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Imipenem 내성 Pseudomonas aeruginosa의 분리 현황과 내성 획득 기전
윤외숙,이보영,배일권,권수봉,정석훈,정태전,정연욱 대한임상미생물학회 2005 Annals of clinical microbiology Vol.8 No.1
Background: Spread of imipenem-resistant Pseudomonas aeruginosa isolates is an important clinical threat. The aim of this study is to survey the prevalence of carbapenem-resistant P. aeruginosaisolates in a university hospital, Busan, Korea, and to determine the mechanisms of the resistance. Methods: P. aeruginosa isolates from the patients in Kosin University Gospel Hospital were collected during the period of June through September, 2004. Antimicrobial susceptibilities were tested by the disk diffusion method, and production of carbapenemase and metallo-β-lactamase was determined by the modified Hodge and EDTA-disk synergy tests, respectively. MICs were determined by the agar dilution method, and pIs of β-lactamases were determined by the isoelectric focusing. Genotypes of carbapenemases were determined by direct sequencing of amplified products. Results: A total of 77 clinical isolates of P. aeruginosa were collected. Twenty-two (55.0%) and 15 (37.5%) isolates showed positive results in the modified Hodge and EDTA-disk synergy tests, respectively. Searches for blaOXA-23 and blaIMP-1 genes showed positive results in 15 and 12 isolates, respectively. MIC ranges of imipenem and meropenem to OXA-23-producing isolates were 8-16 ㎍/mL and 2-32 ㎍/mL, respectively, and those to IMP-1-producing isolates were 2-≥256 ㎍/mL and 2-128 ㎍/mL, respectively. Conclusion: Production of OXA-23 or IMP-1 is the most prevalent mechanism of imipenemresistance in P. aeruginosa isolates in a university hospital, Busan, Korea. Periodical surveys are necessary to monitor the spreading of imipenem-resistant isolates and emerging new mechanisms of imipenem-resistance.
연구논문 : 울금 분말 첨가가 매작과의 품질특성 및 항산화에 미치는 영향
최수남 ( Soo Nam Choi ),윤수봉 ( Soo Bong Youn ),유승석 ( Seung Seok Yoo ) 한국식품조리과학회(구.한국조리과학회) 2012 한국식품조리과학회지 Vol.28 No.2
This study was carried out for the purpose of inquiring into the effects on shelf-life, quality characteristics and antioxidative activities of Majakgwa with regard to the use turmeric powder at varying concentrations in the recipe. Chemical composition analysis showed that the contents of crude fat, crude protein and carbohydrates are high in turmeric powder. With an increase of the amount of turmeric powder used in Majakgwa recipes, dough pH was higher than that of the control group. Antioxidative activities were the highest in the groups with 3% and 9% turmeric powder content, and the value increased largely after 12 days of storage. Excellent antioxidative activities were observed in the 6% turmeric content group. For recipes with turmeric contents of more than 15%, oxidation was accelerated from early on in storage. The hardness, brittleness and bitterness increased significantly with the increase of the turmeric content. The intensity, chromaticity, crunch and intensity of the surface colors, all increased significantly with the increase of turmeric content . The general preference ratings for Majakgwa with added turmeric was highest for the 9% content recipe. Over all Majakgwa recipes with 6~9% turmeric powder content were found to ideal.
커패시터 放電 임펄스 着磁機 및 着磁 요크시스템의 定數算定에 관한 硏究
白壽鉉,金 龍,金必洙,尹秀鳳,朴永浩,尹信容 동국대학교 대학원 1992 大學院硏究論集-東國大學校 大學院 Vol.22 No.-
In a capacitor-discharge impulse magnetizer, a magnet is magnetized by the discharging current of capacitor The actual construction of magnetizing fixtures and discharge matching is expensive and time-consuming. Since the parameters of the impulse magnetizer have been determined and the resistance and inductance of such a magnetizing fixture can be easily computed using FEA, it is possible to predict the performance of such a fixture without actually building it. This paper describes that by mathematically modeling the capacitor-discharge impulse magnetizer fixture the problem can be solved with resonable predictability. The basic equations are presented and used to predict the magnetic-field intensity inside the fixtures. Finite-Element-Analysis is also used as part of the design process