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갓김치에서 분리한 캡사이신-내성 세균,Leuconostoc mesenteroides GK-10의 생리활성
김유진,나예린,이현호,오계헌 순천향대학교 기초과학연구소 2021 순천향자연과학연구 논문집 Vol.27 No.1.2
The aim of this work was to investigate the physiological activities of capsaicin-resistant bacterium, Leuconostoc mesenteroides GK-10 isolated from fully fermented mustard leaf kimchi. Initially, the morphological, physiological and biochemical characteristics of strain GK-10 were examined. Based on phylogenetic analysis using 16S rRNA sequencing, the isolate was identified as L. mesenteroides GK-10 and phylogenetic tree of the strain was plotted. L. mesenteroides GK-10 grew well in the different concentrations of capsaicin (0-600 μg/mL). Various physiological activities (e.g., tyrosinase inhibitory activity, ACE inhibitory activity, antioxidant activity, SOD-like activity, depletion of sodium nitrite) of L. mesenteroides GK-10 cultures with different concentrations of capsaicin were evaluated and compared to the cultures of L. mesenteroides DK-3 as a standard strain. According to the results, all of the physiological activities evaluated in this work were considerably higher in L. mesenteroides GK-10 cultures with 600 μg/mL capsaicin compared to L. mesenteroides DK-3 cultures with the same capsaicin concentration, although the physiological activities of GK-10 were higher or lower compared to those of DK-3 in the absence of capsaicin. In consequence, this work showed that L. mesenteroides GK-10 strains can maintain their physiological activities despite the presence of high concentrations of capsaicin.
Exploring the Difficulties of Teachers in Martial Arts Education
( Ye Jin Yu ),( Young Sik Kim ) 대한무도학회 2019 대한무도학회 학술대회자료집 Vol.2019 No.2
Purpose: The purpose of this study is to provide basic data for the study of the future activation of martial arts education based on the experiences of teachers. Methods: For this study, four elementary and secondary teachers who had practiced martial arts education were selected as the subject of the study, and a 1:1 in-depth and group interview were conducted. Collected data were analyzed and interpreted using a constant comparison method. Results: Difficulties of teachers in martial arts education were analyzed in three respects. Above all, the difficulties in terms of the curriculum were as follows. First, since the proportion of martial arts-related contents was small which led teachers feel less necessity to educate martial arts than other subjects. Second, the level of martial arts related contents presented in the curriculum or textbook was higher than that of the teacher's teaching ability or the student's level. Third, a large amount of martial arts-related contents were presented in a very limited amount of time, making it difficult to realize them in actual classes. The difficulties in terms of their professionalism were as follows. First, the proportion of martial arts related curriculum was very low in university of education. Second, there were very few opportunities for martial arts training for teachers. Third, there was a lack of professionalism of teachers who can overcome the level difference of students. The difficulties in terms of the institutional and physical environment were as follows. First, there were many limitations to martial arts education due to the lack of infrastructure. Second, it was difficult to secure budgets and athletes in school sports teams, and it was very difficult for athletes to enter college. Third, there was a lack of professional manpower related to martial arts. Conclusion: To overcome these difficulties, first, policy support is needed, such as securing facilities and budget support for the sports clubs. Second, martial arts related education should be strengthened in pre-service teacher education and teacher training. Third, the level and quantity of curriculum should be appropriate to the level of students. Fourth, institutional support such as providing a martial arts-related manpower and broadening the career path of martial arts athletes is needed.
Ye Jin Jeong,Yu Gyeong Jeon,Hee Ju Choi,Eun Jin Baek,Guk Hyun Kim,Yun Jung Yang,Min Jae Kim,Joon Gyu Min,김광일 한국수산과학회 2023 Fisheries and Aquatic Sciences Vol.26 No.7
Cyprinids are popular species for aquaculture worldwide, with Asia being a significant contributor to their production. In Korea, common carp (Cyprinus carpio), koi carp (Cyprinus rubrofuscus), and goldfish (Carassius auratus) are cultivated domestically and imported for ornamental or human consumption purposes. Among the viruses that infect cyprinids, cyprinid herpesvirus-2 (CyHV-2), koi herpesvirus (KHV, also known as cyprinid herpesvirus-3), and carp edema virus (CEV) are of particular concern as they cause substantial economic losses to the aquaculture industry. In this study, we investigated these viruses in both of domestic and imported cyprinids. Our results revealed that CyHV-2 was only detected in imported goldfish from Thailand. To further investigate the genetic characteristics of them, the marker A region was analyzed. Despite belonging to the same cluster with isolates from China, France, Poland, and Israel, CyHV-2 detected in this study showed distinct differences in their repetitive sequence sizes. Furthermore, two different forms of KHV/CEV coinfection were identified from domestic koi carp, both of which exhibited typical symptoms. Phylogenetic analysis showed that one KHV isolate (ScKc-2105-K) was of the Asian type and closely related to isolates from Japan, Indonesia, Belgium, Taiwan, and China. Two CEV isolates (ScKc-2105-CE and GhKc-2207-CE) belonged to the IIa type and showed high similarity with isolates from the USA, France, and Korea. Notably, koi carp injected with cultured KHV (ScKc-2105-K) showed 78.0% cumulative mortality within 14 days post-injection (dpi). Our findings support the importance of regular surveillance of viral diseases in cyprinids.