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중성 운반체 선택성 막전극법에 의한 우라늄 금속의 연속정량
정오진,정경훈,김삼혁 조선대학교 환경연구소 1998 環境硏究 Vol.14 No.1
The equipments with which selective ions were able to determinated by ion selective membrane electrode method have been designed with the simole electronic circuits. Having made the selective neutral carrier membrance electrodes with PVC matrix, the response potentials of 〔UO^2+_2〕 were measured with the selective membrance electrode and all of equipments and treatment of data amalysis were operated, and obtained by using the personal computer programs. The neutral carrier membrane electrodes were made by mixing the neutral carriers (macrocyclic compounds and Cryptand), plasticizer(Aliquart 336, TOPO, and TBP) and matrix(PVC). These neutral carrier membrane electrodes showed a linear potential response to the activities of UO^2+_2)(10-2-10-6M). The neutral carrier selective membrane electrodes for UO^2+_2 and equipment for analysis of selective ions mentioned above were stable and reproducible for a long time use, and the selective coefficients for 〔UO^2+_2〕 were increased in proportion to the formation constants of metal complexes with neutral carrier ligands.
중성 운반체 선택성 막전극법에 의한 우라늄 금속의 연속정량
정오진,정경훈,김삼혁 조선대학교 환경공해연구소 1998 環境公害硏究 Vol.14 No.-
The equipments with which selective ions were able to determinated by ion selective membrane electrode method have been designed with the simole electronic circuits. Having made the selective neutral carrier membrance electrodes with PVC matrix. the response potentials of ??O^(2+)_(2)??were measured with the selective membrance electrodes and all of equipments and treatment of data amalysis were operated, and obtained by using the personal computer programs. The neutral carrier membrane electrodes were made by mixing the neutral carriers (macrocyclic compounds and Cryptand), p1asticizer(A1iquart 336, TOPO, and TBP) and matrix(PVC). These neutral carrier membrane electrodes showed a linear potential response to the activities of UO^(2+)_(2)(10-2-10-6M). The neutral carrier selective membrane electrodes for UO^(2+)_(2) and equipment for analysis of selective ions mentioned above were stable and reproducible for a long time use, and the selective coefficients for ??O^(2+)_(2)??were increased in proportion to the formation constants of metal complexes with neutral carrier ligands.
Helicobacter pylori 감염이 있는 환자의 배우자에서의 감염빈도와 임상적 의의
김학양,유재영,박충기,김종혁,김용범,장웅기,김재삼,박수종 대한소화기학회 1998 대한소화기학회지 Vol.31 No.6
Background/Aims; The transmission mode of Helicobaeter pylori infection has not been definded. We investigated the seroprevalence of H. pylori infection in spouses of infected patients to clarify the transmission mode of H. pylori infection, Methods: Sera were collected from 26 spouses of infected patients and examined for H. pylori infection by serology. We compared the antibody responses to H. pylori proteins (CagA, VacA and urease subunits) in 5 couples. Results: H. pylori infection was observed in 20 out of 26 spouses (77%). The infection rate was increased from 50% in less than 10 years of cohabitation to 100% in more than 31 years of cohabitation. The gastroscopic exarnination for the infected patients revealed chronic gastritis in 6, gastric ulcer in 9, duodenal ulcer in 8, concurrent gastric and duodenal ulcer in 2, and gastric cancer in 1. In spouses, the gastroscopy showed chronic gastritis in 10 and pyloric canal ulcer with H. pylori infection in 1. The couple with pyloric canal ulcer showed similar antibody responses to CagA, VacA and urease subunits. Conclusions: This study suggested that H. pylori might be transmitted via oral to oral route. Further study about the risk of gastroduodenal lesion in spouses is needed.
( Gi Hyun Kim ),( Jung Wha Chung ),( Jong Ho Lee ),( Kyeong Sam Ok ),( Eun Sun Jang ),( Jaihwan Kim ),( Cheol Min Shin ),( Young Soo Park ),( Jin Hyeok Hwang ),( Sook Hyang Jeong ),( Nayoung Kim ),( D 대한간학회 2015 Clinical and Molecular Hepatology(대한간학회지) Vol.21 No.4
Background/Aims: Vitamin E improves the biochemical profiles and liver histology in nonalcoholic steatohepatitis, but the role of vitamin E is not clearly defined in the management of nonalcoholic fatty liver disease (NAFLD) which includes both simple steatosis and steatohepatitis. Co-morbid metabolic syndrome increases the probability of steatohepatitis in NAFLD. In this study, we aimed to determine the short-term effects of vitamin E and off-treatment durability of response in a propensity-score matched cohort of NAFLD patients with metabolic syndrome. Methods: A retrospective cohort was constructed by retrieving 526 consecutive NAFLD patients from the electronic medical record data warehouse of a tertiary referral hospital in South Korea. Among them, 335 patients (63.7%) had metabolic syndrome and were eligible for vitamin E therapy. In order to assess the effect of vitamin E, propensity score matching was used by matching covariates between control patients (n=250) and patients who received vitamin E (n=85). Results: The PS-matched vitamin E group (n=58) and control group (n=58) exhibited similar baseline metabolic profiles. After 6 months of vitamin E therapy, the mean ALT levels decreased significantly compared to PS-matched control (P<0.01). The changes in metabolic profiles (body weight, lipid and glucose levels) did not differ between control and vitamin E groups during the study period. Conclusions: Short-term vitamin E treatment significantly reduces ALT levels in NAFLD patients with metabolic syndrome, but metabolic profiles are not affected by vitamin E. (Clin Mol Hepatol 2015;21:379-386)