• 제목/요약/키워드: Environmental Studies

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Selection of Particulate Matter Observation Measurement Sites in Urban Forest Using Wind Analysis (바람장 분석을 통한 도시숲 미세먼지 관측 장비 설치 지점 선정)

  • Lee, Ahreum;Jeong, Su-Jong;Park, Chan-Ryul;Park, Hoonyoung;Yoon, Jongmin;Son, Junghoon;Bae, Yeon
    • Atmosphere
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    • v.29 no.5
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    • pp.689-698
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    • 2019

  • Air pollution in urban areas has become a serious problem in the recent years. Especially, high concentrations of particulate matter (PM) cause negative effects on human health. Several studies suggest urban forest as a tool for improving air quality because of the capability of forests in reducing PM concentrations through deposition and adsorption using leaf area. For this reason, the National Institute of Forest Science plans to install in-situ observation stations for PM and biogenic volatile organic compounds (BVOCs) on a national scale to verify the net effect of forests on urban air pollution. To measure the quantitative change of PM concentrations due to the urban forest, stations should be located within and outside the forest area with respect to atmospheric circulation. In this study, we analyze the wind direction at the potential measurement sites to assess suitable locations for detecting the effect of urban forests on air quality in five cities (i.e. Gwangju, Daegu, Busan, Incheon, and Ilsan). This technical note suggests effective locations of in-situ measurements by considering main wind direction in the five cities of this study. A measurement station network created in the future based on the selected locations will allow quantitative measurements of PM concentration and BVOCs emitted from the urban forest and help provide a comprehensive understanding of the forest capabilities of reducing air pollution.

  • https://doi.org/10.14191/Atmos.2019.29.5.689 인용 PDF KSCI

Microscopic Overestimation of Heterotrophic Bacteria in Open Waters of China Seas

  • Jiao, Nian-Zhi;Yang, Yan-Hui;Koshikawa, Hiroshi;Harada, Shigeki;Watanabe, Masataka
    • Journal of Microbiology and Biotechnology
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    • v.11 no.5
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    • pp.899-901
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    • 2001

  • Comparison of the abundances of heterotrophic bacteria in the East and South China Seas by stanctard epifluorescence was miscounted as heterotrophic bacteria in DAPI stained samples. This could result in 5-31% oversestimations of heterotrophic bacterial abundance in the study areas.

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Plant growth promoting rhizobacteria that decrease chromium toxicity in Brassica juncea

  • M. Rajkumar;Lee, Kui-Jae;Park, Jun-Sik;Park, In-Suk;Lee, Wang-Hui
    • Proceedings of the Plant Resources Society of Korea Conference
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    • 2003.10b
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    • pp.45-45
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    • 2003

  • The aim of the present study was to assess the importance of siderophore producing rhizobacteria on the growth of Brassica juncea under chromium stress. Pseudomonas sp. (A4) produced an iron chelating substance siderophores in iron deficient medium. Under chromium stress condition Pseudomonassp. (A4) markedly increased the root and shoot length and also biomass of Brassica juncea as compared to Pseudomonas sp. (A3). This plantgrowth promotion has been related to the microbial production of siderophore.

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