오원천의 식물플랑크톤 군집에 대한 연구

주현수,김진,박종천,정원석,송현철,이용탁,이우범 國立麗水大學校 環境問題硏究所 2004 環境硏究論文集 Vol.6 No.-

We carried out a study on phytoplankton community at Owon stream, Jeollabukdo, Korea. The author have examined 83 taxa of the phytoplankton from researched area. These were composed of 5 classes, 11 orders, 21 families, 44 genera, 79 species, and 9 varieties. The composition of occurrence species were as follows: green algae are 48.2%, diatoms are 33.7%, blue green algae are 10.8% and etc(7.3%). Dominant species were Chlamydomonas angulosa, Pandorina morum, Coelastrum microporum, Scenedesmus quadricauda, Staurastrum gracile, Melosira varians, Me. italica, Synedra ulna, Sy. acus, Cocconeis placentula, and Cymbella tumida. The standing crops varied from 1,650cells/ℓ to 47,000cells/ℓ. Phytoplankton density of Owon stream were lower about 8.6 times to a 1,531 times than those of other lakes and rivers in Korea. So, to preserve the water quality in Owon stream we have to manage continuously on the nitrogen and phosphorus.

저서동물을 이용한 진양호 유입하천의 수질평가

주현수,박종천,이원교 國立 麗水大學校 環境問題硏究所 1999 環境硏究論文集 Vol.2 No.-

This study was conducted to evaluate the biological water quality by aquatic benthos community analysis in the upper stream of Lake Jinyang of Kyungsangnamdo province. The total of benthic animal during surveyed period was indentified in all sites 31 species, 31 genera, 27 famillies 15 orders 7class in 4 phylums; In phylum platyhelmites 1 species, 1genus 1 family 1 order 3 class , in annelida 3 species 3 genera, 3 famillies 3 orders 2 class, in mollesca, 4 species, 4 genera, 3 famillies 3 orders 2 class, and in arthropoda 29 species, 24 genera, 20 famillies 8 orders 2 class were recorded. According to the analysis of biological indices of dominance index(DI), water quality of majority was either ? -mesosaprobic or polysaprobic but site 1 and 4 were polysaprobic at all seasons. In case of diversity index(H'). however, water quality in all sites were polysaprobic.

조류생산잠재력에 의한 진양호의 생물학적 수질평가

주현수,김진,박종천,정원석,이원교,이우범 國立 麗水大學校 環境問題硏究所 2000 環境硏究論文集 Vol.3 No.-

On filtrated and autoclaved water samples from Lake Jinyang, algal growth potential(AGP) test using Selenastrum capricornutum Printz were performed from February, 1999 to October, 1999 in order to assess fertility potential of the lake and to identify possible limiting nutrients. Algal growth potentials of the filtrated and filtrated after autoclaved samples were 0.018 ㎎/ℓ ~9.965 ㎎/ℓ and 0.018 ㎎/ℓ ~28.788㎎/ℓ respectively during surveyed period. AGP of the filtrated after autoclaved were higher than those of the filtrated only except some specific stations. The points of maximum growth were measured after addition of N, P and unenriched samples (control). The limiting factor was nitrogen only at site 5 in spring and phosphate appeared to be the major limiting nutrients in spike test throughout the year, especially during spring and autumn. Accoding to trophic level by Sudo(1980), the water quality of lake Jinyang were estimated mesotrophic at site 2, 4, 5, 6 in spring, at site 3, 6 in summer and at site 6 in autumn but all other sites were oligotrophic. But it is suggested that if we have not manigement of lake Jinyang, the water quality is possible to convert eutrophic.

Chitosan 가수분해물의 in vitro 항돌연변이 활성

장현주,전향숙,이서래 이화여자대학교 생명과학연구소 1996 생명과학연구논문집 Vol.7 No.-

Chitosan이 항돌연변이 활성을 나타내는 분자량범위를 알아보기 위해, Chitosan 가수분해물의 3-amino-1-methyl-5H-pyrido[4,3-b]indole(Trp-P-2), aflatoxin B_1, 2-nitrofluorene 및 4-nitroquinoline oxide에 대한 억제활성을 Salmonella typhimurium reversion assay와 SOS chromotest로 조사하였다. Chitosan을 산가수분해한 후 한외여과하여 6가지 fraction들(분자량 1,000 이하, 1,000∼3,000, 3000∼10,000, 10,000∼30,000, 30,000∼100,000, 1000,000 이상)의 chitosan 가수분해물을 제조하였다. 제조된 각 fraction의 탈아세틸화도는 큰 차이가 없었으며, 시료 자체의 pH가 복귀 돌연변이수와 SOS 유도 반응에 미치는 영향은 없는 것으로 나타났다. 얻어진 fraction별로 Salmonella typhimurium reversion assayf를 실시한 결과, Trp-P-2에 대한 항돌연변이 활성은 fraction의 6의 5% 농도에서 78%, aflatoxin B_1에 대해서는 fraction 5의 10% 농도에서 92%, 그리고 2-nitrofluorene에 대해서는 fraction 6의 5% 농도에서 51%의 최고 활성을 나타냈다. 한편 SOS chromotest에서는 Trp-P-2에 대하여 0∼54%, 4-nitroquinoline oxide에 대하여 0∼77%의 억제 활성을 나타냈다. Antimutagenic effect of chitosan hydrolysates was investigated using Salmonella typhimurium reversion assay and SOS chromotest against 3-amino-1-methyl-5H-pyrido [4,3-b]indole(Trp-P-2), aflatoxin B_1, 2-nitrofluorene and 4-nitroquinoline oxide. After partial acid hydrolysis of chitosan, six fractions of different molecular size were obtained by ultrafiltration. Chitosan hydrolysates showed antimutagenic effect of 0∼78% on Trp-P-2, 0∼92% on aflatoxin B_1 and 0∼51% on 2-nitrofluorene in Salmonella tryphimurium reversion assay. Inhibitory effect in Salmonella typhimurium reversion assay showed the highest at 5% concentration of fraction 6 on Trp-P-2, 10% concentration of fraction 5 on afaltoxin B_1 and 5% concentration of fraction 6 on 2-nitrofluorene. In SOS chromotest, chitosan hydrolysates showed anitimutagenic effect of 0∼54% on Trp-P-2 and 0∼77% on 4-nitroquinoline oxide. These results suggest that high molecular weight fraction of chitosan hydrolysates(MW>30,000)is most effective to inhibit mutagenicity of tested mutagens.

다구찌 실험계획법을 이용한 드라이 선삭가공의 최적 가공조건 선정

송춘삼,김준현,김주현 한국공작기계학회 2003 한국공작기계학회 추계학술대회논문집 Vol.2003 No.-

Recently, various efforts to make more speedy and precision machine tool to improve productivity and also various efforts to solve environmental problem are going on, so that dry cutting in manufacturing industry, which needs environmental conscious design and development of manufacturing technique, is becoming a very important assignment to solve. Because dry cutting does not use cutting fluid, we need other methods that can be used instead of cutting fluid, which does cooling, lubricating, chip washing, and anti-corrosion. Especially, because turning is a continuous work, the consideration of tool life and surface roughness due to continuous heat and poor lubrication is important. The purposes of this paper are the consideration of how well the compressed air can work instead of cutting fluid, and also the development of the method to select the optimum machining condition by the minimum numbers of experiments through the Taguchi method.

강진만 미생물군집의 계절별 분포

박종천,주현수,이우범 國立 麗水大學校 環境問題硏究所 1999 環境硏究論文集 Vol.2 No.-

The biological and ecological surveys were carried out at six site water region from February to October. 1998, In other to analysis of environmental variation, density population of heterotrophic bacteria, general fulgi and fecal coli were determined on each sample. The result, ecosystem of Gangjin bay were regulated by 2~4 factors for four season. The results showed that distribution of the microbial population was mainly infuluenced by inflow of fresh water, salinity and variation of water temperature. And suggested that environmental factor of Gangjin bay was relatively simple than those other bays.

급성하벽심근경색에서 전흉부유도 ST절 하강의 의의

정병천,배호상,곽동훈,김영태,배용학,황종현,임현주,류재근,조용근,채성철,전재은,박의현 慶北大學校 醫科大學 1997 慶北醫大誌 Vol.38 No.2

목적 : 급성하벽심근경색증 환자에서 심전도상 흔히 동반되는 전흉부유도 ST절 하강의 의의를 알아보았다. 방법 : 심근경색후 24시간에서 48시간에 얻은 심전도를 기준으로 52명의 급성하벽심근경색증 환자를 전흉부유도에서 ST절의 하강이 있는 군과 없는 군으로 나누었으며 심도자, 관상동맥조영술, 심초음파도 및 방사성 핵종을 이용한 좌심구혈율 측정 등을 시행하였다. 결과 : 1) 좌심실확장기말압은 전흉부유도에서 ST절의 하강이 있는 경우에서 16.9±5.33mmHg로 없는 경우의 11.0±4.02mmHg보다 유의하게 높았다(p<0.05). 그러나 운동량 및 좌심구혈을은 흥부 유도상 ST절의 하강이 있는 경우 7.6±3.0 METs 및 53.9±9.1%로 없는 경우의 9.1±2.7 METs 및 54.6±9.5%보다 낮았으나 통계적 유의성은 없었다(p=0.180, p=0.823). 2) 관상동맥조영술상 전흉부 ST절의 하강이 동반된 군에서는 유의한 좌전하행지나 좌회선지의 협착이 있는 경우가 60.9% 및 57.9%로 ST절의 하강이 없는 군에서의 34.5% 및 7.7%와 비교해 좌관상동맥에 협착이 동반된 경우가 많았다(p=0.050, p=0.001). 3) 관상동맥조영술상 세 혈관질환의 빈도는 흉부유도상 ST절의 하강을 보인 23예에서 10예로 ST절 하강이 없었던 29예중 2예에 비하여 유의하게 많았고(P=0.007), 단 혈관질환의 빈도는 ST절의 하강을 보인 군에서 23예중 5예로 ST절 하강이 없었던 29예중 17예에 비하여 유의하게 적었다(P=0.002). 두 혈관질환의 경우에는 각각 8예와 10예로 양군간에 유의한 차이가 없었다. 4) 흉부유도상 ST절 하강의 빈도는 단 혈관질환 22예 중 5예에서, 두 혈관질환 18예중 8예, 세 혈관질환 12예 중 10예에서 관찰되어 협착이 있는 관상동맥의 수가 많을수록 ST절의 하강이 나타나는 빈도가 많음을 보였다(p=0.00308). 그러나 흉부유도상 나타난 ST절의 하강을 모두 합하여 구한 ST절 하강의 합은 협착이 있는 관상동맥의 수와 통계적인 유의성이 없었다. 5) 심초음파도상 좌심실 하벽의 벽운동은 ST절 하강을 보인 군에서는 akinesia가 83.3%, hypokinesia가 11.1%, 정상 벽운동이 5.6%로, ST절 하강이 없었던 군에서의 dyskinesia가 3.6%, akinesia가 39.3%, hypokinesia가 25.0%, 정상 벽운동이 32.1%와 비교하여 ST절의 하강이 있는 군에서 유의하게 벽운동의 장애가 빈번함을 보였다(p=0.03891). 그러나 좌심실전벽, 측벽 및 중격부위에서는 유의한 벽운동의 차이가 없었다. 결론 : 급성하벽심근경색증 환자의 전흉부유도에서 ST절의 하강이 동반되는 경우 다혈관 질환의 가능성이 높으며 좌심실확장기말압이 상승되었고 운동능력은 감소되어 있었다. 또한 심초음파도상 좌심실하벽의 벽운동장애도 심하였다. 따라서 전흉부 ST절의 하강을 동반한 급성하벽심근경색증 환자는 전흉부유도에 ST절 하강이 없는 경우보다 예후가 불량할 것으로 생각되며, 보다 적극적인 치료가 필요할 것으로 생각된다. The purpose of this study was to determine the significance of precordial ST segment depression appearing during acute inferior myocardial infarction and to assess the correlation of that with angiographic finding. 52 patients were allocated into two groups based on the existence of precordial ST segment depression : 23 patients with ST segment depression and 29 patients without ST segment depression. The extent of coronary artery disease as well as the prevalence of significant stenosis (≥70%) in left anterior descending artery were more frequent in patients showing precordial ST segment depression than in patients not showing them (p=0.050) and the result were similar in cases of left circumplex artery (p=0.001). On echocrdiographic examination of left ventricular (LV) wall motion, it showed more severely decreased inferior LV wall motion in patients showing precordial ST segment depression than in patients not showing them (p=0.03891) even though the other segment of LV wall motion didn't show the statistical difference between both groups. The other cardiac parameters such as LVEDP, exercise amount (METs) and ejection fraction were tend to showing bad profile in patients with precordial ST segment depression. From the above results, we could deduce that patients with precordial ST segment depression have relatively large infarction or concomitant left coronary artery disease, so they need more caution and intensive theraphy.

기능상실한 이식신의 절제

조원현,남창우,김천일,주일,박성배,김현철 大韓移植學會 1994 Korean Journal of Transplantation Vol.8 No.1

수술실 오염도감소를 위한 수술실공조시스템에 대한 연구

김천숙,박은정,강규식,김지은,안기량,권진형,유시현,주영철,권순정 순천향의학연구소 2004 Journal of Soonchunhyang Medical Science Vol.10 No.1

Background: The OR(operating room) should provide an optimum environment that is safe for the patient and the working personnel. The air ventilation system of OR has been studied to decrease the contamination of air. We investigated the flow and contamination of the air in OR at our hospital. Method: Cultures in OR were made and the number of bacteria and fungi were calculated. A two-dimensional model for the cross-section of an operation room is developed for the CFD (computational fluid dynamics) analysis. The characteristics of air flow in the empty operation room and in the occupied operation room are calculated by using a CFD program. Results: The current air ventilation system of our hospital does not deliver the clean air to the operating site efficiently in occupied OR. Conclusions: We suggested a new location of air ventilation system which improves air venting with little increase of the cost of equipment.

GC와 GC-MS에 의한 어란의 지방산 분석

이주현,전명숙,이명환 서울여자대학교 자연과학연구소 1995 자연과학연구논문집 Vol.6 No.-

9종류의 어란에서 지방산을 추출하여 GC-MS로 분석한 결과 다음과 같은 결과를 얻었다. 1. 어란중 지방산을 GC와 GC-MS로 분석할 때 초기온도를 60°C로 하고 승온률을 9°C/min, 마지막 온도를 220°C로 하는 승온법이 목적 성분을 분리하는데 가장 좋은 결과를 얻었다. 2. 가자미, 날치, 대구, 명란, 농어, 성어, 오징어, 참치, 청어의 알에서 지방산을 추출하여 GC로 분석한 결과 포화 지방산은 myristic acid, palmitic acid, stearic acid, arachidic acid가 검출 되었고, 불포화 지방산은 oleic acid, linolenic acid 가 각각 확인 되었다. 3. 포화 지방산은 myristic acid가 명태알에 11.8㎍/g 으로 가장 많이 함유되어 있었고, palmitic acid는 오징어알에서 106.32㎍/g으로 가장 많이 함유되어 있었다. Stearic acid는 농어알에 53.03㎍/g, arachidic acid는 대구알에 8.5㎍/g으로 가장 많은 양이 함유되어 있었다. 4. 불포화 지방산인 oleic acid와 linolenic acid의 함량을 분석한 결과 oleic acid는 가자미 알에 linolenic acid는 명태알에 각각 109.12㎍/g, 62.48㎍/g으로 가장 많은 양이 함유되어 있었다. Fatty acids were extracted from the roe of flounder, flying fish, Pacific cod, Alaska Pollack, mero, shark, squid, tuna, and herring. They were methylated and analyzed by GC and GC-MS. Most of fatty acids found from 9 different roe were myristic acid, palmitic acid, stearic acid, arachidic acid, oleic acid, and linolenic acid. The roe of Alaska Pollack, squid, mero, and Pacific cod contained 11.8ug/g, 62.48 ug/g, of unsaturated fatty acids such as oleic acid and linolenic acid, respectively. The roe of flounder and shark had higher content unsaturated fatty acids than rest of the roe. The roe of Pacific cod, Alaska Pollack, mero, squid, tuna, and herring had larger amount of saturated fatty acids than the rest of the roe.