http://chineseinput.net/에서 pinyin(병음)방식으로 중국어를 변환할 수 있습니다.
변환된 중국어를 복사하여 사용하시면 됩니다.
- 中文 을 입력하시려면 zhongwen을 입력하시고 space를누르시면됩니다.
- 北京 을 입력하시려면 beijing을 입력하시고 space를 누르시면 됩니다.
RISS 인기검색어
- 검색키워드
- 저자 : 정해영 (검색결과 481 건)
- 무료
- 기관 내 무료
- 유료
-
-
Mie(p,6) 포텐셜을 갖는 Cell이론을 이용한 포화탄화수소 혼합물의 열역학적 성질에 대한 연구
정해영 德成女子大學校 2005 德成女大論文集 Vol.34 No.-
고분자액체의 열역학적인 성질을 설명하기 위하여 많은 이론들이 제안되어 왔다. 이 이론들은 대부분 cell, hole, free volume 또는 격자의 개념에 근거를 두고 있다. 본 연구에서는 Mie(p,6) 포텐셜을 갖는 cell이론을 고분자가 아닌 포화탄화수소 혼합물 n-C_(6)H_(14)+ n-C_(16)H_(34)와 n-C_(8)H_(18) + n-C_(16)H_(34) 계에 적용하여 반발포테셜항의 지수 p 에 따른 혼합부피변화와 혼합엔탈피변화를 계산하고 실험값과 비교하여 보았다. Many theories have been suggested to explain thermodynamic properites of polymeric liquids. Most of the theories are based on the concepts of cell, hole ,free volume or lattice. In this work, the author applied the cell theory of Mie(p,6) potential to hydrocarbon mixtures, n-C_(6)H_(14)+ n-C_(16)H_(34) and n-C_(8)H_(18) + n-C_(16)H_(34) systems rather than polymers to calculate their volume and enthalpy changes of mixing and to compare them with experimental data.
-
정해영,이길근,Jeong, Hae-Young,Lee, Gil-Geun 한국분말야금학회 2016 한국분말재료학회지 (KPMI) Vol.23 No.1
This study focuses on fabricating silver flake powder by a mechanical milling process and investigating the formation of flake-shaped particles during milling. The silver flake powder is fabricated by varying the mechanical milling parameters such as the amount of powder, ball size, impeller rotation speed, and milling time of the attrition ballmill. The particle size of the silver flake powder decreases with increasing amount of powder; however, it increases with increasing impeller rotation speed. The change in the particle size of the silver flake powder is analyzed based on elastic collision between the balls, taking energy loss of the balls due to the powder into consideration. The change in the particle size of the silver flake powder with mechanical milling parameters is consistent with the change in the diameter of the elastic deformation contact area of the ball, due to the collision between the balls, with milling parameters. The flake-shaped silver particles are formed at the elastic deformation contact area of the ball due to the collision.
-
-
Mie(p,6) 포텐셜을 사용한 고분자 glassy 상태의 PVT계산
정해영 덕성여자대학교 자연과학연구소 2005 자연과학 논문집 Vol.11 No.-
고분자이론들은 많은 경우 cell, hole, free volume 또는 lattice 등의 개념에 근거를 두고 있다. 여기에 van der Waals 포텐셜이나 Lennard-Jones 6-12 포텐셜 또는 이를 개선한 형태의 포텐셜을 보통 사용하고 있다. 본 연구에서는 고분자 액체를 설명하는 성공적인 이론으로 알려져 있는 연속격자유체이론과 Dee-Walsch의 Cell 이론, 섭동법을 이용한 Cho-Sanchez 이론에 Mie(p,6) 포텐셜을 적용하여 반발포텐셜항의 지수 p에 따른 고분자 glassy 상태에서의 PVT 값을 계산하여 실험값과 비교를 하였다.
-
Arachidonic acid cascade와 세포간 정보전달
정해영 부산대학교 신약개발연구소 1989 藥學硏究誌 Vol.23 No.2
Hormone이나 신경전달물질 등의 세포의 인자정보가 세포내에 전달됨에 따라 장기나 세포에서 특유의 생리활성물질이 신속히 생성되어, 그 주변조직이나 세포에 작용해서 세포기능을 조절한다. 이러한 물질들을 autacoid라고 하는데, 그 중 1군의 화합물에 arachidonic acid 대사산물이 있다. 이 arachidonic acid에 유래하는 생리활성물질들을 eicosanoid 혹은 prostanoid라고 부르고 이 arachidonic acid를 모체로 만들어지는 관련 화합물의 생합성 경로를 arachidonic acid cascade 라고 한다. Prostanoid는 생체내 거의 모든 조직에서 만들어져 세포기능의 발현과 조절에 중요한 역할을 하며, 현재 생물학에서 의약학 영역에까지 큰 주목을 받고 있는 생물 정보전달물이다. 본 고에서는 prostanoid의 역사, 구조, 생합성, 생리활성 및 receptor 와 정보전달의 mechanism 에 대해서 개설하고자 한다.
-
전통차류의 Peroxynitrite 및 활성산소종 제거활성
정해영 仁濟大學校食品科學硏究所 2000 仁濟食品科學FORUM論叢 Vol.- No.8
Reactive oxygen species(ROS : O₂-, H₂O₂, ·OH) and peroxynitrite (ONOO-) are proposed as agints attacking fatty acids in cells, tissues, of organism(including human beings), giving rise to and oxidative damage of biologically important molecules. Especially, ONOO- formed from superoxide(O₂-) and nitric oxide(NO·) acts as a strong cytotoxicant giving carcinogenesis, cell death and low density lipoprotein oxidation. Green tea is now one of the most popular consumed beverage in the world. Some major green tea catechins are(-)-epicatechin 3-O-gallate(ECG), (-)-gallocatechin 3-)-gallate(GCG), (-)-epigallocatechin 3-O- gallate(EGCG), (-)-epigallocatechin(EGC), (-)-epicatechin(EC), and (+)-catechin(C). Green tea and its components have a wide range of biological and pharmacological activities that may contribute to chemopreventive effects. In the present study, 21 kinds of several teas including cereal teas, fruit teas, leaf teas and root teas were screened for the scavenging effects against peroxynitrite formation by SIN-1 and peroxynitrite itself. Green tea showed the strongest peroxynitrite scavenging activity. In addition, among the green tea compoments, catechins with galloyl group inhibited peroxynitrite formation by SIN-1 and scavenged peroxynitrite itself. Especially, when compared with phenicillamine as a positive GCG and EGCG, which have two galloyl groups showed the most potent peroxynitrite scavenging, which indicates that galloyl group maybe contribute to peroxynitrite scavenging activity. Moreover, 21 kinds of teas including cereal teas, fruit teas, leaf teas and root teas were screened for the scavenging effects against total free radical formation. Among the several teas and constituents, green tea and ECG, GCG, EGCG from greentea showed the strongest scavenging activity respectively. To elucidate the mechanism of scavenging activity, the effects of ECG, GCG, EGCG on ROS(O₂-, H₂O₂, ·OH) were investigated. EGCG showed remarkably scavenging activity aganist O₂- and H₂O₂. Also GCG had the strongest scavenging activity against ·OH. The treatment with ECG, GCG, and EGCG reduced cell damage induced by SIN-1, AMVN, H₂O₂ and t-BHP in cultured AcF2 liver cell. But, in case of SNP, cell viability was not dependent on concentration and green tea components. Therefore, we can postulated that green tea components inhibited peroxynitrite formation through their O₂- scavenging activity. In vivo assay, peroxynitrite level, total free radical generation, AAPH-induced TBARS and TBARS itself were increased by t-BHP(120mg/kg, i.p.) and SIN-1(100mg/kg,i.p.), but 2-BE(120mg/kg t-BHP, i.p. + 2mg/kg EGCG, i.p.), 10-BE(120mg/kg t-BHP, i.p. + 10mg/kg EGCG, i.p.), 2-SE(100mg/kg SIN-1, i.p. + 2mg/kg EGCG, i.p.), and 10-SE(100mg/kg SIN-1, i.p. + 10mg/kg EGCG, i.p.) were decreased in dose-independent manner. Namely, EGCG isolated form green tea strongly inhibited lipid peroxidation and total free radical generation in rat liver. These results suggested that ECG, GCG, and EGCG isolated from green tea might show cytoprotective action through antioxidant and perosynitrite scavenging activity.
-
-
고분자이론을 이용한 포화탄화수소 혼합물의 열역학적 성질에 대한 연구
정해영 덕성여자대학교 자연과학연구소 1996 자연과학 논문집 Vol.2 No.-
Many theories have been suggested to explain thermodynamic properites of polymeric liquids. Most of the theories are based on the concepts of cell, hole, free volume or lattice. In this work, the author applied several such polymer theories to hydrocarbon mixtures, n-C_6H_14 + n-C_16H_34 and n-C_8H_18 + n-C_16H_34 systems rather than polymers to calculate their volume and enthalpy changes of mixing and to compare them with experimental data. The results showed that Van der Waals potential is more realistic than Lennard-Jone 6-12 potential in hydrocarbons differently from polymers.
-
연관 검색어 추천
이 검색어로 많이 본 자료
활용도 높은 자료
