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Choo, Sung-Woo;Cho, Hwan-Kyu
- Proceedings of the Korean Information Science Society Conference
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- 2005.07b
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- pp.268-270
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- 2005
본 논문의 목적은, 간단한 DNA를 기반으로 서로 상호 작용하는 인공미생물체를 위한 진화생태계를 구성하는 것이다. 여기서, 강화 신호를 사용한 신경 회로망의 학습을 통해 인공미생물체의 지능 린 진화과정을 모방해서 자신의 DNA 및 주변 환경에 따라 행동 패턴이 변화하도록 하였다. 또한, 미생물의 진화론적 관점에서 생식 과정에서 두 개체산의 유전자 교환 등이 일어날 수 있도록 하였다. 그리고 이렇게 만들어진 진화생태계의 응용 가능성에 대해 다룬다.
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Okano, Seigo;Kwon, Jang-Sik;Suh, Jang-Sun;Arao, Tomohito
- Korean Journal of Soil Science and Fertilizer
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- v.32 no.1
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- pp.84-89
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- 1999
A simple cultivation method using Jew's mallow (Corchorus olitorius L.) was examined to evaluate the biological quality of 72 upland soils collected from greenhouses in Korea. Each soil was mixed with 4-fold volume of sterilized basal soil having no indigenous chemical and physical problems to lessen the chemical and physical variations among original sample soils. This study assumes that the biological characteristics of each mixture 2 weeks after treatment reflect those of individual sample soil prior to treatment. Jew's mallow (Corchorus olitorius L.) was cultivated for 4 weeks in a pot filled with 250g of each experimental soil and the biological quality of each soil was estimated by the aboveground plant growth. The results indicated that microbial floral quality was explicitly deteriorated in 18 soils having EC above or equal to $5dS\;m^{-1}$. However, in soils having EC below $5dS\;m^{-1}$, some showed a sign of deterioration, while others did not. As this simple method is a kind of bioassay, it dose not require the measurements of microbial numbers and activities.
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Kim, Hong-Lim;Weon, Hang-Yeon;Sohn, Bo-Kyun;Choi, Young-Hah;Kwack, Young-Bum
- Korean Journal of Soil Science and Fertilizer
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- v.42 no.5
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- pp.341-347
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- 2009
Soil microbial community has been changed after the treatment of anaerobic fermentation using wheat bran or rice bran was applied to the soil. In the dilution plate technique, the number of anaerobic bacteria and fungi was higher in rice bran-treated soil than in non and wheat bran-treated soil, but of yeast was higher in wheat bran-treated soil than in non and rice bran-treated soil. Specially, the fungi were not detected in the wheat bran-treated soil. Identified by 16S rDNA sequencing, the number of aerobic bacteria was similar in all treatments, the dominant bacteria was the genus Bacillus. In the phospholipid fatty acid (PLFA) technique, both Gram-positive and Gram-negative bacteria change slightly in all treatments for 20 days of fermentation process but, after 20day, increased rapidly in wheat or rice bran-treated soil. In conclusion, the microbial communities structure was dramatically changed after the treatment of wheat or rice bran to soil.
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