한국재래흑염소에서 발정 및 과배란 유도와 외래유전자 주입에 적합한 1세포기 수정란의 채취

신상태,이두환,김명철,이운규,이철상,한용만,이경광 충남대학교 수의과대학 동물의과학연구소 1998 動物醫科學硏究誌 Vol.6 No.-

Three different treatments for induction of estrus in Korean native black goats were compared: follicle stimulating hormone(FSH, FSH-p^TM), FSH combined with MAP(intravaginal impregnated sponges, Veramix^ⓡ, containing 60 ㎎ medroxy progesterone acetate for 14 days), and FSH combined with progesterone(Ovaron^ⓡ, 10 ㎎ IM for 10 days) and PGF_2α(Lutalyse^ⓡ, 3 ㎎ IM at first FSH injection). FSH for inducing estrus and superovulation was given a total 20 ㎎ intramuscularilly in decreasing dosage injections twice daily over 4 days. The MAPs were withdrawn at the 3rd day of FSH injection. Estrus observations were conducted every 6 hours from last FSH injection for 24 hours by placing the does with fertile male goats. Estrus and superovulation were more successfully induced with treatment of MAP + FSH than other treatments(FSH only, or progesterone + PGF_2α + FSH) (estrus induction; 100 vs 42.8 and 71.4%, ovulation points; 11.4 vs 5.4 and 4.4, respectively). The effect of gonadotropin releasing hormone(GnRH) on the ovulation rate was also examined. However, no difference was observed for inducing ovulation with treatment or dosage(100 ㎍ 200 ㎍) of GnRH. Low midline laparotomies were performed, and then ovarian responses (ovulations and follicular development) were examined by exteriorization of the reproductive tracts. Ova were recovered from oviducts by retrograde flushing 60-146 hours after MAP removal, and were classified the developmental stages. Overall 66.1% (236/357) of recovery rate was obtained from 30 superovulated does. The optimal recovery time of microinjectable 1-cell zygotes was approximately 72-76 hours after MAP removal.

중소규모 사업장 근로자의 직무스트레스로 인한 결근, 조퇴 현황과 한국형직무스트레스 하부요인과의 관련성

김정훈,박신구,김동현,김환철,임종한,이의철,이동훈,이지영 大韓産業醫學會 2009 대한직업환경의학회지 Vol.21 No.2

목적: 중소규모 사업장 근로자들의 직무 스트레스로 인한 결근, 조퇴의 현황과 한국형 직무 스트레스 하부 요인과의 관련성을 알아보고자 하였다. 방법: 중소규모 사업장 83곳 근로자들에 대해 한국형 직무스트레스요인 평가도구-단축형(KOSS-SF)과 사회 일반적 특성, 직업적 특정 및 직무스트레스로 인한 결근이나 조퇴 경험여부 등을 묻는 구조화된 자가 기입식 설문을 실시하였고, 응답한 4,350명에 대해 최종 분석을 시행하였다. 직무스트레스로 인한 결근, 조퇴와 한국형 직무스트레스 하부 요인들과의 관련성을 확인하기 위하여 로지스틱 회귀분석을 시행 하였다. 결과: 직무 스트레스로 인한 결근, 조퇴를 한 근로자는 남자에서 7%(196명), 여자에서 8%(113명) 로 조사되었고 한국형 직무 스트레스 하부요인과의 관련성에서는 남, 여 모두 직무요구, 관계갈등, 조직체계, 보상부적절, 직장문화 영역의 스트레스가 높은 군에서 통계적으로 의미있게 직무스트레스로 인한 결근, 조퇴율이 증가하였다. 결론: 중소규모 사업장 근로자들의 직무 스트레스로 인한 결근, 조퇴와 한국형 직무 스트레스 하부요인과의 관련성은 남자에서는 조직체계 영역이 가장 높았고, 여자는 직장문화 영역에서 가장 높은 관련성을 보였다. Objective: The aim of this study was to examine the actual conditions of absence and early leave due to job stress of 4,350 workers in 83 small and medium scale industries, and its relationship to job stress factors using Korean Occupational Stress Scale-Short Form (KOSS-SF). Methods: A structured self-reported questionnaire was used to assess each respondent's Sociodemographics, job stress, experience of absence and early leave due to job stress. Seven KOSS-SF domains of job stress were used. We estimated the relation of absence and early leave due to job stress and job stress factors using logistic regression analyses. Results: Absence or early leave due to job stress occurred in 7% of male workers and 8% of female workers. Multiple regression analysis revealed a significantly positive association job stress-related absence/early leave and job demand, interpersonal conflict, organizational system, lack of rewards and occupational climate. Conclusions: Absence and early leave due to job stress is significantly attributed to organizational System and lack of reward for men, and occupational climate and organizational system for women.

부산·울산·경남지역 직업병 감시체계

김정일,김병권,김정원,채창호,이철호,강동묵,김지홍,김진하,김영욱,이영하,이지호,김정호,윤형렬,유철인,정백근,장태원,김운규,윤동영,강진욱,김종은,안진홍,이동준,장준호,이광영,송혜란,최영희,이용환,조병만,최홍렬,고상백,김은아,이유진,홍영습,정갑열,김정만,김준연 大韓産業醫學會 2004 대한직업환경의학회지 Vol.16 No.1

Objective: Occupational medicine specialists in the Busan, Ulsan and Kyung-Nam areas established an area-based occupational disease surveillance system and used this system to collected case information for the purpose of preventing occupational diseases Methods: l l hospital participated in this system. The authors selected five main diseases, which were hand-arm vibration syndrome (HAVS), work-related musculoskeletal disorder (WRMSD), occupational asthma, occupational skin disease and occupational and occupational lung cancer and established their case definitions. All cases were reported on the web, and real time analysis was conducted. Results: Between April 2001 and April 2003, 192 cases of HAVS, 118 cases of WRMSD, 33 cases of occupational asthma, 17 cases of occupational skin disease and 17 cases of occupational lung cancer (for a total of 377 cases of these five main diseases) were reported. most of the HAVS cases came from shipbuilding, and 172 of them (92.7%) were associated with grinding. Of the four main types of WRMSD, carpal tunnel syndrome (CTS) was the most prevalent with 46 cases and shipbuilding was also the main industry involved (83.9%). The ergonomic risk factors involved mainly associated with the hand. In 19 (57.6%) and 4 (12.1%) cases of occupational asthma, the agents involved. The causative agents of occupational lung cancer included Cr, welding fume, PAH, Ni, etc. 10(58.8%) of the cases were diagnosed as squamous cell carcinoma and 5(29.4%) as adenoma. Conclusion: This result showed that an area-based occupational disease surveillance system might provide an effective method of evaluating the prevalence of such diseases, however the Busan, Ulsan and Kyung-Nam provinces are too large to be treated as individual areas. Therefore, the authors suggest that each province should establish its own surveillance system.

사무직 근로자에서 직무스트레스 및 VDT작업과 목·어깨 근골격계 증상과의 관련성

이의철,김환철,정달영,김동현,임종한,박신구 대한산업의학회 2007 대한직업환경의학회지 Vol.19 No.3

진양호 습지의 식생구조와 환경요인

이정아,김철수,이정환,오경환 경상대학교 환경보전연구소 1998 環境保全硏究所報 Vol.6 No.1

The flora, vegetation structure and distribution of the vascular hydrophytes and hygrophytes, physico-chemical properties of sediment, and correlations with the environmental factors were investigated in the nine wetlands of the Chinyang-Lake, Chinju-city, Kyoˇngsangnam-do, Korea from June to November in 1996 to predict the changes of wetland ecosystem and to furnish the basic data for the counterplan to set up a measure for the conservation of the wetland due to the reinforcement of Namgang-Dam. 1. The flora of the study area was composed of 70 families, 176 genera, 245 species, 1 subspecies, 35 varieties and 2 form or total 283 kinds of the vascular hydrophytes and hygorphytes. The life forms of the vascular hydrophytes were classified as 23 kinds of emergent plants, 4 kinds of floating-leaved plants, 3 kinds of free-floating plants, and 8 kinds of submersed plants, respectively. 2. The importance values of Persicaria hydropiper was 5.94 and those of Polypogon fugax, Bidens frondosa, Salix glandulosa, Miscanthus sacchariflorus, Aneilema keisak and Eleocharis mamillata var. cyclocarpa were 5.47, 5.13, 4.93, 4.80, 4.35, and 4.18, respectively. The dominant species of sandbar, littorial zone and old field were Miscanthus sacchariflorus, Persicaria thunbergii, Echinochloa crus-galli var. frumentacea, respectively, and their importance values were 10.11, 8.48, and 16.34, respectively. 3. The ranges of species diversity indices (H') were 1.412∼1.930. It was highest in site I which was old field. The ranges of eqitability were 0.736∼0.934, and highest in the C site, which was the sandbar, and the ranges of community similarity indices (CC_s) were 0.293∼0.658 among the nine wetlands, and highest between B site and C site, which were sandbar. 4. The ranges of sediment properties such as pH, conductivity, organic matter, available phosphorus, and total nitrogen were 5.15∼6.33, 11.80∼42.83 ㎛ho㎝^-1, 1.59∼6.37%, 0.07∼0.17 ㎎/100g, and 0.03∼0.14%, respectively, Among these factors, conductivity and total nitrogen were highest in the sandbar as 23.85∼42.83 ㎛ho㎝^-1 and 0.03∼0.14%, organic matter was highest in the littoral zone as 3.23∼6.37%, and pH was highest in the disturbed area as 6.03∼6.33, respectively. 5. Percentage of the particle size for clay, silt, and sand were 2.00∼15.00%, 16.07∼59.33%, and 28.67∼78.33%, respectively. Content of sand and silt were same in the sandbar and littoral zone, but sand was high and silt was low in the disturbed area. 6. Among sediment factors, conductivity showed positive correlation with organic matter and total nitrogen. Organic matter also showed positive correlation with clay content. The pH showed negative correlation with conductivity, organic matter, available phosphorus, total nitrogen, and clay content, respectively. Content of clay showed positive correlation with silt, and sand showed negative correlation with clay and silt, respectively. 7. It was recommended that planting of willows is necessary to prevent the soil erosion and to offer the desirable landscape as soil stability is owed to them in the wetland ecosystem. The establishment of the nature reserve area is also considered to ensure the habitat for the animals and to maintain the diversity of the vascular hydrophytes and hygrophytes.

무채색 영역과 유사색모집단을 이용한 주변 광원의 분광방사 추정

이철희,오주환 경운대학교 산업기술연구소 2002 産業技術硏究論文誌 Vol.5 No.1(B)

본 논문은 채널로 입력된 영상으로부터 광원의 분광 방사 에너지 분포를 추정 할 수 있는 새로운 방법을 제안한다. 광원은 표면 반사(O(λ))에 대응하는 최대 무채색 영역(L(λ))의 반사되는 분광 방사 에너지 분포에 의해 추정된다. 3채널 영상으로부터 최대 무채색 영역의 분광 방사 에너지 분포를 획득하기 위하여 수정된 Gray-world assmption 알고리즘을 채택했다. 그리고 최대 표면 반사는 무채색 모집단으로 주성분 분석 방법을 사용해서 추정을 하였다. 무채색 모집단은 먼셀 컬러 색표에서 문턱값 보다 낮은 크로마 벡터를 사용해서 만들었다. 분리된 무채색 모집단의 제1에서 제3차까지의 누적 기여율은 약 99.75%이다. 무채색 모집단에 의해 광원의 분광 방사 에너지 분포의 재구성 그리고 여러 가지 광원 하에서 획득된 3채널 영상은 원본과 재현된 광원의 분광방사 에너지 분포를 RMSE에 의해 평가하고 실험 하였다.

실사 노면 영상에 기반한 헤드램프의 배광 해석 알고리즘

이철희,오주환 경운대학교 산업기술연구소 2001 産業技術硏究論文誌 Vol.3 No.2(A)

수종의 엔진구동형 Nickel-Titanium file을 이용한 근관형성 방법이 근관만곡도 유지능력에 미치는 영향

이철환,조경모,홍찬의 大韓齒科保存學會 2003 Restorative Dentistry & Endodontics Vol.28 No.1

There are increasing usage of Nickel-Titanium rotary files in modern clinical endodontic treatment because it is effective and fater than hand filing due to reduced step. This study was conducted to evaluate the effect of canal preparations using 3 different rotary Nickel-Titanium files that has different cross sectional shape and taper on the maintenance of canal curvature. Simulated resin block were instrumented with Profile(Dentsply, USA), GT rotary files(Dentsply, USA), Hero 642(Micro-Mega, France), and Pro-Taper(Dentsply, USA). The image of Pre-instrumentation and Post-instrumentation were acquired using digital camera and overspreaded in the computer. Then the total differences of canal diameter, deviation at the outer portion of curvature, deviation at the inner portion of curvature, movement of center of the canal and the centering ratio at the pre-determined level from the apex were measured. Results were statistically analyzed by means of ANOVA, followed by Scheffe test at a significance level of 0.05. The results were as follows; 1. Deviation at the outer portion of curvature, deviation at the inner portion of curvature were showed largest in Pro-Taper, so also did in the total differences of canal diameter(p<0.05). 2. All the groups showed movements of center. Profile combined with GT rotary files and Hero 642 has no difference but Pro-Taper showed the most deviation(p<0.05). 3. At the 1, 2, 3mm level from the apex movements of center directed toward the outer portion of curvature, but in 4, 5 mm level directed toward the inner portion of curvature(p<0.05). As a results of this study, it could be concluded that combined use of other Nickel-Titanium rotary files is strongly recommended when use Pro-Taper file because it could be remove too much canal structure and also made more deviation of canal curvature than others.

全州川의 水質汚濁에 관한 調査硏究

鄭遇喆,金煥起,李容源 全北大學校 附設 都市및環境硏究所 1987 都市 및 環境硏究 Vol.2 No.-

This paper analytically compared the water quality data with the effluent flow rate of the pollutent, in Chenju-cheon, during the past fifteen years. 1. The main sorces of pollutron were revealed as the domestic sewage and the industrial wastewater. 2. The yearly average of pollutant concentration has been decreasing but MPN has been incresing for the conversion of flush toilet. 3. ABS concentration has been decresing for the use of soft detergent. 4. The effluent flow rate of discharge was under the control of the geological and topographical property. 5. The discharge rate of BOD and SS was 29% and 6.5% at Hanbukru, 6% and 21% at Dukjinbo, 89% and 69% at Iseongbo.

입원치료를 요하는 소아의 급성복증

배택환,김준식,유인술,조준필,이철주,민영기 大韓應急醫學會 1996 대한응급의학회지 Vol.7 No.1

The acute abdomen defined as an acute abdominal condition which needs immediate decision for treatment is one of the most common cause for emergency care. One thound six hundreds nine patients were visited to pediatric emergency center due to acute abdomen. To aid in early diagnosis and proper treatment, a clinical review was made on 278 cases of acute abdomen under 15 yrs old which admitted to Pediatrics and General surgery via emergency center from June of 1994 to May of 1995. The results as follows: It was 17.3% of total visiting to pediatric emergency center due to gastrointestinal sysmptoms. The sex ratio(Male: Female) was 2.35:1. Acute gastroenteristis was the most common acute abdominal condition(54%) and followed by acute appendicitis(17.9%), and intussusception(13.9%). The most common chief commplaint was vomiting(58%) and followed by abdominal pain(39.4%), diarrhea(35.8%), and fever(42.1%). One hundred fifty-five patients were visited to pediatric emergency center via local clinic and thirty patients via OPDs. The operations were done in 75 patients. Among them, immediate operation were done in 60 patients and delayed operations were done in 15 patients, but there is no difference in complication.