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Novel pendrin inhibitor attenuates lipopolysaccharide-induced acute lung injury in mice
( Eun Hye Lee ),( Jae Young Choi ),( Mi Hwa Shin ),( Wan Namkung ),( Ji Soo Choi ),( Su Hwan Lee ),( Ah Young Leem ),( Sang Hoon Lee ),( Kyung Soo Chung ),( Song Yee Kim ),( Ji Ye Jung ),( Young Ae Ka 대한결핵 및 호흡기학회 2019 대한결핵 및 호흡기학회 추계학술대회 초록집 Vol.127 No.0
Background: Pendrin is encoded by SLC26A4 and its mutation leads to congenital hearing loss. Additionally, pendrin is up-regulated in inflammatory airway diseases such as chronic obstructive pulmonary disease, allergic rhinitis, and asthma. In this study, the effects of a novel pendrin inhibitor, YS-01, were investigated in an LPS-induced acute lung injury (ALI) mice model, and the mechanism underlying the effect of YS-01 was examined. Methods: LPS (10 mg/kg) was intranasally instilled in wild type (WT) and pendrin-null mice. Lung injury parameters were assessed in the lung tissue and bronchoalveolar lavage fluid (BALF). Pendrin levels in the BALF of 41 pneumonia/ARDS patients and 25 control (solitary pulmonary nodule) patients were also measured. Results: LPS instillation induced lung injury in WT mice but not in pendrin-null mice. YS-01 treatment dramatically attenuated lung injury and reduced BALF cell counts and protein concentration after LPS instillation in WT mice. Proinflammatory cytokines and NF-κB activation were suppressed by YS-01 treatment in LPS-induced ALI mice. However, the protective effects of pendrin inhibitor lost after SCN- instillation. Furthermore, pendrin expression was upregulated in pneumonia/ARDS patient compared to that in control patient BALF (mean, 24.86 vs. 6.83 ng/mL, p < 0.001). Conclusions: A novel Pendrin inhibitor, YS-01, suppressed lung injury in LPS-induced ALI mice and our data provide a new strategy for the treatment of inflammatory airway diseases including sepsis-induced ALI.
보급형 3D프린터를 이용한 인체 모형 뼈 팬텀 제작의 기초연구 : Femur 대상으로 적층형 출력 방식 이용
남궁은재(Eun-Jae Namkung),김도희(Do-Hee Kim),김소희(So-Hui Kim),박세은(Se-Eun Park),정다빈(Dabin Jung),박상협(Sang-Hyub Park),허영철(Yeong-Cheol Heo) 한국방사선학회 2020 한국방사선학회 논문지 Vol.14 No.5
본 연구에서는 보급형 3D 프린터를 이용하여 인체 Femur와 유사한 HU 값을 가진 팬텀을 제작하여 기존 돼지 뼈를 대체할 수 있는지 분석하고자 하였다. 인체 Femur의 HU 값을 알아보기 위해 연령별 총 372명의 데이터를 분석하였다. 보급형 3D 프린터를 이용하여 PLA-Cu 20%를 이용하여 인체 뼈 모형 팬텀을 제작하여 CT 검사하였다. 돼지 뼈는 생후 6개월 된 돼지로 도축된 지 2일이 지난 뼈를 이용하였다. 검사결과 내부 채움 80%로 제작한 3D 프린팅 팬텀이 인체의 모든 데이터와 유사한 값이 나타났고(p<0.05) 돼지뼈와는 차이가 있었다(p>0.05). 또한 연령대별 Femur의 HU 값의 경우 연령대가 증가할수록 HU의 값은 줄어드는 것으로 확인 되었다(p<0.05). 3D 프린팅과 HU 값은 적층 높이에 대해서는 약한 음의 상관성을 확인 하였지만 내부 채움에서는 182.13±1.290으로 강한 양의 상관성(R2=0.996)을 확인하였다(p<0.05). 결론적으로 3D 프린팅을 이용한 인체 모형 팬텀이 기존 돼지뼈 팬텀에 비해 인체와 유사한 정도의 HU 값을 나타낼 수 있음을 확인할 수 있었으며 이에 본 연구가 3D 프린터를 이용한 인체 모형 팬텀의 제작에 기초자료를 제공할 수 있을 것이라 사료된다. The purpose of this study was to create a phantom with a HU value similar to that of the human Femur using a 3D printer to replace the existing pig bone. A total of 372 people were analyzed to determine the HU value of human Femur. Using a 3D printer, a human bone model phantom was fabricated using PLA-Cu 20% and subjected to CT examination. Pig bones were 6 months old pigs, and bones 2 days after slaughter were used. As a result of the examination, the 3D printing phantom made with 80% of the internal filling showed a similar value to all data of the human body (p<0.05), and there was a difference from the pig bone (p>0.05). In addition, in the case of the HU value of Femur by age group, it was confirmed that the value of HU decreased as the age group increased (p<0.05). 3D printing and HU values confirmed a weak negative correlation with respect to the stacking height, but confirmed a strong positive correlation (R2 = 0.996) with 182.13±1.290 in the inner filling (p<0.05). In conclusion, it was confirmed that the human body model phantom using 3D printing can exhibit a similar level of HU value to the human body compared to the existing pig bone phantom, and this study will provide basic data for the production of a human body model phantom using a 3D printer.
Magnetic Separation for Contaminants in Wastewater Using Magnetic Micro Bead
Myung Ki Baek,Tan Il Sung,Eun Su Cho,Kyu Cheol Namkung,Dong Jin Bae,Il Han Park IEEE 2012 IEEE transactions on magnetics Vol.48 No.11
<P>In this paper, a new physical method for wastewater treatment that uses magnetic micro beads and a magnetic field is proposed. An experimental jar test for the separation of micro particle is carried out to show its feasibility. In the stirring process, contaminants of wastewater can adhere to magnetic beads, and then magnetic floc can be formed around the beads. This magnetic floc can be separated from the wastewater by an external magnetic field. A separation system is also designed, and its performance is numerically analyzed using the electromagnetic finite element method coupled with the fluid equation and the dynamic equation of particles wherein the driving force includes the magnetophoretic force, gravity, buoyancy, and drag force.</P>
빗물-저농도 오수 하이브리드 시스템의 설계 및 운전 평가
심인태(In-tae Shim),박현주(Hyun-ju Park),김충일(Tschung-il Kim),정성운(Sung-un Jung),한무영(Moo-young Han),남궁은(Eun Namkung) 대한환경공학회 2016 대한환경공학회지 Vol.38 No.12
본 연구에서는 빗물과 중수를 연계하여 각각의 단점을 극복하고 장점을 극대화 할 수 있는 빗물-저농도 오수 하이브리드 시스템을 설계하고 서울대학교에 설치하여 수량 및 수질 모니터링과 경제성을 평가하였다. 건물에서 발생하는 오수 중세면, 샤워용수를 중수로 선택하여 침지형 분리막과 오존산화 처리하였으며, 건물 옥상에서 집수된 빗물은 저류 후 처리수조로 이송되어 처리된 저농도 오수와 혼합되어 변기 세척용수로 공급하였다. 변기 세척용수 3,979 ㎥ 중 65%인 2,599 ㎥를 빗물 이용과 저농도 오수를 재이용하였다. 빗물은 총대장균을 제외한 나머지 항목에서 중수도 수질 기준을 만족하였으며, 저농도 오수는 탁도, SS, BOD, 총대장균이 기준치를 초과하여 침지형 분리막과 오존산화 처리하여 안정적인 수질을 유지하였다. 경제성 분석 결과, 빗물-저농도 오수 하이브리드 시스템은 B/C (Benefit-Cost Ratio) 비율이 1.11으로 사업의 타당성이 있다고 판단된다. 물 재이용시설의 이용확대를 위해 시설 운영에 따른 경제성을 높이기 위한 다양한 연구 및 정책적 지원이 필요하다. In this study, rainwater-greywater hybrid system was installed and operated for 1 year in order to evaluate its water quantity, water quality, and economic efficiency in building no. 39. This system was expected to overcome each disadvantages of and maximize each advantages. Low-greywater that was washed up from shower room was treated by MBR (Membrane Bioreactor) and ozone oxidation. Rainwater that was collected from the rooftop was stored in a reservoir, and then transferred to the storage tank that was mixed with treated greywater. After 1 year operating in building no. 39, rainwater and greywater was used to supply 2,599 ㎥ of toilet flushing water. In terms of water quality, rainwater was satisfied far the greywater reuse standards except for E.coli. Moreover, low greywater quality was acceptable except for E. coli, BOD, SS, and turbidity. In addition, economic analysis was obtained from benefit-cost ratio (B/C) with 1.11. It implies that the feasibility of the project was reasonable. Furthermore, various research and policy to improve the economic efficiency of water recycling facilities is required to expand the use of water recycling facilities.