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House-plant placement for indoor air purification and health benefits on asthmatics
임영욱,양지연,이재영,박정원,김관진,임병서,이건우,이시은,신동천,임영욱 환경독성보건학회 2014 환경독성보건학회지 Vol.29 No.-
Objectives Some plants were placed in indoor locations frequented by asthmatics inorder to evaluate the quality of indoor air and examine the health benefits to asthmatics. Methods The present study classified the participants into two groups: households ofcontinuation and households of withdrawal by a quasi-experimental design. The householdsof continuation spent the two observation terms with indoor plants, whereas thehouseholds of withdrawal passed the former observation terms with indoor plants andwent through the latter observation term without any indoor plants. Results The household of continuation showed a continual decrease in the indoor concentrationsof volatile organic compounds (VOCs) during the entire observation period,but the household of withdrawal performed an increase in the indoor concentrations ofVOCs, except formaldehyde and toluene during the latter observation term after the decreaseduring the former observation term. Peak expiratory flow rate (PEFR) increased inthe households of continuation with the value of 13.9 L/min in the morning and 20.6 L/min in the evening, but decreased in the households of withdrawal with the value of -24.7L/min in the morning and -30.2 L/min in the evening in the first experimental season. Allof the households exhibited a decrease in the value of PEFR in the second experimentalseason. Conclusions Limitations to the generalizability of findings regarding the presence ofplants indoors can be seen as a more general expression of such a benefit of human-environmentrelations.
임영욱,김효현,이준상,노영만,이기영,정혜웅,이재영 한국환경농학회 2008 한국환경농학회지 Vol.27 No.3
A global binding agreement was adopted with the leading of United Nations Environment Program (UNEP) on May 22, 2001 in Stockholm to regulate the production and distribution on persistent organic pollutants (POPs). The agreement took effectuation with the ratification of 59 countries from the approval of 151 countries on May 17, 2004. After the approval on October 4, 2001, South Korea performed systematical investigation on POP-related substances such as chlordane, dichloro diphenyl trichloroethane (DDT), hexachlorobenzenes (HCB), heptachlor, polychlorinated biphenyls (PCBs) to get ready for the ratification of the convention with country-specific exemption. The domestic distributions of those chemical substances have been officially prohibited since the late 1960s to the early 1980s. Although there were occasional reports for the detection of some of those chemical substances, those performed minute signification in their existence in the environment. A series of investigation with documentary examination and fact-finding survey showed the possibility for the ratification on the convention without country-specific exemption.
Total Hip Arthroplasty in Patient with the Sequelae of Legg-Calve´-Perthes Disease
임영욱,김용식,김명진,이용석 대한고관절학회 2014 Hip and Pelvis Vol.26 No.4
Purpose: Patients who have secondary hip osteoarthritis as sequelae of Legg-Calve´-Perthes disease (LCPD) are severe deformities of femoral head and acetabulum. A few studies have presented that the clinical results and risks associated with total hip arthroplasty (THA) for patients with a history of LCPD were not satisfactory. Inthis study, we reported the radiographic and clinical outcomes of THA in patients with sequelae of LCPD. Materials and Methods: Between March 2007 and May 2012, 23 hips (23 patients) underwent cementless THA and were followed up at least 2 years after surgery. There were 11 male patients and 12 female patients with an average age of 49.2 years old (range, 25 to 69 years old), and the average follow up period was 40.8 months (range, 24 to 84 months). The clinical and radiological evaluations were performed. Results: The Harris hip score improved from 48.3 points preoperatively to 92.4 points at the time of the last follow-up. The shortening of affected limb was improved from –1.6 cm to 0.2 cm. The complications included one case of sciatic nerve palsy that developed after extensive lengthening of lower extremity, three cases of intraoperativefemur fractures. There was no component loosening. Conclusion: Fractures and motor nerve palsies may be more frequent in this population. Careful preoperative planning should be performed to overcome the technical pitfalls. If overcoming this early complication, the clinical and radiological evaluations showed excellent outcomes at average 40-month follow-ups.