강원도 화천군 수달(Lutra lutra) 서식지의 식생 구조

서형수 ( Hyung Soo Seo ),신영섭 ( Young Seob Shin ),이경은 ( Kyung Eun Lee ),김윤미 ( Yoon Mi Kim ),전미나 ( Mina Jeon ),남택우 ( Taek Woo Nam ),한성용 ( Sung Yong Han ),정연숙 ( Yeonsook Choung ) 한국하천호수학회 2014 생태와 환경 Vol.47 No.special

In order to determine whether vegetation would be one of the factors for the selection of otter home range, vegetation structure and other potential factors were studied in Hwacheon, Korea. Thirteen sites, otter’s activity found and not found, were investigated in North Han River and connected tributary streams of Hwacheon-gun. Three types of vegetation were classified by cluster analysis, which is short grass, tall grass and shrub type. Vegetation zone of each channel is composed of either one type, or mosaic of tall grass and shrub type. Short grass type is common in Lake Paro and upper North Han-river where water level is highly variable throughout a year. Therefore, annual species such as Persicaria nodosa, Fimbristylis dichotomam and Chenopodium ficifolium are the most dominant. Shrub type is common at the downstream sites of Jichon stream and along mainstream of North Han River down Lake Paro. A shrub species, Salix koreensis, is the most common. Tall grass type is dominant occupying the most vegetation zone of the tributary channels. Phragmites japonica is absolutely dominant. Due to its dense cover, a few plant species are co-existed. Otter activity was found in all three vegetation types and no marked activity was found at some sites of tall grass type. There is no difference in species composition and physiognomy between tall grass sites with and without otter activity, while it shows significant difference in fish availability between two groups. Overall we found that home range of otters in the region is along the mainstream and downstream of tributary streams with high fish availability in all vegetation types and in various human activity levels.

平面式 太陽熱集熱機를 利用한 紅蔘乾燥

張奎燮,金相達,洪淳根,尹漢敎 한국응용생명화학회 1982 Applied Biological Chemistry (Appl Biol Chem) Vol.25 No.3

密閉式물 交換太陽 熱集熱乾燥製置를 利用하여 紅蔘을 乾燥할때의 集熱效率, 乾燥效率. 乾燥特性 및 製品의 品質을 各各 調査하였다. 乾燥其間은 太陽熱集熱製置를 利用한 것이 慣行法보다 3分의 1程度를 더 短 할 수 있었다. 乾燥其間中集熱機의 最大效率은 14.42% 最低效率은 4.73%였고 乾燥效率은 集熱製置를 利用한 것이 28.34%, 對照區가 13.45%로서 純粹乾燥效率은 14.89%이었다. 紅蔘의 乾燥率曲線은 減率乾燥期만을 나타내었으며, 이 때의 式은 Y=50.7023t.-014138 이었다. 乾燥紅蔘의 色度는 慣行法과 比較하여 더 높았으며, diphenylpicryl hydrazyl 遇元能도 같은 傾向을 보였다. A closed solar collector drying system by water exchange was evaluated for the drying of ginseng. The thermal efficiency of solar collector, drying efficiency, drying characteristics and product quality were investigated. The drying period was reduced by one-thirds in comparison with typical method. The maximum and minimum thermal efficiency of the solar collector during drying period were 14.42%, and 4.73%, respectively. The drying efficiency of solar collector and control system showed 28.34%, and 13.45%, respectively: net drying efficiency being 14.8%. The drying rate curve of red ginseng showed only falling rate period, and its equation was Y=50.7023t.^(-0.4138) The brown color intensity of red ginseng was higher in solar collector drying system than in typical method, and reductivity by diphenyl picryl hydrazil solution in red ginseng extract showed similar result to brown color intensity.

점토성분에 의한 Pb^2+ 및 Cd^2+의 흡착특성에 관한 연구

이한섭 龍仁大學校 自然科學硏究所 1999 自然科學硏究所論文誌 Vol.4 No.2

This study deals with the adsorption characteristics of heavy metal by adsorbents, kaolinite, momtmollinite and bentonite in aquous solution. The adsorption of Pb2+ and Cd2+ to eqilibrium adsorption reached approximately 1 hour. In acid pH range were more favorable increasing adsorptivity. Generally, the adsortivity of Pb2+ besser than that of Cd2+ .The adsorption isotherm equation of Pb2+ agreed with the Freundlich isotherm, the Freundlich constant(1/n) of kaolinite, montmollinite and bentorlite was 0.195, 0.274 and 0.34. Its value meaned a good adsorbent for the remove of Pb2+.

機能性 防水材 合成을 僞한 廢Urethane의 再活用에 關한 硏究

이한섭 용인대학교 자연과학연구소 2004 自然科學硏究所論文誌 Vol.8 No.2

The problems of recycling polyurethane wastes have major technological, economic and ecological significance because polyurethane itself is relatively expensive and its disposal whether by burning is also costly. In general, the recycling methods for polyurethane could be classified as mechanical, chemical and feedstock. In the chemical recycling method, there are hydrolysis, glycolysis, pyrolysis and aminolysis. In this study, the work was carried out glycolysis using sonication and catalyzed reaction for waste scrap. Different kinds of recycled polyols were produced by current method, catalyzed reaction and sonication as decomposers and the chemical properties were analyzed. The recycled polyol of sonication reaction had much higher OH value, much lower decomposition temperature and time than the recycled polyol of current method in which same glycols and catalyst were used. We were prepared to recycling urethane waterproofing agent with recycling polyol and were measured with it to mechanical property such as strength, elongation etc. Also, In this study, antibacterial and antistatic waterproofing agent were prepared by hardness mechanism using different ratios of various materials with functionality resin. Various chemical and physical properties of antibacterial waterproofing agent were measured by test method. Antibacterial waterproofing agent was prepared by simple blending method with 0.5~5.0wt% of natural materials. Antibacterial susceptibility was determined against Streptococcus pyrogenes[Gram (+)] and Esherichia. coli.[Gram(-)] using a standardized disc test. As a result, Blending antibacterial waterproofing agent exhibited the broad susceptibility against Streptococcus pyrogenes and Esherichia. coli. Especially, the bacteriostatic effect of antibacterial waterproofing agent against Gram negative (Esherichia. coli) was much stronger than against Gram positive (Streptococcus pyrogenes).

구내 골신장술 후 식립된 전치부 임플란트보철 치험보고

김한석,김명래,이성근,강상원,김기환,김형섭 大韓顎顔面成形再建外科學會 2003 Maxillofacial Plastic Reconstructive Surgery Vol.25 No.1

Objective : This is to report the effectiveness of intraoral distraction osteogenesis for alveolar augmentation in the extremely atrophied alveolar defects and to review the clinical results of the 2 cases. Subjects and Methods : Anterior segmental osteotomy was performed and the trans-oral alveolar distractors(Martin, Germany) were applied in 2 patients with the severe acquired anterior maxillary and mandibular defect. After latent period for 1 week, the osteomized alveolar segments were distracted by 1 ㎜ a day (0.5 ㎜/l turn) for 8 days in case Ⅰ and 0.6 ㎜ a day(0.3 ㎜/l turn) for 10 days in case Ⅱ. The consolidation period was about 8 weeks in each case. Thereafter, 6 titanium threaded implants(Branemark, Restore) were simultaneously installed with removal of distractor. The implants were tested clinically and radiographically. Results : Amounts of acquired alveolar bone were 8 ㎜ in case Ⅰ and 6 ㎜ in case Ⅱ respectively, with the increased width of the ridge crests and soft tissue expansion. Dental implants installated on the augmented alveolar ridges in 8 weeks after distrction were confirmed as in good osseointegration and in good function without any complications. Conclusion : Intraoral distraction osteogenesis can be a good option for alveolar ridge augmentation of the severely atrophied ridges and soft-tissue defects. However, for the better vector control of distracting segments and for anterior esthetics, customized distraction devices could be considered later.

체류시간 및 하수분할유입에 따른 질소 제거효율

이한섭 용인대학교 2007 용인대학교 논문집 Vol.25 No.-

The amount of waste water generated in Korea is constantly an increasing trend in proportion to economic growth, and the conventional activated sludge process is widely being used for general waste water treatment. But the ministry of environment is rapidly strengthening the treatment standards of N and P (less than 20㎎/L of N, 2㎎/L of P from Jan. 1, 2008 in the whole nation) to prevent the eutrophication of lake water, and therefore highly advanced treatment technology is required not only in the existing treatment plants where the activated sludge process is being used, but also in newly constructed treatment plants for the treatment of N and P. This study is aimed at highly operating the engineering technology method was developed by domestic D company to eliminate N at the same time. Experiments were conducted in the G treatment plant located in Y city. The treatment process of the bioreactor was started from the principal equipment for the elimination of N, nitrification and the elimination of organic compounds. And it has an internal recycle piping from the end of the aerobic tank to the anoxic tank and external recycle piping from the final settling basin to the denitrification tank. By experiment of 4 types separate inflow of waste water to the denitrification tank and the anaerobic tank, and changes in staying time at the anoxic tank and the aerobic tank, the elimination of organic compounds in each type and the relationship in the efficiency between the elimination of N were researched.

확산계수에 미치는 용매의 영향

이한섭,강안수,강삼룡 明知大學校 産業技術硏究所 1984 産業技術硏究所論文集 Vol.3 No.-

Diffusion coefficients of dye was increased by adding organic components and electrolytes as solvent to dye-water system. We measured diffusion coefficients by treating the ternary system of dye-solvent-water as a pseudo-binary system of dye-water and solvent. All experiments were made with the diaphragm cell of Whatman 42 filter paper and sintered glass when solvent was organic components and electrolytes respectively. The experimental results showed that diffusion coefficients of dye nearly agreed with the approximate equation related to the solubility of dye. Diffusion coefficients of dye were increased when solubility of dye to the water was larger than that of organic component to the water. There was similar tendency between diffusion coefficients of orange Ⅱ and that of electrolyte when solvents were electrolytes. In order to increase diffusion coefficients of dye, electrolytes were more favorable than organic components as solvent. But in the case of urea as solvent, diffusion coefficients of orange Ⅱ were increased maximum seven times.

테헤란로 高層事務所 建物 저층부의 公共空間에 관한 연구

윤한섭,김성홍 대한건축학회 2003 대한건축학회논문집 Vol.19 No.3

This paper discusses the public space of the high-rise office buildings on Teheranno street. Since the 1980s, there has been a rapid growth in the construction of high-rise buildings due to the development of architectural technology and the increase of land price along this street. The ground level of high-rise office building is the buffer space between private and public realm and its roles in urban space becomes considerable. Nine buildings between Samsung and Kangnam subway station were chosen and classified according to their site areas and their relationships to the adjacent streets. Three aspects were primarily analyzed and interpreted. 1) the ratio of the public space and site area, 2) the programs of the ground level, 3) the spatial accessibility and permeability between buildings and streets. The paper reports that the buildings generally meet the legal requirements, yet their functions as public space were limited, and argues the importance of the linkage between urban and architectural design.

Glutaraldehyde를 이용한 설파제의 합성과 지속성에 관한 연구

이한섭,최성부 용인대학교 자연과학연구소 2007 自然科學硏究所論文誌 Vol.12 No.1

Dual actions are the most recently used delivery system in drug study. Dual-action agents are unique chemical entities comprised of two different type of antibacterial compounds covalently linked together in a single molecule in such a way that both components are able to exert their bactericidal properties. Crosslinked sulfadiazine-sulfanilamide such as antibiotics is synthesized by synthetic handle with glutaraldehyde. As a result, New synthetic antibacterial agent exhibited the broad antibacterial activities against Gram(+) and Gram(-) of 4 strains and a long durability supposing that the stomach and blood.

지방족 C -아민류 추출제에 의한 유기산의 반응 추출

이한섭,강안수,류운형 明知大學校 産業技術硏究所 1995 産業技術硏究所論文集 Vol.14 No.-

The effects of extractant species, concentration, solvent and temperature on the degree of extraction were investigated, and also the effects of concentration of stripping phase and temperature on the degree of re-extraction were investigated in physical and reactive extraction system using equilibrium extraction unit. The used organic acids were acrylic acid, methacrylic acid, pyruvic acid, α-ketoglutaric acid, and the extractants were n-octylamine(OA, primary amine), di-n-octylamine(DOA, secondary amine), tri-n-octylamine(TOA, tertiary amine) and Aliquat 336. (TOMAC, quaternary ammonium salt). N-butylacetate(n-BAc), methyl-isobutyl-ketone(MIBK), chloroform, xylene and kerosene were used as solvents. The effect of the degree of re-extraction was investigated using alkaline solution of NaOH and Na₂CO₃. We found that the degree of extraction for reactive extraction was 2∼9 times than that for physical extraction and that the effect of extractants on the degree of extraction of organic acid was the order of OA>TOMA>DOA>TOA. And the degree of extraction was increased with increasing the concentration of extractants. In solvent effect, solubility parameter was more effective than dielectric constant of solvent, and the degree of extraction increased as the difference of solubility parameter of solvent and solute decreased, therefore the order was kerosene>xylene>chloroform>MIBK>n-BAc. Also, the degree of re-extraction increased with decreasing basicity of stripping phase, therefore, the degree of re-extraction for re-extraction of organic acid was higher in Na₂CO₃solution than in NaOH solution. As a result of the effect of temperature, the degree of extraction was decreased and re-extraction was increased with increasing temperature, respectively.