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Monitoring of pesticide residues in domestic vegetables in Thailand during 2015 |
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| รหัสดีโอไอ | |
| Creator | Weerawut Wittayanan |
| Title | Monitoring of pesticide residues in domestic vegetables in Thailand during 2015 |
| Contributor | Jitpaka Suntudrob, WischadaJongmevasna, Thongsuk Payanan, Rattiyakorn Srikote |
| Publisher | Asia-Pacific Journal of Science and Technology |
| Publication Year | 2561 |
| Journal Title | Asia-Pacific Journal of Science and Technology |
| Journal Vol. | 23 |
| Journal No. | 4 |
| Page no. | 1-8 |
| Keyword | Food safety,Monitoring program,Pesticide residues,Thailand,Vegetables |
| URL Website | https://www.tci-thaijo.org/index.php/APST/index |
| Website title | https://tci-thaijo.org/index.php/APST/article/view/82352 |
| ISSN | 2539-6293 |
| Abstract | In this study, worthless discarded oil palm fronds were used to produce environmentally-friendly sound absorbing material to replace harmful man-made inorganic fibers. To quantify thepropertiesofsound absorption,oil palm frond fiberboardsin various densities, i.e.,0.17, 0.21, 0.26and0.30 gcm-3, were produced by traditional soft board productionandtested for their sound absorption coefficients at 250, 500, 1000 and 4000 Hertz using a standing wave apparatus assembled following ASTM C-384. The boardswith the best sound absorption capacity wereselected to cover theirsurfacesusing thenonperforated and 5% perforated wood veneers, and the effects of surface finishing on theirsound absorption capacity were rechecked. Results showed that the lower density fiberboards showed better sound absorption at high frequencies. Among these, 0.17 g cm-3fiberboards displayed the highest sound absorption capacity.Once these boards were finished withthe nonperforated wood veneers, the sound absorption coefficients at high frequencies sharply decreased. However, when perforating the veneer sheets, the coefficientsof fiberboards increasedandwerecomparableto theoneswithout any finishing.Therefore, the optimumdensity of fiberboard and opening surface can enhancethe sound absorption capacityof fibers |
