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RISS 인기검색어
- 검색키워드
- 저자 : ( Misung Kim ) (검색결과 48 건)
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LVRT/HVRT System 모델 개발 전략에 관한 연구
김병기(Byungki Kim),유경상(Kyungsang Ryu),남양현(Yanghyun Nam),김찬수(Chansoo Kim),고희상(Heesang ko),김미성(Misung Kim),박재범(Jaebum Park),김대진(Daejin Kim) 대한전기학회 2021 대한전기학회 학술대회 논문집 Vol.2021 No.7
본 논문에서는 대용량 풍력발전기를 대상으로 일정기준이상 연계운전 능력을 평가할 수 있는 10MW급 이상의 LVRT(Low voltage Ride Through)/HVRT(Low voltage Ride Through)기능 모의가 가능한 시험장비의 개발 방안을 제안한다. 즉 RLC 방식의 단점을 보완한 단권변압기를 기반 탭 변환 방식시험장치의 권선비 조정 모델을 제안한다.. 상기에서 제안한 설계 및 운영 방안을 바탕으로 구현한축소형 LVRT/HVRT 시험장비의 성능시험을 통해 본 논문에서 제시한 설비의 유용성을 확인하였다.
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Relationship between vitamin K status, bone mineral density, and hs-CRP in young Korean women
Misung Kim,Heeseon Kim,Cheongmin Sohn 대한지역사회영양학회 2010 Nutrition Research and Practice Vol.4 No.6
Vitamin K intake has been reported as an essential factor for bone formation. The current study was conducted under the hypothesis that insufficient vitamin K intake would affect inflammatory markers and bone mineral density in young adult women. The study was a cross-sectional design that included 75 women in their 20s. Physical assessments, bone mineral density measurements, 24-hr dietary recalls, and biochemical assessments for high sensitivity C-reactive protein (hs-CRP) and percentages of undercarboxylated osteocalcin (%ucOC) were performed. An analysis of vitamin K nutritional status was performed comparing first, second, and third tertiles of intake based on %ucOC in plasma. Vitamin K intake levels in the first, second, and third tertiles were 94.88 ± 51.48 ㎍, 73.85 ± 45.15 ㎍, and 62.58 ± 39.92 ㎍, respectively (P < 0.05). The T-scores of the first and third tertiles were 1.06 and -0.03, respectively, indicating that bone mineral density was significantly lower in the group with lower vitamin K intake (P < 0.05). There was a tendency for different serum hs-CRP concentrations between the first (0.04 ± 0.02) and third tertiles (0.11 ± 0.18), however this was not statistically significant. Regression analysis was performed to identify the correlations between vitamin K nutritional status, inflammatory markers, and bone mineral density after adjusting for age and BMI. Serum hs-CRP concentrations were positively correlated with vitamin K deficiency status (P < 0.05). And bone mineral density, which was represented by speed, was negatively correlated with vitamin K deficiency status (P < 0.05). In conclusion, status of vitamin K affects inflammatory status and bone formation. Therefore, sufficient intake of vitamin K is required to secure peak bone mass in young adult women.
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Kim, Misung,Shin, Weon Ho,Bang, Jiwon Elsevier 2019 Journal of luminescence Vol.205 No.-
<P><B>Abstract</B></P> <P>Fluorescent InP-based quantum dots (QDs) have attracted much attention as materials for display applications. Over the past few years, persistent effort has focused on improving photoluminescence (PL) quantum yields and narrowing PL bandwidths through synthesis; as a consequence, the PL properties of InP-based QDs are now comparable to of those of CdSe QDs. Unfortunately, the lack of PL stability in degradable environments has hindered investigations into the applications of these materials. Herein, we report the synthesis of green-emitting In(Zn,Ga)P/ZnSeS/ZnS small-core/thick-multishell QDs that exhibit 78% of the maximum PL quantum yield. Zn and Ga impurities in the InP-QD cores reduce the lattice constant of the InP QDs, which facilitates the growth of thick ZnSeS/ZnS shells. Due to protection of the QD exciton, which is spread away from the surface of the In(Zn,Ga)P/ZnSeS (core/shell) structure by the perfect passivating properties of the thick ZnS shell, the green-emitting In(Zn,Ga)P/ZnSeS/ZnS (core/multishell) QDs are significantly more photostable than In(Zn,Ga)P/ZnSeS QDs. A close-packed QD film displayed bright green (532 nm) emission with suppressed concentration quenching, which is useful for environmentally friendly QD-based displays.</P>
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Kim, Misung,Na, Woori,Sohn, Cheongmin the Society for Free Radical Research Japan 2013 Journal of clinical biochemistry and nutrition Vol.53 No.2
<P>Several reports suggest that obesity is a risk factor for osteoporosis. Vitamin K plays an important role in improving bone metabolism. This study examined the effects of vitamin K1 and vitamin K2 supplementation on the biochemical markers of bone turnover and morphological microstructure of the bones by using an obese mouse model. Four-week-old C57BL/6J male mice were fed a 10% fat normal diet group or a 45% kcal high-fat diet group, with or without 200 mg/1000 g vitamin K1 (Normal diet + K1, high-fat diet + K1) and 200 mg/1000 g vitamin K2 (Normal diet + K2, high-fat diet + K2) for 12 weeks.</P><P>Serum levels of osteocalcin were higher in the high-fat diet + K2 group than in the high-fat diet group. Serum OPG level of the high-fat diet group, high-fat diet + K1 group, and high-fat diet + K2 group was 2.31 ± 0.31 ng/ml, 2.35 ± 0.12 ng/ml, and 2.90 ± 0.11 ng/ml, respectively. Serum level of RANKL in the high-fat diet group was significantly higher than that in the high-fat diet + K1 group and high-fat diet + K2 group (<I>p</I><0.05). Vitamin K supplementation seems to tend to prevent bone loss in high-fat diet induced obese state. These findings suggest that vitamin K supplementation reversed the high fat diet induced bone deterioration by modulating osteoblast and osteoclast activities and prevent bone loss in a high-fat diet-induced obese mice.</P>
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Gain and loss of antibiotic resistant genes in multidrug resistant bacteria: One Health perspective
Kim Misung,Park Jaeeun,Kang Mingyeong,Yang Jihye,Park Woojun 한국미생물학회 2021 The journal of microbiology Vol.59 No.6
The emergence of multidrug resistance (MDR) has become a global health threat due to the increasing unnecessary use of antibiotics. Multidrug resistant bacteria occur mainly by accumulating resistance genes on mobile genetic elements (MGEs), made possible by horizontal gene transfer (HGT). Humans and animal guts along with natural and engineered environments such as wastewater treatment plants and manured soils have proven to be the major reservoirs and hotspots of spreading antibiotic resistance genes (ARGs). As those environments support the dissemination of MGEs through the complex interactions that take place at the human-animalenvironment interfaces, a growing One Health challenge is for multiple sectors to communicate and work together to prevent the emergence and spread of MDR bacteria. However, maintenance of ARGs in a bacterial chromosome and/or plasmids in the environments might place energy burdens on bacterial fitness in the absence of antibiotics, and those unnecessary ARGs could eventually be lost. This review highlights and summarizes the current investigations into the gain and loss of ARG genes in MDR bacteria among human-animal- environment interfaces. We also suggest alternative treatments such as combinatory therapies or sequential use of different classes of antibiotics/adjuvants, treatment with enzymeinhibitors, and phage therapy with antibiotics to solve the MDR problem from the perspective of One Health issues.
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