농축산 폐기물 처리를 위한 저온내성(低溫耐性) 메탄 생성균의 특성에 관한 연구 : 1. 저온조건에서 시료별 메탄 생성기작 연구

정광용,김재정 한국환경농학회 1993 한국환경농학회지 Vol.12 No.1

本 硏究는 低溫期의 農畜産 廢棄物 처리를 위한 嫌氣醱酵 效率을 增進코저 低溫에 耐性을 갖는 메탄 生成菌株를 開發하여 醱酵 母菌으로 이용하려 하였다. 試驗에 사용한 試料는 北緯 34.8~37.4度의 國內, 北緯 41.4度 地域인 美國의 中北部 및 北緯 54.5~56.9度의 카나다 亞寒帶 地域의 土壤, 늪지 堆積物, 水中 堆積物 및 有機物 堆積層 등을 採取하여 사용하였다. 採取된 試料는 低溫條件에서 메탄 生成量의 測定, 低溫耐性 메탄 生成菌의 生態的 特性을 調査하였으며 그 結果는 다음과 같다. 1. 低溫에서 메탄 生成量은 Cellulose 培地가 Methanol 培地보다 더 높았다. 2. 低溫(8℃)에서의 CH_4 發生量은 亞寒帶 地域 늪지 堆積物에서 30일 동안에 15~19 moles/ml 로 높았으나 溫帶地域 試料에서는 檢出되지 않았다. 3. 亞寒帶 地域 試料(카나다, 54.5 ˚N)의 집적 培養液에 메탄 생성균에 영향을 주지 않는 40 ㎍/ml의 Streptomycin + Vancomycin 또는 Ampicillin + Oleandomycin 처리로 CH_4生成量이 57~67% 抑制되었다. 4. 溫帶地域 試料에는 高溫에 耐性을 갖고 있는 메탄 生成菌株 가 있으며, 亞寒帶 地域의 試料에는 高溫性菌이 存在하지 않는 반면에 8~13℃ 의 低溫에 耐性을 갖는 메탄 生成菌株의 존재를 확인할 수 있었다. The Study was conducted to develope the low temperature tolerant methane-producing bacteria(LTTB) and to increase the efficiency of anaerobic fermentation for the treatment of agricultural and livestock wastes at low temperature. The samples were collected from muddy soil, water logged sediment, organic layer and anaerobic sludge at three latitudes, 34.8~37.4 ˚N(Korea), 41.4 ˚N(USA) and 54.5~56.9 ˚N(Canada). They were used for determination of the methanogenesis rates for isolation and identification of the LTTB. The methanogenesis rate of smaples at low temperature were higher in the cellulose medium than methanol medium. The methanogeneses rate in the samples of subarctic region were 15~19 moles/ml during 30 days at low temperature(8 ℃), whereas not detected in the samples of temperate region. The methanogenesis rate in the enrichment culture of subarctic samples were inhibited by the 40 ㎍/ml of streptomycin + vancomycin or ampicillin + oleandomycin which were not effect to the methanogens. An inhabitation of high temperature tolerant methane producing bacteria was identified in the samples of temperate region, whereas that of the LTTB growing at 8~13℃ was identified in the subarctic region.

남한산성 여장 손상원인 분석

정광용,이상옥,양희제,Chung, Kwang-Yong,Lee, Sang-Ok,Yang, Hee-Jae 한국건축역사학회 2016 건축역사연구 Vol.25 No.1

There are many reasons of damage in Namhansanseong Yeojang. Lots of damage types are observed in each Yeojang. There are many types of damage factors but major damage factor is breakage by freezing and thawing. So Conduct non-destructive evaluation about damage factors in Namhansanseong Yeojang to analysis weathering factors in Yeojang by measuring directional microclimate. The study will pave the way for conservation management in Namhansanseong by suggesting the conservation calendar about weather condition and damage factors.

수자원 기초 조사 활성화를 위한 자문회의 개최

정광용 한국수자원학회 1993 물과 미래(한국수자원학회지) Vol.26 No.3

畜産廢水 處理技術

鄭光溶 농촌진흥청 1993 농촌생활과학 Vol.14 No.1

서천 오석리유적 출토 토기복원

정광용,강태춘,임세진,Chung, Kwang-yong,Kang, Tae-chun,Lim, Se-jin 국립문화재연구소 2007 保存科學硏究 Vol.28 No.-

Restoration of earthenware is largely composed of selection of clay, making(forming), and firing. This study lays emphasis on the making method and open-air firing. For making methods, This study used coiling method partly with priority given to ring method. The most significant feature of this restoration work is the making method of tap-forming, in which 외박자(out tap instrument) and 내박자(inter tap instrument) would be tapped and formed. For firing, This study used open-air firing method in the most primitive way. This method needs no special device and equipment and makes the work more simple and easy. The previous study was on the making method by archeological and preservation-scientific research but this study emphasized the restoration work in an actual earthenware maker's position. Through the result of this study, This study wish this would be an opportunity to present another model of various restoration methods for other researchers those who wanted to participate in the restoration and openair firing.

전(塼)의 백화현상 규명 및 제거방안 연구 - 수원화성 백화현상을 중심으로 -

정광용,차현석,Chung, Kwang-Yong,Cha, Hyun-Seok 한국건축역사학회 2013 건축역사연구 Vol.22 No.6

This study progressed an investigation on the cause of the efflorescence phenomenon of bricks in Suwon Hwaseong Fortress, which is designated as a UNESCO World Heritage by using diverse scientific analyses. The samples were taken in Hwaseong and analyzed using XRD and SEM-EDS for the material identification of efflorescence. We observed under a polarizing microscope and measured absorption factors for the basic investigation for traditional bricks. As a result of material identification, soluble salt($Na_2SO_4$, $KNO_3$) and insoluble salt($CaCO_3$) were detected. There was no big difference between original bricks and repaired bricks under the polarizing microscope. However, in terms of the water absorption rate, bricks which were used for repair nowadays showed low water absorption rate(1%). In conclusion, soluble salt and insoluble salt appeared due to an effect of an air pollution and joint mortar. Soluble salt was removed in the rainy season, but insoluble salt was not removed. As a result of the efficiency and safety tests for chemicals removing efflorescence, chemical E is likely to be the suitable chemicals for the efflorescence phenomenon of traditional bricks in Suwon Hwaseong Fortress. In the future, consideration whether the use of lime is available or not should be studied through comprehensive researches including repair work, construction work and the environment factor with lime. Also, physical, chemical identifications of repairing bricks will be required.

음식물 쓰레기의 퇴비화의 문제점과 개선 방안

정광용,Jeong, Gwang-Yong 환경보전협회 1996 환경정보 Vol.18 No.7

The Acid Resistance Effect of I-Con Infiltrative Resin on the Initiative Eroded Tooth Enamel

정광용,이규환,안금선 대한예방치과학회 2011 International Journal of Clinical Preventive Denti Vol.7 No.4

Objective: I-Con, infiltrative flow resin was introduced in order to control the white spot on the tooth enamel. Methods: Sixty specimens from 10 teeth were distributed as 6 groups as white spot group, sealant group and I-Con applied group, both on occlusal and at the proximal surface, and treated with the sealant or I-Con for each classified group, for 10 specimens. Micro-hardness test on dentinal surface was measured for each sample and SEM and stereo microscopic findings were observed for each group and compared the infiltration phenomena on the enamel with the white spot. Results: It revealed the most in micro-hardness in I-Con applied group and sealant group was the next, and the least in white spot group (p<0.05). Infiltration of the resin was shown in I-Con specimen, on the other hands, remarkable marginal smoothen in sealant and irregular or roughness in white spot specimen, by observing with SEM and stereo microscope. Conclusion: I-Con, infiltrative flow resin was recommended to apply for white spot enamel as early caries prevention or control. Objective: I-Con, infiltrative flow resin was introduced in order to control the white spot on the tooth enamel. Methods: Sixty specimens from 10 teeth were distributed as 6 groups as white spot group, sealant group and I-Con applied group, both on occlusal and at the proximal surface, and treated with the sealant or I-Con for each classified group, for 10 specimens. Micro-hardness test on dentinal surface was measured for each sample and SEM and stereo microscopic findings were observed for each group and compared the infiltration phenomena on the enamel with the white spot. Results: It revealed the most in micro-hardness in I-Con applied group and sealant group was the next, and the least in white spot group (p<0.05). Infiltration of the resin was shown in I-Con specimen, on the other hands, remarkable marginal smoothen in sealant and irregular or roughness in white spot specimen, by observing with SEM and stereo microscope. Conclusion: I-Con, infiltrative flow resin was recommended to apply for white spot enamel as early caries prevention or control.

교전용 장거리 다기능 레이다 기술 동향 및 발전 방향

정광용 한국전자파학회 2014 전자파기술 Vol.25 No.2

慶州 乾川 龍明里 製鐵遣蹟 製鐵爐 硏究

鄭光龍 한국전통문화대학교 한국전통문화연구소 2006 한국전통문화연구 Vol.4 No.-