만삭 전 조기양막파열 임부의 정맥혈장과 양수 내 지질과산화 및 항산화능

이광수 ( Kwang Su Lee ),김윤하 ( Yoon Ha Kim ),김석모 ( Seok Mo Kim ),김철홍 ( Cheol Hong Kim ),조문경 ( Moon Kyoung Cho ),김종운 ( Jong Woon Kim ),강우대 ( Woo Dae Kang ),박소정 ( So Jeong Park ),조혜연 ( Hye Yeon Cho ),안봉환 ( 대한산부인과학회 2009 Obstetrics & Gynecology Science Vol.52 No.1

목적: 만삭 전 조기양막파열 임부의 정맥혈장과 양수 내 염증성 cytokine, 지질과산화물, 항산화능 및 항산화제의 변화를 측정하고 이들을 정상 임부의 것과 비교분석하여 만삭 전 조기양막파열 병태생리에 어떤 역할을 하는가 규명하고자 하였다. 연구 방법: 임신 25주 이상 37주 미만의 정상 임부 20명과 만삭 전 조기양막파열 임부 20명으로부터 상완정맥혈을 채취하여 혈장을 얻고 양수천자를 하여 양수를 얻었다. Enzyme-linked immunosorbent assay kit을 이용하여 interleukin (IL)-6 농도를 측정하였다. Thiobarbituric acid 반응을 이용하여 지질과산화물 농도, Cao의 방법으로 항산화능을 측정하고, high performance liquid chromatography를 이용하여 항산화 성분들을 측정하였다. 결과: 1. 혈장과 양수 내 IL-6 농도는 정상 임부군보다 만삭 전 조기양막파열군의 혈장과 양수에서 모두 유의하게 증가하였다(P<0.01)(P<0.01). 2. 혈장과 양수 내 지질과산화물 농도는 정상 임부군보다 만삭 전 조기양막파열군의 혈장과 양수에서 모두 유의하게 증가하였다 (P<0.01)(P<0.01). 3. 혈장과 양수 내 항산화능 값은 정상 임부군보다 만삭 전 조기양막파열군의 혈장과 양수에서 모두 유의하게 감소하였다(P<0.01)(P<0.01). 4. 혈장과 양수 내 항산화능 값/지질과산화 농도의 비는 정상 임부군보다 만삭 전 조기양막파열군의 혈장과 양수에서 모두 유의하게 감소하였다 (P<0.01)(P<0.01). 5. 혈장과 양수 내 아스코르비산 농도는 정상 임부군보다 만삭 전 조기양막파열군에서 모두 유의하게 감소하였다 (P<0.05)(P<0.01). 6. 혈장과 양수 내 요산, 베타-카로텐, 레티놀, 알파-토코페롤, 감마-토코페롤 농도는 서로 간에 유의한 차가 없었다. 결론: 만삭 전 조기양막파열 임부의 정맥혈장과 양수 내 염증성 cytokine 반응이 증가하였고, 지질과산화가 증가하고, 또한 항산화능은 감소하는 산화적 스트레스를 나타내었으며, 항산화제 중 아스코르빈산이 감소하였음을 알 수 있었다. 이러한 결과는 항산화 비타민인 아스코르빈산이 만삭 전 조기양막파열 병태생리에 중요한 역할을 할 것임을 시사하고 있다. Objective: To evaluate their roles in the pathophysiology of preterm premature rupture of membranes (PPROM), we checked interleukin (IL)-6, lipid peroxide, oxygen-radical absorbance capacity (ORAC) and antioxidant vitamin in the venous plasma and amniotic fluid of women with PPROM. Methods: Venous plasma and amniotic fluid was taken from 20 normal pregnant women and 20 PPROM pregnancy women. IL-6 levels was determined by enzyme-linked immunosorbent assay. Lipid peroxide levels were measured by thiobarbituric acid reaction. The ORAC levels and the antioxidant levels were measured by Cao`s method and by high performance liquid chromatography. Results: The IL-6 levels in the venous plasma and amniotic fluid of PPROM pregnancy women were significantly higher than normal pregancy (P<0.01, P<0.01). The lipid peroxide levels in the venous plasma and amniotic fluid of PPROM pregnancy women were significantly higher than normal pregancy (P<0.01, P<0.01). The ORAC values in the venous plasma and amniotic fluid of PPROM pregnancy women were significantly higher than normal pregancy (P<0.01, P<0.01). The ORAC values/lipid peroxide levels in the venous plasma and amniotic fluid of PPROM pregnancy women were significantly higher than normal pregancy (P<0.01, P<0.01). The ascorbic acid levels in the venous plasma and amniotic fluid of PPROM pregnancy women were significantly higher than normal pregancy (P<0.05, P<0.01). Conclusion: This result suggest that the increased inflammatory bioactivity, increased lipid peroxidation and decreased antioxidant activity may be involved in the pathophysiology of PPROM. Low levels of ascorbic acid appears to be an important determinant of PPROM.

PP 섬유를 함유한 고강도 철근콘크리트 기둥의 폭열 특성에 관한 실험적 연구

강신준 ( Kang Shin-june ),신성우 ( Shin Sung-woo ),이광수 ( Lee Kwang Su ),안종문 ( An Jong Mun ),유석형 ( Yoo Suck Hyung ) 한국구조물진단유지관리공학회 2004 한국구조물진단유지관리공학회 학술발표대회 논문집 Vol.8 No.2

A spalling is defined as the damages of concrete exposed to high temperature during the fire by causing cracks and localized bursting of small pieces of concrete. It is reported that spalling is caused by the vapor pressure and polypropylene(PP) fiber has an important role in protecting from spalling. The properties of fire resistance of high-strength reinforced concrete columns under various concrete strength and various contents of PP fiber were investigated in this study. Inner temperature was measured by three thermocouples located in specimens. For one hour heating the temperature of thermocouple at 25mm was rapidly raised because of covering exfoliation by spalling. After one hour heating Spalling occured in specimens contained PP fiber of 0% and 0.1, but it didn’t occur in specimen contained PP fiber of 0.2%. As a residual strength test result, the loss of axial load decreases as the amount of PP fiber increases.

PP 섬유를 함유한 고강도 철근콘크리트 기둥의 폭열 특성에 관한 실험적 연구

강신준(Kang Shin-June),신성우(Shin Sung-Woo),이광수(Lee Kwang Su),안종문(An Jong Mun),유석형(Yoo Suck Hyung) 한국구조물진단유지관리학회 2004 한국구조물진단학회 학술발표회논문집 Vol.- No.-

A spalling is defined as the damages of concrete exposed to high temperature during the fire by causing cracks and localized bursting of small pieces of concrete. It is reported that spalling is caused by the vapor pressure and polypropylene(PP) fiber has an important role in protecting from spalling The properties of fire resistance of high-strength reinforced concrete columns under various concrete strength and various contents of PP fiber were investigated in this study Inner temperature was measured by three thermocouples located In specimens For one hour heating the temperature of thermocouple at 25mm was rapidly raised because of covering exfoliation by spalling. After one hour heating Spalling occured in specimens contained PP fiber of 0% and 01, but it didn't occur in specimen contained PP fiber of 0.2%. As a residual strength test result the loss of axial load decreases as the amount of PP fiber Increases.

충남 외연도 산림관리를 위한 지역주민의 인식 분석

이호상 ( Lee Ho-sang ),현창석 ( Hyun Chang-seok ),정수영 ( Jung Su-young ),이광수 ( Lee Kwang-soo ),강경식 ( Kang Kyeong-sik ),김용구 ( Kim Yong-gu ) 한국도서(섬)학회 2020 韓國島嶼硏究 Vol.32 No.2

산림은 우리나라 외형의 가장 많은 부분을 차지하고 있으며 인간 생활에 미치는 영향은 매우 지대하다. 특히 전 국토의 64%가량을 점유하고 있는 산림을 미래의 삶의 터전으로 가꾸어 나가야 하는 필요성은 절실하다. 또한, 도서 지역의 산림도 생태적으로나 지역주민의 경제활동 장소 및 환경자원으로서 그 가치를 발휘하고 있다. 산림청은 도서 지역 산림관리를 위하여 도서 지역 산림 가꾸기 사업을 추진하고 있지만, 예산의 한계 등으로 사업 범위는 매우 협소한 수준이며, 지역주민이 참여하는 도서 산림관리에 대한 방안도 부족한 현실이다. 또한, 도서 지역 산림은 지역주민의 사회ㆍ경제적 특성에 따라 기능이 다르게 요구되고 있다. 그러나 현재의 획일적인 계획에 의한 산림관리로는 도서 지역마다 다르게 나타나는 다양한 특성을 고려하여 산림기능을 발휘하는 데 한계가 있다. 본 연구는 도서 지역 산림에 관한 관심과 중요도가 증가함에 따라 지역주민이 참여하는 산림관리를 위해 외연도 지역주민을 대상으로 지역 산림에 대한 인식과 산림사업에 대한 중요도 만족도 분석을 실시하였다. 조사결과 도서 지역 산림에 대한 활용은 취미 생활(산책, 등산 등)이 48.9%, 산나물이나 약초 채취 19.1%, 산림휴양과 치유 14.9% 순으로 나타나, 휴양문화 및 치유의 공간으로 이용(63.8%)되고 있었다. 외연도 주민들은 산림 이용에 대한 만족도(2.87)는 낮게 나타났으며, 도서 지역 산림 보전이 도서가치 증진에 매우 중요하게 인식하고 (72.3%) 있었다. 지역주민들은 해당 지방자치단체에서의 도서 지역 산림보호에 대한 대응이 부족하다고 인식하고(46.8%) 있으며, 도서 지역 산림 위기에 대한 심각성(57.5%)을 인식하고 있었다. 산림사업에 대한 중요도-만족도 값은 유의미한 차이를 보였으며, 모두 양(+)의 값이 나와 중요도에 비해 만족도가 낮게 나타났다. IPA 대각선모형 분석결과 지속적 유지관리영역에는 등산로ㆍ둘레길 조성이 포함되었고, 중점적 개선 영역에는 숲 가꾸기 사업, 산림휴양조성 사업, 산림재해 방지, 산림생태계 보전 및 관리가 포함되었으며, 저 우선순위로 분류된 것은 없으며, 과잉노력 지양에는 조림사업, 산림자원을 활용한 지역 활성화 사업이 포함되었다. 연구결과는 지역주민의 의견을 반영한 도서 지역 산림사업 추진 필요성을 시사한다. Forests account for the largest portion of Korea's terrain and have a significant impact on human life. In particular, it is imperative that forests, which account for 64 percent of the country, should be cultivate and managed into a sustainable future home for life. In addition, forests in the island areas show their value as places of economic activity and environmental resources for local residents. The Korea Forest Service is promoting forest conservation projects in the island areas for forest management, but the scope of the project is very narrow due to budget limitations. In addition, there is a lack of plans for forest management in the island areas where local residents participate. This study analyzed the awareness of local forests and the importance-satisfaction correlation of forest projects for forest management in which local residents participate. With the residents on Oeyundo, the interest and importance of forests in the island area increased. According to the survey, the local residents' use of island forests was found to be 48.9% for hobbies (walking, hiking etc.), 19.1% for picking wild herbs and plants, and 14.9% for general forest recreation and healing. It was used as a space for recreational culture and healing using forest resources(63.8%). The island residents are not satisfied(2.87) with the use of forests, and the preservation of forests in the island area is very important and recognized(72.3%) in improving the value of the island. The island residents recognized that the local governments had insufficient resources and funding to cope with forest protection in the island area(46.8%), and recognized the seriousness of the forest crisis in the island area (57.5%). The importance-satisfaction value of forest projects showed significant difference, and all of them showed positive(+) values and satisfaction was lower than importance. As a result of analyzing the IPA diagonal model, the “Keep UP the Good Work” area includes 'mountaineering trails and dulle-gil'. The ‘Concentrate Here’ area includes 'forest tending operation', 'recreational forest', 'prevention of forest disaster', and the 'conservation and management of forest ecological system'. There is no classification in the ‘Low Priority’ area, and the ‘Possible Overkill’ area includes 'afforestation of forest resources' and 'regional specialization using forest resources'. The results of this study suggest the necessity of promoting forest projects in the island areas by reflecting the opinions of local residents.

GIS 기법을 이용한 산림의 다목적 기능개발

정영관,손영모,이광수,강진택,정수영 ( Young Gwan Chung,Yeong Mo Son,Kwang Soo Lee,Jin Taek Kang,Su Young Jung ) 한국산림경제학회 1996 산림경제연구 Vol.4 No.2

삼나무 임분수확량 평가 및 예측

손영모 ( Yeong Mo Son ),강진택 ( Jin Taek Kang ),황정순 ( Jeong Sun Hwang ),박현 ( Hyun Park ),이광수 ( Kang Su Lee ) 한국산림과학회 2015 한국산림과학회지 Vol.104 No.3

The objective of this paper is to look into the growth of Cryptomeria japonica stand in South Korea along with the evaluation on their yields, followed by their carbon stocks and removals. A total of 106 sample plots were selected from Jeonnam, Gyeongnam, and Jeju, where the groups of standard are grown. We only used 92 plots data except outlier. As part of the analysis, the Weibull diameter distribution was applied. In order to estimate the diameter distribution, the growth estimation equation for each of the growth factors including the height, the diameter at breast height, and the basal area was drafted out and the verification for each equation was examined. The site index for figuring out the forest productivity of Cryptomeria japonica stand for each district was also developed as a Schumacher model and 30yr was used as a reference age for the estimation of the site index. It was found that the site index for Cryptomeria japonica stand in South Korea ranges from 10 to 16 and this result was used as a standard for developing the stand yield table. According to the site 14 in the stand yield table, the mean annual increment (MAI) of the Cryptomeria japonica reaches 7.6 m3/ha on its 25yr and its growing stock is estimated to be at 190.1 m3/ha. This volume is about 20 m3 as high as that of the Chamaesyparis obtusa. Furthermore, the annual carbon absorptions for a Cryptomeria japonica stand reached the peak at 25yr, which is 2.14 tC/ha/yr, 7.83 tCO2/ha/yr. When compared to the other conifers, this rate is slightly higher than that of a Chamaecyparis obtusa (7.5 tCO2/ha/yr) but lower than that of the Pinus koraiensis (10.4 tCO2/ha/yr) and Larix kaempferi (11.2 tCO2/ha/yr). With such research result as a base, it is necessary to come up with the ways to enhance the utilization of Cryptomeria japonica as timbers, besides making use of their growth data.

로터리테이블용 롤러기어캠의 5-축 가공에 관한 연구

조현덕(Hyun-Deog Cho),박종배(Jong-Bae Park),신용범(Yong-Bum Shin),이광수(Kang-Su Lee) 한국기계가공학회 2017 한국기계가공학회지 Vol.16 No.4

A rotary table is a positioning device used in metalworking for the multiple axes of machine tools, and the utilization trend is increasing with machining efficiency. In the construction of a rotary table, the core technology is a power transfer unit that drives the table, typically a gear type and a roller gear cam type. As the rollers installed on the turret column have rolling movement on the contact surface of the roller gear cam, the roller gear cam type has the advantage of low wear, high load, and fast driving. Therefore, it is currently being replaced by a roller gear cam type. In this study, we researched a 5-axis machining method for the roller gear cam on a rotary table and a new method of applying double roller gear cam curve to reduce the noise and shock between the roller and the cam surface. We implemented the 5-axis machining process in this study using software to generate NC-code and machined the roller gear cams using a Mazak Integrex-200IV. We found that the roller gear cam and turret were able to identify mutual touch status and the noise from the operation of the roller gear cam was substantially reduced.

개 디스템퍼 의사 환견의 확진 예측요인

윤하정 ( Ha Chung Yoon ),박최규 ( Choi Kyu Park ),이광수 ( Kwang Su Lee ),이순우 ( Soon Woo Lee ),강명곤 ( Myung Gon Kang ),김태종 ( Tae Jong Kim ) 한국수의공중보건학회 2007 예방수의학회지 Vol.31 No.3

유산균을 이용한 발효약초부각의 영양성분, 조직감 및 항산화

고영란 ( Young Ran Ko ),손미예 ( Mi Yae Shon ),왕수빈 ( Su Bin Wang ),이광수 ( Kang Soo Lee ),강성구 ( Seong Koo Kang ),박석규 ( Seok Kyu Park ) 한국식품저장유통학회 ( 구 한국농산물저장유통학회 ) 2009 한국식품저장유통학회지 Vol.16 No.3

난대지역 주요 4개 수종의 탄소배출계수 개발 및 적용

손영모 ( Yeong Mo Son ),김래현 ( Rae Hyun Kim ),강진택 ( Jin Taek Kang ),이광수 ( Kwang Su Lee ),김소원 ( So Won Kim ) 한국산림과학회 2014 한국산림과학회지 Vol.103 No.4

In this study, we developed the carbon emission factors for 4 major species of warm-temperate regionin Korea, and tried to provide their carbon emissions and removals estimates using these carbon emissionfactors. We selected Castanopsis cuspidata, Camellia japonica, Quercus acuta and Quercus glauca as targetspecies and derived their carbon emission factors. The basic wood density that serve as one of the carbonemission factors were 0.583 for Castanopsis cuspidata, 0.657 for Camellia japonica, 0.833 for Quercus acutaand 0.763 for Quercus glauca and their uncertainties ranged from 5.3 to 17.9%. Biomass expansion factors werecalculated as well: 1.386 for Castanopsis cuspidata, 2.621 for Camellia japonica, 1.701 for Quercus acuta and2.123 for Quercus glauca and associated uncertainties varied from 14.7 to 30.5%. Lastly root-shoot ratios foreach species were also determined: 0.454 for Castanopsis cuspidata, 0.356 for Camellia japonica, 0.191 forQuercus acuta and 0.299 for Quercus glauca with the uncertainties lying within a range from 19.8 to 35.7%. These three carbon emission factors including basic wood density had the uncertainties of less than 40%recommended by FAO. Therefore the application of country-specific emission factors seemed to provide quiteaccurate estimates of carbon emissions and removals. The estimation of the carbon stored in the 4 species werealso conducted which amounted to 186.10 tCO2/ha for Castanopsis cuspidata, 280.63 tCO2/ha for Camelliajaponica, 344.04 tCO2/ha for Quercus acuta and 278.91 tCO2/ha for Quercus glauca and their annual carbonremovals were 6.65 tCO2/ha/yr, 6.25 tCO2/ha/yr, 11.70 tCO2/ha/yr and 12.29 tCO2/ha/yr, respectively. Thissystematic assessment of forest resources can be a reliable source of information for managing evergreen broadleavedforest in warm temperate regions and thus serve as useful data for effective decision-making to addressvegetation zone shifts due to climate change.