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      • 전국 주요 시장에서 시판 중인 진주담치에 함유된 마비성 패독에 관한 조사 연구

        이채언,이종태,조규일,정귀원,문덕환,신해림,김공현,배기택,김용완,백낙환 인제대학교 1990 仁濟醫學 Vol.11 No.1

        마비성 패독(paralytic shellfish poison)은 강력한 자연계 신경독으로 먹이연쇄를 통해 패류에 축적되며 이를 인간이나 동물이 섭취할 경우 마비성 패류 중독(paralytic shellfish poisoning)을 발생하게 된다. 마비성 패류 중독은 미국, 캐나다 및 일본 등지에서 비교적 호발하고 있으나, 우리나라의 경우 최초의 공식 보고는 1986년 4월 부산지역에서 발생된 집단 중독례로 원인 패류는 진주담치(blue mussel, Mytilus edulis)였다. 본 조사자들은 1989년 4월부터 7월까지 전국 주요 시장 38개소에서 시판 중인 진주담치를 수거하여 mouse bioassay를 이용하여 마비성 패독 함유량을 산정하였기에 보고하고자 한다. Bioassays on paralytic shellfish poison(PSP) in blue mussels(Mytilus edulis) were earned out. The subject matters were collected from 38 markets of 26 places throughout the country, during the period of April to July, 1989. At the time of collection, they were classified into two groups by their sites produced either natural or cultured. As a result, it was identified that two subject matters which were collected from markets of both Boryong and Chinhae contained PSP. The PSP toxicity scores were 47.97㎍/100gm meat in Boryong, 48.84㎍/100gm meat in Chinhae respectively, which are much lower than the level of lethal dose. Hewever it is noticeable that blue mussels in markets contained PSP, which may increase the risk of paralytic shellfish poisoning. From the view point of public health, control measures for preventing paralytic shellfish poisoning are necessary.

      • 제주도 감귤원 토양의 V.A-mycorrhizae분포 및 사상균에 의한 인광석의 용해에 관한 연구

        김형옥,유장걸,이신찬,R.M.N. Kucey 제주대학교 1984 논문집 Vol.17 No.-

        The mycorrhizae spore densities (spore numbers/100g soil) were measured on six sites of citrus field by the floating method to estimate the mycorrhizae distniution on volcanic ash soil in Jejudo. Phosphate solubilizing fungi and bacteria in the soils were isolated and selected by the succesive pure culture in the potato dextrose agarcalcium phosphate (PDA-P) media. The phosphate solubilizing capacities of the sele-cted fungi were measured after incubating in the liquid media mixed with 200 mg of powdered rock phos-phate for one week. 1. The highest spore density (456/100g soil) was observed in the soil from the 6 years citrus field located on Samyangdong, Jeju-si and the next one (385/100g soil) from the 18 years citrus field at the same place. The soils from Topyeongdong, Seogwipo-si (1)(2) were found to contain lower mycorrhizae spores than other sampling sites, 256/100g soil at seven years citrus field and 166/10g soil at twenty one years citrus field. 2. Colony radii and halo radii of bacteria measured 4mm - 11mm and 6mm-22mm, and colony radii and halo radii of fungi were 8mm-12mm and 14mm-18mm respectively when they were incubated in PDA-P media for one week. 3. The selected fungi, based on the radius size of colony and halo, dissolved 0.46mg-2.64mg P_(2)0_(3) from 200mg of powdered rock phosphate in the liquid media.

      • KCI등재후보

        정위상 및 탈위상 경사에코영상과 생체 수소 자기공명분광법을 이용한 담낭 담즙내 지질성분의 측정$^1$

        신석환,조순구,김영수,우제홍,김형진,서창해,Sin, Seok-Hwan,Jo, Sun-Gu,Kim, Yeong-Su,U, Je-Hong,Kim, Hyeong-Jin,Seo, Chang-Hae 대한영상의학회 2002 대한영상의학회지 Vol.46 No.2

        목적: 지질 억제 자기공명영상 기법과 수소 자기공명분광에서 측정한 지질 피크의 상대적 비율을 비교 분석하여,이 두 방법에 의한 담낭내 담즙 지질의 정량적 분석이 가능한 지를 알아보고자 하였다. 대상과 방법: 간기능 검사 및 콜레스테롤 수치가 정상이며, 초음파검사에서 담낭벽의 비후가 없고 담낭이 잘 팽창되어 있는 정상자원자 26명을 대상으로 하였다.담낭의 정위상 및 탈위상 경사에 코영상에서 담낭의 신호강도 차이를 계산하였으며, 담낭 자기공명분광 스펙트럼의 지질피크(0.8-1.6 ppm)와,2.0-2.4 ppm,3.2-3.4 ppm,3.9-4.1 ppm,5.2-5.4 ppm에서 관찰되는 피크의 넓이를 측정하였다. 전체 피크의 합에 대한 지질피크의 비율를 계산하였고, 신호강도 비율과 지질피크 비율를 비교하였다. 결과: 정위상 및 탈위상 자기공명영상에서의 신호강도비율은11.3-43.4%(평균 26 $\pm$8.9%)였고, 생체 수소 자기공명분광의 가장 현저한 피크는 지질피크(21명,92%)였으며, [ 피크0.8-1.6 ppm의 면적/모든 피크의 면적의 합] 은 0.10-0.97(평균 0.66 $\pm$0.21)였다. 신호강도 비율과 지질피크 비율의 상관성은 통계적으로 의미있는 상관성을 보였다(r=0.478,p=0.014). 결론: 지질 억제 자기공명영상 기법과 수소 자기공명분광법이 담낭내 담즙 지질성분을 측정하는 방법으로 이용될 가능성이 있다. Purpose: To evaluate the utility of signal intensity differences between in- and opposed-phase MRI and the lipid peak ratio in in-vivo proton MR spectroscopy of the gallbladder as diagnostic tools for measuring the lipidcontent of gallbladder bile. Materials and Methods: Twenty-six normal volunteers underwent MR imaging (FMPSPGR) and in-vivo proton MR spectroscopy of the gallbladder. In all cases the results of liver function tests were normal, as were cholesterol levels,and ultrasonography of the gaubladder revealed nothing unusual. For MRI and MRS a 1.5T unit (Signa Horizon; GE Medical Systems, Milwaukee, U.S.A.) was used. In-phase and opposed-phase coronal-section MR images(FMPSPGR; TR=125 msec, TE=1.8, 4.2 msec) of the gallbladder were obtained, and differences in signal intensity thus determined. For proton MR spectroscopy of the gallbladder, a localized proton STEAM sequence was employed. A single voxel of 1-8 cm3 was placed at the center of the gallbladder cavity, peak areas at 0.8-1.6 ppm (lipid), 2.0-2.4 ppm, 3.2-3.4 ppm, 3.9-4.1 ppm, and 5.2-5.4 ppm were measured by proton MRS and the relative peak area ratios of peak 0.8-1.6 ppm/other peaks were calculated. The degree of correlation between signal intensity differences at MRI and the relative peak area ratio of lipid in proton MRS was estimated using the p-value and Pearson's correlation coefficient. Results: Signal intensity differences ranged from 11.3 to 43.4% (mean,26$\pm$8.9%), and the range of lipid peak area ratio at MRS was 0.10-0.97 (mean, 0.66$\pm$0.21). There was significant correlation between the two measured values (P=0.014, Pearson’s correlation coefficient=0.478). Conclusion: In normal cystic bile, signal intensity differences at in- and opposed-phase MRI and relative lipid peak area ratios at MRS varied, though both methods could be used diagnostically for measuring the lipid contents of body tissue.

      • SCOPUSKCI등재
      • KCI등재

        저탄소강의 질화침탄과 산화처리시 분위기 변화에 따른 조직 및 부식특성에 관한 연구

        신평우 ( Sin Pyeong U ),이구현 ( Lee Gu Hyeon ),남기석 ( Nam Gi Seog ),박율민 ( Park Yul Min ),조형준 ( Jo Hyeong Jun ) 한국열처리공학회 2004 熱處理工學會誌 Vol.17 No.2

        N/A Nitrocarburizing was carried out with various CH, gas composition with 4 torr gas pressure at 570 C for 3 hours and post oxidation was carried out with 100% 0, gas atmosphere with 4 torr at different temperatures for various time. In the case of plasma nitrocarburizin, It is that the ratio of ε-Fe_(2·3)(N, C) and γ`-Fe,(C, N), which comprise the compound layer phase, depend on concentrations of N₂ gas and CH, such that when the concentration of N, and CH, increased, the ratio of γ`-Fe₄(C, N) decreased, but the ratio of ε-Fe_(2·3)(N, C) increased. The thickness of compound layer consistently increased as gas concentration increased regardless of N₂ and CH, expect when the concentration of CH, was 3.5 volume%, it decreased insignificantly. When oxidizing for 15min in the temperature range of 460-570℃, the study found small amount of Fe3O4 at the temperature of 460℃ and also found that amounts of Fe₂O₃ and Fe₃O₄ on the surface and amount of γ`-Fe₄(C, N) in the compound layer increased as the increased over 460℃, but the thickness of the compound layer decreased, Corrosion resistance was influenced by oxidation times and temperature.

      • 도공지 노화에 관한 연구(Ⅲ) : 도공지 노화방지를 위한 새로운 도공용 바인더 적용

        신우슬(U-Seul Sin),김선경(Sun-Kyung Kim),조병욱(Byoung-Uk Cho),이용규(Yong-Kyu Lee) 한국펄프·종이공학회 2011 한국펄프·종이공학회 학술발표논문집 Vol.2011 No.4

        This study was carried out in order to manufacture the high quality coated paper. High quality coated paper includes not only present state but also the state of the future. So in this study, acrylic-styrene emulsion which polymerized in laboratory was compared with SB(Styrene-butadiene) latex during thermal aging. The coated paper with three different formulations which controlled the dosage of acrylic-styrene emulsion were prepared. The coated paper were thermally aged at 105℃ for 18days and the optical properties were measured. Brightness, whiteness and CIE L value were higher during thermal aging with increasing amount of acrylic-styrene emulsion. CIE a* value was higher and CIE b* value decreased with increasing amount of acrylic-styrene emulsion. These results indicate that high quality coated paper which has anti-thermal aging property can be manufactured with acrylic-styrene emulsion.

      • KCI등재후보

        한국 민주시민교육의 체계와 제도화에 대한 고찰

        신두철(Sin, u-chel) 호남대학교 인문사회과학연구소 2009 인문사회과학연구 Vol.25 No.-

        본 논고는 한국에서 민주시민교육이 어떤 주체에 의해서 어떠한 전달체계를 통해서 이루어지고 있는지를 규명하고, 전달체계의 개선을 통해서 효과적인 민주시민교육 방안을 법적·제도적 차원에서 모색해 보았다. 민주시민교육은 시민의 관심과 능력을 정치적 관계에 맞추도록 유도하고, 그들의 정치적 지식과 통찰력을 확대시키고 판단 능력을 높이며 주어진 상황 하에서 정치적 참여를 촉진시키는 방향으로 이루어져야 한다. 전달체계의 분산으로 인한 문제점을 극복하기 다양한 주체가 한 자리에 모여 교육주체,내용 및 방법 등 향후 민주시민교육의 방향에 대한 ‘최소한의 합의’를 이룰 때 이다. 민주시민교육의 제도화는 궁극적으로 독일의 연방정치교육원과 같이 민주시민교육 프로그램을 운영하는 시민ㆍ사회단체에 대한 통합적인 재정지원 기능을 수행함으로써, 현재와 같이 지원체계의 분산으로 인한 투입과 산출의 비효율성도 개선하게 될 것이다. This paper examines the main agents for civic education and the system oftransmission through which civic education is disseminated in Korea. In addition, proposals that may be effective for the education of citizens through the improvement of the transmission system are explored at the legal and institutional levels. Civic education must encourage the interest and capability of citizens to align with political parties, expand their political knowledge and insight, raise their ability to judge, and promote political participation under given circumstances. The main agents should come together to reach a"minimal consensus" with regard to the future direction of civic education, including primary agents, contents, and methods that could beused to over comepotential problems resulting from thediversification of the transmission system. It is expected that the institutionalization of civic education will ultimately fulfill the function of integrated financial support for citizens and social organizations that will provide civic education programs, such as Germany's Bundeszentrale fur Politische Bildung(federal agency for civic education).

      • KCI등재
      • SCOPUSKCI등재

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