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신현승(Hyun Seung Shin),한광협(Kwang Hyub Han),박상진(Sang Jin Park),안신기(Shin Kee Ahn),전재윤(Chae Yoon Chon),문영명(Young Myoung Moon),강진경(Jin Kyung Kang),박인서(In Suh Park),김현숙(Hyun Sook Kim),권오웅(Oh Woong Kwoun) 대한내과학회 1994 대한내과학회지 Vol.46 No.4
Background: Epidemiologic studies shows that Korea is one of the high incidence area of hepatocellular carcinoma (HCC) and the major etiologic factor is hepatitis B virus (HBV1. Recently developed assay for circulating antibodies against hepatitis C virus (HCV) suggests the possible etiologic role of HCV for HCC in a number of countries. To evaluate the role of hepatitis virus infection and clinical characteristics in Korean patients with HCC. We studied the positive rates of anti-HCV and HBsAg and analyzed clinical aspects in patients with HCC. Methods: Three hundred twenty six patients with HCC were included from May 1990 to June 1992. We analyzed the prevalence of hepatitis virus infection (B and C) and clinical aspects of the patients with HCC. Results: Among 326 patients examined, two hundred fifteen patients were found to be carriers of hepatitis B surface antigen (HBsAg) and hepatitis C antibodies (anti-HCV) were detected in 59 patients (18.1%). Two hundred nine patients were positive for HBsAg but negative for anti-HCV (64.1%, group B), Fifty four patients were negative for HBsAg but positive for anti-HCV (16.6%, group C). Fifty eight patients were negative for both HBsAg and anti-HCV (17.8%, group Non-BC), Five patients were positive for HBsAg and anti-HCV (1.5%, group BC). The mean age of patients in group C was significantly higher than that of patients with group B (65.3 versus 51.5 years, p<0.01). Coexistence of liver cirrhosis at diagnosis of HCC was found in 254 patients (77.6%) among 326 patients and there was no significant difference between groups. But according to Child-Pugh classification, percentage of class B and C were higher in group C than group B (68.5 vs 32.5%). By the gross appearance of HCC, nodular (single or multiple) type was more common in group C than group B (68.5 vs 32.5%). Alpha-fetoprotein levels greater than 400 ng/ml were found in 187 patients (57.4%) among 326 patients, 63.6% in group B, 51.9% in group C, 39.7% in group Non-BC. Another finding was that the past history of blood transfusion was noticed in only about 11% of anti-HCU positive patients. The detection rates of second generation enzyme immunoassay (EIA) for anti-HCV in HBsAg-negative HCC patients was slightly higher than that of the first generation EIA (50.7 vs 44. 49o). Conclusion: These data suggest that although hepatitis B virus is still the most important etiologic factor for HCC in Korea, HCV infection is an another important etiologic factor in HRsAg-negative HCC patients. Patients with HCV-related HCC tended to be older in age, more frequently associated advanced cirrhosis and nodular appearance in gross finding compared with HBV related HCC.
박상진(Sang Jin Park),전재윤(Chae Yoon Chon),신현승(Hyun Seung Shin),문희용(Hee Yong Moon),한광협(Kwang Hyub Han),문영명(Yung Myung Moon),강진경(Jin Kyung Kang),박인서(In Suh Park),박찬일(Chan Il Park) 대한내과학회 1993 대한내과학회지 Vol.45 No.6
Primary hepatic angiosarcoma is an extremely rare tumor. It is associated with chronic exposure to thor- otrast, vinyl chloride, arsenic, radium and possibly cop- per and with chronic idiopathic hemochromatosis. However, there are no known causes in about 40% of these patients. Although 40% of patients have hepatic fibrosis or cirrhosis at autopsy, the nature of the association between chronic liver disease and hepatic angiosarcoma is unknown. Only 3% of patients with hepatic angiosarcoma can live longer than 2years. A 44-year-old man was admitted due to right upper quadrant pain. He had no history of exposure to vinyl chloride, thorotrast, or arsenic. Abdominal CT scan showed multiple variable sized low density lesions with tortuous contrast enhancement from the periphery of the tumor in the right lobe of the liver. On the 2nd hospital day, hemoperitoneum was developed and emergency selective angiograpy was performed. In seletive angiography. the vascular puddling and stretching of the hepatic artery due to the enlarged tumor was shown on the right lobe of the liver from early arterial to late venous phase. In spite of double spring coil embolization and conservative care, the patient died. The patient was confirmed to have primary hepatic angiosarcoma by blind liver biopsy. We report a patient of primary hepatic angiosarcoma who came to the hospital because of right upper quad- rant pain and died of spontaneous rupture of the tumor with hemoperitoneum.
현탁중합을 이용한 poly(styrene-co-tert-butyl methacrylate) 압력가소성 고분자의 합성
박소영 ( So-young Park ),신현승 ( Hyun-seung Shin ),류상욱 ( Sang-woog Ryu ) 충북대학교 산업과학기술연구소 2023 산업과학기술연구 논문집 Vol.37 No.2
In this study, poly(styrene-co-tert-butyl methacrylate) was synthesized by mixing styrene and tert-butyl methacrylate monomers and performing suspension polymerization. As a result of 1H-NMR measurement, three ratios were observed, and it was confirmed that excellent baroplastic properties were exhibited when pressure was applied at 70℃, 90℃, and 120℃, depending on the composition. In particular, transparent specimens were observed even at 70℃, which is lower than the mixing Tg of the copolymer. Overall, it can be said that excellent baroplastic properties are exhibited when styrene is present in an equal or excessive amount. However, transparent polymer samples were not observed in copolymers with excess tert-butyl methacrylate, indicating that composition control is important for baroplastic properties when synthesizing polymers through suspension polymerization.
유용 효모균주를 이용한 발효참당귀분말 추출물의 이화학적 특성 및 생리활성 효과
심소연(So-Yeon Sim),박우상(Woo-Sang Park),신현승(Hyun-Seung Shin),옥민(Min Ok),조영수(Young-Su Cho),안희영(Hee-Young Ahn) 한국생명과학회 2019 생명과학회지 Vol.29 No.10
본 연구는 Saccharomyces cerevisiae를 이용하여 발효한 참당귀 분말을 수용성 용매에 추출하여 이화학적 특성 및 생리활성을 비교 검토하였다. 당도 및 pH를 확인한 결과, NF군 1 °Brix에 비해 F/3군 0.9 °Brix로 발효가 됨에 따라 당도가 감소하는 경향을 보였다. 한편, F/3군의 pH는 NF군 및 F/0군에 비해서 높은 수치를 나타냈다. Thin-layer chromatography 실험결과, F/3군이 NF군에 비해 대부분 저분자의 당 형태로 분해된 것을 확인하였다. 총 폴리페놀 함량 및 플라보노이드 함량은 참당귀 분말 추출물에 비해 발효 참당귀 분말 추출물에서 전반적으로 함량이 증가하였다. 미네랄 중 K 및 Ca 함량은 F/3군, F/0군 및 NF군 순으로 증가하는 경향을 보였다. Decursin 및 decursinol angelate 함량은 NF군보다 F/3군에서 더 높은 함량을 나타냈다. 참당귀 및 발효 참당귀 수용성 추출물의 항산화 활성은 NF군 41.89%, F/0군 39.51%, F/3군에서 60.26%으로 활성이 증가하는 것을 확인하였다. 미백 및 항염증 효능 실험결과, 참당귀 분말 추출물에 비해 발효 참당귀 분말 추출물에서 효능이 증가하는 경향을 나타내었다. 따라서 한방 생약재 중 참당귀를 유용 미생물로 발효시켜 사용함으로써 항산화능, 생리활성물질, 미백효능 및 항염증 효과에서 긍정적인 결과를 나타내어 향후 화장품 개발을 위한 소재로써 기대할 수 있을 것으로 사료된다. The purpose of this study was to investigate the biological activities of an aqueous extract of Angelica gigas (Ag) fermented by Saccharomyces cerevisiae (Sc). First, the soluble solids of the F/3 group, in which the Ag was fermented by Sc for 3 days, decreased from 1°Bx to 0.9°Bx. On the other hand, the pH increased with the number of days of fermentation. The result of a TLC experiment confirmed that it gradually decomposed into a low-molecular weight sugar form upon fermentation. The total phenolic compounds and flavonoid contents were higher in the fermented group than in the non-fermented group. K and Ca contents were increased by fermentation in the following order: F/3, NF, and F/0 groups. Decursin and decursinol angelate contents were highest in the F/3 group. The DPPH (α, α’-diphenyl-β-picrylhydrazyl) radical scavenging activity of the NF, F/0, and F/3 groups were 41.89%, 39.51%, and 60.26%, respectively. The inhibition activities of tyrosinase and lipoxygenase were stronger in the F/3 group than in the NF group. This experiment showed that the fermentation of Ag Nakai can lead to an increase in its antioxidant ability, physiological activity, whitening and anti- inflammatory effects. Thus, this oriental herbal medicine can be developed into a functional material that can be utilized in the development of cosmetic products in future.