여성요도구협착의 수술적 교정

오범석,김도완,오철규,노안식,박석산 白中央醫療院 2005 仁濟醫學 Vol.26 No.1

Objective: We describe various clinical presentations of female urethral meatal stricture, which may mimic other pelvic floor disorders and result in diagnostic delay. Diagnosis, management, and outcome results are reported Materials and Methods: We reviewed retrospectively 26 consecutive cases of female urethral meatal stricture. Patient characteristics, history, clinical presentation, symptom score, maximal flow rate, residual urine, diagnosis, management and short-term follow up are reported. Results: Mean patient age plus or minus standard deviation was 54 years. Most 21 (81%) cases were referred as diagnostic dilemmas with symptoms present for 1 month to 30 years. Mean interval between onset of symptoms to diagnosis was 5.8 years. The most common symptoms were residual urine sensation (77% of cases), frequency (54%), pelvic pain (46%), dysuria (46%), weak stream urine (27%), urgency (15%) and 17 patients (65%) have combined symptoms. 16 patients (62%) had been treated with oral and/or vaginal medication and/or psychotherapy. The female urethral meatal stricture was visible on physical examination in 21 patients (81%) and cystoscopy in 5 patients (19%). Of these visible urethral meatal stricture, 11 patients (45%) contained recurrent urinary tract infection, 9 patients (35%) contained urethral mucosal prolapse, 7 patients (27%) contained urethral diverticulum, and 3 patients (12%) contained stress urinary incontinence. 18 patients (69%) who has been treated with oral and/or vaginal medication or psychotherapy was not successfully improved. Treatment consist of urethral meatal excision and/or everted urethral mucosal excision and/or urethral diverticulum excision and/or anti-incontinence surgery when indicated. Subsequently 24 patients (92%) had improved symptom score, but 2 patient was not changed. In 9 patients new symptom developed. Conclusions: Female urethral meatal stricture have several urinary symptoms and may mimic other pelvic floor disorders. This condition should be considered in women with frequency, residual urine sensation, pelvic pain, dysuria and etc. Medical treatment is not sufficient but surgical treatment is usually simple, safe and effective in alleviation associated symptoms.

회전자 구조에 따른 SRM의 토오크 특성해석

정도영,이상호,서진우,오홍석,최경호 三陟大學校 1997 論文集 Vol.30 No.1

The switched reluctance motor(SRM) has a simple rotor construction with no windings. It also has simple concentrated windings on the stator. Thus, it is expected to be a lower cost machine to manufacture than the squirrel cage induction motor. This paper presents an advanced rotor structure type, well-round rotor type in SRM. To design the improved SRM we have used FEM and studied and compared with each other. The static torque, instantaneous torque and average torque are more improved than that of typical rotor type which has been a lot of used for SRM.

Maillard 反應에 關한 硏究 : Ⅲ. 아미노산과 5炭糖의 Maillard 反應 Ⅲ. Study on the Maillard Browing of Amino acids and Pentoses

李乙熙,崔相道,吳錫斗,高鏡畢 진주산업대학교 농업기술연구소 1991 農業技術硏究所報 Vol.4 No.-

아미노산과 5炭糖을 121℃에서 15분간 열처리하여 Maillard반응의 發色强度를 비교한 결과는 다음과 같다. 1. 아미노산은 發色强度가 높은것, 중간것, 낮은것으로 대별되었다. 2. 糖은 L(+)arabinose, D(-)-ribose, D(+)-xylose 순으로 發色强度가 높게 나타났다. 3. pH차이에 따른 영향은 反應液의 pH가 높아질수록 反應性은 增加되었다. 4. D(+)-xylose, D(-)-ribose 및 L(+)-arabinose의 농도가 높아질 수록 반응성은 높게 나타났다. Common amino acids and pentoses have been ranked acording to the intensity of Maillard browning formed when heated in an autoclave at 121℃ for 15 min. The results obtained as follows; 1. The amino compounds have been groupeed into high, intermediate and low browning producing groups. 2. The color intensity of pentoses tested was xylose>ribose>arabinose. 3. As the pH values of reaction solutions increased, the color intensity of melanoidins. 4. As the concentrations of xylose, ribose and arabinose increased, the color intensities of melanoidins.

노인에서 내피의존성 혈관반응에 대한 비타민 C의 효과에 대한 연구

온영근,김용석,오도연,최진호,황의석,김철호 대한노인병학회 2001 Annals of geriatric medicine and research Vol.5 No.1

Catalytic activity enhancement of a Fe₃O₄@SiO₂ yolk-shell structure for oxidative degradation of acetaminophen by decoration with copper

Do, Quoc Cuong,Kim, Do-Gun,Ko, Seok-Oh Elsevier 2018 JOURNAL OF CLEANER PRODUCTION Vol.172 No.-

<P><B>Abstract</B></P> <P>The occurrence of pharmaceuticals in the environment has received wide attention, and they have recently been considered as emerging organic contaminants. Since conventional wastewater processes are not particularly effective, the development of new technology that can completely remove pharmaceutical compounds in aquatic environments is an urgent need. Recently, iron-copper bimetallic catalysts have attracted increasing attention, and they are known as good Fenton reagents for the degradation of persistent organic pollutants. In this study, yolk-shell structured Fe<SUB>3</SUB>O<SUB>4</SUB>@SiO<SUB>2</SUB> was prepared via a spontaneous self-transformation process, and it was decorated with copper nanoparticles (Fe<SUB>3</SUB>O<SUB>4</SUB>@SiO<SUB>2</SUB>@Cu) to produce a novel catalyst aimed at the rapid catalytic oxidation of acetaminophen in the heterogeneous Fenton reaction. Different ratios of Fe<SUB>3</SUB>O<SUB>4</SUB> and copper were obtained by varying the precursor amounts of yolk-shell and copper salt. The catalyst properties were characterized by several techniques to verify the successful synthesis of the targeted materials. The results demonstrated that the Fe<SUB>3</SUB>O<SUB>4</SUB>@SiO<SUB>2</SUB>@Cu was controllably prepared, copper nanoparticles were firmly immobilized on the mesoporous silica shell, and the decoration of copper did not impact the yolk-shell structure of the precursor material. The catalytic activity of Fe<SUB>3</SUB>O<SUB>4</SUB>@SiO<SUB>2</SUB>@Cu was much better than that of Fe<SUB>3</SUB>O<SUB>4</SUB>@SiO<SUB>2</SUB> for the degradation of acetaminophen. The catalytic performance of Fe<SUB>3</SUB>O<SUB>4</SUB>@SiO<SUB>2</SUB>@Cu increased with increasing copper content. Radical scavenging studies showed that •OH is the main reactive species contributing to acetaminophen degradation. In addition, the catalyst also exhibited good separation and satisfactory regeneration properties. The decoration of copper nanoparticles onto the yolk-shell structure Fe<SUB>3</SUB>O<SUB>4</SUB>@SiO<SUB>2</SUB> was proved to be an attractive alternative method to obtain a novel bimetallic catalyst applied in heterogeneous Fenton-like system for the removal of persistent pharmaceuticals from wastewater.</P> <P><B>Graphical abstract</B></P> <P>[DISPLAY OMISSION]</P>

Reconfigurability 기술을 적용한 하향링크 WCDMA 및 cdma2000 방식의 이중모드 DLL 설계

오춘석(Chun-Seok Oh),도주현(Joo-Hyun Do),강형욱(Hyung-Wook Kang),김용석(Yong-Seok Kim),최형진(Hyung-Jin Choi) 한국통신학회 2003 한국통신학회 학술대회논문집 Vol.2003 No.7

해상 가두리 양식장 다중 모니터링 시스템에 대한 연구

오진석(Jin-Seok Oh),김연형(Yun-hyung Kim),곽준호(Jun-ho Kwak),이종호(Jong-Ho Lee),최훈석(Hoon-seok Choi),김종도(Jong-do Kim) 한국마린엔지니어링학회 2006 한국마린엔지니어링학회 학술대회 논문집 Vol.2006 No.-

Ammoniac nitrogen excretion is not able to be removed in ocean fish farm, It is the min reason for fish being dead in large quantities or declining feeding activity that ammoniac nitrogen is not removed efficiently in ocean fish farm. Because of declining with feeding activity, it is true that feed is wasted for the present. To solve this problem, NH₃?, dissolved oxygen, temperature, ph which are environment factors in ocean fish farm, monitoring system is suggested to be farmed in this paper.

열차운행효율화를 위한 운전관계 사규에 대한 연구

오민석(Min-Seok Oh),김호순(Ho-Soon Kim),정도원(Do-Won Jeong) 한국철도학회 2010 한국철도학회 학술발표대회논문집 Vol.2010 No.7

Railway is facing a new era by the remarkable technology-intensive development of railways in the rolling stock and track, trains and infrastructure facilities. But the relevant provisions of the regulations for the various driving speed limit accept most of the past rules and it is desperately needed to realize the efficiency of the train operation. In addition, because the rules that drive too many treats of redundancy(the same information is duplicated in the other company policy provisions), they can cause confusion among employees, and also because of the contents of the detailed provisions dealing with almost same regulations, they can cause probable failure and big accident. In this study, the relevant provisions of the current rules are analyzed and overcome problems to improve efficiency and duplicated contents of relevant provisions to drive trains are merged. Also by reorganization of complex speed limits, we can understand easily when even the unusual situation and make a simple decision to prevent accidents. As a result, we can establish the system by doing subsequent actions quickly and accurately.

제초제 저항성 논잡초 발생동향

이인용(Lee In-Yong),박중수(Jung-Soo Park),서영호(Young-Ho Seo),김은정(Eun-Jung Kim),이순계(Sun-Gye Lee),조승현(Seng-Hyun Cho),권오도(Oh-Do Kwon),김상국(Sang-Kuk Kim),정완규(Wan-Gyu Chung),박태선(Tae-Seon Park),김창석(Chang-Seok Kim) 韓國雜草學會 2012 Weed&Turfgrass Science Vol.32 No.2

제초제 저항성 논잡초 발생면적은 농촌진흥청 국립농업과학원과 전국 8개 도 농업기술원과 공동으로 조사하였다. 8개 도 농업기술원에서 2011년 8월에 논토양을 채취하여 피라조설퓨론에틸 피리미노박메틸입제를 30kg ha-1 처리하여 설포닐우레아(SU)계 제초제 저항성 논잡초의 발생면적을 추산하였다. 전국 벼 재배면적(유기 및 친환경농업 벼 재배면적 제외)의 20.9%인 167,081ha에서 SU계 저항성 논잡초가 발생되고 있음을 확인하였다. 2008년과 대비하여 본 결과 60,130ha가 늘어났다. 발생비율을 보면, 충청남도가 논 면적의 47.6%로 제일 많이 발생되었고, 그 다음으로는 전라남도로 36.9%, 충청북도 25.7%, 강원도 20.3%, 경기도 13.0% 순이었다. 제초제 저항성 논잡초 중 발생면적이 가장 넓은 초종은 물달개비로서 65,313ha로 전체 39.1%를 차지하였으며, 그 다음으로 올챙이고랭이, 알방동사니 순이었다. 이들 3초종은 전국적으로 고르게 발생하여 제일 문제되는 잡초들이다. 그리고 미국외풀 13,964ha(8.4%), 강피 5.1%이었다. National Academy of Agricultural Science and eight province Agricultural Research & Extension Services investigated the occurring area of herbicide resistant weeds in paddy field of Korea. In order to estimate the occurring areas of herbicide resistant weeds, we collected paddy soils on August, 2011 and treated 30kg $ha^{-1}$ of pyrazosulfuron-ethyl+pyriminobac-methyl GR. 167,081ha, approximately 20.9% of cultivated area excluding organic and eco-friendly cultivated area, was estimated to be infested by SU-herbicide resistant paddy field weeds. It was increased by 60,130ha compared with investigation of 2008. It was occurred at Chungchungnam-do by 47.6%, followed by 36.9% at Jeonranam-do, 25.7% at Chungchungbuk-do, 20.5% at Gangwon do, and 13.0% at Gyeonggi-do, respectively. Monochoria vaginalis showed the highest with 65,313ha, 39.1% followed by Scirpus juncoides, and Cyperus difformis, respectively. These three species were evenly distributed and the most problematic weeds in the country. Lindernia dubia occurred at 13,964ha (8.4%) and Echinochloa oryzicola was 5.1%, respectively.

Transformation of Mouse Liver Cells by Methylcholanthrene Leads to Phenotypic Changes Associated with Epithelial-mesenchymal Transition

Oh, Jiyun,Kwak, Jae-Hwan,Kwon, Do-Young,Kim, A-Young,Oh, Dal-Seok,Je, Nam Kyung,Lee, Jaewon,Jung, Young-Suk Korean Society of ToxicologyKorea Environmental Mu 2014 Toxicological Research Vol.30 No.4

Environmental pollutants such as polycyclic aromatic hydrocarbons (PAHs) have been implicated in cancer development and progression. However, the effects of PAHs on carcinogenesis are still poorly understood. Here, we characterized a mouse cancer cell line BNL 1ME A. 7R.1 (1MEA) derived by transformation of non-tumorigenic liver cell line BNL CL.2 (BNL) using 3-methylcholanthrene (3MC), a carcinogenic PAH. RT-PCR and immunoblot analysis were used to determine the expression level of mRNA and proteins, respectively. To determine functionality, cell motility was assessed in vitro using a transwell migration assay. Both mRNA and protein levels of E-cadherin were significantly decreased in 1MEA cells in comparison with BNL cells. While the expression levels of mesenchymal markers and related transcription factors were enhanced in 1MEA cells, which could lead to increase in cell motility. Indeed, we found that 7-day exposure of BNL cells to 3-MC reduced the level of the adhesion molecule and epithelial marker E-cadherin and increased reciprocally the level of the mesenchymal marker vimentin in a dose-dependent manner. Taken together, these results indicate that the process of epithelial-mesenchymal transition (EMT) may be activated during premalignant transformation induced by 3-MC. A mechanism study to elucidate the relation between 3-MC exposure and EMT is underway in our laboratory.