The Optical Absorption Coefficient of Maize Grains Investigated by Photoacoustic Spectroscopy
| Autor: | A. Dominguez-Pacheco, Alfredo Cruz-Orea, Claudia Hernández-Aguilar, C. L. Rodríguez-Páez, E. Moreno-Martínez, R. Rico-Molina, A. Carballo-Carballo |
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| Rok vydání: | 2016 |
| Předmět: |
Materials science
genetic structures Absorption spectroscopy Opacity Analytical chemistry food and beverages 02 engineering and technology 021001 nanoscience & nanotechnology Condensed Matter Physics chemistry.chemical_compound Reflection (mathematics) Integrating sphere 020401 chemical engineering chemistry Methyl red 0204 chemical engineering 0210 nano-technology Absorption (electromagnetic radiation) Photoacoustic spectroscopy Optical absorption coefficient |
| Zdroj: | International Journal of Thermophysics. 38 |
| ISSN: | 1572-9567 0195-928X |
| DOI: | 10.1007/s10765-016-2141-2 |
| Popis: | The knowledge about a seed’s optical parameters is of great relevance in the seed technology practice. Such parameters provide information about its absorption and reflectance, which in turn is related to its color, quality, and health condition. The objective of the present study was to determine the optical absorption coefficient β for maize seeds (Zea mays L.) by means of the photoacoustic spectroscopy (PAS). Untreated seeds (I) and seeds dyed with methyl red (II) were used in this investigation. In addition, conventional reflectance measurements (obtained with the integrating sphere) were performed to validate PAS absorption measurements. The results show that the absorption spectra and reflection data of the seed samples are complementary. When used with thermally thick and optically opaque seeds, PAS may be considered as a potential diagnostic tool for the characterization of the seeds. |
| Databáze: | OpenAIRE |
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