Publications by authors named "Cha I"

A taxonomic study was carried out on two bacterial strains, PCP11(T) and PCP104, isolated from a tidal flat of the Yellow Sea, Korea. Comparative 16S rRNA gene sequence studies showed that these strains belonged to the family Cytophagaceae, phylum Bacteroidetes. Strains PCP11(T) and PCP104 shared 99.

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This study aims to examine the thermodynamic feasibility of separating sulfur hexafluoride (SF(6)), which is widely used in various industrial fields and is one of the most potent greenhouse gases, from gas mixtures using gas hydrate formation. The key process variables of hydrate phase equilibria, pressure-composition diagram, formation kinetics, and structure identification of the mixed gas hydrates, were closely investigated to verify the overall concept of this hydrate-based SF(6) separation process. The three-phase equilibria of hydrate (H), liquid water (L(W)), and vapor (V) for the binary SF(6) + water mixture and for the ternary N(2) + SF(6) + water mixtures with various SF(6) vapor compositions (10, 30, 50, and 70%) were experimentally measured to determine the stability regions and formation conditions of pure and mixed hydrates.

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Background: Oral squamous cell carcinoma (OSCC) is caused by multiple factors, including carcinogen exposure. Insulin-like growth factor II mRNA-binding protein 3 (IMP3) is highly expressed in various cancer cells but is rarely expressed in normal cells. We investigated whether IMP3 can be used as a prognostic biomarker for OSCC.

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Artemisia capillaris has been used in traditional Korean medicine for its variety of pharmacological activities. Previous studies have suggested that the essential oil of A. capillaris has chemopreventive potential, even though the mechanism of its action is unclear.

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Array comparative genomic hybridization (aCGH) provides a genome-wide technique for identifying chromosomal aberrations in human diseases, including cancer. Chromosomal aberrations in cancers are defined as regions that contain an increased or decreased DNA copy number, relative to normal samples. The identification of genomic regions associated with systematic aberrations provides insights into initiation and progression of cancer, and improves diagnosis, prognosis, and therapy strategies.

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The present study was performed to elucidate the effects of itraconazole and rifampin on the pharmacokinetics and pharmacodynamics of ebastine, a nonsedative H1 receptor antagonist. In a 3-way crossover sequential design with 2-week washouts, 10 healthy participants were pretreated with itraconazole for 6 days, rifampin for 10 days, or neither. After oral administration of 20 mg ebastine, blood and urine samples were collected for 72 and 24 hours, respectively, and histamine-induced wheal and flare reactions were measured to assess the antihistamine response for 12 hours.

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Unlabelled: Bisphosphonate-related osteonecrosis of the jaw (BRONJ) is a serious side effect of bisphosphonate therapy. The incidence of BRONJ is known to be low among patients treated with oral bisphosphonates. We investigated the prevalence, demographics, clinical manifestations, and treatment outcome of 24 patients with oral BRONJ in Asian populations.

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A Gram-reaction-negative, non-motile, aerobic bacterium, designated HJ50(T), was isolated from deep seawater of the East Sea, South Korea. Cells were ovoid to rod-shaped (0.5-0.

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Cytochrome P450 3A7 (CYP3A7) is expressed in the human fetal liver and plays a role in the metabolism of hormones, drugs, and toxic compounds. Genetic variants of CYP3A7 are associated with serum estrone level, bone density, and hepatic CYP3A activity in adults. We analyzed the genetic variations of CYP3A7 in a Korean population.

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Lactococcus garvieae is an important etiological agent of lactococcosis in various fish species including olive flounder (Paralichthys olivaceus). In this study, proteomic and immunoproteomic analyses were employed to compare the antigenic profiles of strains KG9408, MS93003, and NSS9310 strains of L. garvieae.

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Transcatheter arterial chemoembolization is one of the most common treatment modalities for hepatocellular carcinoma. Transcatheter arterial chemoembolization is considered to be a relatively safe procedure, but transcatheter arterial chemoembolization is associated with a number of disastrous complications. Among the ischaemic complications caused by transcatheter arterial chemoembolization, spinal cord injury is very rare, but can occur via the intercostal or lumbar arteries.

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In the present study, we examined the active role of porous silica gels when used as natural gas storage and transportation media. We adopted the dispersed water in silica gel pores to substantially enhance active surface for contacting and encaging gas molecules. We measured the three-phase hydrate (H)-water-rich liquid (L(W))-vapor (V) equilibria of C(2)H(6) and C(3)H(8) hydrates in 6.

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Purpose: To analyze risk factors and the dose-effect relationship for osteoradionecrosis (ORN) of the mandible after radiotherapy of oral and oropharyngeal cancers.

Materials And Methods: One-hundred ninety-eight patients with oral (45%) and oropharyngeal cancer (55%) who had received external radiotherapy between 1990 and 2000 were retrospectively reviewed. All patients had a dental evaluation before radiotherapy.

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The etiological agents of streptococcosis were isolated from diseased olive flounder collected on the Jeju island of Korea. A total of 151 bacterial isolates were collected between 2003 and 2006. The isolates were examined using various phenotypic and proteomic analyses, including sodium dodecyl sulfate-polyacrylamide gel electrophoresis (SDS-PAGE), immunoblotting, and glycoprotein assays.

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The rates of antibiotic susceptibility and resistance were investigated in Streptococcus iniae and Streptococcus parauberis isolates obtained from diseased olive flounders (Paralichthys olivaceus) collected from fish farms in Jeju Island, Korea. Isolates of S. iniae (n=65) were susceptible to cefotaxime, erythromycin, ofloxacin, penicillin, tetracycline and vancomycin, as demonstrated by the minimum inhibitory concentration (MIC) test.

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Context: The staggering burden of myocardial infarction and stroke in men and for men of African-American descent in particular provided the impetus for this study. Morbidity and mortality from these vascular disorders can be reduced by early treatment, which requires correct prehospital identification of symptoms.

Objective: The purpose of this study was to assess current knowledge of myocardial infarction and stroke symptoms and to examine if there were disparities in knowledge of these among U.

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Purpose: To demonstrate the long-term treatment outcomes of endovenous laser ablation (EVA) of incompetent small saphenous veins (SSV) with a 980-nm diode laser.

Materials And Methods: Eighty-four patients (96 limbs), with varicose veins and reflux in the SSV on duplex ultrasound examination, were treated with a 980-nm diode laser under ultrasound- or fluoroscopy-guidance. Patients were evaluated at 1 week and 1, 3, 6 months, 1 year and yearly thereafter.

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Migration of an implantable port catheter tip is one of the well-known complications of this procedure, but the etiology of this problem is not clear. We describe here a case of migration of the tip of a port catheter from the right atrium to the right axillary vein in a patient with severe cough. Coughing was suggested for this case as the cause of the catheter tip migration.

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Carbonic anhydrase IX (CA9) is reportedly overexpressed in several types of carcinomas, but little is known about the expression pattern of CA9 in oral cavity cancer and the corresponding normal tissues. We aimed to assess the prevalence of CA9 expression and its prognostic implications in patients with oral cavity squamous cell carcinoma (SCC). Immunohistochemical staining with anti-CA9 antibody was performed in 117 oral SCC samples.

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Introduction: Daily cigarette smoking among US adolescents remains a significant public health problem. Understanding risk is important in order to develop strategies to reduce this type of tobacco use.

Purpose: The primary objective of this research was to examine whether rural residency is an independent risk factor for being a daily smoker among adolescents ages 12 to 18 years.

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Glucuronidation catalyzed by UDP-glucuronosyltransferases (UGTs) is one of the most important mechanisms for host defense against xenobiotics and endobiotics. Although genetic polymorphisms of several UGT1A isoforms have been reported separately, the haplotypes in all functional exons have not been identified, and little information is available regarding single nucleotide polymorphisms in Koreans. We analyzed genetic polymorphisms in all functional exons of the UGT1A locus by direct sequencing of genomic DNA from 50 healthy Korean subjects, and their haplotypes were inferred from genotype data using an expectation-maximization algorithm.

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Benidipine is a dihydropyridine calcium antagonist that has been used clinically as an antihypertensive and antianginal agent. It is used clinically as a racemate, containing the (-)-alpha and (+)-alpha isomers of benidipine. This study was performed to elucidate the metabolism of benidipine and its enantiomers in human liver microsomes (HLMs) and to characterize the cytochrome P450 (P450) enzymes that are involved in the metabolism of benidipine.

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