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Humidifier disinfectants, unfinished stories
Choi, Yeyong,Paek, Domyung The Korean Society of Environmental Toxicology 2016 환경독성보건학회지 Vol.31 No.-
Once released into the air, humidifier disinfectants became tiny nano-size particles, and resulted in chemical bronchoalveolitis. Families had lost their most beloved members, and even some of them became broken. Based on an estimate of two million potential victims who had experienced adverse effects from the use of humidifier disinfectants, we can say that what we have observed was only the tip of the iceberg. Problems of entire airways, as well as other systemic effects, should be examined, as we know these nano-size particles can irritate cell membranes and migrate into systemic circulation. The story of humidifier disinfectant is not finished yet.
Epidemiological Characteristics of Mobile Phone Ownership and Use in Korean Children and Adolescents
Byun, Yoon-Hwan,Ha, Mina,Kwon, Ho-Jang,Choi, Kyung-Hwa,Burm, Eunae,Choi, Yeyong,Lim, Myung-Ho,Yoo, Seung-Jin,Paik, Ki-Chung,Choi, Hyung-Do,Kim, Nam The Korean Society of Environmental Toxicology 2013 환경독성보건학회지 Vol.28 No.-
Objectives As public concern on possible harmful effects of mobile phone in children has been raised, information of epidemiological characteristics of mobile phone use in children and adolescents will be essential for public health policy. Methods Using three databases (n=21,693) collected from 2008 to 2011, we examined characteristics of mobile phone ownership and use, and socioeconomic positions (SEP) in Korean children and adolescents. Results The ownership rate and the amount of mobile phone use were higher in females than males, in higher school grades than lower grades, and at 2011 than 2008. The average age of first mobile phone ownership was shown to decrease from 12.5 years in currently high school students to 8.4 years in currently elementary school students at 2011. More than 90% of children in the 5th grade owned a mobile phone. More children owned a mobile phone in lower SEP communities than in higher SEP. Children with parents educated less than those with parents educated more were more likely to own and use mobile phone. Conclusions Considering the epidemiological characteristics of mobile phone use, precautionary measures to prevent unnecessary exposure to mobile phones are needed in children and adolescents.
Epidemiological Characteristics of Mobile Phone Ownership and Use in Korean Children and Adolescents
Yoon-Hwan Byun,Mina Ha,Ho-Jang Kwon,Kyung-Hwa Choi,Eunae Burm,Yeyong Choi,Myung-Ho Lim,Seung-Jin Yoo,Ki-Chung Paik,Hyung-Do Choi,Nam Kim 환경독성보건학회 2013 환경독성보건학회지 Vol.28 No.-
Objectives As public concern on possible harmful effects of mobile phone in children has been raised, information of epidemiological characteristics of mobile phone use in children and adolescents will be essential for public health policy. Methods Using three databases (n=21,693) collected from 2008 to 2011, we examined characteristics of mobile phone ownership and use, and socioeconomic positions (SEP) in Korean children and adolescents. Results The ownership rate and the amount of mobile phone use were higher in females than males, in higher school grades than lower grades, and at 2011 than 2008. The average age of first mobile phone ownership was shown to decrease from 12.5 years in currently high school students to 8.4 years in currently elementary school students at 2011. More than 90% of children in the 5th grade owned a mobile phone. More children owned a mobile phone in lower SEP communities than in higher SEP. Children with parents educated less than those with parents educated more were more likely to own and use mobile phone. Conclusions Considering the epidemiological characteristics of mobile phone use, precautionary measures to prevent unnecessary exposure to mobile phones are needed in children and adolescents.
방수 스프레이 흡입 노출로 인한 급성 호흡기 중독 사례 및 원인 고찰
박동욱,최예용,Park, Donguk,Choi, Yeyong 한국환경보건학회 2012 한국환경보건학회지 Vol.38 No.6
Background: In Korea, a healthy 36-year-old man developed acute interstitial pneumonitis soon after inhaling a waterproofing spray which he had applied at home to his outdoor jacket. Objectives: The objectives of this study were to review cases of varying degrees of respiratory toxicity and poisoning in connection with the use of waterproofing spray and summarize major reasons for cases of poisoning. Methods: We searched articles reporting on a combination of a waterproofing agent and/or respiratory symptoms, including acute respiratory syndrome, lung injury, pneumonia, pulmonary toxicity, and respiratory disease. Results: We reviewed a number of cases of varying degrees of respiratory toxicity and poisoning resulting from inhalation of waterproofing spray containing fluorocarbon co-polymer, solvents and propellants reported in a variety of countries. The literature searches concluded that among the ingredients of waterproofing agents, fluorinated polymer may cause acute respiratory health effects. Conclusion: Environmental policy should be implemented in order to prevent consumers from using household and industrial products including waterproofing agents. In addition, a national surveillance system should be created to collect cases of poisoning caused by the use of consumer products.
Genetic evidence of illegal trade in protected whales links Japan with the US and South Korea
Baker, C. Scott,Steel, Debbie,Choi, Yeyong,Lee, Hang,Kim, Kyung Seok,Choi, Sung Kyoung,Ma, Yong-Un,Hambleton, Charles,Psihoyos, Louie,Brownell, R. L.,Funahashi, Naoko The Royal Society 2010 Biology letters Vol.6 No.5
<P>We report on genetic identification of ‘whale meat’ purchased in sushi restaurants in Los Angeles, CA (USA) in October 2009 and in Seoul, South Korea in June and September 2009. Phylogenetic analyses of mtDNA cytochrome <I>b</I> sequences confirmed that the products included three species of whale currently killed in the controversial scientific whaling programme of Japan, but which are protected from international trade: the fin, sei and Antarctic minke. The DNA profile of the fin whale sold in Seoul established a match to products purchased previously in Japan in September 2007, confirming unauthorized trade between these two countries. Following species identification, these products were handed over to the appropriate national or local authorities for further investigation. The illegal trade of products from protected species of whales, presumably taken under a national permit for scientific research, is a timely reminder of the need for independent, transparent and robust monitoring of any future whaling.</P>