• Korean Journal of Environmental Biology
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• v.36 no.4
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• pp.659-664
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• 2018

In this study, two essential oils (EOs) extracted from Aleriana fauriei and Alpinia galangal were formulated as an emulsifiable concentrate (EC) and a granule. In the evaluation of their acute toxicity on fishes, Cyprinus carpio adults were used and the toxicities were determined in a static condition. The formulations were prepared from the essential oil extracted by three different methods namely steam distillation (SD), solvent extraction (SE) and supercritical fluid extraction (SFE). The acute toxicities were calculated using $LC_{50}$ values. Among EOs, only the EO extracted by solvent showed acute toxicities on carps. Some of the EC, EOs of Aleriana fauriei did not exhibit toxicity, while EOs from Alpinia galangal showed potent acute toxicities on carps. Among the granules, granules formulated with Aleriana fauriei EO extracted by SD method and Alpinia galangal EO extracted by SFE method showed acute toxicities on fishes. Nevertheless, $LC_{50}$ of ECs and granules formulated with all types of EOs in this study was higher than the fish toxicity level III for pesticides suggested by Korea Rural Development Administration. Furthermore, cytochrome P450 1A and glutathione S-transferase were confirmed as biomarkers in carps in response to the exposure to Alpinia galangal EO extracted by SD and SFE method, tracking Alpinia galangal EO in the aquatic environment.

• Proceedings of the Korean Society of Applied Entomolohy Conference
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• 2004.05a
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• pp.91-91
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• 2004

• Proceedings of the Korean Society of Applied Entomolohy Conference
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• 2001.11a
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• pp.103-103
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• 2001

• Proceedings of the Korea Society of Information Technology Applications Conference
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• 2003.06a
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• pp.75-75
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• 2003

• Journal of the Korean Applied Science and Technology
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• v.7 no.2
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• pp.91-100
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• 1990

• 전기의세계
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• v.31 no.7
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• pp.501-504
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• 1982

이 기술강좌를 통해서 규모가 적지않은 디지탈시스템에 적합한 체계적 설계방법을 설명하며 또 microprocessor 구조와 이것을 응용하는 디지탈 시스템설계를 공부한다. 이 첫 강좌에서는 체계적 설계방법의 네부분인 구조정의, 기계조직, 제어부분, 데이타부분을 소개한다. 이방법을 응용해서 calculator 설계를 시작한다.

• Proceedings of the Korean Society of Applied Entomolohy Conference
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• 2002.05a
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• pp.118-118
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• 2002

• Journal of the KSME
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• v.55 no.12
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• pp.45-48
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• 2015

이 글에서는 금속나노물질(나노와이어, 나노입자)의 액상합성법(wet chemistry)과 합성된 금속나노물질을 이용한 유연전기소자 개발의 응용에 대해 소개하고자 한다.

• Proceedings of the Korea Society of Information Technology Applications Conference
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• 2004.06a
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• pp.63-63
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• 2004

• The Optical Journal
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• s.128
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• pp.66-69
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• 2010

황금비율은 가장 조화롭고 균형 잡힌 아름다움을 만들어내는 비율로서 회화나 사진 같은 시각예술분야에서 사용되고 있다. 이번호에서는 가장 기본적인 황금분할 법칙과 이를 응용한 삼분할법, 여백과 공간 등을 활용한 안정적인 구도를 잡는 법에 대해 알아보자.