Ripening of avocado fruits studied by spectroscopic techniques
(2020) In Journal of Biophotonics 13(8).- Abstract
Avocados are considered very healthy due to the high content mono-unsaturated lipid, essential vitamins and minerals, minimal sugar and no cholesterol and are therefore sometimes referred to as “the perfect fruits”. Avocados, mainly grown in Latin-America, are harvested unripe and sent overseas. However, the ripening process is very difficult to assess visually and tactilely. A tool for precise noninvasive judgment of the status would be valuable as the fruit is too expensive to be cut open unripe or overdue. A white-light source and a light-emitting diode unit with four excitation wavelengths (365, 385, 395, and 405 nm) were used for reflectance and fluorescence spectroscopy in a fiber-coupled set-up for noninvasive monitoring. Twelve... (More)
Avocados are considered very healthy due to the high content mono-unsaturated lipid, essential vitamins and minerals, minimal sugar and no cholesterol and are therefore sometimes referred to as “the perfect fruits”. Avocados, mainly grown in Latin-America, are harvested unripe and sent overseas. However, the ripening process is very difficult to assess visually and tactilely. A tool for precise noninvasive judgment of the status would be valuable as the fruit is too expensive to be cut open unripe or overdue. A white-light source and a light-emitting diode unit with four excitation wavelengths (365, 385, 395, and 405 nm) were used for reflectance and fluorescence spectroscopy in a fiber-coupled set-up for noninvasive monitoring. Twelve non-ripe avocados, with approximately the same size and appearance, were studied and divided into three groups and kept at three different storage conditions; at room temperature, in a refrigerator and a combination of the two. We showed that fluorescence was useful for following the ripening process. A method, which compensates for the spatial variations in spectral properties around a fruit, is described. Remote fluorescence monitoring, intended for orchard use, was also demonstrated. A low-cost device based on fluorescence for avocado ripeness assessment is proposed.
(Less)
- author
- Lin, Xiaobo ; Zhang, Han ; Hu, Lingna ; Zhao, Guangyu ; Svanberg, Sune LU and Svanberg, Katarina LU
- organization
- publishing date
- 2020-08
- type
- Contribution to journal
- publication status
- published
- subject
- keywords
- avocado, fluorescence spectroscopy, fruit ripening, noninvasive technique, reflectance spectroscopy
- in
- Journal of Biophotonics
- volume
- 13
- issue
- 8
- article number
- e202000076
- publisher
- John Wiley & Sons Inc.
- external identifiers
-
- scopus:85085939754
- pmid:32306512
- ISSN
- 1864-063X
- DOI
- 10.1002/jbio.202000076
- language
- English
- LU publication?
- yes
- id
- c79e6d53-f86f-4e8e-a1b3-246727dad54d
- date added to LUP
- 2020-07-08 12:52:54
- date last changed
- 2024-05-01 13:28:00
@article{c79e6d53-f86f-4e8e-a1b3-246727dad54d,
abstract = {{<p>Avocados are considered very healthy due to the high content mono-unsaturated lipid, essential vitamins and minerals, minimal sugar and no cholesterol and are therefore sometimes referred to as “the perfect fruits”. Avocados, mainly grown in Latin-America, are harvested unripe and sent overseas. However, the ripening process is very difficult to assess visually and tactilely. A tool for precise noninvasive judgment of the status would be valuable as the fruit is too expensive to be cut open unripe or overdue. A white-light source and a light-emitting diode unit with four excitation wavelengths (365, 385, 395, and 405 nm) were used for reflectance and fluorescence spectroscopy in a fiber-coupled set-up for noninvasive monitoring. Twelve non-ripe avocados, with approximately the same size and appearance, were studied and divided into three groups and kept at three different storage conditions; at room temperature, in a refrigerator and a combination of the two. We showed that fluorescence was useful for following the ripening process. A method, which compensates for the spatial variations in spectral properties around a fruit, is described. Remote fluorescence monitoring, intended for orchard use, was also demonstrated. A low-cost device based on fluorescence for avocado ripeness assessment is proposed.</p>}},
author = {{Lin, Xiaobo and Zhang, Han and Hu, Lingna and Zhao, Guangyu and Svanberg, Sune and Svanberg, Katarina}},
issn = {{1864-063X}},
keywords = {{avocado; fluorescence spectroscopy; fruit ripening; noninvasive technique; reflectance spectroscopy}},
language = {{eng}},
number = {{8}},
publisher = {{John Wiley & Sons Inc.}},
series = {{Journal of Biophotonics}},
title = {{Ripening of avocado fruits studied by spectroscopic techniques}},
url = {{http://dx.doi.org/10.1002/jbio.202000076}},
doi = {{10.1002/jbio.202000076}},
volume = {{13}},
year = {{2020}},
}