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우리나라에 있어서 室內 空氣汚染에 관한 硏究 : 個人用 Sampler를 利用한 二酸化窒素 濃度 測定
金潤信,JohnD.Spengler,柳澤幸雄 대한보건협회 1984 대한보건연구 Vol.10 No.2
A pilot study for indoor and outdoor NO2 measurements in Korea was firstly undertaken by using personal samplers during January-Febrauary 1984 in Seoul. This study was attempted to assess the NO2 levels inside building offices and selected outdoor areas and to compare the measurements monitored by different personal samplers. The mean NO2 concentrations in offices measured by filter badge sampler were 32.6 ppb, while the corresponding levels measured by passive diffusion tube were 40.6 ppb. The use of kerosene heater in offices was associated with a significantly increased levels of NO2 measured both by diffusion tube and filter badge samplers. The mean NO2 concentrations in main streets exceeded the Korea ambient NO2 standard of 50 ppb. Multiple regression analysis was done to investigate the effects of sampling period, length of stove use, and office size on NO2 concentrations. It was significantly shown that office size had the highest contribution ratio for predicting the exposure levels of NO2. These findings emphasize the potential importance of indoor sources and characteristics of office building structures in determining indoor NO2 levels. These results from a pilot study stress the need to investigate further research of indoor pollution problems in Korea in the future.
Reduction of acetaldehyde formation from pulverized solid woods by thermal and chemical treatments
Mizukoshi, Atsushi,Kurosaki, Yosuke,Yamamoto, Naomichi,Noguchi, Miyuki,Iizuka, Atsushi,Yamasaki, Akihiro,Yanagisawa, Yukio Springer-Verlag 2018 Wood science and technology Vol.52 No.2
<P>High concentrations of acetaldehyde are often observed in indoor environments. One possible source of this is acetaldehyde formation produced by ethanol from wood building materials. To characterize indoor acetaldehyde formation and propose methods for its reduction, chamber-based experiments were conducted in which alcohols were added to pulverized solid woods. The results indicated that acetaldehyde was generated from the ethanol-added wood materials, and softwoods, namely Japanese cedar, Japanese cypress, and Swedish redwood generated more acetaldehyde than the other three woods. The experiments using different types of alcohols of methanol, ethanol, 1-propanol, and 2-propanol revealed a tendency similar to the reported enzymatic profile of the higher plant-derived alcohol dehydrogenase. It was confirmed that acetaldehyde generation was reduced by treatment methods typically used for inactivating enzymes, namely chemical treatments using pyrazole, borate, and urea and thermal treatments. The findings suggest that the chemical and thermal treatment methods are useful to reduce acetaldehyde generation in indoor environments.</P>