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김지원 ( Ji Won Kim ),이선홍 ( Sunhong Lee ),임현이 ( Hyun Ee Yim ),정종철 ( Jong Cheol Jeong ),신규태 ( Gyu-tae Shin ),김흥수 ( Heungsoo Kim ),박인휘 ( Inwhee Park ) 대한내과학회 2018 대한내과학회지 Vol.93 No.4
Branchio-oto-renal (BOR) syndrome is a rare autosomal dominant disorder that is characterized by preauricular pits, branchial fistula, branchial cyst, hearing impairment, and kidney anomalies. Hearing impairment is the single most common feature of BOR syndrome, affecting 89% of patients. Preauricular pits (77%), kidney anomalies (66%), branchial fistula (63%), external auditory canal anomalies (41%) are also common. For most patients, BOR syndrome does not affect life expectancy. The major life-threatening feature of this condition is kidney dysfunction, which occurs with about 6% of kidney anomalies. Therefore, once BOR syndrome is recognized in a patient, careful evaluation to detect renal anomalies and treatment of any kidney involvement are necessary. No case reports of BOR syndrome involving adult-onset end-stage kidney disease have been published in the Korean medical literature. We report a case of end-stage kidney disease in a 19-year-old male patient with BOR syndrome, together with a review of the pertinent literature. (Korean J Med 2018;93:398-403)
담수 물환경 중 미세플라스틱 분석방법 및 검출에 대한 고찰
유혜원 ( Hye-weon Yu ),김윤석 ( Yun S. Kim ),이선홍 ( Sunhong Lee ),유지수 ( Jisu Yoo ),최재원 ( Jaewon Choi ) 한국환경분석학회 2020 환경분석과 독성보건 Vol.23 No.4
Theresearchscopeofmicroplasticsinaqueousenvironmenthasbeenexpandingfrominvestigationoftheirpresenceinoceanicwatertotheanalysisoftheirdistributionandbehaviorinfreshwater.However,researchinaqueousenvironmentislimitedbecausethelackofstandardizedevaluationtechniqueshasresultedintheuseofvariousunrelatedanalysismethods,thusmakingitdifficulttocomparedataonmicroplasticcontaminationanddistribution.Giventheirknownoceanicdistribution,asurveyontheoccurrenceofmicroplasticcontaminationandbehaviorinthefreshwaterenvironmentneedstobeconductedusingapreciseandaccuratestandardanalyticalmethod.Suchamethodwouldfacilitateasystematicanduniformapproachtodomesticandinternationalsafetymanagementandtothedevelopmentofimprovementplansneededtomitigatemicroplasticcontamination.Inthisstudy,wehavesummarizedthetechnologiesrecentlyappliedformicroplasticanalysisandfortheinvestigationofmicroplasticoccurrenceinthefreshwaterenvironment.Wehavealsopresentedareviewontheanalysisandevaluationofmicroplasticcontaminationinthefuture.
Analysis of microplastics in freshwater using thermal degradation method
Hye-Weon Yu(유혜원),Yun S. Kim(김윤석),SunHong Lee(이선홍),JiSu Yoo(유지수),Jaewon Choi(최재원) 환경독성보건학회 2021 한국독성학회 심포지움 및 학술발표회 Vol.2021 No.5
Due to the high production and consumption of plastic worldwide, it has been drawn great attention on microplastics(MPs) entered the environment, especially the aquatic environment. The research scope of MPs in aqueous environment has been expanding from investigation of their presence in oceanic water to the analysis of their source, occurrence or fate in freshwater, as well as potential environmental or health risks. In recent years, questions concerning very small plastic particles, nanoplastics(NPs, 1~1000 nm), have emerged. Since the current spectroscopic analytical methods developed for microplastics have a particle size limitation and cannot reach the submicrometer range, mass spectrometry combined with thermal degradation appears to be a promising technique to meet these challenges. Thermal degradation allows the conversion of macromolecules into low molecular weight fragments, which are then separated by gas chromatography and identified by a mass detector(GC-MS). Due to the limited sample weight and the maximum operating temperature of the thin capillary of Pyrolysis-GC/MS, in this study we present an automated thermal extraction desorption(TED)-GC/MS with a separation of the thermal extraction process which is suited for the analysis of MPs and NPs in a freshwater samples.