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기술사 마당 - 낙동강(洛東江)주변의 체육센터시설물기초 연약지반(軟弱地盤)처리를 위한 DCMM 시공사례
조규영,김진억,정병찬,Cho, Kyoo-Yung,Kim, Jin-Eok,Jeong, Byeong-Chan 한국기술사회 2011 技術士 Vol.44 No.6
As the Deep Cement Mixing Method is composed of drilled natural soft soil structure and injected cement slurry to be mix together in it, the nature of excavated ground is influenced directly to the application of constructability. Also the nature of in situ soil is the main material, the mix design and construction work plan should be established before the investigation of soil which is performed through the whole site confirm the soil parameter before construction. The nature of investigated soil and water level as should be performed accurately.
서영호,김세원,최승출,정병찬,Seo, Young-Ho,Kim, Se-Won,Choi, Seung-Chul,Jeong, Byeong-Chan 한국잡초학회한국잔디학회 2012 Weed&Turfgrass Science Vol.32 No.1
The occurrence of sulfonylurea-resistant weeds has recently increased in Korea. A survey was performed to investigate major paddy field weeds and frequently used herbicides in Gangwon province, Korea in order to establish a system to efficiently control herbicide-resistant weeds. The dominant paddy field weeds included Monochoria vaginalis (14%), Sagittaria trifolia (14%), Scirpus juncoides (13%), and Echinochloa spp. (13%), and the most widely used herbicides were oxadiazon 12% EC (27%), butachlor 5% GR (20%), oxadiargyl 1.7% EC (16%), and benzobicyclon+imazosulfuron+pyriminobac-methyl 6.1% SC (14%) in Gangwon province, Korea. Many paddy rice growers considered Scirpus juncoides, S. trifolia, Echinochloa spp. and M. vaginalis as herbicide-resistant weeds. An extensive research deserves to be conducted to monitor occurrence of herbicide-resistant paddy weeds in Gangwon province, Korea.
Antibiotic Uptake by Plants from Soil Applied with Antibiotic-Treated Animal Manure
Young-Ho Seo(서영호),Byoung-Ouk Cho(조병욱),An-Seok Kang(강안석),Byeong-Chan Jeong(정병찬),Yeong-Sang Jung(정영상) 한국토양비료학회 2010 한국토양비료학회지 Vol.43 No.4
최근 축산용 항생제를 함유한 축산분뇨 퇴액비를 토양에 시용하였을 때 식물체가 항생제를 흡수할 수 있음을 보여주는 연구결과가 유럽과 미국에서 발표되었다. 클로르테트라싸이클린, 타이로신, 설파메타진 등 3종의 항생제를 처리한 돈분 액비를 처리하고, 상추, 토마토, 헤어리베치 등 3종을 기른 다음 식물체의 항생제 함량을 분석하여 항생제를 처리하지 않은 대조구와 비교하였다. 클로르테트라싸이클린 22.9 mg L<SUP>-1</SUP>, 타이로신 27.8 mg L<SUP>-1</SUP>, 설파메타진 32.4 mg L<SUP>-1</SUP> 수준의 항생제를 처리했을 때, 생체중 기준으로 클로르테트라싸이클린은 3.4 ng g<SUP>-1</SUP> 이하, 타이로신 20.1 ng g<SUP>-1</SUP> 이하, 설파메타진은 20.9-63.3 ng g<SUP>-1</SUP>가 검출되었다. Food contamination through antibiotic uptake by plants has been one of the major concerns regarding animal manure amendment to agricultural land. Antibiotic uptake by plants was tested with three veterinary antibiotics such as chlortetracycline (CTC), tylosin (TYL), and sulfamethazine (SMT) and three plants such as lettuce, tomato, and hairy vetch. Antibiotic-treated swine slurry was applied to a greenhouse soil before transplanting or sowing the plants. The treated antibiotic concentrations to the swine slurry were 22.9 mg CTC L<SUP>-1</SUP>, 27.8 mg TYL L<SUP>-1</SUP>, and 32.4 mg SMT L<SUP>-1</SUP>. Lettuce was harvested on 64 days after transplanting and 94 days for tomato and hairy vetch. Concentrations of CTC were 3.4 ng g<SUP>-1</SUP> for lettuce and 0.7 ng g<SUP>-1</SUP> for tomato on a fresh weight basis. For TYL, 20.1 ng g-1 from lettuce leaves and 3.0 ng g<SUP>-1</SUP> from whole hairy vetch were detected. Sulfamethazine showed greatest concentration among the three antibiotics, 63.3 ng g<SUP>-1</SUP> in lettuce leaves, 30.2 ng g<SUP>-1</SUP> in tomato fruits, and 20.9 ng g<SUP>-1</SUP> in hairy vetch. The results imply that antibiotic uptake by plants may be dependent on antibiotic type and plant type.