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클로로필 고생산성 Chlorella vulgaris 변이주의 특성 분석
박현진 ( Hyunjin Park ),김옥주 ( Okju Kim ),하지민 ( Jimin Ha ),최태오 ( Taeo Choi ),이재화 ( Jaehwa Lee ) 한국미생물생명공학회(구 한국산업미생물학회) 2015 한국미생물·생명공학회지 Vol.43 No.3
Micro-algae are unicellular photosynthetic organisms and produce pigments such as chlorophyll and carotenoid. Chlorella containsa lot of protein and functional components like lipids, chlorophyll and carotenoids. In this study we induced mutants of Chlorella vulgaris (C. vulgaris) through ultraviolet radiation (UV-B) and selected two mutants by pigment (chlorophyll and carotenoids) content. We named the mutants ‘UBM1-2’, ‘UBM2-57’ and they were cultivated for 21-days. Cell growth, dry cell weight, protein content, lipid and pigments content were measured. The results indicated that the mutants displayed slower cell growth, lower dry cell weight and protein content than the wild type. However, for UBM1-2 the lipid content was 21% higher than the wild type. In addition, the mutants’ chlorophyll content was 37% and 89% higher than the wild type and the carotenoids content was 27% and 70% higher than the wild type, respectively.
소방공무원 대상 캠프 프로그램의 스트레스 완화 효과 추적 및 관련 요인 탐색
신정하(Jungha Shin),심민영(Minyoung Sim),이정현(Junghyun H. Lee),이다영(Da Young Lee),전경선(Kyungsun Jeon),오승아(Seunga Oh),김지애(Jiae Kim),김옥주(Okju Kim),양정일(Jungil Yang),이희봉(Heebong Lee) 대한스트레스학회 2018 스트레스硏究 Vol.26 No.2
본 연구의 목적은 캠프 프로그램에 참가한 소방공무원의 스트레스, 우울, 외상후 스트레스의 변화를 전향적으로 조사하여 캠프 프로그램의 효과를 검증하고, 스트레스 완화와 관련된 요인을 분석하는 것이다. 이를 위해 총 5회에 걸쳐 지각된 스트레스(PSS-K), 영역별 스트레스(GARS), 외상후 스트레스 증상(IES-R) 및 우울감(BDI-II)의 변화를 시간 경과에 따라 분석하고, 캠프 후 6개월 시점의 스트레스에 영향을 미치는 요인을 조사하였다. 연구결과 스트레스 수준은 캠프 참여 전보다 낮아져 캠프 후 6개월까지 지속되었으나, 우울감은 캠프 직후에만 감소를 보였다. 캠프 참여 전 직장 스트레스가 높고 질병 스트레스가 낮을수록 캠프 프로그램을 통한 스트레스 완화 효과가 큰 것으로 나타났다. Background: This study aims to test the effectiveness of a camp program and to analyze the factors related to stress relief. To this end, the present study conducted prospective research for six months on the change of stress, depression, and the level of post-traumatic stress among the firefighters who participated in the camp program. Methods: The perceived stress (PSS-K), stress by the different portion (GARS), post-traumatic stress symptoms (IES-R) and depression (BDI-II) were evaluated at five sessions over the span of six months, and the change of each measure was analyzed. Those five sessions were before the camp, right after the camp and a month, three months and six months after the camp. Moreover, this study assessed characteristics of sociodemographic, firefighting task and mental health that are related to the level of stress at six months after the camp. Results: Compared with before the camp, the level of depression was significantly lower right after the camp. However, the level did not have significant difference after a month period. At one month after the camp, the level of stress was significantly lower than before the camp, and was maintained after six months. The predictive factors of the degree of stress relief after the camp were high job stress and low disease stress. Conclusions: This study has found that the stress relief from the camp continued until six months after the camp, and the stress-relieving effect through the camp was substantial for those with higher job stress and lower disease stress.