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Biosensors 2015, 5(3), 367-397;

Use of Time-Resolved Fluorescence to Monitor Bioactive Compounds in Plant Based Foodstuffs

Food & Life Sciences, School of Science, Engineering and Technology, University of Abertay Dundee, Bell Street, Dundee DD1 1HG, UK
Department of Food Science, University of Udine, Via Sondrio 2/A, 33100 Udine, Italy
HORIBA Jobin Yvon IBH, 133 Finnieston Street, Glasgow G3 8HB, UK
Author to whom correspondence should be addressed.
Academic Editor: A. Sheila Holmes-Smith
Received: 30 April 2015 / Revised: 9 June 2015 / Accepted: 15 June 2015 / Published: 26 June 2015
(This article belongs to the Special Issue Fluorescence Based Sensing Technologies)
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The study of compounds that exhibit antioxidant activity has recently received much interest in the food industry because of their potential health benefits. Most of these compounds are plant based, such as polyphenolics and carotenoids, and there is a need to monitor them from the field through processing and into the body. Ideally, a monitoring technique should be non-invasive with the potential for remote capabilities. The application of the phenomenon of fluorescence has proved to be well suited, as many plant associated compounds exhibit fluorescence. The photophysical behaviour of fluorescent molecules is also highly dependent on their microenvironment, making them suitable probes to monitor changes in pH, viscosity and polarity, for example. Time-resolved fluorescence techniques have recently come to the fore, as they offer the ability to obtain more information, coupled with the fact that the fluorescence lifetime is an absolute measure, while steady state just provides relative and average information. In this work, we will present illustrative time-resolved measurements, rather than a comprehensive review, to show the potential of time-resolved fluorescence applied to the study of bioactive substances. The aim is to help assess if any changes occur in their form, going from extraction via storage and cooking to the interaction with serum albumin, a principal blood transport protein. View Full-Text
Keywords: anthocyanin; betalain; chlorophyll; curcumin; fluorescence lifetime; lycopene anthocyanin; betalain; chlorophyll; curcumin; fluorescence lifetime; lycopene

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This is an open access article distributed under the Creative Commons Attribution License which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited (CC BY 4.0).

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Lemos, M.A.; Sárniková, K.; Bot, F.; Anese, M.; Hungerford, G. Use of Time-Resolved Fluorescence to Monitor Bioactive Compounds in Plant Based Foodstuffs. Biosensors 2015, 5, 367-397.

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