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Carbamoylethyl Starch의 製造와 종이 製造時 添加效果에 관한 硏究
尹世永,崔正箕,鄭文箕,趙炳默,吳正壽 동국대학교 생명자원과학대학 연습림 1995 연습림논문집 Vol.- No.4
Recently, paper strength properties come up to be lowered by increasing ratio of utilization of recycling paper. In order to overcome these problems, strengthening agents which may cause enviromental problems have been used. Therefore, acrylamide was added to starch which is a cheap natural polymer, carbamoylethyl starch(CES) with high activity was prepared, and so the applicability as a paper additive was examined. The results are following; FT-IR spectra of CES of which degree of substitution was 0.25 showed strong C=O band at 1680㎝^-1 which corresponds the carbonyl group n amides(amide Ⅰ). Analysis of bravender viscosity showed that cooking start point of CES is 60℃ and instant viscosity is 830 B.U.(bravender unit). Effect of carbamoylethl DS on strength properties was resulted that CES of DS 0.20 appeared to be the best choice for making handsheets from KOCC with good overall strength properties, and it was selected as standard sample. Effect of pH on strength properties was obvious for their increasing values as decreasing pH. Also, a 5-fold increase in size rate as well as significant increase in wet-tensile strength were obtained in handsheets from KOCC by 3% wet-end addition of CES.
조종수,김사익,윤승락,노정관,나종범,김동귀,최길동 진주산업대학교 산업과학기술연구소 2007 산업과학기술연구소보 Vol.- No.14
To investigate the antimicrobial effects of essential oil in the leaves of Chamaecyparis obtusa extractives by paper disc method, the extractives were fractionated into four portions. In antimicrobial test, essential oil in the leaves of Chamaecyparis obtusa was found to have strong inhibitory effects against the growth of Bacillus subtilis and Staphylococcus aureus. A part of analyzed inhibition components of essential oil in the leaves of Chamaecyparis obtusa from GC-MS was supposed to be α,β-pinene, α-terpinolene, camphor, β-myrcene, 1-α-terpinolene, 4-thujen-2-α-yl, limonene, Cardinene.
간세포암의 고주파 열치료 후 천자침 경로를 통한 전이 1례
조영완,박석주,진한영,김준영,이재익,강명주,박정하,윤정희,박성재,지삼룡,이연재,이상혁,설상영 인제대학교 2006 仁濟醫學 Vol.27 No.-
Radiofrequency ablation(RFA), as a form of minimally invasive therapy for hepatocellular carcinoma, has become an important treatment modality. Because of limitation of surgery, RFA has become standard therapy for hepatocellular carcinoma in some situations. But there are some complications of RFA such as bleeding, infection, hematoma, adjacent organ thermal damage including intestinal perforation, needle track seeding, and so on. There are few reports in the literature that systematically evaluate the incidence of needle tract seeding and its associated risk factors. And only 2 cases of needle tract seeding of hepatocellular carcinoma after RFA were reported in Korea. We report a case of needle tract seeding of hepatocellular carcinoma after RFA.
잡음제거에 적합한 유전적 연산자 및 미세국부조정에 대한 연구
조영창,윤정오,최병진 경운대학교 산업기술연구소 1999 産業技術硏究論文誌 Vol.1 No.1(B)
In this paper, we introduce the genetic algorithm and propose the genetic operators, crossover and mutation, suited for gray scaled image restoration in order to find the global optima among many local optima in the solution space. And we also proposed the local fine tuning of window size and visit number for delicate searching mechanism in the vicinity of the global solution. Through the experimental results we verified the effectiveness of the proposed genetic operators on the gray scaled images over the conventional ones, as well as the improved performance of local fine tuning.
간세포암종에 대한 간동맥 화학색전술 후 발생한 급성호흡곤란증후군
조윤원,이정미,최자윤,유동훈,차라리,오혜원,김홍준,민현주,김현진,정운태,이옥재,하창윤,이선영 이화여자대학교 의과학연구소 2013 EMJ (Ewha medical journal) Vol.36 No.1
Transcatheter arterial chemoembolization (TACE) has become an effective alternative treatment strategy for patients with inoperable hepatocellular carcinoma (HCC). Although TACE is relatively safe, acute respiratory distress syndrome associated with pulmonary lipiodol embolism is a rare and potentially fatal complication. We report a rare case of acute respiratory distress syndrome after TACE for inoperable HCC. A 75-year-old man, with huge HCC in right lobe, was treated by TACE for the first time. Seven hours after uneventful TACE procedure, he felt dyspneic and his oxygen saturation recorded by pulse oximetry (SpO2) fell to 80% despite of applying non-rebreathing mask. He underwent mechanical ventilation with a protective ventilatory strategy. We experienced a case of acute respiratory distress syndrome after TACE for HCC.
보-기둥 접합부의 이력거동을 고려한 RC 평면골조의 내진해석
조용부,김영곤,우종열,윤정배 慶尙大學校生産技術硏究所 1999 生産技術硏究所論文集 Vol.15 No.-
The analytical studies from the test results are presented. From experimental envelope curve, hysteretic behaviors under cyclic loading are modeled for beam-column subassemblages. Modelled curves show relatively good reproduction for experimental curves. Finally, seismic performances are investigated for 7 story plain framed structure by nonlinear dynamic analysis. The resulting responses are different by each beam-column joint design.
결핵균 30 kDa항원과 Interleukin-2 혹은 Anti-CD28의 병합이 건강인 말초혈액 림프구와 단핵구 증식에 미치는 영향
박정규,윤상호,조은경,김화중,백태현 충남대학교 의과대학 지역사회의학연구소 1994 충남의대잡지 Vol.21 No.2
Cell-mediated immunity is necessary for protection against Mycobacterium tuberculosis. T lymphocytes are thought to play a central role in cell-mediated immune response. And in vitro stimulation of leukocytes with mycobactria or their products induces synthesis and release of several cytokines, including IL-2. To study the T lymphocyte proliferative response to purified 30 kDa antigen from Mycobacterium tuberculosis H37Rv, IL-2 or their combination, peripheral blood lymphocytes and mononuclear cells isolated from healthy subjects were stimulated with the 30 kDa antigen, IL-2 or both. The proliferations of lymphocytes and molnonuclear cells to 30 kDa or 30/32 kDa antigen were significantly increased in PPD(+) group when compared to those in PPD(-) group. It is confirmed here that have shown synergy between 30 kDa antigen and IL-2(250U) in the induction of lymphocytes and mononuclear cells proliferation in PPD(+) group. The proliferative response reflects synergy between two separate activation stimuli. And macrophage-like cells existed in peripheral blood mononuclear cells were shown to help the synergy of the proliferative response to mycobacterial antigen and IL-2. The proliferative responses of lymphocytes and mononuclear cells to 30 kDa antigen were more increased than those to 30/32 kDa antigen. So it was suggested that 30 kDa antigen was the more immunogenic antigen than 30/32 kDa antigen.
위암세포에 의한 종양침윤 림프구의 면역반응 억제기전에 관한 연구
박정규,송규상,서광선,최정목,배진선,장일성,윤완희,노승무,조은경,백태현 大韓免疫學會 1995 大韓免疫學會誌 Vol.17 No.3
Tumor-infiltrating lymphocytes ('1°ILs) interact most closely with tumor cells and thus are more likely to reflect tumor host interactions accurately. But it is unknown whether such T cells are nonspecific inflammatory cells or a subset of specific host immune responses. In this study, there was no clear correlation between the infiltration of T lymphocytes in stomach cancer and the overexpression of c-ErbB-2 or increasing class I MHC expression on tumor cells. A positive correlation was seen between the presence of TILs in the tumor and tumors with diploidy by flow cytometric DNA analysis. The proliferative responses of Ills stimulated with IL-2, anti-CD3 mAb, or both were examined. When compared to normal mucosal-associated lymphoid tissue lymphocytes, the proliferative response of TILs to high dose IL-2 was minimal. A similarly poor response to anti-CD3 mAb plus IL-2 was also observed. The freshly isolated TILs exhibit reduced ability to proliferate in response to IL-2, anti-CD3 mAb or both. The microenvironment of the tumor suppresses the proliferative capacity of the TILs. The mechanism of this suppression remains unknown. It could be mediated by suppressor cells, by soluble substances within the tumor, or both. To examine this question, supernatants of stomach cancer cells (SNSNU-1) were tested for the presence of immunosuppressive factors. Human peripheral blood T-cells and tumor-draining lymph node lymphocytes (TDLNL) were incubated for 3 days with SNSNU-1 and then assessed for proliferative responses to PMA, anti-CD28 mAb, or both and for the inducibility to express IFN- r or IL-4 mRNA to PMA. Peripheral blood T-cells pretreated with SNSNU-1 were unable to proliferate in response to PMA, anti-CD28 mAb or both. SNSNU-1 also produces inhibitory activities of TDLNL proliferative response to PMA or anti-CD28 mAb and PMA (49%, 52%, respectively). In contrast, culture supernatants obtained from HEp-2, K562 or Daudi showed normal proliferative responsiveness of peripheral blood T-cells and TDLNL by PMA, anti-CD28 mAb or both.
나종범,김사익,조종수,윤승락,노정관,김동귀,최길동 진주산업대학교 산업과학기술연구소 2007 산업과학기술연구소보 Vol.- No.14
This study was performed to investigate the effect of wax layer of bamboo on leaching of boron compounds. The removal of wax layer increased the loading of boron on bamboo surface. However, it had an effect on increasing the leaching rates of boron compounds during leaching test. The addition of water repellent retarded leaching of boron compounds to some extent from treated samples. Although borate/WRP system did not qualify borate treated wood for ground contact use, it showed a potential to improve performance of borate treated bamboo in above-ground applications not subjected to continuous wetting conditions.