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Lanthanide-Activated Fiber Materials for Broadband Optical Amplifiers

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光学学报 2003年第S1期23卷 74-75页

作者： yong gyu choi Bong Je Park Doo Hee Cho Hong Seok Seo Myung Hyun Lee Kyong Hon Kim Electronics and Telecommunications Research Institute (ETRI) Daejeon Republic of Korea

Some intra-4/-configurational transitions of lanthanide, of which radiative emissions cover in wavelengths the optical communication window of the currently available OH-free silica-based line fibers, are discussed in... 详细信息

关键词： Optical Amplifiers optical communication emission properties

DA-9601 for erosive gastritis:Results of a double-blind placebo-controlled phase Ⅲ clinical trial

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World Journal of Gastroenterology 2004年第16期10卷 2379-2382页

作者： Sang yong Seol Myung Hwan Kim Jong Sun Ryu Myung gyu choi DongWookShin ByoungOkAhn Department of Gastroenterology Inje University of MedicineBusanKorea Department of Gastroenterology Ulsan University of MedicineSeoulKorea Department of Gastroenterology Chunnam University of MedicineGwangiuKorea Department of Gastroenterology Catholic University of MedicineSeoulKorea Dong-A Pharmaceutical Research Institute YonginKorea

AIM: To determine the efficacy and safety of DA-9601 on erosive gastritis versus cetraxate as a standard drug by gastrointestinal ***: Five hundred and twelve patients with erosive gastritis were divided into three groups. The groups received 180 mg or 360 mg of DA-9601, or 600 mg of cetraxate (Neuer^TM) t.i.d, for 2 wk, respectively. Endoscopic observations were performed before and 2 wk after the treatment, and the cure and improvement rates were ***: Of the 512 intention-to-treat (ITT) population,457 patients comprised the per protocol (PP) *** cure rate was significantly higher in the DA-9601 group than in the cetraxate group in both the PP (56%, 58% vs 36% DA-9601 180 mg, 360 mg and cetraxate,respectively) and ITT (52%, 51% vs 35%) *** DA-9602 groups (280 and 360 mg) had significantly higher endoscopic improvement rates than the cetraxate group in both the PP (67%, 65% vs 46%) and In (63%,58% vs 45%) populations. The percentage of symptom relief over the 2 wk was found not significantly different between groups. During the study, both DA-9602 and cetraxate produced no treatment-associated adverse ***: From these results, it appears that DA-9601 has excellent efficacy on erosive gastritis. This study also confirms the safety profile of DA-9601.

关键词： DA-9601 腐蚀性胃炎安慰剂临床实验 Ⅲ阶段内窥镜

Effect of itopride, a new prokinetic, in patients with mild GERD: A pilot study

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World Journal of Gastroenterology 2005年第27期11卷 4210-4214页

作者： yong Sung Kim Tae Hyeon Kim Chang Soo choi Young Woo Shon Sang Wook Kim Geom Seog Seo yong Ho Nah Myung gyu choi Suck Chei choi Department of Internal Medicine

AIM： Itopride is a newly developed prokinetic agent, which enhances gastric motility through both antidopaminergic and anti-acetylcholinesterasic actions. The importance of esophageal motor dysfunction in the pathogenesis of gastro-esophageal reflux disease （GERD） makes it interesting to examine the effect of itopride on esophageal acid ***： The effect of itopride on esophageal acid reflux variables for 24 h was studied in 26 patients with GERD symptoms, pre-entry total acid exposure time （pH〈4） of more than 5% and mild esophagitis （SavaryMiller grades I, II） proven by endoscopy. Ambulatory 24hpH-metry and symptom assessment were performed after treatments with 150 or 300 mg itopride thrice a day （t.i.d.） for 30 d in random order, using an open label *** evaluating the safety of itopride, blood biochemical laboratory test was performed and the serum prolactin level was also examined before and after ***： Total symptom score was significantly decreased after treatment in 150- or 300-mg group. Itopride 300 mg was significantly effective than 150 mg on decreasing the total per cent time with pH〈4, total time with pH〈4 and DeMeester score. No serious adverse effects were observed with administration of itopride in both ***： Itopride 100 mg t.i.d, is effective on decreasing pathologic reflux in patient with GERD and therefore it has the potential to be effective in the treatment of this disease.

关键词： Gastro-esophageal reflux disease Itopride

Retroperitoneal desmoplastic small round cell tumor:Pediatric patient treated with multimodal therapy

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World Journal of Gastroenterology 2009年第33期15卷 4212-4214页

作者： yong Seok Kim Seong Jae Cha Yoo Shin choi Beom gyu Kim Sung Jun Park In Taik Chang Department of Surgery College of MedicineChung-Ang University

A desmoplastic small round cell tumor (DSRCT) is a rare, aggressive mesenchymal neoplasm. Although a DSRCT can develop at various sites, the intraabdominal site is the most common location. These tumors are found most commonly among young adolescents and the prognosis is extremely poor. Multimodal treatment with surgery, chemotherapy and radiotherapy is very important for these rare cases, and this treatment can improve patient survival. In this report, we describe the case of an 8-year-old boy diagnosed with DSRCT located in the retroperitoneal space. The patient has undergone surgical resection and adjuvant chemoradiation therapy, and is currently alive without disease recurrence.

关键词： Retroperitoneum Desmoplastic small round cell tumor Multimodal therapy

Groundwater contamination and natural attenuation capacity at a petroleum spilled facility in Korea

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Journal of Environmental Sciences 2011年第10期23卷 1650-1659页

作者： Hyun-Mi choi Jin-yong Lee Department of Geology Kangwon National University

As a remedial option, the natural attenuation capacity of a petroleum contaminated groundwater at a military facility was examined. Hydrogeological conditions, such as high water level, permeable uppermost layer and frequent heavy rainfall, were favorable to natural attenuation at this site. The changes in the concentrations of electron acceptors and donors, as well as the relevant hydrochemical conditions, indicated the occurrence of aerobic respiration, denitrification, iron reduction, manganese reduction and sulfate reduction. The calculated BTEX expressed biodegradation capacity ranged between 20.52 and 33.67 mg/L, which appeared effective for the reduction of the contaminants levels. The contribution of each electron accepting process to the total biodegradation was in the order： denitrification 〉 iron reduction 〉 sulfate reduction 〉 aerobic respiration 〉 manganese reduction. The BTEX and benzene point attenuation rates were 0.0058-0.0064 and 0.0005-0.0032 day-1, respectively, and the remediation time was 0.7-1.2 and 2.5-30 years, respectively. The BTEX and benzene bulk attenuation rates were 8.69 × 10^-4 and 1.05 × 10^-3 day-l, respectively, and the remediation times for BTEX and benzene were 7.2 and 17.5 years, respectively. However, most of the natural attenuation occurring in this site can be attributed to dilution and dispersion. Consequently, the biodegradation and natural attenuation capacities were good enough to lower the contaminants levels, but their rates appeared to be insufficient to reach the remediation goal within a reasonable time frame. Therefore, some active remedial measures would be required.

关键词： petroleum contaminated site BTEX electron acceptor expressed biodegradation capacity natural attenuation

Helicobacter pylori infection is not associated with nonalcoholic fatty liver disease

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World Journal of Gastroenterology 2016年第8期22卷 2592-2600页

作者： Myong Ki Baeg Seung Kew Yoon Sun-Hye Ko yong-Sun Noh In-Seok Lee Myung-gyu choi Department of Internal Medicine The Catholic University of Korea College of Medicine

AIM: To determine whether Helicobacter pylori (H. pylori) infection confers a higher risk of Nonalcoholic fatty liver disease (NAFLD).METHODS: Healthy people who underwent health screening were analyzed retrospectively. Inclusion criteria were age ≥ 20 years, history of H. pylori infection, and recorded insulin level. Participants were classified as H. pylori positive or negative according to 13C urea breath tests. NAFLD was defined using the hepatic steatosis index (HSI) and NAFLD liver fat score (NAFLD-LFS). Those with an HSI > 36 or NAFLD-LFS > -0.640 were considered to have NAFLD. Multivariable logistic regression was performed to identify risk factors for ***: Three thousand six hundred and sixty-three people were analyzed and 1636 (44.7%) were H. pylori positive. H. pylori infection was associated with older age, male gender, hypertension, higher body mass index, and a dyslipidemic profile. HSI differed significantly between H. pylori positive and negative subjects (median 33.2, interquartile range (IQR) 30.0-36.2 for H. pylori-positive vs median 32.6, IQR 29.8-36.0 for negative participants, P = 0.005), but NAFLD-LSF did not [median -1.7, IQR -2.4 - -0.7 vs median -1.8, IQR -2.4-(-0.7), respectively, P = 0.122]. The percentage of people with NAFLD did not differ between infected and uninfected groups: HIS, 26.9% vs 27.1%, P = 0.173; NAFLD-LFS, 23.5% vs 23.1%, P = 0.778. H. pylori infection was not a risk factor, but C-reactive protein concentration and smoking were significant risk factors for ***: H. pylori infection is not a risk factor for NAFLD as indicated by HSI or NAFLD-LFS. Prospective, large-scale studies involving liver biopsies should be considered.

关键词： Helicobacter pylori Nonalcoholic fatty liver disease Hepatic steatosis index Nonalcoholic fatty liver disease liver fat score Urea breath test

Preoperative colonoscopy through the colonic stent in patients with colorectal cancer obstruction

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World Journal of Gastroenterology 2014年第30期20卷 10570-10576页

作者： Jin Su Kim Kang Moon Lee Sang Woo Kim Eun Jung Kim Chul Hyun Lim Seong Taek Oh Myung gyu choi Kyu yong choi Division of Gastroenterology Department of Internal MedicineCatholic University of Korea College of MedicineSeoul 137-701South Korea Department of surgery Catholic University of Korea College of MedicineSeoul 137-701South Korea

AIM: To evaluate the feasibility of a preoperative colonoscopy through a self-expendable metallic stent (SEMS) and to identify the factors that affect complete colonoscopy.

关键词： Colon cancer Stent Preoperative colonoscopy Complete colonoscopy

Black esophagus with concomitant candidiasis developed after diabetic ketoacidosis

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World Journal of Gastroenterology 2007年第42期13卷 5662-5663页

作者： yong Hwan Kim Si Young choi Department of Thoracic and Cardiovascular Surgery Uijeongbu St. Mary's Hospital The Catholic University of Korea College of Medicine Seoul 480-821 Korea Department of Thoracic and Cardiovascular Surgery Uijeongbu St. Mary’s Hospital The Catholic University of Korea College of Medicine Seoul 480-821 Korea

Black esophagus is a very rare disease and its pathogenesis has been *** esophagus developed concomitantly with candidiasis after diabetic ketoacidosis has not been reported *** report a case who developed esophageal stricture after the treatment of black esophagus and thus balloon dilatation was performed several times but failed,hence,surgical treatment was performed.

关键词： Esophagus Candidiasis Diabetic ketoacidosis Surgery

Limsup Results and LIL for Partial Sum Processes of a Gaussian Random Field

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Acta Mathematica Sinica,English Series 2008年第9期24卷 1497-1506页

作者： yong-Kab choi Mikls CSRG Department of Mathematics and RINS Gyeongsang National University Jinju 660-701 Republic of Korea School of Mathematics and Statistics Carleton University 1125 Colonel By DriveOttawa K1S 5B6 Canada

Let {ξ j ; j ∈ ℤ+ d be a centered stationary Gaussian random field, where ℤ+ d is the d-dimensional lattice of all points in d-dimensional Euclidean space ℝd, having nonnegative integer coordinates. For each j = (j 1 , ..., jd) in ℤ+ d , we denote |j| = j 1 ... j d and for m, n ∈ ℤ+ d , define S(m, n] = Σ mζ j , σ2(|n−m|) = ES 2 (m, n], S n = S(0, n] and S 0 = 0. Assume that σ(|n|) can be extended to a continuous function σ(t) of t > 0, which is nondecreasing and regularly varying with exponent α at b ≥ 0 for some 0 < α < 1. Under some additional conditions, we study limsup results for increments of partial sum processes and prove as well the law of the iterated logarithm for such partial sum processes.

关键词： stationary Gaussian random field regularly varying function large deviation probability law of the iterated logarithm