• Korean Journal of Environmental Biology
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• v.24 no.1 s.61
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• pp.38-45
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• 2006

Ecological characteristics of microbial populations inhabiting heavy metal polluted soil were investigated. The samples were collected from 293 sites around an factory and industry at Gyeoungsangbuk-do. We measured the contents of seven heavy metal elements (Cd, Cu, As, Hg, Pb, $Cr^{6+}$, CN), seven sites have been seriously contaminated by mercury and chrome. A quantitative evaluation of microbial populations in mercury and chrome contaminated soil was examined by using plate count method. Bacterial numbers in polluted soil samples ranged from $7.4X10^5\;to\;9.3X10^7\;cfu\;g^{-1}$, about $10\sim100$ fold less than the count for the unpolluted soil. Moulds were not detected in chrome polluted soil. The log values of actinomycetes of each contaminated soil samples were log ranged from 6.18 to 7.52. The ratio of actinomycetes was similar to unpolluted soil. The investigation showed actinomycetes to be the major microbial population inhabiting the mercury and chrome polluted soil. Thirty-one isolates among the total isolates were examined for antibacterial activity. These isolates were identified based on a phylogenetic analysis using 16S rRNA gene nucleotide sequences, they were categorized in three major phylogenetic groups, belong to the Streptomyces (6 strains), Saccharopolyspora (3 strains), Nocardiodes (1 strain). On the phylogenetic tree, the clade consisting of five isolates were distantly related to all of the established Streptomycetes genera, indicating the possibility as members of new species.

• Korean Journal of Environmental Biology
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• v.20 no.4
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• pp.360-365
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• 2002

The variety and density of entomopathogenic nematodes from the polluted soils of heavy metals were examined. In order to investigate the pollution of heavy metals in soil, 300 sites in kyungsangbuk-do were collected from March to October in 2001. We measured the contents of seven heavy metal elements (Cd, Cu, As, Hg, Pb, Cr^{6+}$, CN) and than cheesed soil of 25 sites with high concentration of heavy metals. The seven strains of nematodes were isolated from seven samples by silkworm host (Bombyx mori mori) and white trap. Isolated nematodes are composed of two families, one order. The members of Rhabditida were isolated in the soil with mean Cd content of 0.870 ppm. And they were isolated in the soil samples with As content less than 0.745 ppm. However they were isolated regardless of concentration of Cu and Pb. The members of Cylindrocorpidae were isolated in the soil samples with Cr^{6+}$ content less than 0.05 ppm. Any entomopathogenic nematode was not detected in the CN polluted soil. Isolated nematodes successfully cultured on the silkworm host and were confirmed the pathogenicity, multiplicity, and tolerance against various condition of preservation. Which proved its potential usefulness as biological agent.

• Proceedings of the Membrane Society of Korea Conference
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• 2003.05a
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• pp.121-124
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• 2003

• Agrochemical news magazine
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• v.20 no.2 s.149
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• pp.48-51
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• 1999

• Proceedings of the Korean Society of Soil and Groundwater Environment Conference
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• 1996.04a
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• pp.101-105
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• 1996

• The Science & Technology
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• no.3 s.406
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• pp.62-67
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• 2003

갯벌은 다양한 생물이 살아가는 소중한 공간이며 동시에 사람들에게는 오염물질을 정화시켜주는 '자연의 정화조' 역할을 하는 곳이다. 또한 갯벌은 '단백질의 공급창고'로 불릴 만한 영양과 높은 음식재료를 충실히 제공하는 곳이다.

• Proceedings of the Korean Society of Soil and Groundwater Environment Conference
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• 2000.11a
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• pp.314-314
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• 2000

• Proceedings of the Membrane Society of Korea Conference
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• 2002.11a
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• pp.158-161
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• 2002

• The Microorganisms and Industry
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• v.14 no.3
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• pp.21-22
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• 1988

미생물의 서식처는 크게 나누어 대기, 토양, 수중생물체 등으로 생각할 수 있으나 대다수가 존재하는 토양중의 미생물과 수중의 미생물이 산업활동에서 배출되는 오염물이 미치는 영향관계를 살펴본다.

• Proceedings of the Korea Society of Environmental Toocicology Conference
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• 2002.05a
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• pp.39-40
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• 2002