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Nosocomial Outbreak Caused by NDM-5 and OXA-181 Carbapenemase Co-producing Escherichia coli
안광진,황규열,김영근,김효열,정혜란,홍준성,어영 대한감염학회 2019 Infection and Chemotherapy Vol.51 No.2
Carbapenemase-producing Enterobacteriaceae (CPE) is an important and increasing threat to global health. From July to September 2017, 20 inpatients at a tertiary care hospital in Korea were either colonized or infected with carbapenem-resistant Escherichia coli strains. All of E. coli isolates co-produced blaNDM-5 and blaOXA-181 carbapenemase genes and shared ≥88% clonal relatedness on the basis of a cladistic calculation of the distribution of pulsed-field gel electrophoresis patterns. Rapid detection of CPE is one of the most important factors to prevent CPE dissemination because it takes long time for CPE to become negative.
Catalytic n-Hexane Reforming on Nanocatalysts
안광진 한국공업화학회 2016 한국공업화학회 연구논문 초록집 Vol.2016 No.1
Catalytic reforming of hydrocarbons is of key importance for the production of high-octane gasoline in petroleum chemistry. Since environmental regulations limit aromatic compounds in gasoline due to their carcinogenic nature, selective production of branched hydrocarbons with high octane number is highly desirable. n-Hexane reforming is an excellent model reaction to study structure- and support-dependent catalytic selectivity, because it has four distinct reaction pathways: isomerization, cyclization, aromatization, and cracking. The current studies revealed that catalytic selectivity toward isomerization was increased by introducing different oxide supports to Pt nanoparticle catalysts. In addition, the acidity of mesoporous supports also affected reaction rates in n-hexane reforming.
안광진,김영근,황규열,조현미,어영 연세대학교의과대학 2021 Yonsei medical journal Vol.62 No.10
Purpose: Despite decreased prevalence of tuberculosis, the incidence of the diseases associated with nontuberculous mycobacteria (NTM) has been increasing in South Korea and around the world. The present retrospective study was conducted to determine longitudinal changes in the epidemiology and distribution of NTM over 13 years at a tertiary care hospital in Korea. Materials and Methods: We retrospectively analyzed data on Mycobacterium species over 13 years (January 2007 to December 2019) by utilizing the laboratory information system. Mycobacterium species were identified using biochemical tests and PCR-restriction fragment length polymorphism and Mycobacteria GenoBlot assays. Results: After excluding duplicates from the initial pool of 17996 mycobacterial isolates, 7674 strains were analyzed and 2984 (38.9%) NTM were isolated. The proportion of NTM continuously increased over the 13-year period, from 17.0% in 2007 to 57.5% in 2019. Among the NTM isolates, the most common species were Mycobacterium intracellulare (50.6%), M. avium (18.3%), M. fortuitum complex (4.9%), M. abscessus (4.5%), M. gordonae (3.3%), M. kansasii (1.1%), M. chelonae (1.0%), and M. massiliense (0.9%). In patients over the age of 70 years, the proportion of NTM among the isolates increased from 26.6% in 2007 to 62.0% in 2019, and that of M. intracellulare isolates among the NTM increased from 13.9% (11/79) in 2007 to 37.4% (175/468) in 2019. Conclusion: The number of NTM isolates continuously increased over the study period, and the increase in the proportion of M. intracellulare in patients aged over 70 years was notable.
이청준 문학에 나타난 작가의식 연구—단편소설「 소매치기올시다」를 중심으로
안광진 단국대학교(천안캠퍼스) 한국문화기술연구소 2014 한국문화기술 Vol.18 No.-
Since its debut in 1965 by Yi Chong-jun, he has been constantly worrying about the problem, “What is the artists there?” He wrote the short story ‘Domination and Liberation “about the origins of writing. As well as ‘The Wall of Rumor’ he has been raised the problem ‘What is an author?’ or “it writes novels What does it mean?’ which has raised the issue of writer consciousness ‘I am a Pickpocket’ is a novel with a very unique idea to write off a parable to pickpocket the act. The novel was published in 1969 issue of 5,6 ‘Sasanggye’ There was a whole story acts as a giant allegory. Fictional words and actions, which all have to be evident in the correlation with the writing assignment. As stated in the first part of this novel’s first-person monologue begins with the protagonist has been suggested that a person who claims proudly that his career pickpocket. Distinct properties of the pickpocket will steal other people’s stuff. The novelist who also stole the lives of others to build their own world of fiction. The author connects between the two in common with the ‘steal’ the act of a novelist and a pickpocket.This novel has a huge allegory and satire in the novel writing format through pickpocket. All figures and words and actions that will be mobilized by the artist in the dual structure, which can be read as fiction writing and attitude of the novelist. In this way, a novelist, which is represented by the target, the strategy adopted by writers ‘pickpocket’ in satire, as well as being pickpocket guests, namely ‘the reader’ s also is facing a double arrow that travesty of a complex hidden intentions. There is a world of fiction responsibility of the reader to accept the fiction writer as well as the responsibility of the originator is also the author implies this novel tube is an important part. Fiction is an act not only be made with the reader, not the work of the author alone. The author makes a judgment that finally possible derision directed toward others when they are the subject of a caricature satire. That is why the author has set up a situation that can only come allegory form. The pickpocket is lightweight, low thermal material will inevitably be felt in person or event. But the inside shows the purity and strict ritual of confrontation than any fiction writer. This story showed the position of writing the two targets of pickpockets and novelist takes the form of an allegory. The author emphasizes the attitude of a true writing against the worldly corruption of the attitude and rigorous writing. Lee Chong-jun was expressed the difficulty of writing well connected to the characteristics of pickpockets and writer. This work is a masterpiece, which means that you can glimpse the intense creative attitude of the writer in complex configurations.
구형 마이크로스트립 패치 배열을 이용한 진행파 안테나의 특성 해석에 관한 연구
안광진,윤상원,장익수 대한전자공학회 1994 전자공학회논문지-A Vol.31 No.10
In this paper, the leaky wave readiation characteristics of a microstrip rectangular patch array is presented. The reflection and transmission characteristics are analyzed using the equivalent transmission line method. Since the leaky wave is generated from the periodic array, using the Floquet'theorem, leaky wave frequency range is predicted and confirmed by the measured reflection and transmission characterstics of the array. A 17 element microstrip patch array at X-Band is designed and tested. Teh scattering Characteristics show good agreement woth those obtained from the equivalent transmission line analysis. The radiatio characteristics at 10GHz using this method show about 3${\circ}$ shift in main lobe angle compared with measured results.