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광양만 및 가막만의 유기염소계 화합물 분포에 관한 연구
김종희(J.H.Kim),조현서(H.S.Cho),유준(J.Yu),최윤석(Y.S.Choi),정창수(C.S.Jung) 한국해양환경·에너지학회 2006 한국해양환경·에너지학회 학술대회논문집 Vol.2006 No.-
PCBs 및 유기염소계 농약과 같은 유기염소계 화합물은 매우 안정하여 해양환경 중에 유입되면 장기간 잔류하게 된다. 이러한 유기염소계 화합물은 다양한 목적으로 광범위하게 이용되어져 왔으며 극지방 및 대양의 다양한 매질에서도 검출이 되고 있다. 특히 이들 화합물은 소수성으로 해양환경에 유입되면 입자에 흡착하여 퇴적층에 축적되어진다. 본 연구에서는 지형학적으로 반 폐쇄적이며, 주변 공업단지와 농경지에 의해 유기염소계 화합물의 오염 우려지역으로 예상되는 광양만과 가막만을 선정해 표층퇴적물 중 유기염소계 화합물을 조사하석 시ㆍ공간적인 잔류농도 및 분포특성을 파악하였다 광양만과 가막만의 표층퇴적물 중 PCBs 농도범위는 각각 0.18~0.99(평균 0.51±0.06)ng/g dryㆍwt, 0.02~0.70(평균 0.18±0.02)ng/g dryㆍwt.였다. 광양만의 지형학적 구조와 주변 산업 활동에도 불구하고 표층퇴적물의 PCBs 화합물 농도는 국내 주요 산업 항만인 부산, 을산, 영일만에 비해 대체로 낮은 농도 수준이었으며, NOAA의 ER-L보다 낮은 농도분포를 보였다. 광양만의 표층 퇴적물 중 PCBs congeners 분포패턴은 tetra-CB >hepta-CB >tri-CB >penta-CB >nona-CB >deca-CB >hexa-CB 순으로 tetra-CB가 우세하게 나타났다. 광양만은 저염소화 PCBs인 tri-CB, tetra-CB가 높게 나타나 신규 유입이 있을 것으로 사료되어진다. 가막만 표층퇴적물의 PCBs congeners 분포는 penta-CB, hexa-CB, hepta-CB가 검출되었으며 다른 congener는 분포하지 않았다. 광양만과는 상이하게 저염소화 화합물이 존재하지 않아 가막만은 PCBs의 신규 유입은 없는 것으로 나타났다. 광양만 표층퇴적물의 유기염소계 농약인 DDTs와 HCHs의 농도는 각각 ND~0.10(평균 0.06±0.01)ng/g dryㆍwt., ND~0.59(평균 0.24±0.04)ng/g dryㆍwt.로 나타났다. 조사 해역 모두에서 ,p'-DDE가 DDTs 동위체의 대부분을 차지하고 있었으며, HCHs의 경우 γ-HCH가 대부분을 차지하였다. 대부분의 정점에서 ER-L 농도 이하의 값을 보여 광양만 유기염소계 농약의 농도는 우려할 만한 수준은 아니었다. 가막만 표층퇴적물의 유기염소계 농약인 DDTs와 HCHs의 농도는 각각 ND~1.68(평균 0.28±0.06)ng/g dryㆍwt., ND~4.75(평균1.07±0.12)ng/g dryㆍwt.로 나타났다. DDTs의 경우 평균 구성비는 p,'-DDE가 전체 DDT 분해산물 중 76%를 차지하고 있었으며, p,p'-DDD가 17%를 차지하였다. HCHs의 경우 β-HCH와 γ-HCH가 대부분을 차지하고 있었다. 대부분의 정점에서 ER-L 농도 이하의 값을 보여 가막만 유기염소계 농약의 농도는 우려할 만한 수준은 아니었다. Organochlorine compounds such as polychlorinated biphenyls (PCBs) from industrial sources, hexachlorocyclohexanes(HCHs) and DDTs from agricultural activities and their metabolites are ubiquitous, persistent, toxic and bioaccumulative in the marine environment due to their unique chemical properties. There are several input mechanisms that lead to the deposition of organochlorine compounds in the environment. These include urban runoff, municipal sewage, industrial waste, outflow from agricultural area, chemical spill, and atmospheric deposition. In this study five sediments samples were collected from Gwangyang Bay and Camak Bay to survey the spatial distribution pattern of organochlorine compounds in a semi -enclosed bay system Organochlorine compounds in sediments were extracted using dichloromethane and purified using florisil column. Individual compounds were detected using a gas chromatography/ electron capture detector(GC/ECD) for quantification. The concentrations of PCBs in sediments from Gwangyang Bay and Gamak Bay ranged from 0.18 to 0.99ng/g dryㆍwt., and from 0.02 to 0.70ng/g dryㆍwt., respectively. The concentrations of PCBs appeared to be higher than the sites of active industrial activities. Mean concentrations of PCBs in sediments were less than Effect Range Low(ER-L) values suggested by NOAA in US. The concentration of DDTs in sediments from Gwangyang Bay and Gamak Bay ranged from ND to 0.10ng/g dryㆍwt., and from ND to 1.68ng/g dryㆍwt., respectively. p,p'-DDE appeared to be the dominant isomer among DDT isomers in sediments from Gwangyang Bay. The percentage composition of p,p'-DDE and p,p'-DDD concentration in Gamak Bay were 76%, 17%, respectively. Mean concentrations of DDTs in this study were less than Effect Range Low(ER-L) values suggested by NOAA in US. The concentrations of HCHs in sediments from Gwangyang Bay and Gamak Bay ranged from ND to 0.59ng/g dryㆍwt., and from ND to 4.75ng/g dryㆍwt., respectively. γ-HCH were the major components of HCH compounds in Gwangyang Bay. The concentrations of PCBs in this study are lower concentration range than Daya Bay, Osaka Bay and Bohai sea. In addition, concentrations of PCBs in this study are below ER-L value.
최형규(H. K. Choi),이현진(H. J. Lee),김종희(J. H. Kim),이상화(S. H. Lee),정은희(E. H. Jung),최양일(Y. I. Choi) 충북대학교 동물생명과학연구소 2014 동물생명과학연구 Vol.6 No.-
This study was conducted to evaluate the combined effects of sodium chloride(NaCl) replacements, including sodium lactate(Na-lactate), potassium chloride(KCl), magnesium chloride(MgCl₂) and salicornia herbacesa powder(SHP), on the quality characteristics of ground pork. Ground porks were mixed in 7 treatments: T1(no additive), T2(2.0% NaCl), T3(1.4% NaCl + 0.6% KCl), T4(1.4% NaCl + 0.6% CaCl2), T5(1.4% NaCl + 0.6% MgCl2), T6(1.4% NaCl + 0.6% Na-lactate) and T7(1.4% NaCl + 0.6% SHP). In the color, SHP in T7(1.4% NaCl + 0.6% SHP) significantly decreased the L and a values of ground pork compared to other treatments. Compared to the control (T1), addition of CaCl₂ or MgCl₂ significantly decreased the pH values of ground pork, whereas addition of Na-lactate or SHP significantly decreased the salinity values of ground pork. Among treatments, addition of CaCl₂ resulted in adverse effects in texture profile analysis and emulsion stability values of ground pork. During the cooler storage, there were no significant differences in the storage characteristics among treatments. As a result, the use of sodium chloride replacements except CaCl₂ could be a good way to reduce the NaCl content in ground pork and addition level of SHP should be reduced because of color problem.
최현수(H. S. Choi),최영석(Y. S. Choi),최형규(H. G. Choi),이주호(J. H. Lee),김종희(J. H. Kim),최양일(Y. I. Choi) 충북대학교 동물생명과학연구소 2015 동물생명과학연구 Vol.7 No.-
This study was conducted to evaluate the quality characteristics of blended pork meat by addition of dietary fiber. Blended pork meats included 7 treatments : Control, Chicory fiber 1%, Chicory fiber 3%, Wheat fiber 1%, Wheat fiber 3%, Brown rice bran fiber 1% and Brown rice bran fiber 3%. In the proximate analysis, there were significant(p<0.05) differences, but differences were small. Addition of dietary fiber significantly(p<0.05) increased water holding capacity (WHC) and pH. However, there was no significant(p>0.05) difference in cooking loss. In the emulsification stability including water, fat, and total exudation, there were significant(p<0.05) differences among the treatments. The addition of dietary fiber significantly(p<0.05) increased the springiness, cohesiveness, chewiness and hardness values. As a result, it was determined that the dietary fiber addition had a positive effect on the quality characteristics of blended pork meat, and further research related to storage and sensory characteristics is needed.
권용진,김대회,김종희,오성찬,함제석,문진영,Y.J. Kwon,D.H. Kim,J.H. Kim,S.C. Oh,J.S. Ham,J.Y. Moon 한국전자통신연구원 2023 전자통신동향분석 Vol.38 No.6
Visual relationship understanding in computer vision allows to recognize meaningful relationships between objects in a scene. This technology enables the extraction of representative information within visual content. We discuss the technology of visual relationship understanding, specifically focusing on videos. We first introduce visual relationship understanding concepts in videos and then explore the latest existing techniques. Next, we present benchmark datasets commonly used in video visual relationship understanding. Finally, we discuss future research directions in video visual relationship understanding.
Mn 및 La - Mn 치환 Sr 페라이트의 자기적 특성 변화
장세동(S. D. Jang),김종오(C. O. Kim),김종희(J.H. Kim) 한국자기학회 2001 韓國磁氣學會誌 Vol.11 No.6
These experiments were carried out to examine the effects of elemental substitution of Mn and La-Mn on Sr-ferrite. The calcined properties for the Mn and La-Mn substitution were examined, and the sintered magnetic properties were compared with the stoichiometric condition. The magnetic properties of calcined SrM and (La-Mn)_(O.3)-SrM composition were as follows, respectively; Ms : 61.06 emu/g, iHc: 4.45 kOe and Ms : 61.16 emu/g, iHc: 4.46 kOe. Also, the sintered ferrite magnets of Mn_(0.3)-SrM and [(La-Mn)_(0.3)-SrM exhibited a similar properties to the stoichiometric composition but the coercivity of (La-Mn)_x-SrM was decreased rapidly with x=0.5.