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KyongWhan Moon(문경환),YoungWhan Kim(김영환),YunSu Cho(조윤수),HoChul Jung(정호철),OSung Kwon(권오성),JungHan Lee(이정한) 고려대학교 보건과학연구소 2004 보건과학논집 Vol.30 No.1
The objectives of this study are to investigate the relationship between the silver ion concentrations released from the POU devices installed silver impregnated activated carbon filters and the antibacterial activities against HPC bacteria.<BR> Total of 68 POU devices were tested. The concentrations of the eluted silver ion from the silver impregnated activated carbon filter showed the range from 4 ㎍/ℓ to 386 ㎍/ℓ, and the HPC bacteria were found to diversely grow within the range 0-5,200 cfu/mL.<BR> The average silver concentrations released from UF units system and RO units system were 30 ㎍/ℓ and 73 ㎍/ℓ, respectively. The amounts of silver ions in the water passed through RO units system showed about 2.5 times higher than that of UF system units. And the number of colonies were reduced significantly as the elution levels of silver exceeded 100 ㎍/ℓ, however silver ions below the concentration of 100 ㎍/ℓ were not particularly effective for eradicating HPC bacteria from water.<BR> The pHs of permeated water through reverse osmosis membrane were relatively low compare to those of ultra filtration membrane.
새집증후군 및 알레르기 환자 가정의 실내 공기 중 폼알데하이드 농도 조사
문경환(KyongWhan Moon),김영환(YoungWhan Kim),변상훈(SangHoon Byeon),최달웅(DalWoong Choi),권오성(OSung Kwon),이장희(JangHee Lee) 고려대학교 보건과학연구소 2005 보건과학논집 Vol.31 No.1
The significance of formaldehyde as an indoor air pollutant is well established. Formaldehyde is highly irritating to the eyes and upper respiratory tract at low level. Recently, attention has been paid to formaldehyde as an allergen that enhances allergic sensitization. The number of patients of allergy and asthma are gradually increasing in Korea. In this study we investigated the effect of formaldehyde affecting to the patients of new syndrome, allergy and asthma in their residnece houses.<BR> Method detection limits for the procedure was 0.4㎍/L. Precision for the colocated sample showed 4.1% and accuracy spiked recovery was 101.6%.<BR> Concentrations of indoor air formaldehyde in patients" homes of allergy and new house syndrome were high compared to non-patients" houses (p < 0.05). But no significant differences could be shown for the concentration of formaldehyde in indoor air between the homes of asthma patients and healthy families.
일부 대중 목욕탕 욕수의 레지오넬라균 분포실태 및 혈청학적 특성
김영환(YoungWhan Kim),문경환(KyongWhan Moon),이장희(JangHee Lee),조일형(IlHyung Cho),김미라(MiRa Kim) 고려대학교 보건과학연구소 2004 보건과학논집 Vol.30 No.1
This study was to determine the prevalence of Legionella species in public spas and to know that the presence of Legionella was correlated with other microbiological parameters. A total of 81 water samples were collected from 30 different public spas and sudatoriums so called zzimzilbang in Korea. Although Legionella was not detected in raw water(tap water) and the cold tub water, of the 38 samples of hot and warm water taken from public tubs, 11 samples(28.8%) were found to be positive for Legionella spp. All of the isolates were identified as a species L. pneumophila serogroups 1 and 2-14 by latex agglutination. The levels of L. pneumophila were fairly distributed over a broad range of concentrations from <10² cfu/㎖ to 10⁴ /㎖, with 1 of a spas in the <100 cfu/㎖, 4 spas in the 10² to 10³ cfu/㎖, and 2 spas had levels of culturable L. pneumophila. >104 cfu/㎖. And HPC concentrations in all spa waters isolated Legionella were above the level of 104 cfu/ml. Total coliforms were detected in 45% of the samples and were grew in even raw water. But total coliform was not detected in the majority of Legionella-positive samples. The correlation between the presence of Legionella and total coliforms was not showed in the tub water. On the basis of these results, it would appeared that Legionella proliferate primarily in inadequate tubs to control the total bacteria numbers.
김영환(YoungHwan Kim),문경환(KyongWhan Moon) 고려대학교 보건과학연구소 2006 보건과학논집 Vol.32 No.2
본 연구는 아토피 환자 가정 내 실내 공기중 오염물질 농도가 아토피 발증에 미치는 영향을 파악하고자 하였다. 조사대상으로는 12명의 아토피 환자 가정과 10명의 대조군 가정을 선정하였으며, 각 가정 실내외 공기중에서 미세먼지(PM₁?)와 16종의 다환방향족탄화수소류(PAHs)를 측정하였다.<BR> 실외 공기중 미세먼지의 농도는 아토피 환자가정과 대조군 가정간에 유의한 차이를 보이지 않았으나 실내 공기중에서는 아토피 환자가정의 미세먼지가 대조군에 비해 높게 나타났다(p<0.05). 다환방향족탄화수소류는 실내ㆍ외 공기중의 총농도가 각각 160.4 ng/㎥, 47.2 ng/㎥로 유의한 차이를 나타냈으며(p<0.05), phenanthrene, anthracene이 총 다환방향족탄 화수소류의 40~45%를 차지하는 것으로 나타났다. 하지만 아토피 환자가정과 대조군 가정내 실내 공기중 다환방향족탄화수소류는 유의한 차이를 보이지 않았다.