Abstract
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.
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Acknowledgments
The authors acknowledge the economical supports by the Instituto Politécnico Nacional through the COFAA and EDI scholarships. Also, we thank Area de Producción de Semillas del Colegio de Postgraduados, Campus Montecillo and Photothermal Techniques Laboratory of Physics Department, CINVESTAV—IPN for the support to develop the experiments of the present study. We also thank Ing. Esther Ayala, Ing. A. B. Soto, and Ing. M. Guerrero for their technical assistance. One of the authors (A.Cruz Orea) is grateful for the economical support from Conacyt project no. 103632.
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Hernandez-Aguilar, C., Cruz-Orea, A., Ivanov, R. et al. The Optical Absorption Coefficient of Maize Seeds Investigated by Photoacoustic Spectroscopy. Food Biophysics 6, 481–486 (2011). https://doi.org/10.1007/s11483-011-9229-9
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DOI: https://doi.org/10.1007/s11483-011-9229-9