수술실 손 소독제의 종류에 따른 균주 수의 변화

홍성윤,김정민,김소영,이수정,오은실,양서인,김화실,김남초 병원간호사회 2006 임상간호연구 Vol.11 No.2

Purpose: The present study purposed to compare the hand washing effect of 7.5% powidone-iodine, which is used in the operation room of C university hospital in Seoul, with that of Ethyl alcohol-CHG mixture recommended by the US Association of Operating Room Nurses (2002) and to adopt a more effective hand disinfectant. Method: In a quasi-experimental design, 48 medical staff who participated in operations during the period from November 2004 to February 2005 had hand washing using the two kinds of hand disinfectants: 7.5% povidone-iodine and the ethyl alcohol-CHG mixture. Their palms were swabbed and cultured just after hand washing and again after taking dff sterile gloves after the operation. The number of colonies from the two occasions were counted and compared. Result: The number of general bacillus increased significantly in the group using 7.5% povidone-iodine compared to that in the group using the ethyl alcohol-CHG mixture. The number of general bacillus increased signficantly in doctors compared to that in nurses. The factors affecting the increase of the number of general bacillus were disinfectants and medical personnel. The number of general bacillus was expected to increase 9.41 times with 7.5% povidone-iodine than with the ethyl alcohol-CHG mixture and 14.87 times in doctors than in nurses. Conclusion: This study shows that the ethyl alcogol-CHG mixture has a stronger hand disinfection effect than 7.5% povidone iodine. Thus we need to change the hand disinfectant used in operating rooms as soon as possible in order to minimize the infection of wounds resulting from operations.

동해로 유입되는 가곡천과 마읍천에 서식하는 담수어의 지리적 분포

남명모,강영훈,채병수,양홍준 한국어류학회 2002 韓國魚類學會誌 Vol.14 No.4

1999년 4월부터 2000년 10월까지 강원도 삼척시에 위치한 가곡천과 마읍천에서 어류의 지리적분포와 군집구조를 조사하였다. 가곡천에서는 10과 20종, 마읍천에서는 10과 25종의 어류가 확인되었으며, 이 가운데 한국 고유종은 Squalidus multimaculatus, Iksookimia koreensis 그리고 Liobagrus mediadiposalis의 3종이었다. 가곡천의 미기록종은 S. multimaculatus, I. koreensis, Pungitius sinensis sinensis 그리고 Oncorhynchus masou masou이었으며, Zacco platypus와 Z. temmincki가 우점종이었다. 가곡천 상류역에서는 Z. temmincki와 Moroco oxycephalus가 우점종이었으며, 중류역에서는 Z. platypus, 하류역에서는 Cottus Hngiongensis, Chaenogobius urotaenia 그리고 Rhinogobius brunneus가 우점종이었다. 마읍천의 미기록종은 Cyprinus carpio, Pseudorasbora parva, Silurus asotus, O. m. masou, M. oxycephalus, Gasterosteus aculeatus, P. s. sinensis, C. castaneus, Acanthogobius lactipes, Tridentiger brevispines이었으며, Z. platypus가 우점종이었다. 마읍천 상류역에서는 Z. platypus가 우점종이었으며, 중류역에서는 Ladislavia taczanowskii, 하류역에서는 P. s. sinensis가 우점종이었다. 본 조사에서 확인된 어류 가운데, 특히 가곡천에 서식하는 S. multimaculatus와 마곡천에 서식하는 L. taczanowskii와 Nemacheilus toni는 지리분포상 보호되어야하겠다. 가곡천의 종다양성지수는 1.109, 마읍천의 종다양성지수는 1.109로서 종다양성이 높고 군집이 안정되어 있었다. The geographical distribution and community structure of freshwater fishes in the Gagog and Maeup Streams, which flow into the East Sea, were surveyed from April 1999 to October 2000. Twenty species belonging to 10 families were collected in Gagog Stream. Twenty-five species belonging to 10 families were collected in Maeup Stream, including the Korean endemic species Squalidus multimaculatus, Iksookimia koreensis and Liobagrus mediadiposalis. In the Gagog Stream, S. multimaculatus, I. koreensis, Pungitius sinensis sinensis and Oncorhynchus masou masou were newly recorded. The dominant species were Zacco platypus and Z. temmincki. A tendency was seen in regional distribution such that Z. temmincki and Moroco oxycephalus dominated in the upper stream, Z. platypus in the middle stream, and Cottus hangiongensis, Chaenogobius urotaenia and Rhinogobius brunneus in the lower stream. Newly recorded from the Maeup Stream are Cyprinus carpio, Pseudorasbora parva, Silurus asotus, O.m.masou, M. oxycephalus, Gasterosteus aculeatus, P. s. sinensis, C. castaneus, Acanthogobius lactipes and Tridentiger brevispinis. The dominant species was Z. platypus. A tendency was seen in regional distribution such that Z. platypus dominated in the upper stream, Ladislavia taczanowskii in the midddle stream, and P. s. sinensis in the lower stream. Among the noteworthy fishes found in the present study were S. multimaculatus in the Gagog Stream and L. taczanowskii and Nemacheilus toni in the Maeup Stream, These species are considered as species of conservation concern. The species diversity index of the communities were 1.109 in the Gagog Stream and 1.166 in the Maeup Stream. The results indicate that the community structure in each stream is very diverse but stable in its species composition.

랫드에서 법제유황과 비법제유황의 독성비교

김근수, 정유리, 이남진, 홍성희, 유종훈, 정재황, 강종구 충북대학교 동물의학연구소 2006 Journal of Biomedical and Translational Research Vol.7 No.2

본문참고

비산회재로부터 합성된 제올라이트를 이용한 Polypropylene 촉매열분해에 관한 연구

남윤미,이진홍,김성수,정수현 한국공업화학회 2003 응용화학 Vol.7 No.1

Zeolites were synthesized from fly ash and used as catalysts for pyrolysis of polypropylene(PP) Zeolite synthesis was carried out by fusion methods employing three different NaOH/Fly ash rations in weight The catalytic performance of the fly ash-derived zeolite pyrolysis products. The properties of the fly ash-derived zeolites were characterized by XRD, SEM, BET, NH_3-TPD. It was found that the optimum NaOH/fly ash weight ratio was 1.2 in terms of the simulated boiling point distribution. The catalytic perfomance of the fly ash-derived zeolite was significantly improved by ion exchanging of zeolite from Na from(FAZ) to H from(HFAZ) The boiling point distributions of liquid pyrolysis products obtained over HFAZ were significantly lower than that obtained zeolite.

FTTH를 위한 협대역 스펙트럼 필터의 설계

홍성수,조미남,김사웅,박수봉 東新大學校 2003 論文集 Vol.13 No.-

In this paper, harmonic expansion method(HEM) for analyze optical components which are necessary before the fabrication of optical circuit component and as its applications, using narrow-band spectral filter are studied. Also a narrow-band spectral filter constructed with a W-index optical waveguide is proposed and analyzed. The proposed filter offers a spectral width on the order of one nanometer, considerably narrower than that provided by a filter made of two step-index optical waveguides having the same transmission wavelength. The narrow spectral width is achieved by exploiting a relatively large slope difference between the dispersion characteristics of the W-index and step-index waveguides constituting the filter. The transmission characteristic of the proposed filter with peak transmission at 1550nm is calculated and compared with that of a corresponding filter made of two step-index waveguide filters.

정신지체 학생의 구강실태 및 우식활성도에 관한 연구

한수경,김남순,조홍규,송호준,최충호,최남기 대한소아치과학회 2007 大韓小兒齒科學會誌 Vol.34 No.1

본 연구의 목적은 정신지체 학생의 구강건강 실태 및 치아우식 활성도를 평가하여, 학생들의 구강건강 증진을 위해 필요한 교육 방안을 모색하고, 실제적인 구강건강 관리 향상을 위한 기초 자료를 마련하고자 하는 것이었다. 광주광역시 소재 S 정신지체특수학교 유아부부터 고등부까지의 학생을 대상으로 조사를 실시하였다. 구강건강실태를 평가하기 위한 구강검사는 213명에 대해 시행하였으며, 치아우식활성도 검사는 197명에 대해 시행하였다. 치아우식활성도 평가를 시행한 197명의 정신지체 학생 중 우식활성이 고도인 학생은 33명(16.77%)으로 나타났으며, 13세 이하가 그 이상의 연령에 비해 치아우식활성도가 높았다. 치아우식활성도의 경중도와 치은염 유무와는 관련성이 없는 것으로 나타났다. 정신지체 장애학생의 치아우식활성도 경중과 치아우식경험지수와의 상관성을 평가한 결과, 치아우식활성도가 증가할수록 우식경험치율과 우식경험치지수가 높은 양상을 보였으며, 특히 유치의 경우 우식경험유치율 및 우식경험유치지수는 치아우식활성도와 높은 상관성을 보였다. The purpose of this study is to evaluate oral health status, caries-inducing bacterial activity of the mental retardation students, and developing motivation method for improving oral hygiene management by clarifying the relationship between caries- inducing bacterial activity and oral health status of mental retardation students. Caries experience indices, caries susceptibility test, gingival health evaluation, and oral hygiene management and oral health survey were performed. Results were as follows: 1. The DMFT index of disabled students(12 years) was 2.07. 2. The gingival inflammation was occurred more frequently in older ages. 3. There also was a high positive correlation between caries incidences and the results of caries-inducing bacterial activity test especially in deciduous teeth. This result suggested that the Dentocult SM mutans test as a caries activity test is a reliable method for measuring the status of dental caries in mental retardation students. Because it would motivate the mental retardation students to care more actively for their oral hygiene if they learn how much dental caries-inducing bacteria are living in their mouth by observing the bacterial colony on the cultured test strip, it can become a possibly efficient educational tool for the mental retardation students.

Doublet Panel Method를 이용한 Hovering Rotor의 공기역학적 해석

朴洪男,柳能秀 江原大學校 産業技術硏究所 1988 産業技術硏究 Vol.8 No.-

To predict the airloads on helicopter rotors in hover, the doublet panel mehtod of the first order is applied. For this simulation, the rotor blade is divided into many panels both in spanwise and in chordwise direction, and Kocurek-Tangler's prescribed wake with roll-up process is taken for determing wake geometry and then represented by vortex lattice. To abtain more physically realistic calculation of induced velocity, the vortex core model is adopted and the compressibility effect is considered by Karman-Tsien rule.

고소성 해성점토지반의 압축지수에 대한 비교 연구

정길수,박병수,홍영길,유남재 江原大學校 産業技術硏究所 2005 産業技術硏究 Vol.25 No.A

In this paper, for the highly plastic marine soft clay distributed in west and southern coast of Korean peninsula of Kwangyang and Busan New Port areas, correlation between compression index and other indices representing geotechnical engineering properties such as liquid limit, void ratio and natural water content were analyzed. Appropriate empirical equations of being able to estimate the compressibility of clays in the specific areas were proposed and compared with other existing empirical ones. For analyses of the data and test results, data for marine clays were used from areas of the South Container Port of the Busan New Port, East Breakwater, Passenger Quay, Jungma Reclamation and Reclamation Containment in the 3rd stage in Kwangyang. In order to find the best regression model by using the commercially available software, MS EXCEL 2000, results obtained from the simple linear regression analysis, using the values of liquid limit, initial void ratio and natural water content as independent variables, were compared with the existing empirical equations. Multiple linear regression was also performed to find the best fit regression curves for compression index and other soil properties by combining those independent variables. On the other hands, another software of SPSS for non-linear regression was used to analyze the correlations between compression index and other soil properties.

쇄석의 진동다짐 특성에 관한 실험적 고찰

정길수,박병수,홍영길,유남재 江原大學校 産業技術硏究所 2004 産業技術硏究 Vol.24 No.B

This Study is results of experimental works to investigate the characteristics of vibro-compaction of crushed stones having coarse grain sizes. For testing material, crushed stone, sieved within very narrow ranges of grain size distribution, was used. Cyclic loading apparatus was used to apply cyclic loading to the specimen prepared in the mold. Tests were performed by changing the ratio of the maximum to the minimum stress, frequency and the magnitude of the maximum and the minimum stresses. Settlement of specimen due to cyclic loading was measured to analyze the compaction efficiency and sieve analysis test after cyclic loading test was also carried out to find the crushing rate of the specimen. As results of cyclic loading test, normalized settlement in terms of specimen height tends to be converged around loading cycle number of 1500. The magnitude of normalized settlement is in the range of 3.11 ~ 8.57%. The crushing rate is in the range of 4.46 ~ 8.78%. Normalize settlement and the crushing rate tend to increase with decreasing the ratio of the maximum to the minimum stresses and they tend to increase with increasing the frequency and the magnitude of the maximum and the minimum stresses for the given ratio. In conclusions, compaction rate of crushed stone is controlled by the dynamic stress (difference between the maximum and the minimum stresses) and the crushing rate is dominated by applied energy to the specimen.

酸性降雨에 의한 畓土讓內 金屬物質의 浸出 및 吸着能에 關한 硏究(Ⅰ)

김남천,우세홍,채수권,권우택,유영식 서울保健大學 1992 論文集 Vol.12 No.1

Leaching characteristics and adsorption ability of Fe and Mn in the paddy soil were studied with synthetic acid rain. 1. Leaching quantity of Fe from the paddy soil by acid rain was 8 times as much as by neutral rain, and 6 times for Mn. 2. Leaching quantity was changed with heat treatment methods of sample soil (ignition or air drying), with kind of meta](Fe or Mn) and with acidity of soil (acid or netural). 3. The adsorption ability of Fe on the paddy soil was twice as much as, that of Mn. 4. Langmuir isotherm equation was c/q=20C+10 for Fe(air drying paddy soil) and c/q=160 C - 610 for Mn(ignation paddy soil). 5. Contineous column experiment showed that the adsorption ability of Mn was above 100, and for Fe, it was changed with kinds of sample soil and pouring methods.