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박지은,정연재,박준범,김혜영,유영현,이광식,양원태,김도훈,김종민 한국발생생물학회 2019 발생과 생식 Vol.23 No.3
Type 2 diabetes mellitus (T2DM) is characterized by insulin resistance (IR). T2DM is correlated with obesity and most T2DM medications have been developed for enhancing insulin sensitivity. Silk protein fibroin (SPF) from spiders has been suggested as an attractive biomaterial for medical purposes. We generated transgenic rice (TR) expressing SPF and fed it to diabetic BKS.Cg-m+/+Leprdb mice to monitor the changes in blood glucose levels and adipose tissue proteins associated with energy metabolism and insulin signaling. In the present study, the adipocyte size in abdominal fat in TR-SPF-fed mice was remarkably smaller than that of the control. Whereas the adenosine monophosphate-activated protein kinase (AMPK)-activated protein kinase and insulin receptor substrate 1 (IRS1) protein levels were increased in abdominal adipose tissues after TR-SPF feeding, levels of six-transmembrane protein of prostate 2 (STAMP2) proteins decreased. Phosphorylation of AMPK at threonine 172 and IRS1 at serine 307 and tyrosine 632 were both increased in adipose tissues from TR-SPFfed mice. Increased expression and phosphorylation of IRS1 at both serine 307 and tyrosine 632 in adipose tissues indicated that adipocytes obtained from abdominal fat in TR-SPF-fed mice were more susceptible to insulin signaling than that of the control. STAMP2 protein levels decreased in adipose tissues from TR-SPF-fed mice, indicating that STAMP2 proteins were reducing adipocytes that were undergoing lipolysis. Taken together, this study showed that TR-SPF was effective in reducing blood glucose levels in diabetic mice and that concurrent lipolysis in abdominal adipocytes was associated with alterations of AMPK, IRS1, and STAMP2. Increased IRS1 expression and its phosphorylation by TR-SFP were considered to be particularly important in the induction of lipolysis in adipocytes, as well as in reducing blood glucose levels in this animal model.
李鎭局,徐相壽,朴魯峰,李忠鎬,劉鍾哲,金洪奎,趙武濟,韓運東,池平植 충주대 2003 産業科學論文集 Vol.11 No.-
In this paper, we discuss actual conditions for running school of electrical and electronic engineering in domestic universities. Also, we catch hold of industrial circles's demands in electrical engineering education and analyze questionary results according to goes into effect school of electrical and electronic & information engineering in major of electrical and electronec engineering's students. Conclusively, we present suitable model in electrical engineering by correction of problems.
이평호 ( Pyeong Ho Lee ),백지현 ( Ji Hyeon Baek ),구연종 ( Yeonjong Koo ) 한국환경농학회 2023 한국환경농학회지 Vol.42 No.4
This study focused on nitrous oxide, a major greenhouse gas produced in agricultural settings through bacterial nitrogen oxidation in aerobic soil. Nitrogen fertilizer in farmland is identified as a primary source of nitrous oxide. The importance of reducing excess nitrogen in soil to mitigate nitrous oxide production is well-known. The study investigated the use of liquefied pig manure as an alternative to urea fertilizer in conventional agriculture. Results showed a more than two-fold reduction in nitrous oxide emissions in pepper cultivation areas with liquefied pig manure compared to that with urea fertilizer. The population of Nitrosospira, a nitrous oxide-producing bacterium, decreased by over 10% with liquefied pig manure. Additionally, nirK and nosZ, which are related to the denitrification process, significantly increased in the urea fertilizer group, whereas levels in the liquefied pig manure group resembled those with no nitrogen treatment. In conclusion, the experiment confirmed that liquefied pig manure can serve as an eco-friendly nitrogen fertilizer, significantly reducing nitrous oxide production, a major contributor to the atmospheric greenhouse effect.
영동지역 봄철 소나무림에서 강우후 지표연료 직경별 연료습도변화 예측모델 개발 및 검증
이시영(Lee, Si-Young),이명욱(Lee, Myung-Woog),권춘근(Kwon, Chun-Geun),염찬호(Yeom, Chan-Ho),이해평(Lee, Hae-Pyeong) 한국화재소방학회 2008 한국화재소방학회 학술대회 논문집 Vol.2008 No.추계
In this study, we developed a fuel moisture variation prediction model on each day after precipitation during a spring forest fire exhibition period. For this research, we selected plots in pine forest on Sam-Chuck si and Dong-hae si in Kangwon do according to a forest density(low, mediate, high) and classified a surface woody fuel by a diameter.(below 0.6cm, <TEX>$0.6{\sim}3cm$</TEX>, <TEX>$3{\sim}6cm$</TEX>, and above 6cm). A validity of this model was verified by applying a fuel moisture variation after precipitation in this spring. In the result, <TEX>$R^2$</TEX> was <TEX>$0.76{\sim}0.92$</TEX>. This model will be a useful for improvement of a forest fire danger rate forcast through a prediction a fule moisture in forest.
영동지역 봄철 산불기간 중 소나무림 지표연료의 임내 연료습도변화 예측
이시영(Lee, Si-Young),이명욱(Lee, Myung-Woog),권춘근(Kwon, Chun-Geun),염찬호(Yeom, Chan-Ho),이해평(Lee, Hae-Pyeong) 한국화재소방학회 2008 한국화재소방학회 학술대회 논문집 Vol.2008 No.춘계
This study is the result between the variation of fuel moisture and the risk of forest fire through measuring the change of moisture containing ratio on-site and its average analysis for each diameter of surface dead fuels in the forest. The measurement was performed on six days from the day after a rainfall. The fuel moisture on-site was measured on the day when the accumulated rainfall was above 5.0mm, and the measurements was 2 times in spring. From the pine forest which were distributed around Samcheok and Donghae in Kangwondo, three regions were selected by loose, medium, and dense forest density, and the fuel moisture was measured on the ranges which are less than 0.6cm, 0.6-3.0cm, 3.0-6.0cm, and more than 6.0cm in the forest for six days from the day after a rainfall. The study showed that the moisture containing ratio converged on 3 - 4 days for surface deads fuels which diameter are less than 3.0cm and the convergence was made more than six days for ones which diameters are more than 3.0cm except the surface dead fuel of 3.0-6.0cm diameter of loose forest density.