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Indoor Air Quality Monitoring via IT Network
Yoshika Sekine,Risa Katori 제어로봇시스템학회 2009 제어로봇시스템학회 국제학술대회 논문집 Vol.2009 No.8
A simple and rapid monitoring system of indoor air pollution is proposed by integrating a colorimetric detection method of formaldehyde (HCHO) and a function of image transmission of a mobile phone via IT network.The colorimetric detector employs a solid phase colorimetric reagent made from AHMT, ZnO, KIO4 and agar, and discolors from white to purple when exposed to a certain amount of HCHO gas. Although the color degree responds to the HCHO concentration levels, visual judgment often involves personal bias that leads to uncertainty. In this feasibilitystudy, variation of the acquired photo images expressed in RGB model was investigated by changing a type of mobilephone and conditions of photography. As a result, the calibration of the measured color degree with a color standardreduced the variation of the results and gave a significant color degree when the images were taken under the consistentcondition. Since the light source was one of the significant elements for image analysis, the light condition should be decided for practical applications.
Sick House/Building Syndrome in JAPAN -Current Status and Practical Research on Indoor Air Quality-
Sekine Yoshika Korean Society of Environmental Health 2005 한국환경보건학회지 Vol.31 No.3
Many Japanese today are suffering from health disorders related to their living environment, such as allergies and hypersensitivity to chemical substances. The Sick House/Building Syndrome has been a serious problem since 1996, due to low level exposure to hazardous chemicals such as formaldehyde and volatile organic compounds (VOCs) emitted in airtight houses. This paper aims to show current status of the syndrome in Japan and practical researches to promote prevention of, and improvement to indoor air pollution due to chemicals.
SICK HOUSE/BUILDING SYNDROME IN JAPAN
Yoshika SEKINE 한국환경보건학회 2005 한국환경보건학회지 Vol.31 No.3
Many Japanese today are suffering from health disorders related to their living environment, such as allergies and hypersensitivity to chemical substances. The Sick House/Building Syndrome has been a serious problem since 1996, due to low level exposure to hazardous chemicals such as formaldehyde and volatile organic compounds (VOCs) emitted in airtight houses. This paper aims to show current status of the syndrome in Japan and practical researches to promote prevention of, and improvement to indoor air pollution due to chemicals.
Shiro Ikeda,Masafumi Oikawa,Yoshika Sekine 제어로봇시스템학회 2009 제어로봇시스템학회 국제학술대회 논문집 Vol.2009 No.8
Bioassay, which detects biohazardous property of environmental contaminants, is still being an unexploredfield of air quality monitoring. This study aims to develop a simple testing system of toxicity of the indoor particulate matter by detecting bioluminescence reduction of marine bacterium Vibrio fischeri. Suspended particulate matter in indoor and outdoor air was collected on a quartz fiber filter at a flow rate of 23.5 L/min. by a low volume air sampler for 7-day duration, at the terrace and living room of an apartment house in Kanagawa, Japan. Collected materials wereextracted with sterilized distilled water by mild shaking. After filtration with 0.45 ??m pore size filter, the extracts were subsequently mixed with a bacterium solution in a well of 24-well plate and time courses of bioluminescence intensity were measured by a luminometer. As a result, the water extracts of indoor and outdoor aerosol samples significantly reduced the bioluminescence of Vibrio fischeri and the inhibition per sampling volume increased with increasing TSPconcentrations. The inhibition per unit mass of the indoor aerosols became greater than that of outdoor aerosols, whenincreasing in air change rate. The inhibition tended to correlate with nitrate and sulfate concentrations in the extracts. This study showed possible application of bioassay to the monitoring of indoor suspended particle contamination.