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Search Results: 1 - 2 of 2 matches for " Pasuree Sangsupawanich "
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Work-Related Respiratory Symptoms Among Cotton-Fabric Sewing Workers
Pitchaya Phakthongsuk, Pasuree Sangsupawanich, Amornrat Musigsan, Greetha Thammakumpee
International Journal of Occupational Medicine and Environmental Health , 2007, DOI: 10.2478/v10001-007-0011-7
Abstract: Objectives: An inspection of the sewing unit in a 700-bed hospital revealed that workers employed in this unit complained of cough, shortness of breath, and tightness in the chest. The aim of this cross-sectional study was to assess the prevalence of respiratory symptoms in the sewing workers and dust concentration in the workplace. The obtained results were compared with the control group. Materials and Methods: The sewing workers (n = 22, including 19 current and 3 former employees) and 22 housekeepers as controls were included in the study. All the participants responded to the respiratory questionnaire and underwent spirometric measurements, skin prick test, chest X-ray, and methacholine inhalation test. Environmental dust was measured using both an air pump and a vertical elutriator. Results: The sewing workers reported more symptoms of phlegm, chest tightness and eye irritation than persons of the control group. Neither clinical investigations nor respiratory disorders under study provided evidence for a significant difference between the sewing workers and the control group. Of the 22 subjects, 2 (9.1%) showed occupational asthma and 4 (18.2%) mucous membrane irritation and organic dust toxic symptoms. The total and respiratory dust was within normal limits, but the dust concentration measured by the elutriator was above the limit value of 0.34 ± 0.09 mg/m. After ventilation improvements, the dust level decreased to 0.19 ± 0.06 mg/m. Conclusions: This study indicated that respiratory and ocular disorders were related to organic dust produced during the sewing process of cotton fabric.
Photocatalytic of TiO2-SiO2 Thin Films Co-Doped with Fe3+ and Thio-Urea in the Degradation of Formaldehyde by Indoor and Outdoor Visible Lights  [PDF]
Charuwan Kaewtip, Kamolporn Accanit, Nat-a-nong Chaowai, Kanokpun Areerat, Pasuree Reanjaruan, Virote Boonumnauyvitaya
Advances in Materials Physics and Chemistry (AMPC) , 2012, DOI: 10.4236/ampc.2012.24B012
Abstract: In this work the photocatalytic activity of TiO2-SiO2 thin films co-doped with Fe3+ and thio-urea in the degradation of the gaseous formaldehyde was investigaged by indoor and outdoor visible lights. The films were synthesized by Peroxo Titanic Acid (PTA) method. The physicochemical properties of prepared samples were characterized using SEM and UV-vis absorption spectroscopy. It was found that the average film thickness of all coated samples was about 394 ± 5 nm. The band gap energy of un-doped and co-doped photocatalysts was 3.08 and 2.88 eV, respectively. The photocatalytic experimental results showed that the co-doped TiO2-SiO2 thin film yield higher photocatalytic efficiency.  Under the outdoor light (sunlight in the shade condition) irradiation, with the initial concentrations of formaldehyde of 1000, 3000 and 5000 ppmV, the efficiencies of formaldehyde degradation were 94.7 %, 89.5% and 85.1 %, respectively. Under the indoor light (the fluorescent lamp) irradiation, with the same formaldehyde initial concentrations, the photocatalytic activities were 87.4%, 85.3% and 81.5%, respectively.
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