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김길하,김완섭,Gil-Ha Kim,Natsag Lkhagvasuren,Batchimeg Namshir,Woan Sub Kim 한국낙농식품응용생물학회 2023 Journal of Dairy Science and Biotechnology (JMSB) Vol.41 No.3
In this study, we isolated lactic acid bacteria from Allium wakegi and examined the usability of culture supernatants obtained from these lactic acid bacteria. The antibacterial activity of the culture supernatant obtained from the isolated lactic acid bacteria against the pathogens Escherichia and Salmonella spp. was measured. The obtained lactic acid bacteria culture medium showed significant antibacterial activity against pathogenic bacteria in a dose-dependent manner. The effects of pH and heat denaturation on the observed anti-pathogenic bacterial activity was also investigated. Adjusting the culture supernatant to pH 7 resulted in loss of all antibacterial activity against pathogenic bacteria, suggesting that the antibacterial activity of the obtained culture supernatant against pathogenic bacteria is influenced by organic acids. Assessment of the heat stability of the anti-pathogenic bacterial activity revealed that heat treatment did not diminish activity. The obtained lactic acid bacteria culture medium is thus stable against heat.
정진교,서보윤,조점래,권윤희,김길하,Jung, Jin-Kyo,Seo, Bo-Yoon,Cho, Jum-Rae,Kwon, Yun-Hee,Kim, Gil-Ha 한국응용곤충학회 2009 한국응용곤충학회지 Vol.48 No.1
팥포장에서 꽃과 꼬투리, 줄기에 피해를 입히는 나비목 곤충들로 콩명나방(명나방과), 팥나방(잎말이나방과), Ostrinia spp. (명나방과) 3종이 주 해충으로 발견되었는데, 포장 안의 거의 모든 식물체가 세 종 중 적어도 한 종 이상에 의해 가해를 받은 흔적이 있었으며, 꽃과 꼬투리의 $15{\sim}60%$ 정도가 피해를 받았다. 또 개화되지 않은 화서가 생식생장기 동안 계속 출현하는 현상이 나타났다. 미개화 화서의 지속적 출현은 꽃 피해에 의한 보상작용에 의한 것으로 추정되었다. 전체 관찰기간을 통해 콩명나방 유충의 평균밀도가 가장 높았는데, 시기적으로는 팥 생식생장기 중기까지 콩명나방이 우점하였으나 후기에는 Ostrinia spp.가 우점하였다. 콩명나방 유충은 1령부터 5령까지 모든 영기가 관찰되었고, 팥나방은 3령기 이후의 유충 영기들이 관찰되었다. 두 해충 모두 개화기에는 꽃과 줄기에서 주로 관찰되었고 개화기 이후에는 꼬투리에서 더 많이 관찰되었다. Ostrinia spp. 유충은 3령기 이후 영기들이 개화기가 지난 다음부터 관찰되었는데 꼬투리와 줄기에서 발견되었다. Three lepidopteran insect pests of the legume pod borer, Maruca vitrata (Lepidoptera: Pyralidae), the soybean pod worm, Matsumuraeses phaseoli (Lepidoptera: Tortricidae) and an Ostrinia spp. (Lepidoptera: Pyralidae) attacking adzuki bean, Vigna angularis, were confirmed as the major insect pests during the reproductive developmental stage of adzuki bean, and M. vitrata existed dominantly. Almost all plants in the adzuki bean field were injured by at least one of the three species, and $15{\sim}60%$ of reproductive organs were injured. Unbloomed inflorescence occurred continuously through the reproductive stage of adzuki bean. While the flower was many at the early stage and its number soon decreased, the pod was few at the early stage, but its number increased soon and maintained at a constant level. The results suggested that the adzuki bean injured by insect pests compensate the flower loss by developing new inflorescence, but the compensation do not cause the development of new pods. While M. vitrata and M. phaseoli were observed in flowers, pods and stem mainly during the first half of reproductive stage of adzuki bean, Ostrinia spp. was observed only in pods and stem during the second half. In addition, while all instars of larvae of M. vitrata were observed, larvae between the third and fifth instars for M. pahseoli and Ostrinia spp. were observed.