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JOURNAL OF THE KOREAN ENVIRONMENTAL SCIENCES SOCIETY

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수록정보
수록범위 : 1권1호(1992)~28권2호(2019) |수록논문 수 : 3,290
한국환경과학회지
28권2호(2019년 02월) 수록논문
최근 권호 논문
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KCI등재

1부산지역 오존농도의 시·공간 분포 변화

저자 : 강윤희 ( Yoon-hee Kang ) , 김유근 ( Yoo-keun Kim ) , 황미경 ( Mi-kyeong Hwang ) , 정주희 ( Ju-hee Jeong ) , 김현수 ( Hyunsu Kim ) , 강민성 ( Min-seong Kang )

발행기관 : 한국환경과학회 간행물 : 한국환경과학회지 28권 2호 발행 연도 : 2019 페이지 : pp. 169-182 (14 pages)

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Temporal and spatial variations in surface ozone concentrations in Busan were investigated by using observation data from urban air quality sites during 2001-2016. The annual ozone concentrations showed a significant increasing trend of +0.40 ppb yr-1 in this period, with a more rapid increase of +0.81 ppb yr-1 since 2010. For the monthly analysis, the increase in ozone concentration was the greatest in August (+0.68 ppb yr-1). These ozone trends were due mainly to rising temperature (+0.05℃ yr-1) and weak decreasing precipitation (-6.42 mm yr-1). However, the extreme weather events (heat wave, localized heavy rain, etc.) lead to an increase in short-term variability of ozone since 2010. The relatively low ozone concentrations in the downtown area were caused by high NOx emissions from mobile sources. The increases in ozone concentrations were observed at most of the air quality monitoring sites due to the reductions in anthropogenic emissions of NOx during 2001-2015. However, in the southern coastal area, lower rates of increase in ozone concentrations were observed by -0.10~0.25 ppb yr-1 due to the significant NOx emitted by ships in the Busan port and Busan new port.

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2환경 독성 억제효과를 가진 커큐민 나노스피어가 마우스의 사료 효율 및 악취저감에 미치는 영향

저자 : 박정배 ( Jeong-bae Park ) , 이영민 ( Young-min Lee ) , 박문기 ( Moon-ki Park ) , 민태선 ( Taesun Min ) , 이세중 ( Sei-jung Lee )

발행기관 : 한국환경과학회 간행물 : 한국환경과학회지 28권 2호 발행 연도 : 2019 페이지 : pp. 183-189 (7 pages)

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Curcumin (C21H20O6) is a hydrophobic polyphenol found in turmeric. Although curcumin has been used as a natural medicine, its major limitation is related to poor absorption from the gut. Therefore, we developed a method for preparation of Curcumin Nanospheres (CN) to improve the aqueous-phase solubility of curcumin and investigate the functional role of CN in promoting feed efficiency and odor reduction in mice. CN showed inhibitory effects on actate dehydrogenase (LDH) cytotoxicity induced by ecotoxic substance toluene in gut epithelial HCT116 cells. In addition, the weights of internal organs (liver, heart, kidneys, and spleen) and the levels of serum Glutamate Oxaloacetate Transaminase (GOT), Glutamate Pyruvate Transaminase (GPT), and LDH did not show significant differences between mice administered oral CN for two weeks and compared to the control group. Interestingly, CN not only reduced hydrogen sulfide (H2S) and ammonia (NH3) levels and fecal odor, but also improved feed efficiency in mice. These results demonstrate that oral nano-delivery of anti-ecotoxicological CN is a functional system to deliver curcumin to the gut to improve feed efficiency and reduce fecal odor in mice.

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3생태계보전협력금 반환사업을 통한 해안 식생복원계획 - 부산 해운대구 달맞이 고개 일대를 대상으로 -

저자 : 윤성융 ( Yoon Sung-young )

발행기관 : 한국환경과학회 간행물 : 한국환경과학회지 28권 2호 발행 연도 : 2019 페이지 : pp. 191-201 (11 pages)

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This study suggested a vegetation restoration plan for a coastal area where the ecosystem conservation fund return project, targeting the whole area of Dalmaji-gil, located in Haeundae, Busan. After distinguishing if it would be a proper site for the operation of the ecosystem conservation fund return project by analyzing the ecological environment, human environment, and the current status of land owners, the target species for vegetation restoration was determined, and the facilities and programs were selected in accordance with the spatial division of the biosphere reserve. The basic direction is as follows. First, is the expansion of green space and the securement of life habitats downtown. Second, is the conservation of core areas by separating the conserved area from the space for use. Third, is the establishment of ecological resting space and the reinforcement of an ecological educational programs. The significance of this study is to suggest a vegetation restoration plan of a coastal area, fully utilizing the existing vegetation of the subject area, by suggesting the land use and flow planning, environmental improvement (vegetation restoration) plan, life habitats establishment plan, planting plan, and hydrologic plan, facilities, maintenance, and monitoring plan based on the basic direction. This study would provide useful basic data for ecosystem conservation and restoration in the Korean Peninsula, surrounded by the ocean on three sides.

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Organic wastewater generated from polyester manufacturing processes was selected from H company to investigate the feasibility of anaerobic digestion that produces gases including methane. Bio Methane Potential (BMP) tests were conducted to measure the gas production and methane concentration for 7 process wastewater and 2 kinds of sludges from the H company. Also, along with monitoring pH and alkalinity during the anaerobic digestion process, the concentrations of COD and 1,4-dioxane were measured with 4 different operating conditions for N Emulsion (NE) and Ethylene Glycol (EG) wastewater. The BMP tests showed that 65% of methane was produced from NE and EG wastewater. This suggests that the organic wastewater from H company can be effectively treated by an anaerobic digester by which more than 90% of COD was removed.

KCI등재

5저수지 붕괴함수의 매개변수 결정이 유량과 침수범위에 미치는 영향

저자 : 이길하 ( Lee Khil-ha )

발행기관 : 한국환경과학회 간행물 : 한국환경과학회지 28권 2호 발행 연도 : 2019 페이지 : pp. 211-217 (7 pages)

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A Numerical modeling approach is usually applied to reproduce the physical phenomena of a fill dam-break. The accuracy of the dam-break model depends on the physical structure that defines input variables such as the storage volume, breach formation and progress, and the parameters of the model, which are subjective as they are prescribed by users. In this study, a sensitivity analysis was performed for the nonlinear breach progression curve that was already developed, which includes four parameters. The study focuses on the two of the parameters which control the breach forming time and peak discharge. The model is coupled with a two-dimensional flood simulation model (FLO-2D) to examine flood coverage and depth. It is generally observed that the parameter β controls only the breach forming time, the parameter γ is particularly sensitive to the peak flow.

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6식물-미생물전기화학 기반의 미활용 에너지 회수 기초 연구

저자 : 유재철 ( Jaecheul Yu ) , 신춘환 ( Choon Hwan Shin )

발행기관 : 한국환경과학회 간행물 : 한국환경과학회지 28권 2호 발행 연도 : 2019 페이지 : pp. 219-224 (6 pages)

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In this study, we evaluated the energy production from plant-microbial fuel cells using representative indoor plants, such as Scindapsus aureus and Clatha minor. The maximum power density of microbial fuel cell (MFC) using S. aureus (3.36 mW/㎡) was about 2 times higher than that of the MFC using C. minor (1.43 mW/㎡). It was confirmed that energy recovery is possible using plant-MFCs without fuel. However, further research is needed to improve the performance of plant-MFCs. Nevertheless, plant-MFCs have proved their potential as a novel energy source to overcome the limitations of the conventional renewable energy sources such as wind power and solar cells, and could be employed to a power source for the sensor in charge of the fourth industrial revolution.

KCI등재

7천연물 성분을 이용한 환경 유해미생물의 biofilm 생성 저해능 비교에 관한 연구

저자 : 강은진 ( Eun-jin Kang ) , 박지헌 ( Ji Hun Park ) , 진슬 ( Seul Jin ) , 김영록 ( Young-rok Kim ) , 도형기 ( Hyung-ki Do ) , 양웅석 ( Woong-suk Yang ) , 이재용 ( Jae-yong Lee ) , 황철원 ( Cher-won Hwang )

발행기관 : 한국환경과학회 간행물 : 한국환경과학회지 28권 2호 발행 연도 : 2019 페이지 : pp. 225-233 (9 pages)

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In this study, we investigated the in vitro anti-biofilm activities of plant extracts of chives (Allium tuberosum), garlic (Allium sativum), and radish (Raphanus sativus L.) against environment harmful bacteria (gram-positive Staphylococcus aureus and, gram-negative Salmonella typhimurium and Escherichia coli O157:H7). In the paper disc assay, garlic extracts exhibited the highest anti-biofilm activity. The Minimal Inhibitory Concentration (MIC) of all plant extracts was generally higher for gram-negative bacteria than it was for gram-positive bacteria. Gram-negative bacteria were more resistant to plant extracts. The tetrazolium dye (XTT) assay revealed that, each plant extract exhibited a different anti-biofilm activity at the MIC value depending on the pathogen involved. Among the plant extracts tested, garlic extracts (fresh juice and powder) effectively reduced the metabolic activity of the cells of food-poisoning bacteria in biofilms. These anti-biofilm activities were consistent with the results obtained through light microscopic observation. Though the garlic extract reduced biofilm formation for all pathogens tested, to elucidate whether this reduction was due to antimicrobial effects or anti-biofilm effects, we counted the colony forming units of pathogens in the presence of the garlic extract and a control antimicrobial drug. The garlic extract inhibited the E. coli O157:H7 biofilm effectively compared to the control antimicrobial drug ciprofloxacin; however, it did not inhibit S. aureus biofilm significantly compared to ciprofloxacin. In conclusion, garlic extracts could be used as natural food preservatives to prevent the growth of foodborne pathogens and elongater the shelf life of processed foods.

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8도심 하천 복원에 따른 주변지역 열환경 변화 특성 분석

저자 : 도우곤 ( Woo-gon Do ) , 정우식 ( Woo-sik Jung )

발행기관 : 한국환경과학회 간행물 : 한국환경과학회지 28권 2호 발행 연도 : 2019 페이지 : pp. 235-248 (14 pages)

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The purpose of this study is to quantitatively analyze the effects of a restoration project on the decrease in the temperature in the surrounding areas. The thermal environment characteristics of the investigation area were analyzed using the meteorological data from the Busanjin Automatic Weather System which is closest to the target area. The terrain data of the modeling domain was constructed using a digital map and the urban spatial information data, and the numerical simulation of the meteorological changes before and after the restoration of the stream was performed using the Envi-met model. The average temperature of the target area in 2016 was 15.2℃ and was higher than that of the suburbs. The monthly mean temperature difference was the highest at 1.1℃ in November and the lowest in June, indicating that the temperatures in the urban areas were high in spring and winter. From the Envi-met modeling results, reductions in temperature due to stream restoration were up to 1.7℃ in winter, and decreased to 3.5℃ in summer. The effect of temperature reduction was seen in the entire region where streams are being restored.

KCI등재

9소장상피세포에 있어서 느릅나무 당단백질이 톨루엔에 의해 유도된 환경독성 기작에 미치는 효과

저자 : 김도완 ( Do-wan Kim ) , 김지윤 ( Ji-yun Kim ) , 박문기 ( Moon-ki Park ) , 이세중 ( Sei-jung Lee )

발행기관 : 한국환경과학회 간행물 : 한국환경과학회지 28권 2호 발행 연도 : 2019 페이지 : pp. 249-257 (9 pages)

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Ulmus davidiana Nakai (UDN) has been traditionally used as a herbal medicine to treat inflammatory diseases in Korea. In the present study, we investigated the anti-ecotoxic potential of a 116 kDa glycoprotein isolated from UDN (UDN glycoprotein) in human intestinal epithelial INT-407 cells. We demonstrated that UDN glycoprotein (20 μg/mL) could inhibit the production of lactate dehydrogenase (LDH) induced by toluene, an ecotoxic substance. Additionally, we found that the toluene-induced intestinal cytotoxicity was mediated by the phosphorylation of p38 Mitogen-Activated Protein Kinase (MAPK) via the production of intracellular Reactive Oxygen Species (ROS). The UDN glycoprotein significantly decreased the levels of ROS production and p38 MAPK activation in toluene-stimulated INT-407 cells. Moreover, the UDN glycoprotein inhibits the phosphorylation of nuclear factor-kappa B (NF-κB), which is responsible for the production of LDH, in toluene-stimulated INT-407 cells. Collectively, our data indicate that UDN glycoprotein is a natural antioxidant and a modulator of ecotoxicity signaling pathways in human intestinal epithelial cells.

KCI등재

10용담댐 유역에서 식생 이질성이 FLO-2D 유량 산정에 미치는 영향

저자 : 송호준 ( Hojun Song ) , 이길하 ( Khil-ha Lee )

발행기관 : 한국환경과학회 간행물 : 한국환경과학회지 28권 2호 발행 연도 : 2019 페이지 : pp. 259-266 (8 pages)

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Two main sources of data, meteorological data and land surface characteristics, are essential to effectively run a distributed rainfall-runoff model. The specification and averaging of the land surface characteristics in a suitable way is crucial to obtaining accurate runoff output. Recent advances in remote sensing techniques are often being used to derive better representations of these land surface characteristics. Due to the mismatch in scale between digital land cover maps and numerical grid sizes, issues related to upscaling or downscaling occur regularly. A specific method is typically selected to average and represent the land surface characteristics. This paper examines the amount of flooding by applying the FLO-2D routing model, where vegetation heterogeneity is manipulated using the Manning's roughness coefficient. Three different upscaling methods, arithmetic, dominant, and aggregation, were tested. To investigate further, the rainfall-runoff model with FLO-2D was facilitated in Yongdam catchment and heavy rainfall events during wet season were selected. The results show aggregation method provides better results, in terms of the amount of peak flow and the relative time taken to achieve it. These rwsults suggest that the aggregation method, which is a reasonably realistic description of area-averaged vegetation nature and characteristics, is more likely to occur in reality.

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1연안해역에서 석유오염물질의 세균학적 분해에 관한 연구

(2006)홍길동 외 1명심리학41회 피인용

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