http://chineseinput.net/에서 pinyin(병음)방식으로 중국어를 변환할 수 있습니다.
변환된 중국어를 복사하여 사용하시면 됩니다.
비부비동 반정성 유두종의 전산화 단층촬영상과 자기공명영상의 분석
배창훈,서영중,이석춘,천승민,백운희,정은채,송시연,김용대 영남대학교 의과대학 2005 Yeungnam University Journal of Medicine Vol.22 No.2
Background: Computed tomography (CT) is commonly used to evaluate the degree of sinus involvement in case of inverted papilloma (IP). However, CT cannot differentiate tumor from adjacent inflammatory mucosa or retained secretions. By contrast, magnetic resonance imaging (MRI) has been reported to be useful in distinguishing IP from paranasal sinusitis. This study investigated whether preoperative assessment with MRI and CT accurately predict the extent of IP. Materials and methods: CT and MRI were retrospectively reviewed in 9 case of IP. Patients were categorized into staged based on CT and MRI findings according to the staging system proposed by Krouse. The involvement of IP in each sinus was also assessed. Results: Differentiation of IP from inflammatory disease may be more successful in routine case where the inflammatory mucosa has low signal intensity on T1-weighted images and very high signal intensity on T2-weighted images. CT imaging could not differentiate tumor from adjacent inflammatory mucosa or retained secretions. Conclusion: Preoperative MRI of IP can predict the location and extent of the tumor involvement in the paranasal sinuses and sometimes predicts malignant changes.
김미영,김영수,박상준,신용운,권계숙,이돈행,민효영,조현근,김대혁,김준미,김범수,최 원 대한소화기학회 1999 대한소화기학회지 Vol.33 No.6
Actinomycosis is a chronic granulomatous and suppurative disease caused by Actinomyces species. As a pathogen, it can cause fistulas or sinuses, and may form a mass. Sulfur granules in the lesion, sinu walls or discharge are characteristics of actinomycosis. The most common location of abdominal actinomycosis is the appendix or ileocecal region of the intestine. In addition, actinomycosis has been found in the rectum, the sigmoid and the transverse colon as well as the liver, the pancreas and th pelvis. However, primary rectus abdominis actinomycosis is a rare form of actinomycosis. We repor a case of primary rectus abdominis actinomycosis presenting an abdominal mass in a 60-year-old man whose chief complaint is fever.
Young-Rye Kang,Hak-Yong Lee,Jung-Hoon Kim,Dea-In Moon,Min-Young Seo,Sang-Hoon Park,Kwang-Ho Choi,Chang-Ryong Kim,Sang-Hyun Kim,Ji-Hyun Oh,Seong-Wan Cho,Sun-Young Kim,Min-Gul Kim,Soo-Wan Chae,Okjin Kim 한국실험동물학회 2012 Laboratory Animal Research Vol.28 No.1
Yerba Mate, derived from the leaves of the tree, Ilex paraguariensis, is widely-used as a tea or as an ingredient in formulated foods. The aim of the present study was to evaluate the effects of Yerba Mate extract on weight loss, obesity-related biochemical parameters, and diabetes in high-fat diet-fed mice.To this end, by using in vivo animal models of dietary-induced obesity, we have made the interesting observations that Yerba Mate has the ability to decrease the differentiation of pre-adipocytes and to reduce the accumulation of lipids in adipocytes, both of which contribute to a lower growth rate of adipose tissue, lower body weight gain, and obesity. Our data from in vivo studies revealed that Yerba Mate treatment affects food intake, resulting in higher energy expenditure, likely as a result of higher basal metabolism in Yerba Mate-treated mice. Furthermore, in vivo effects of Yerba Mate on lipid metabolism included reductions in serum cholesterol, serum triglycerides, and glucose concentrations in mice that were fed a high fat diet. In conclusion, Yerba Mate can potentially be used to treat obesity and diabetes.
Young Kug Choo,Dong Hoon Kwak,Sung Min Kim,Dea Hoon Lee,Ji Su Kim,Sun Mi Kim,Seo Ul Lee,Kyu Yong Jung,Byoung Boo Seo 한국분자세포생물학회 2005 Molecules and cells Vol.20 No.3
Neuronal damage subsequent to transient cerebral ischemia is a multifactorial process involving several overlapping mechanisms. Gangliosides, sialic acidconjugated glycosphingolipids, reduce the severity of acute brain damage in vitro. However their in vivo effects on the cerebral cortex damaged by ischemic infarct are unknown. To assess the possible protective role of gangliosides we examined their expression in the cerebral cortex damaged by ischemic infarct in the rat. Ischemia was induced by middle cerebral artery (MCA) occlusion, and the resulting damage was observed by staining with 2, 3, 5-triphenylterazolium chloride (TTC). High-performance thin-layer chromatography (HPTLC) showed that gangliosides GM3 and GM1 increased in the damaged cerebral cortex, and immunofluorescence microscopy also revealed a significant change in expression of GM1. In addition, in situ hybridization demonstrated an increase in the mRNA for ganglioside GM3 synthase. These results suggest that gangliosides GM1 and GM3 may be synthesized in vivo to protect the cerebral cortex from ischemic damage.
Kim, Myeong Seop,Ryu, HyungChul,Kang, Dong Wook,Cho, Seong-Hee,Seo, Sejin,Park, Young Soo,Kim, Mi-Yeon,Kwak, Eun Joo,Kim, Yong Soo,Bhondwe, Rahul S.,Kim, Ho Shin,Park, Seul-gi,Son, Karam,Choi, Sun,DeA American Chemical Society 2012 Journal of medicinal chemistry Vol.55 No.19
<P>A series of <I>N</I>-(2-amino-6-trifluoromethylpyridin-3-ylmethyl)-2-(3-fluoro-4-methylsulfonylaminophenyl)propanamides were designed combining previously identified pharmacophoric elements and evaluated as hTRPV1 antagonists. The SAR analysis indicated that specific hydrophobic interactions of the 2-amino substituents in the C-region of the ligand were critical for high hTRPV1 binding potency. In particular, compound <B>49</B><I><B>S</B></I> was an excellent TRPV1 antagonist (<I>K</I><SUB>i(CAP)</SUB> = 0.2 nM; IC<SUB>50(pH)</SUB> = 6.3 nM) and was thus approximately 100- and 20-fold more potent, respectively, than the parent compounds <B>2</B> and <B>3</B> for capsaicin antagonism. Furthermore, it demonstrated strong analgesic activity in the rat neuropathic model superior to <B>2</B> with almost no side effects. Compound <B>49</B><I><B>S</B></I> antagonized capsaicin induced hypothermia in mice but showed TRPV1-related hyperthermia. The basis for the high potency of <B>49</B><I><B>S</B></I> compared to <B>2</B> is suggested by docking analysis with our hTRPV1 homology model in which the 4-methylpiperidinyl group in the C-region of <B>49</B><I><B>S</B></I> made additional hydrophobic interactions with the hydrophobic region.</P><P><B>Graphic Abstract</B> <IMG SRC='http://pubs.acs.org/appl/literatum/publisher/achs/journals/content/jmcmar/2012/jmcmar.2012.55.issue-19/jm300780p/production/images/medium/jm-2012-00780p_0014.gif'></P><P><A href='http://pubs.acs.org/doi/suppl/10.1021/jm300780p'>ACS Electronic Supporting Info</A></P>
Kim, Sok-Ho,Na, Ji-Young,Song, Ki-Bbeum,Choi, Dea-Seung,Kim, Jong-Hoon,Kwon, Young-Bae,Kwon, Jung-Kee The Korean Society of Ginseng 2012 Journal of Ginseng Research Vol.36 No.2
The abnormal maturation and ossification of articular chondrocytes play a central role in the pathogenesis of osteoarthritis (OA). Inhibiting the enzymatic degradation of the extracellular matrix and maintaining the cellular phenotype are two of the major goals of interest in managing OA. Ginseng is frequently taken orally, as a crude substance, as a traditional medicine in Asian countries. Ginsenoside $Rb_1$, a major component of ginseng that contains an aglycone with a dammarane skeleton, has been reported to exhibit various biological activities, including anti-inflammatory and anti-tumor effects. However, a chondroprotective effect of ginsenoside $Rb_1$ related to OA has not yet been reported. The purpose of this study was to demonstrate the chondroprotective effect of ginsenoside $Rb_1$ on the regulation of pro-inflammatory factors and chondrogenic genes. Cultured rat articular chondrocytes were treated with 100 ${\mu}M$ ginsenoside $Rb_1$ and/or 500 ${\mu}M$ hydrogen peroxide ($H_2O_2$) and assessed for viability, reactive oxygen species production, nitric oxide (NO) release, and chondrogenic gene expression. Ginsenoside $Rb_1$ treatment resulted in reductions in the levels of pro-inflammatory cytokine and NO in $H_2O_2$-treated chondrocytes. The expression levels of chondrogenic genes, such as type II collagen and SOX9, were increased in the presence of ginsenoside $Rb_1$, whereas the expression levels of inflammatory genes related to chondrocytes, such as MMP1 and MMP13, were reduced by approximately 50%. These results suggest that ginsenoside $Rb_1$ has potential for use as a therapeutic agent in OA patients.
김미영,김영수,신용운,권계숙,김범수,문희용,조현근,김대혁 대한소화기내시경학회 1998 Clinical Endoscopy Vol.18 No.3
Angiodysplasia is probably responsible for 2.6-6.2% of cases involving of lower gastrointestinal bleeding and 1.2-8.0% of cases involving hemorrhages from the upper GI tract. Small bowel neoplasia is rare, accounting for about 5% of gastrointestinal tumors overall and 2-3% of all malignacies. The third most common malignany of the small bowel is the sarcoma, of which the leiomyosarcoma is the most frequent. A 54-year-old male patient was admitted with the chief complaints of dizziness and headache during 2 months. Laboratory findings revealed iron deficiency anemia. A superior mesenteric arteriography found an intensive vascular stained mass in the hepatic flexure. A celiac artery angiography discovered a irregulary vascular stained lesion in the Ll vertebral level. A colonoscopy located a 10 mm sized angiodysplasia in the right colon. According to these findings, we presumed that these lesions are a colonic angiodysplasia and a suspicious duodenal lesion. The operation was perfomed. The final diagnosis was a colonic angiodysplasia combined with leiomyosarcoma of the duodenum. The rarity of this case is emphasized and the literative reviewed.
Kim, Da Eun,Cho, Sung Woon,Kim, Young Been,Kim, Kyung Su,Yoon, Dea Ho,Jung, Sung Hyun,Kang, Won Jun,Cho, Hyung Koun Elsevier 2017 Ceramics international Vol.43 No.12
<P><B>Abstract</B></P> <P>The electrical and chemical stability of solution-processed indium zinc oxide (IZO) channel thin-film transistors (TFTs) were engineered via a synergistic approach of annealing duration and self-combustion process. In particular, the amorphous IZO TFTs that were thermally treated at 400°C for 3h using the specific precursor combination to generate internal self-combustion energy showed the best electrical performance [high saturation mobility (<I>μ</I> <SUB>SAT</SUB>)=2.7cm<SUP>2</SUP>/Vs] and stability [low threshold voltage shift (Δ<I>V</I> <SUB>TH</SUB>) under positive bias stress of 10.5V] owing to the formation of oxide films with excellent metal–oxide–metal (M–O–M) bonds, fewer impurities, and an amorphous phase compared to IZO TFTs using other precursor formulas and annealing times. Longer annealing times led to a saturated M–O bond ratio and crystallization via extreme thermal annealing, which induced electrical degradation (low <I>μ</I> <SUB>SAT</SUB> and high Δ<I>V</I> <SUB>TH</SUB>) of IZO TFTs. In the wet chemical patterning of electrodes, conventional acidic and basic wet etchants cause severe damage to the surfaces of the IZO channels; thus, insufficiently annealed IZO TFTs exhibited considerable degradation in terms of their on-current level and mobility. Alternatively, the TFTs subjected to an excessively long-term thermal annealing showed only a moderate decrease in mobility with the formation of small nanocrystals.</P>
Kim, Dae Hun,Lee, Young Hun,Lee, Dea Uk,Kim, Tae Whan,Kim, Sungwoo,Kim, Sang Wook Optical Society of America 2012 Optics express Vol.20 No.10
<P>High-efficiency organic photovoltaic (OPV) cells utilizing a poly(3-hexylthiophene) (P3HT) pillar layer containing ZnSe quantum dots (QDs) were fabricated by using a mixed solution method. Scanning electron microscopy and high-resolution transmission electron microscopy images showed that the ZnSe QDs were dispersed in the P3HT layer. The power conversion efficiency of the OPV cells with a P3HT pillar layer containing ZnSe QDs was as much as 100% higher than that of the OPV cells with a planar layer due to an enhancement of the photon-harvesting ability of the congregated P3HT particles containing ZnSe QDs and to an increase of the interfacial region for efficient charge transport.</P>
Fringe-Field Switching (FFS) 모드의 유전율 이방성의 부호에 따른 전기광학 특성 연구
김대형 ( Dea Hyung Kim ),장인원 ( In Won Jang ),임영진 ( Young Jin Lim ),유일수 ( Il Soo Yoo ),김기현 ( Gi Heon Kim ),김용해 ( Yong Hae Kim ),이승희 ( Seung Hee Lee ) 한국화상학회 2014 한국화상학회지 Vol.20 No.1
Fringe-Field Switching (FFS) 모드는 모든 고화질 액정디스플레이에 적용되고 있다. FFS 모드의 전기광학 특성은 전극 구조, 위상지연값, 러빙각, 셀갭, 액정의 유전율 이방성 (Δε) 크기 및 부호와 같은 셀 및 액정 변수에 따라 크게 의존한다. 본 연구에서는 FFS 모드에서 유전율 이방성의 부호가 다르지만 크기가 동일한 조건에서 FFS모드의 전기광학 특성을 연구하였다. 연구 결과에 의하면 전압 인가시 Δε 절대값이 같더라도 유전율 이방성이 음인 액정의 경우가 탄성변형이 용이해 유전율 이방성 양인 액정에 비해 구동 전압이 약 10% 정도 낮은 결과를 보여주었다. 이러한 결과는 FFS모드의 본질을 이해하는데 큰 도움을 준다고 확신한다. Recently, fringe field switching (FFS) mode in liquid crystal displays is mainly used for high image quality liquid crystal displays (LCDs). Electro-optic characteristics of FFS-LCDs liquid crystal (LC) depend on many cell parameters such as electrode structure, retardation, rubbing angle, cell gap and sign and magnitude of dielectric anisotropy. In this study, we have investigated electro-optic characteristics of the FFS mode as a function of a sign of dielectric anisotropy while keeping the magnitude of dielectric anisotropy of liquid crystals and other cell parameters to be the same. The results show that for the LC with negative dielectric anisotropy (-LC) shows lower operating voltage than that of a LC with positive dielectric anisotropy by about 10%, owing to easier elastic deformation responding to applied voltage in a -LC. The result will help understand the intrinsic switching behavior of the FFS mode.