http://chineseinput.net/에서 pinyin(병음)방식으로 중국어를 변환할 수 있습니다.
변환된 중국어를 복사하여 사용하시면 됩니다.
Decreased Insulin Secretion in Women with Previous Gestational
Yoon Pyo Lee,Soo Kyung Lim,Ji young Chang,Eun kyo Jung,Youn-i Choi,Jee-Young Oh,Youngsun Hong,Yeon-Ah Sung,Hyejin Lee 이화여자대학교 의과학연구소 2015 EMJ (Ewha medical journal) Vol.38 No.1
Objectives: Gestational diabetes mellitus (GDM) affects 2%–4% of the all pregnant women, and it is a major risk factor for development of type 2 DM. We performed this cross-sectional study to determine whether there were defects in insulin secretory capacity or insulin sensitivity in women with previous GDM. Methods: On 6–8 weeks after delivery, 75 g oral glucose tolerance test was performed in 36 women with previous GDM and 19 non-pregnant control women matched with age and weight. Intravenous glucose tolerance test was performed on 10–14 weeks after delivery. Insulin secretory capacity measured as the acute insulin response to glucose (AIRg) and insulin sensitivity as minimal model derived sensitivity index (SI) were obtained. AIRg×SI (β-cell disposition index) was used as an index of β-cell function. Results: Women with previous GDM were classified into normal glucose tolerance (postpartum-NGT, n=19) and impaired glucose tolerance (postpartum-IGT, n=17). Postpartum fasting glucose levels were significantly higher in postpartum-IGT compared to postpartum-NGT and control (P<0.05). AIRg×SI was significantly lower in postpartum-IGT compared to control (P<0.05). SI was lower in postpartum-NGT and postpartum-IGT compared to control, but the difference did not have the statistical significance. Frequency of parental history of type 2 diabetes was significantly greater in postpartum-IGT compared to postpartum-NGT (P<0.05). Conclusion: Women with previous GDM showed impaired insulin secretion although their glucose tolerance states were restored to normal. It suggests impaired early insulin secretion may be a major pathophysiologic factor for development of type 2 DM, and this defect may be genetically determined.
Comparison of Mechanical Properties between Carbon/PEEK Composites and Ti Stem for Optimal Design
Yoon, Sung-Won,Kim, Yun-Hae,Jung, Min-Kyo,Murakami, Ri-Ichi Korean Society of Ocean Engineers 2013 International journal of ocean system engineering Vol.3 No.3
This study, a new concept design of the stem and aims to determine the suitability of various carbon/PEEK composite designs for artificial hip joints. Shear stress tested with alternative materials of the Ti-based stem for artificial hip joints. In addition, FEA is conducted according to the fiber ply orientation and the load condition for carbon/PEEK composites. The stem shape of two types was designed through the shape normal of the femur. Multidirectional load cases were used for each FEA model. In the case of general shape, the results show that the stress of ply orientation case II was lower than for cases I and III. On the other hand, in the case of the curved shape, ply orientation case I was lowest. In the case of the Ti stem, the stress of the curved shape was 18% lower than the general shape.
Sang-Hyeok Yoon,Tangnuer Sadike,Jin-Rui Ding,Kyo Seon Kim 한국공업화학회 2020 Journal of Industrial and Engineering Chemistry Vol.85 No.-
We demonstrate the cobalt phosphate (Co-Pi) modified 1-D WO3/BiVO4 nanowire heterojunctionphotoanode as oxygen evolution catalyst for photoelectrochemical (PEC) water splitting application. WO3 nanowires were prepared byflame vapor deposition (FVD) process and BiVO4 nanoparticles werespin-coated on top of WO3 nanowires. In order to improve oxygen evolution kinetics, WO3/BiVO4heterojunction photoanode was modified by photo-assisted electrodeposition of Co-Pi. Co-Pi improvethe PEC water oxidation efficiency of 1 D-WO3/BiVO4 by reducing the charge recombination, facilitatingthe hole transfer and reducing the overpotential of oxygen evolution reaction. The optimum amount ofCo-Pi for high photocurrent density was proposed. The loaded Co-Pi has enhanced the overall PECperformance showing largely shifted onset potential ( 450 mV) with significantly increased photocur-rent (2.7 times at 1.23 V vs. RHE). The prepared composite photoanode of 1-D WO3/BiVO4/Co-Pi showsthe higher incident photon to current efficiency and applied bias photon-to-current efficiency thanwithout Co-Pi loading. We obtain the highest level of PEC performance with WO3/BiVO4/Co-Piheterojunction composite photoanode which is based on 1-D framework of WO3 prepared by facile, rapidand economical FVD in this study.
Distribution and survival of primary sarcoma in Korea
Sung Jun Jo,Kyeong Sik Kim,Kyo Won Lee,Jae Berm Park,Yoon-La Choi,Jeong Il Yu,Su Jin Lee,Dong Il Choi,Sung Joo Kim 대한종양외과학회 2018 Korean Journal of Clinical Oncology Vol.14 No.1
Purpose: Distribution and survival of sarcoma in Korea are not well described, after the changing of sarcoma classification on 2013. The researchers investigated the distribution and survival in single center 2017 cases of sarcoma. Methods: Patients with primary sarcoma, who underwent surgery, were investigated. All cases were collected during a 20 year period (1995–2015) from Samsung Medical Center in Korea. Histopathologic types were classified by World Health Organization (WHO) classification (2013). And overall survival rates were analyzed. Results: Between 1995 and 2015, 2017 patients were collected. The most frequent type of sarcoma was gastrointestinal tumor (15%), followed by liposarcoma (12%), leiomyosarcoma (9%), dermatofibrosarcoma (6%), giant cell sarcoma (6%). The most common primary site of sarcoma was the intra-abdominal area (45%, including visceral area). Extremities accounted for 26% of all cases. Sixteen percent of sarcoma were located in retroperitoneal area. The overall survival rate was 70.4% (median follow-up time, 36.8 months; range, 0.1–261.3 months). The best prognosis was dermatofibrosarcoma (100%, 5-year survival rate). The worst prognosis was angiosarcoma (39.3%). Survival analysis by the primary site demonstrated favor prognosis in extremities than head & neck, chest lesion. Conclusion: The researchers reported Korean sarcoma characteristics with using the new WHO classification.
Yoon, Sang-Hyeok,Kim, Kyo-Seon Elsevier 2019 Journal of industrial and engineering chemistry Vol.73 No.-
<P><B>Abstract</B></P> <P>Flame vapor deposition (FVD) process is the fast and effective method to prepare high quality 1-D nanostructured tungsten oxide thin film, which has several advantages in photoelectrochemical (PEC) water splitting such as more sunlight absorption, straight electron path and short diffusion length of electron hole. The precursor concentration in FVD process is the most important process variable to determine the morphology of prepared nanostructures. In this study, the precursor concentration in FVD process was controlled precisely and flexibly by adjusting the tungsten feed rate with the wire feeding device which we developed. Several interesting nanostructures were prepared in FVD process by modulating the precursor concentration with time and the reasonable growth mechanisms for developments of those nanostructures are also proposed. The narrower and longer 1-D tungsten oxide nanostructure could be prepared by controlling the precursor feed rate and deposition time in FVD process, which is desirable for efficient PEC water splitting.</P> <P><B>Graphical abstract</B></P> <P>[DISPLAY OMISSION]</P>
Traction force microscopy for understanding cellular mechanotransduction
( Sung Sik Hur ),( Ji Hoon Jeong ),( Myung Jin Ban ),( Jae Hong Park ),( Jeong Kyo Yoon ),( Yongsung Hwang ) 생화학분자생물학회(구 한국생화학분자생물학회) 2020 BMB Reports Vol.53 No.2
Under physiological and pathological conditions, mechanical forces generated from cells themselves or transmitted from extracellular matrix (ECM) through focal adhesions (FAs) and adherens junctions (AJs) are known to play a significant role in regulating various cell behaviors. Substantial progresses have been made in the field of mechanobiology towards novel methods to understand how cells are able to sense and adapt to these mechanical forces over the years. To address these issues, this review will discuss recent advancements of traction force microscopy (TFM), intracellular force microscopy (IFM), and monolayer stress microscopy (MSM) to measure multiple aspects of cellular forces exerted by cells at cell-ECM and cell-cell junctional intracellular interfaces. We will also highlight how these methods can elucidate the roles of mechanical forces at interfaces of cell-cell/cell-ECM in regulating various cellular functions. [BMB Reports 2020; 53(2): 74-81]
Sang Hun Park,Chae Yoon Bae,Hong Kyu Kim,Hyun Kyo Jung IEEE 2006 IEEE transactions on magnetics Vol.42 No.4
<P>Computer simulation is performed in a whole breaking period except the region of current zero of gas circuit breaker. The Euler equation is solved using the finite volume fluid in cell method. In order to consider the effects of arc, electric field intensity and radiation transport are calculated using the finite element method and the method of partial characteristics, respectively. Also, the quantity and the electrical conductivity of ablated nozzle vapor are calculated, and its effects are investigated through computer simulation. Improved simulation results are obtained and compared with the experimental one</P>