• 보존과학회지
• /
• 제27권2호
• /
• pp.231-241
• /
• 2011

박물관에서 질소나 아르곤과 같은 불활성 가스를 사용한 저산소 농도 살충처리법은 메틸브로마이드나 유독성 살충제의 대체법으로써 성공적으로 사용되어 왔다. 저산소 농도 살충법의 살충 효과는 해충의 종, 산소 농도, 온도, 습도, 가스의 종류 등에 따라 영향을 받으며, 박물관에서의 문화재 보존 환경(온도 $15{\sim}25^{\circ}C$, 습도 40~60%)에서 산소 농도를 0.03% 이하로 유지함으로써 1개월 이내에 가장 내성이 강한 문화재 해충의 살충이 가능하다. 그리고 살충 처리 대상 문화재의 수량이나 크기에 따라 소형 중형 백, 대형 텐트, 버블, 챔버 등 다양한 시스템을 적용할 수 있다.

• Journal of Forest and Environmental Science
• /
• 제34권5호
• /
• pp.395-404
• /
• 2018

Since the mass mortality of Quercus mongolica has been first reported in Gyeonggi province at 2004, the disease spread rapidly over Korean peninsula annually. Ambrosia beetle (Platypus koryoensis) was known as the insect vector of oak wilt fungus, Raffaelea quercus-mongolicae, and control methods of the disease had mainly been focused on eradication of insect vector. However, for the efficient management of the disease, combined control methods for both of the pathogenic fungus and insect vector are strongly required. As one of the efforts to suppress the pathogenic fungus, antifungal activities of Streptomyces isolated from oak forest soil were assayed in this study. Optimum culture condition for the selected isolates was also studied, As a result, Streptomyces blastmyceticus cultured in PDB (Potato Dextrose Broth) at $25^{\circ}C$ for 1 week showed the strongest antifungal activity against oak wilt fungus. Mycelial growth inhibition rates (MGIRs) of Streptomyces isolates were compared on culture media supplemented with heated and unheated culture filtrates of S. blastmyceticus. MGIRs on culture media with unheated culture filtrates were generally higher than those on culture media with heated culture filtrates. Antagonistic mechanism to get involved in the inhibition of hyphal growth and spore formation of the pathogen is due to the antifungal metabolites produced by Streptomyces. This study will provide the fundamental information in developing biocontrol agents for the environment-friendly management of oak wilt disease.

• Current Research on Agriculture and Life Sciences
• /
• 제31권1호
• /
• pp.1-10
• /
• 2013

The exposure of food to ionizing radiation has been recognized as a safe and effective mode of food preservation in more than 55 countries. The benefits include eradication of insect pests, inactivation of food pathogens, extension of shelf-life, and improvement in food hygiene. Regulatory authorities around the world have emphasized the implementation of various national and international regulations to facilitate trade and development of consumers' confidence in purchasing irradiated foods. Therefore, the need for reliable irradiation detection methods has increased to enforce these regulations. At present, a number of promising analytical approaches have been developed and evaluated. Moreover, about 10 European Standards have been adopted as General CODEX Alimentarius methods for the detection of irradiated foodstuffs. However, most of these methods demand relatively expensive equipment and prolonged sample preparation. Therefore, simple and cost-effective approaches would be advantageous for rapid screening of foodstuffs. The suspected samples need to be analyzed further with more validated techniques to confirm the screening results. In this review, existing screening methods (i.e. physical, chemical, and biological) for the identification of irradiated foods have been outlined along with their principles, scopes and limitations.