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Yi, Jin-Mu,Jeong, Hyun-Ja,Shim, Kyung-Shik,Lee, Kang-Yong,Kim, Jeong-Sook,Zheng, Cui,Tomoko, Jippo,Lee, Young-Mi Kyung Hee Oriental Medicine Research Center 2000 International journal of oriental medicine Vol.1 No.2
We compared the effect between CAS and WAS(root, stem) on mast cell-mediated allergic reaction. CAS, WAS-root and WAS-stem, significantly inhibited compound 48/80-induced systemic allergic reaction(1g/kg) and histamine release from RPMC(1mg/ml). CAS, WAS-root and WAS-stem also inhibited passive cutaneous anaphylactic reaction. In addition, IgE-induced $TNF-{\alpha}$ secretion from RBL-2H3 was inhibited by pretreatment of CAS, WAS-root or WAS-stem$(0.01{\mu}g/ml)$. Taken together, inhibitory effect on mast cell-mediated allergic reactions of WAS-root is greater than those of WAS-stem but less than those of CAS.
Cytotoxicity and L-Amino Acid Oxidase Activity of Animal Venoms
Ahn, Mi-Young,Lee, Byung-Mu,Kim, Yeong-Shik The Pharmaceutical Society of Korea 1997 Archives of Pharmacal Research Vol.20 No.1
The cytotoxicity of animal venoms (snakes, insects and marine animals) was measured against SNU-1 (stomach cancer cells) by dye uptake assay (MTT method). And also L-amino acid oxidase (AAO) activity of the venoms was compared. Among them, the venom from Ophiophagus hannah (king cobra) showed a strong AAO activity as well as a high potent cytotoxicity. Cytotoxic protein having a AAO was then partially purified by HPLC-GPC and two fractions (Fr. I and Fr. II) were collected. The $IC_{50}$ values of Fr. I and Fr. II were 0.19 ${\mu}g/ml$ and 1.36 ${\mu}g/ml$, respectively. The results suggested that the cytotoxicity of king cobra venom may be due to its AAO activity.
李鎭局,徐相壽,朴魯峰,李忠鎬,劉鍾哲,金洪奎,趙武濟,韓運東,池平植 충주대 2003 産業科學論文集 Vol.11 No.-
In this paper, we discuss actual conditions for running school of electrical and electronic engineering in domestic universities. Also, we catch hold of industrial circles's demands in electrical engineering education and analyze questionary results according to goes into effect school of electrical and electronic & information engineering in major of electrical and electronec engineering's students. Conclusively, we present suitable model in electrical engineering by correction of problems.
Kim, Ki Mo,Kim, No Soo,Kim, Jinhee,Park, Jong-Shik,Yi, Jin Mu,Lee, Jun,Bang, Ok-Sun Lawrence Erlbaum Associates, Publishers [etc.] 2013 Nutrition and cancer Vol.65 No.8
<P>Magnolol, a hydroxylated biphenyl compound isolated from Magnolia officinalis, has been reported to possess anticancer activity. Recent studies have also demonstrated that magnolol inhibits cell growth and induces the apoptosis of cancer cells. However, the effects of magnolol on vascular endothelial growth factor (VEGF)-induced angiogenesis in endothelial cells have not been studied. In the present study, we have used human umbilical vein endothelial cells (HUVECs) to investigate the antiangiogenic effect and molecular mechanism of magnolol. Magnolol inhibited the VEGF-induced proliferation, chemotactic motility and tube formation of HUVECs in vitro as well as the vessel sprouting of the aorta ex vivo. Furthermore, magnolol inhibited VEGF-induced Ras activation and subsequently suppressed extracellular signal-regulated kinase (ERK), phosphatidylinositol-3-kinase (PI3K)/Akt and p38, but not Src and focal adhesion kinase (FAK). Interestingly, the knockdown of Ras by short interfering RNA produced inhibitory effects that were similar to the effects of magnolol on VEGF-induced angiogenic signaling events, such as ERK and Akt/eNOS activation, and resulted in the inhibition of proliferation, migration, and vessel sprouting in HUVECs. In combination, these results demonstrate that magnolol is an inhibitor of angiogenesis and suggest that this compound could be a potential candidate in the treatment of angiogenesis-related diseases.</P>
김태식 ( Tae-shik Kim ),김경자 ( Kyoung-ja Kim ),장태무 ( Tae-mu Chang ) 한국정보처리학회 2004 한국정보처리학회 학술대회논문집 Vol.11 No.2
역할 기반 접근 제어(Role-Based Access Control)는 방대한 조직체계의 효율적인 운영을 위한 접근 제어 모델로써 기존의 임의적 접근 제어(Discretionary Access Control)나 강제적 접근 제어(Mandatory Access Control)에 대한 대안으로 대두되고 있다. 본 논문에서는 권한 위임에 중점을 두어, 관리자는 모든 역할과 권한을 관리할 수 있는 역할을 가지며, 각 위임자는 자신의 권한을 제3자에게 위임을 하고자 하는 경우에는 관리자의 동의 하에 백업 본을 생성하여 위임을 하고 또한 위임한 권한에 대하여 폐지를 할 수 있는 모델을 제안하고자 한다. 또한 기존의 다른 역할 위임 기법과의 비교 분석을 통하여 본 논문에서의 기법이 다른 위임 기법과의 차별됨을 보인다.
Surface and Interfacial Energetic Analysis of Amphiphilic Copolymers
Kim, Min-Kyun,Yuk, Soon-Hong,Jhon, Mu-Shik Korean Chemical Society 1987 Bulletin of the Korean Chemical Society Vol.8 No.3
A Series of hydrophilic-hydrophobic copolymeric surfaces of 2-hydroxyethyl methacrylate (HEMA) and various alkyl methacrylate (RMA) have been prepared by in-situ solution copolymerization using a redox radical initiator. Contact angles of various probing fluids on the polymeric surfaces were determined in air (hydrophobic environment) and under water (hydrophilic environment). From contact angle data, the dispersive interaction contribution (${\gamma}^d_s$) and the polar contribution (${\gamma}^p_s$) to the total surface free energy (${\gamma}^d_s$) and interfacial energetic quantities (e.g., water-polymer, liquid-polymer interface, etc.) were estimated by surface and interface physicochemical theory. From the comparison of surface energetic components between hydrophobic and hydrophilic media, it is found that surface and interface energetic components of polymeric surface as a representative low-energy surface are highly dependent on environmental fluids. Also, from the correlation between interfacial energetic results and surface energetic criterion of biocompatibility, we found that HEMA/BMA, HEMA/HMA copolymer systems are in the region of biocompatibility.
Kim, Whan-Gun,Jhon, Mu-Shik Korean Chemical Society 1985 Bulletin of the Korean Chemical Society Vol.6 No.3
A series of copolymer membranes of 2-hydroxyethylmethacrylate (HEMA) with selected hydrophobic monomers were prepared without crosslinking agents. The equilibrium water content, the partition coefficient, and the permeability of the solutes such as urea, methylurea, 1,3-di-methylurea, and acetamide via these membranes were measured. The partition coefficient data show that as the hydrophobicity of solutes increased, the partition of solutes were dictated by hydrophobic interaction between solute and polymer matrix. Diffusion coefficients obtained in these experiments decrease as the water content of polymer membrane decreases. This decrease is blunt as the excess heat capacities, ${\phi}C^0_p$ (excess) in aqueous solution at infinite dilution of solute increases. To investigate the relationship between water content and diffusion coefficient, the results of the diffusion experiments were examined in light of a free-volume model of diffusive transport. The remarkable increase of urea mobility in the polymer network containing relatively larger bulk water can be considered as water structure breaking effect.