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Ryu, BoMi,Choi, Il-Whan,Qian, Zhong-Ji,Heo, Soo-Jin,Kang, Do-Hyung,Oh, Chulhong,Jeon, You-Jin,Jang, Chul Ho,Park, Won Sun,Kang, Kyong-Hwa,Je, Jae-Young,Kim, Se-Kwon,Kim, Young-Mog,Ko, Seok-Chun,Kim, G The Korean Society of Phycology 2014 ALGAE Vol.29 No.4
Despite the extensive literature on marine algae over the past few decades, a paucity of published research and studies exists on red algae. The purpose of this study was to evaluate the potential therapeutic properties of the ethanol extract of the red alga Callophyllis japonica against lipopolysaccharide (LPS)-stimulated macrophage inflammation. The C. japonica extract (CJE) significantly inhibited the nitric oxide (NO) production and the induced dose-dependent reduction of the protein and mRNA levels of inducible nitric oxide synthase and cyclooxygenase-2. Additionally, the CJE reduced the mRNA levels of inflammatory cytokines, including tumor necrosis factor-${\alpha}$, interleukin (IL)-$1{\beta}$, and IL-6. We investigated the mechanism by which the CJE inhibits NO by examining the level of mitogen-activated protein kinases (MAPKs) activation, which is an inflammation-induced signaling pathway in macrophages. The CJE significantly suppressed the LPS-induced phosphorylation of c-Jun N-terminal kinase, extracellular signal-regulated kinase and p38 MAPK. Taken together, the results of this study demonstrate that the CJE inhibits LPS-induced inflammation by blocking the MAPK pathway in macrophages.
김도일,정경환,김종호,서곤 전남대학교 촉매연구소 2001 觸媒硏究 論文集 Vol.22 No.-
Dealkylation of m-diisopropylbenzene (m-DIPB) was studied on various zeolite catalysts which have different pore structures. The very low dealkylation activity was observed on MFI zeolite because of its small pore size. The m-DIPB low conversions of MOR and FAU zeolites were due to severe deactivation of the catalysts by carbon deposites. On the other hand, the high conversion and the low deactivation in the m-DIPB dealkylation were observed on BEA zeolite with bent pores and MWW zeolite with pillow-type pores. In particular, the MWW zeolite shows a very high conversion, because the polymerization of m-DIPB resulting to carbon deposites is suppressed by sharing one m-DIPB molecule per unit pore. The high selectivity for benzene on MWW zeolite is explained by long retention time of reaction intermediate inducing consecutive dealkylation.
이상일,서석훈,홍경민,신용섭,장상희,신부영 영남대학교 공업기술연구소 2001 工業技術硏究所論文集 Vol.29 No.1
Bio-and-photodegradable polymer composites were prepared by blending biodegradable aliphatic polyester and photodegradable master batch(M/B). Photodegradability, biodegradability, thermal properties and mechanical properties were investigated. The biodegradability of EnPol(G4600) composites decreased wish increasing the amount of M/B, while that of EnPol(G8000) composites increased. Tensile strength and elongation decreased with increasing the time of outdoor exposure and the amount of M/B but modulus comparatively maintained. The mechenical properties decreased as the content of M/B increased, while the melting temperature unchanged.
HFC-134a와 대체냉매 HFC-152a에 CF_3I를 혼합한 자동차냉매 특성
권일욱,박찬수,홍경한,문기선,최운수,서의경,윤갑식,이종인,하옥남 朝鮮大學校 機械技術硏究所 2002 機械技術硏究 Vol.5 No.1
These days, an attention of environment has been increasing all over the world. to prevent the green house effect and destruction of an ozone layer, an ozone destruction potential(ODP) be zero and a refrigerant for low global warming potential(GWP) is needed. HFC-134a, in which hydrogen is mixed instead of chlorine is a refrigerant used for automobile conditioners and its destruction potential is ecologically zero. However, it is not considered as a perfect substitutive refrigerant as its GWP is high. It is studied refrigerant mixtures in which HFC-134a, HFC-152a and CF_3I with low GWP and zero ODP are mixed by experimentally and concluded as follows; 1. with the variation of speed of compressor outside temperature and flow rate, the heat of evaporator and compressor and coefficient of performance was varied, and influenced the air conditioner. 2. The pressure of evaporator was decreased with increasing the speed of compressor and that of the refrigerant HFC-134a was higher 21% than that of azotrope refrigerant mixed with CF_3I. The overall capacity of condensor and evaporator was increased and HGC-134a was higher than azotrope refrigerant mixed with CF_3I 3. The capacity of evaporator with the refrigerant HFC-134a was higher 6% than azotrope refrigerant mixed with CF31 and the required power with zaotrope refrigerant mixed with CF_3I was higher 11% than that of HFC-134a. 4. The COP of the refrigerant FHC-134a was higher 31% in 1000RPM. when outside temperature was increased, COP was decreased. 5. Performance of HFC-134a is better than azotrope refrigerant mixed with CF_3I but prefered zaotrope refrigerant mixed with CF_3I considering the environment.
송일호,신경수 한국생산성학회 2003 生産性論集 Vol.17 No.1
The purpose of this study is to investigate the productivity gap by job segregation based upon the gender composition of occupations in Korea. According to Human Capital Theory, the differentials of human capital investments result in productivity gap which affects individuals' income. Therefore, it can be explained that and individual inmale jobs earns more than in a female jobs because of productivity differences between men and women. The empiricl results of this study can be summaried as the following : In general, there are no common results in Index of Sex Segregation. In addition, the wage gap by gender in OCC4(skilled labor in agriculture, fishery, and forest) is the highest among the all occupations; however, the wage gap in OCC3(services and sales) is not singificantlydifferent. Moreover, the productivity gap by gender in OCC4 is the highest among the all occupations; howemve, the productivity gap in OCC3 is not significantly different. These empirical results support Human Capital Theory.
이은미,박종희,경기열,전일순,조혜정,지웅길 충남대학교 약학대학 의약품개발연구소 2004 藥學論文集 Vol.19 No.-
The aim of this study was to improve the moisturizing and water retaining effects of a gel containing poloxamer 407, glycerin, sod hyaluronate, sorbo(sorbitol 70%). Topical preparations were formulated as a gel containing different concentration poloxamer 407, glycerin, sod. hyaluronate, sorbo(sorbito1 70%), lipid(ceramide. sphingosine ratio 1:l). We tested a various combination of different additives for the moisturizing effect The water holding capacity of the mixture was measured using a moisture analyzer. In vivo test was carried out on human skin using Skicon-200 and water retaining effect was increased by addition of lipid. Water evaporation test was performed by various concentration of additives and water evaporation characteristics of the preparations were determined using the moisture analyzer. Moisturizing and water retaining effects was increased by adequate combination of various additives with topical gel formulations.
播種期 移動에 따른 차풀의 生育反應, 收量 및 粗成分 變化
玄京卓,趙南棋,吳恩敬,高志棅,趙英一 濟州大學校 亞熱帶農業硏究所 1999 亞熱帶農業硏究 Vol.16 No.-
ABSTRACT This study was conducted to determine influence of planting date, seeding rate and phosphate rate on main growth, characters, yield and chemical composition of senna from March 11, 1998 to December in Cheju Province. Days to flowering was lessened as planting date was delayed. The plant height of senna was the longest at 31 March planting (99cm) than at the other planting date. Stem diameter, number of leaves were increased at 31 March but number of branches was not affected by planting date. And number of withering leaves were increased as planting date was earlier. Fresh forage yield per lOa, for senna was the greatest (4,660kg) at 31 March planting, the second was 4,397kg at 1 April planting and the reduced the 3,473kg at 11 March planting. Also dry matter yield per lOa, crude protein yield and total digestable nutrient (TDN) yield was nearly the same tendency. Crude protein, crude fat percent was the greastest at 11 March planting and than decreased with further increased at planting date. Crude ash and crude fiber percent was decreased tendency as planting date was delayed. Nitrogen free extract (NFE), TDN percent was increased tendency as planting date was delayed. SPAD reading value of leaves had an efficiency increased as planting date was delayed.