Research Article | OPEN ACCESS
Infection Trace of Pine Wilt Disease Based on Terahertz Spectroscopic Technology
1Ling Jiang, 1Chun Li, 2Lin Huang, 3Zhenwei Zhang, 3Cunlin Zhang and 1Yunfei Liu
1College of Information Science and Technology
2Forest Resources and Environment Institute, Nanjing Forestry University,
159 Longpan Rd., Nanjing 210037, Jiangsu, China
3Terahertz Laboratory, Department of Physics, Capital Normal University,
The West Third Ring Road, Huayuan Bridge, Beijing, China
Advance Journal of Food Science and Technology 2014 5:578-582
Received: November 16, 2013 | Accepted: November 25, 2013 | Published: May 10, 2014
Abstract
In this study, we present the terahertz spectroscopic features of pine needle infected by pine wilt disease during different infection stages by applying terahertz spectroscopic techniques. We measure the absorption variation of the pine needle samples with infection time by Terahertz Time Domain Spectroscopy (THz-TDS). The absorption intensity in the frequency region of 0-2.5 THz increases gradually with infection time. While the pine wood is infected above four months, the absorption intensity reaches to maximum. However, the calculated relative refractive index compared with the reference signal of PET powder reduces with infection time. The higher frequency measurement by Fourier Transform Infrared spectroscopy (FTIR) doesn't show the absorption variation of the samples due to huge signal attenuation in the transmission path of the samples. This study demonstrates that the relation of absorption intensity and refractive index of the pine needle sample with the infection time. We can trace the infection extent of the pine wood by measuring its terahertz spectroscopic property.
Keywords:
Absorption, infection time, pine wilt disease, refractive index, terahertz spectroscopy,
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Competing interests
The authors have no competing interests.
Open Access Policy
This article is distributed under the terms of the Creative Commons Attribution 4.0 International License (http://creativecommons.org/licenses/by/4.0/), which permits unrestricted use, distribution, and reproduction in any medium, provided you give appropriate credit to the original author(s) and the source, provide a link to the Creative Commons license, and indicate if changes were made.
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The authors have no competing interests.
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