to use conventional overcurrent protection methods alone to detect and isolate fault sections for ground and short-circuit faults. To solve these problems, this study proposed the method of protection against single-line-ground fault of common neutral line multi-contact local power distribution system using distance relay and directional relay. The proposed protection method was applied to the common neutral multi-ground distribution system to validate the protection against single-line-ground fault through the PSCAD/EMTDC software package and efectively detect and isolate only the zone of single-line-ground fault without malfunctions.
정승원,한대석,김석중,전문진 한국미생물생명공학회 ( 구 한국산업미생물학회 ) 1996 한국미생물·생명공학회지 Vol.24 No.2
Tyrosinase는 식품의 효소적 갈변과 생체내에서 melanin 합성을 촉매하는 효소이다. 식용 가능한 tyrosinase 저해제의 발효생산을 통하여 melanin 합성을 저해하는 효과를 가지는 미백식품 소재를 개발하고자 현재 식품의 제조에 이용되고 있는 안전한 미생물을 대상으로 tyrosinase 저해능이 높은 균주를 선발하고 표고버섯을 주 배지원으로 발효시켜 저해제 생산의 적정조건에 대하여 연구하였다. 발효식품으로부터 분리된 NU-7을 tyrosinase 저해제 생산을 위한 발효균으로 선정하여 tyrosinase 저해제 생산 최적배지 조건을 확인한 결과 glucose가 3~20% 및 ammonium sulfate가 0~0.25%인 범위에서 균체량 증가에 따른 tyrosinase 저해제 생산능의 차이는 나타나지 않았으며, 무기질소원으로 첨가한 ammonium sulfate의 영향은 비교적 낮았다. 한편, 표고버섯(Lentinus edodes, Shiitake) 함량은 저해제 생산과 밀접한 관계를 나타내어 버섯함량(X)에 대한 저해제 생산량(Y)이 Y=-0.96X^2+13.07X+14.43의 상관식을 보였고, R value는 0.96으로 나타나 최적발효 조건을 위한 최소한의 배지는 표고버섯과 glucose 만으로도 가능한 것으로 판단되었다. 표고버섯을 이용한 발효액에서 곰팡이 독소로 알려진 아플라톡신은 검출되지 않았으며 따라서 이를 식용할 수 있는 가능성이 높은 것으로 판단되었다. Tyrosinase is an enzyme which catalyzes an enzymatic browning of some foods and in vivo synthesis of melanin. In order to produce natural and edible inhibitor of the enzyme which is expected to have whitening effect on melanogenesis, a microorganism was selected from fermented foods. It was named as NU-7, and cultured in mushroom (Lentinus edodes, Shiitake) media. Optimal media to produce tyrosinase inhibitor was formulated by varing nitrogen or carbon content. If glucose content was in a range of 3~20% and ammonium sulfate was in a range of 0~0.25%, production of inhibitor was independent of cell mass. Addition of ammonium sulfate as a nitrogen source had little effect on inhibitor production. Production of inhibitor (Y) was proportionally related to shiitake content (X) with a regression equation of Y=-0.96X^2+13.07X+14.43 (R=0.96). These results indicate that shiitake and glucose are necessary for the production of tyrosinase inhibitor. In the analysis of mycotoxin in culture broth, aflatoxin was not detected, suggesting that it would be probably edible.
새로운 Quinolone 誘導體의 合成에 關한 硏究(Ⅱ)
함원훈,고윤석,배형준,이기영,정영훈 성균관대학교 약학연구소 1995 成均藥硏論文集 Vol.7 No.1
Abstract - Palladium catalyzed cross-coupling reactions of aryl halides with organo tin reagents and π-sufficient aromatic heterocycles proceeded easily and efficiently during carbon-carbon bond formation. We used this method for the anti bacterial agents, and synthesis of new quinolone derivatives which have C-C bond at C-7 position of general quinolone moieties. Quinolone moieties, and aryl tin or aromatic heterocycles in the presence of palladium catalyst were coupled to afford new quinolone derivatives. The synthesis and structure-activity relationship are presented.
감성돔, Acanthopagrus schlegeli의 종묘생산 및 성분화에 미치는 영향
한종석,김용구,라성주,윤호섭,이원교,김정,최상덕 國立 麗水大學校 環境問題硏究所 2002 環境硏究論文集 Vol.5 No.-
This study was carried out to produce the seeding of the larvae and juvenile of black sea bream, Acanthopagrus schlegeli in terms of artificial hatching, feeding behavior and growth rate in each factor. Total length of black sea bream larvae hatched was 2.57±0.35mm and after 50 days, total length was 22.08±3.74mm, 49.7% in survival rate. This research was conduced to confirm the effect of tributyltin and 2,4-dinitrophenol on the sex differentiation in Black Sea bream, Acanthopagrus schlegeli. Fish were reared of oral administration of tributyltin at 0.05, 0.5, 5㎍/g and 2,4-dinitrophenol at nominak concentration of 0.05, 0.5, 5, 50㎍/g diet from 156 days to 185 days after hatching. In the process of the differentiation until 156 days after hatching, gonads were composed testis. In contrast, 185 days after hatching, testis were composed of a number of spermatogonia and sperm duct. The female in the control in which sex differentiation of Acanthopagrus schlegeil was normally conducted was 100%. The experimental unit of estradiol-17β, it was 100% in 0.05㎍/g diet concentration, which was similar to the sex ratio of the control. And it was 100% in 0.5㎍/g diet concentration. In each experimental unit with 5, 50㎍/g diet concentrations, every individuals of them differentiated to males. About the experimental unit of tributyltin, the females were 100%, 100%, 100%, 100% and 100% in 0.05㎍/g, 0.5,㎍/g, 5㎍/g and 50㎍/g diet concentrations, respectively. About the experimental unit of 2,4-dinitrophenol, the males were 100% tn 0.05, 0.5, 5, 50㎍/g diet concentrations, respectively.
물-공기 계면에서 긴 사슬 양 말단 작용기 분자인 α,ω-13,16-Dimethyloctacosanedioate Dimethylester(C_30DME)의 거동에 관한 연구
이정근,손대원,이관수,송석호,김현명,정선호 한양대학교 자연과학연구소 2001 自然科學論文集 Vol.20 No.-
물-공기 계면에서 표면압력의 증가에 따른 C30DME 분자의 구조 변화를 살펴보았다. 표면압력(π)-표면적(A) 등온선을 통해 표면적이 줄어들 때 C30DME 분자가 선형으로부터 역 U 자형 구조로 변하는 것을 확인하였다. C30DME의 역 U 자형 구조의 형성을 확인하기 위하여 Surface Plasmon Resonance (SPR)와 ellipsometry를 이용하여 Langmuir-Blodgett (LB) film 의 두께를 측정하였고 이 두께는 C30DME 분자의 역 U 자형 구조의 높이와 일치함을 관찰하였다. 또한 Atomic Force Microscope (AFM)을 이용한 표면 거침도 측정의 결과는 선형으로부터 역 U자형 구조로의 구조적 변화가 불연속이라는 것을 보여주었다. We investigated the conformational change of C30DME molecule with an increase on surface pressure at the air-water interface. The surface pressure (π)-area (A) isotherm indicates that the structure of C30DME changed from linear to reverse U-shape as the surface area was compressed. In order to confirm the formation of reverse U-shape, we examined the thickness of Langmuir-Blodgett (LB) film by a surface plasmon resonance (SPR) and an ellipsometry. The result of surface roughness measurement using an atomic force microscope (AFM) showed that the conformational change from linear to reverse U-shape is discontinuous.
김우중,이원홍,윤석호 진주산업대학교 1996 論文集 Vol.35 No.-
The great difference in elastic properties between fiber and matrix materials leads to a higher ratio of in-plane Young's modulus to transverse shear modulus for laminated composite shells. Thus, to obtain more accrate solutions to laminated composite shell probllems the effects of shear strain must be considered in the analysis of them. The present study deals with the third-order shear deformation theory for simply-supported cross-ply laminated composite shells by the double-Fourier series solutions.