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저선량 γ선 조사가 참박의 초기 생육과 효소 활성 및 광합성 능에 미치는 영향
이혜연,김재성,백명화,이영근,임돈순 한국환경생물학회 2002 환경생물 : 환경생물학회지 Vol.20 No.3
저선량 γ선 조사가 참박의 초기생육과 생리활성에 미치는 효과를 알아보기 위하여 참박 종자에 γ선을 O~2OGy 수준으로 조사하여 생육을 관찰하였다. 저선량 γ선에 의한 참박의 초기생육은 대조구에 비해 4~16Gy에서 다소 증가하였고, 생육 조사시 측정한 자엽의 경우 catalase와 peroxidase활성이 대조구에 비해 8Gy조사구에서 가장 높았으며 본엽은 peroxidase 활성이 4Gy 조사구에서 확연히 증가하였다. 저선량 γ선을 조사한 박 식물체의 광 스트레스에 대한 반응효과는 광계Ⅱ의 광화학적 효율이 대조구와 8Gy의 경우 50%정도 감소되었으나 4Gy에서는 40%정도의 감소를 보였다. 반면 Fo는 광저해가 진행됨에 따라 약간의 증가를 보였으나 대조구나 저선량 조사구사이의 차이는 거의 없는 것으로 나타났다. 광계Ⅱ의 광양자 수율, φ_PSⅡ과 광계Ⅱ 반응중심의 흥분 포획능, 1/Fo-l/Fm 또한 광저해가 진행되는 동안 감소하여 φ_PSⅡ는 대조구와 8 Gy의 경우 20%정도 감소를 보인 반면 4Gy조사구는 15%의 감소를 보였고, 1/Fo-lF/m은 대조구와 8Gy는 55%,4 Gy는 45%의 감소를 나타냈다. 비광화학적 소멸인 NPQ는 대조구와 저선량 조사구 모두 70% 정도 감소되는 경향을 보였다. 이러한 결과를 볼 때 종자의 종피를 투과한 저선량의 γ선이 참박의 생육을 촉진시키고 4Gy에서 광 스트레스에 대한 저해가 감소되었다. Gourd seeds were irradiated with the doses of 0∼20 Gy to investigate the effect of the low dose ??-radiation on the early growth and physiological activity. The stimulating effects of the low dose ??-radiation on the early growth were not noticeably high, but were increased generally at 4∼16 Gy irradiation group. The catalase and peroxidase activity of cotyledon from seeds irradiated with ??-radiation were increased at 8 Gy irradiation group. The peroxidase activity of leaf was noticeably high at 4 Gy irradiation group. The photochemical yield of PSⅡ, estimated as Fv/Fm, decreased with increasing illumination time by 50% after 4hrs in the control and 8 Gy irradiation group, while Fo slightly increased. However, Fv/Fm in the 4 Gy irradiation group decreased by 40% of inhibition, indicating that photoinhibition decreased by the low dose ??-radiation. Changes in the effective quantum yield of PSⅡ, Φ_PSⅡ and 1/Fo-1/Fm, a measure of the rate constant of excitation trapping by the PSⅢ reaction center, showed similar pattern to Fv/Fm. NPQ decreased by 70% after photoinhibitory treatment with showing similar pattern between the control and the irradiation group. These results showed the positive effect of low dose ??-radiation on the seedling growth and the reduction of photoinhibition in the 4 Gy irradiation group.
Updating Korean Disability Weights for Causes of Disease: Adopting an Add-on Study Method
Dasom Im,Noor Afif Mahmudah,Seok-Jun Yoon,Young-Eun Kim,Don-Hyung Lee,Yeon-hee Kim,Yoon-Sun Jung,Minsu Ock The Korean Society for Preventive Medicine 2023 예방의학회지 Vol.56 No.4
Objectives: Disability weights require regular updates, as they are influenced by both diseases and societal perceptions. Consequently, it is necessary to develop an up-to-date list of the causes of diseases and establish a survey panel for estimating disability weights. Accordingly, this study was conducted to calculate, assess, modify, and validate disability weights suitable for Korea, accounting for its cultural and social characteristics. Methods: The 380 causes of disease used in the survey were derived from the 2019 Global Burden of Disease Collaborative Network and from 2019 and 2020 Korean studies on disability weights for causes of disease. Disability weights were reanalyzed by integrating the findings of an earlier survey on disability weights in Korea with those of the additional survey conducted in this study. The responses were transformed into paired comparisons and analyzed using probit regression analysis. Coefficients for the causes of disease were converted into predicted probabilities, and disability weights in 2 models (model 1 and 2) were rescaled using a normal distribution and the natural logarithm, respectively. Results: The mean values for the 380 causes of disease in models 1 and 2 were 0.488 and 0.369, respectively. Both models exhibited the same order of disability weights. The disability weights for the 300 causes of disease present in both the current and 2019 studies demonstrated a Pearson correlation coefficient of 0.994 (p=0.001 for both models). This study presents a detailed add-on approach for calculating disability weights. Conclusions: This method can be employed in other countries to obtain timely disability weight estimations.
상세 에너지정보 제공을 위한 업무시설에서의 용도별 에너지사용량 계측 방법 사례
진혜선(Jin, Hye-Sun),임수현(Lim, Su-Hyun),강진경(Kang, Jin-Kyung),김성임(Kim, Sung-Im),임재한(Lim, Jae-Han),김영돈(Kim, Young-Don),송승영(Song, Seung-Yeong) 대한건축학회 2017 大韓建築學會論文集 : 構造系 Vol.33 No.7
In order to reduce greenhouse gas emissions nationwide, the Korean government has announced a target of reducing greenhouse gases by 37% relative to the business-as-usual (BAU) level by 2030. Because the building sector is important for the reduction of greenhouse gas emissions, various policies are being strengthened to reduce building energy consumption. In order for these policies to have a substantial effect, it is necessary to ensure technological and economic feasibility in the marketplace and to provide energy information that can be easily understood and evaluated by building owners and engineers. Providing information that accounts for the status of energy consumption by end-use (heating, cooling, domestic hot water, lighting, etc.) is a very important part of establishing a concrete action plan for energy conservation. In response, a national research project is being conducted regarding the installation of the continuous measurement systems of energy consumption by end-use in sample buildings and the creation of a reference energy use intensity (EUI) database and benchmarking system for comparative analysis. As a basis for this national project, this study defined energy consumption by end-use for office buildings. The study also made principles to measure such consumption and convert the measured data into EUI. Eighty five office buildings were selected as samples. The installation of measurement systems for the sample buildings is scheduled to be completed in phases over 4 years starting in 2015, and measurement systems have thus far been installed in 19 office buildings. A reference EUI database for office buildings and a benchmarking tool based on this database will be made available after 2020, and similar systems for apartment buildings are now being established.
Pyoeng Gyun Choe,Eun Kyo Kang,Sun Young Lee,Boram Oh,Dahae Im,Hyo Yeon Lee,Hyemin Jung,Chang Kyung Kang,Min Sun Kim,Wan Beom Park,Eun Hwa Choi,Be Long Cho,Myoung-don Oh,Nam Joong Kim 대한내과학회 2020 The Korean Journal of Internal Medicine Vol.35 No.4
Background/Aims: As the novel coronavirus (coronavirus disease 2019 [COVID-19]) outbreak progresses rapidly, staying home is recommended for suspected patients; however, the safety of this recommendation is uncertain. In Korea, non-hospital facilities called “living and treatment centers (LTCs)” have been established since 5 March 2020. The LTCs provided a unique opportunity to evaluate the safety of selection criteria for low-risk groups. Methods: Between 5 March and 9 April 2020, patients with COVID-19 who met the following criteria were admitted to the LTC; alert, age below 65 years old, no underlying disease or well-controlled underlying disease, body temperature below 38.0°C, whether taking antipyretics or not, and no dyspnea. Patients were closely observed by doctors or nurses’ interviews twice a day and transferred to hospitals when symptoms worsened. Results: A total of 113 patients were admitted to the LTC; 52.2% were female, with a median age of 25 years (interquartile range, 21.5 to 39.5). Of 113 patients, 54 (47.8%) were asymptomatic at diagnosis, and 15 (13.3%) had no symptoms until they were released from isolation. During the follow-up period, two (1.8%) patients were transferred to a hospital but did not progress to severe status during hospitalization. Conclusions: The risk of progression was negligible in COVID-19 patients who met the admission criteria for LTC at the time of diagnosis. LTCs could be a safe alternative considering shortage of hospital beds.
Hyun-Jong Kim,Sang-Rae Cho,Chang-Yong Choe,Sun-Ho Choi,Dong-Soo Son,Sung-Jae Kim,Byung-Don Sang,Man-Hye Han,Il-Sun Ryu,In-Cheul Kim,Il-Hwa Kim,Woon-Kyu Lee,Kyung-Soon Im 사단법인 한국동물생명공학회 2007 한국동물생명공학회지 Vol.22 No.4
The aim of present experiment was to examine hatching rate as in vitro indicator of viability of porcine embryos before early stage embryo transfer such as zygotes or 2-cell stage embryos. Cumulus-oocyte complexes (COCs) collected from ovaries were matured in North Carolina State University 23 (NCSU-23) containing 10% porcine follicular fluid (pFF), 10 ng/ml epidermal growth factor (EGF), 10μg/ml follicle stimulating hormone (FSH), 35μg/ml luteinizing hormone (LH), and 1mg/ml cysteine. After 24 hours, the COCs were transferred to the same medium without hormones. After 65h of maturation, oocytes were exposed to phosphate buffered saline (PBS) with 7% ethanol (v/v) for 7 minutes, and then the oocytes were washed and cultured in tissue culture medium (TCM) 199 containing 5 ug/ml cytochalasin B for 5h at 38.5℃ in an atmosphere of 5% CO2 and 95% air with high humidity. After cytochalasin B treatment, the presumptive parthenotes were cultured in porcine zygote medium (PZM)-5 and cleavage of the parthenotes was assessed at 72h of activation, Normally cleaved parthenotes were cultured for an additional 8 days to evaluate their ability to develop to blastocyst and hatching stages. The fetal bovine serum (FBS) were added at Day 4 or 5 with concentrations of 2.5, 5 or 10%. The blastocyst rates were ranged within 39.1~70% in each treatment. However hatching rate was dramatically decreased in non-addition group. In this experiment, embryo viability in female reproductive tract may be estimated before embryo transfer with in vitro culture adding FBS by hatching ability.
박태근,김부성,이창돈,유순집,임계순,양영상,윤기주,선희식 대한내과학회 1990 대한내과학회지 Vol.39 No.1
Ogilvie's syndrome is a descriptive term referring to a clinical entity in which the signs and symptoms of rapid colonic distension are present without evidence of mechanical obstruction. The pathogenesis of pseudoobstruction remains unknown. Because it has been associated with such a wide variety of concomitant conditions, it is likely that several pathophysiologic mechanisms may trigger the pseudoobstruction. This syndrome is clinically important because of impending colonic perforation due to marked colonic distension. We experienced a case of Ogilvie's syndrome associated with pancreas cancer and reported with the review of the literature.
Kim, Hyun-Jong,Cho, Sang-Rae,Choe, Chang-Yong,Choi, Sun-Ho,Son, Dong-Soo,Kim, Sung-Jae,Sang, Byung-Don,Han, Man-Hye,Ryu, Il-Sun,Kim, In-Cheul,Lee, Woon-Kyu,Im, Kyung-Soon 韓國受精卵移植學會 2007 한국동물생명공학회지 Vol.22 No.4
The aim of present experiment was to examine hatching rate as in vitro indicator of viability of porcine embryos before early stage embryo transfer such as zygotes or 2-cell stage embryos. Cumulus-oocyte complexes (COCs) collected from ovaries were matured in North Carolina State University 23 (NCSU-23) containing 10% porcine follicular fluid (pFF), 10 ng/ml epidermal growth factor (EGF), follicle stimulating hormone (FSH), luteinizing hormone (LH), and 1mg/ml cysteine. After 24 hours, the COCs were transferred to the same medium without hormones. After 65h of maturation, oocytes were exposed to phosphate buffered saline (PBS) with 7% ethanol (v/v) for 7 minutes, and then the oocytes were washed and cultured in tissue culture medium (TCM) 199 containing 5 ug/ml cytochalasin B for 5h at in an atmosphere of 5% and 95% air with high humidity. After cytochalasin B treatment, the presumptive parthenotes were cultured in porcine zygote medium (PZM)-5 and cleavage of the parthenotes was assessed at 72h of activation, Normally cleaved parthenotes were cultured for an additional 8 days to evaluate their ability to develop to blastocyst and hatching stages. The fetal bovine serum (FBS) were added at Day 4 or 5 with concentrations of 2.5, 5 or 10%. The blastocyst rates were ranged within in each treatment. However hatching rate was dramatically decreased in non-addition group. In this experiment, embryo viability in female reproductive tract may be estimated before embryo transfer with in vitro culture adding FBS by hatching ability.