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임봉수(Bong Su Lim),어성욱(Seong Wook Oa),정원문(Won Moon Chung) 한국물환경학회 2000 한국물환경학회지 Vol.16 No.4
This study was carried out to develop the new process for RBC process which is capable of nutrient removal and to obtain its design parameters for Sludge Settling Type Rotating Biological Contactors by comparing RBC with RBC combined with HBR (Hanmee Bio-Reactor). To achieve more than 90% of organic removal efficiency, organic loading rate less than 6.0g BOD/㎡/d is recommended. Nitrification rate was about 90% at 6.0g BOD/㎡/d. TN removal efficiency of RBC+HBR was higher than those of RBCl and RBC2. TN removal efficiency at condition of 5.0g BOD/㎡/d was about 60% in RBCl. When BOD loading rate was 6.0g BOD/㎡/d, TN removal efficiencies in RBC2 and RBC+HBR were about 70%, 80%, respectively. TP removal efficiency was more than about 67% for RBC1, about 63% for RBC2 and about 71% for RBC+HBR at the same loading rate. From the blank experiment to observe removal efficiency in the first stage, it can be known that COD removal efficiency was about 30% and suspend solids settling rate was about 45%. It was proved that RBC+HBR is much better in sludge dewatering than RBC.
현동주 ( Dong Ju Hyun ),이상주 ( Sang Ju Lee ),정원순 ( Won Soon Chung ),강진문 ( Jin Moon Kang ),김영구 ( Young Koo Kim ),김동현 ( Dong Hyun Kim ) 대한피부과학회 2016 대한피부과학회지 Vol.54 No.1
Keloids are benign cutaneous lesions that result from excessive collagen synthesis and deposition. Earlobe keloids are commonly seen as a complication of earlobe piercing and infection. Many different treatment modalities are available; however, therapeutic results are often unsatisfactory. Cryosurgery either used as monotherapy or in combination has been used successfully. However, keloids may require multiple sessions to achieve significant improvement and have a high rate of recurrence. Compared to conventional cryosurgery, intralesional cryosurgery has advantages of proper freezing of the deep layer of the lesion and a less harmful effect on the superficial layers. Herein, we present three cases of earlobe keloid effectively treated with intralesional cryosurgery. (Korean J Dermatol 2016;54(1):52∼55)
연구논문 : 서해안 염생식물 퉁퉁마디와 염습지의 중금속 축적
송우람 ( Uh Ram Song ),홍준의 ( Jun Euy Hong ),안지현 ( Ji Hyun An ),정지수 ( Ji Sue Chung ),문정원 ( Jeong Won Moon ),임정현 ( Jeong Hyun Lim ),이은주 ( Eun Ju Lee ) 한국환경과학회 2011 한국환경과학회지 Vol.20 No.4
Harvesting of marshfire glasswort (Salicornia europaea) by local people has been increased recently since this plant was known for a well-being food. Even though some harvesting sites are facing high risk of environmental pollution, Salicornia europaea is still harvested on a large scale. Therefore, to investigate safety of Salicornia europaea as a food resource, salt marsh environment, potential harvestable biomass, element and heavy metal accumulations in Salicornia europaea has been studied in three salt marshes, west-coast of Korea. Salicornia europaea showed 150-230g/m2/yr harvestable biomass. Biomass and nitrogen contents of Salicornia europaea were closely related to soil nitrogen and carbon concentrations. Average Na, Zn, Fe, Cr accumulations in Salicornia europaea were 41479, 18, 297, 1.5 (mg/kg), indicating valuable trace element contents. However, average heavy metal accumulations such as As, Cd, Cu, Pb, Hg accumulations were 1.5, 7.1, 4.2, 1.5, 0.1 (mg/kg), which were even or higher than national standards (0.5, 0.5, 2, 2, 0.1) of salts. These results imply that harvesting and eating of Salicornia europaea in west-coast research sites would be harmful because the contents would be much higher if it is calculated as only considering salts and minerals. Therefore, harvesting of Salicornia europaea from some salt marsh in west-coast of Korea should be done cautiously.
정원문,임봉수,김태응 大田大學校 環境問題硏究所 1999 환경문제연구소 논문집 Vol.4 No.-
This study was accomplished to estimate the biodegradability of sewage using RBC(Rotating Biological contactors) and to get a basic data for design parameters. RBC systems were applied to laboratory scale reactors with varying HRT feeding sewage as of about BOD 70mg/l, 80mg/l and 120mg/respectively. According to the continuous operation, it showed that RBC w/recycling was similar to RBC w/o recycling in poganic removal efficiency or TP removal effiency, but neither system effectively removed TN. To get the above 90% of BOD removal efficiency, both were recommended to design as BOD organic loading rate was less than about 4.5 to 6.0 g/㎡/d, hydraulic loading was less than about 80ℓ/㎡/d. It showed that RBC w/ recycling was inferior to RBC w/o recycling in TN removal effiency. At the 5.0g/㎡/d, TN removal efficiency RBC of w/ recycling and RBC w/o recycling was about 50%, 70%, respectively. SNR(Specific Nitrification Rate) was tending to increase as shorter HRT. SNR of RBC w/ recycling and RBC w/o recycling was 0.4mgNH₄-N/gMv/hr. 0.7 to 1.0mgNH₄-N/gMv/hr. respectively.
철광석 소결광의 Slag Volume 재평가 : 철광석 소결광중의 칼슘페라이트 제어-1 Control of calcium ferrite in iron ore sinter-1
정원배,정원섭,이대열,신형기,문석민 대한금속재료학회(대한금속학회) 1996 대한금속·재료학회지 Vol.34 No.3
Low SiO₂ and high basicity sintering tests were carried out to reduce the slag volume in sinter without causing any deterioration of sinter properties. New slag volume(NSV) was defined instead of slag volume as the concept of content of bonding material. Low SiO₂ and high basicity sintering condition reduced the slag volume from 21.0% to 19.3% without any deterioration of the productivity and the strength of sinter. The strength of sinter was determined to be highly dependent on the content of calcium ferrite. NSV, defined as the sum of slag volume and calcium ferrite content, proved to be a useful index for the strength of sinter. NSV increased with the decrease of SiO₂during fixed CaO content due to the increase of calcium ferrite although slag volume decreased. In pot tests, as SiO₂ content decreased from 5.90% to 5.28% while CaO remained at 10.5%, the productivity and the strength of sinter tended to improve.
동북아시아 지역의 국가적 월경환경오염 분석과 대처방안에 관한 연구
김태응,정원문,조남운,임봉수 대전대학교 산업기술연구소 1999 산업기술연구소 論文集 Vol.10 No.1
Recently, social agreement on the environment pollution has gradually increased in the national and global scope. Also in the last one decades fast industrialism in China has caused to the nations concerns and anxiety on the environmental problems of the North-East Asia including Japan. Korea located mostly close to China has been effected directly on the pollutant products produced from China and many environmental co-work problems of both nations has become to delayed objects anymore. The purpose of this study is to investigate cases and problems of the national overflowing environment pollution and describe answerings.
조영미,정원문,임봉수,박영성 대전대학교 환경문제연구소 2001 환경문제연구소 논문집 Vol.5 No.-
A concetrated evaporation experimnt was carried out in this study, to find out the removal and concoentration efficiency of havy metals from concentration process as well as analysis and investigation for the characteristics of the condensed water. In the experiment of wastewater treatment from X-ray film by using concentrated evaporation, the results show that COD removal efficency rate was more than about 99%, the major toxic metals, including Pb, CN, F, Zn was almost removed. It could be seen that the early boiling point of each wastewater was 108.5℃ for the wastewater of the fixing solution, 106.7℃ for the wastewater of developing solution and 107℃ for the mixture(1:1) of both wastewater. The increasing rate of boiling point was the greatest in the wastewater of the developing solution and the mixture and the wastewater of fixing solution in descending order. The boiling point under latm in a vacuum was 30℃ for the wastewater of the developing solution, 37℃ for the wastewater of fixing solutions, and 35℃ for the mixture.