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Title: Impact of UV-C Radiation On Carotenoids Content of Pineapple by-Products (Ananas comusus) Processing Industries
Author: Freitas, A.
Moldão-Martins, M.
Costa, H.S.
Sanches-Silva, A.
Keywords: Composição dos Alimentos
Issue Date: May-2011
Publisher: Instituto Nacional de Saúde Doutor Ricardo Jorge, IP
Abstract: Pineapple is one of the most worldwide processed fruits, originating high amounts of by-products, namely core and rind. In the production of processed fruits there is one important step in order to comply with the food safety legal requirements, which is the fruit decontamination. In the conventional sanitation technique of fruits chlorine is utilised, but it has several disadvantages for human health and for the environment due to the production of secondary compounds. The ultraviolet radiation at a wavelength of 190-280 nm (UV-C) is a non-chemical method, alternative to the use of chlorine, which does not leave residues in the fruit and in the environment. Beyond the sanitizing effect, UV-C radiation can also induce stress in the plant which can promote the biosynthesis of bioactive compounds, namely carotenoids. The aim of the current work was to study the impact of a low dose of UV-C radiation on carotenoids content of pineapple by-products.. The study focused on the pineapple core and rind, and the following carotenoids, -carotene, β-carotene, β-cryptoxanthin, lutein, lycopene, neoxanthin, violaxanthin and zeaxanthin were evaluated. The carotenoids content was determined by ultra performance liquid chromatography (UPLC®). The calibration curve of each carotenoid was done using six concentrations of the standards. For all carotenoids, the coefficient of determination (r2) of the calibration curves was higher than 0.997. The pineapple core had fewer types of carotenoids, and less quantity of each carotenoid, than the pineapple rind. Lutein and -carotene were detected in pineapple rind but not in the core. β-cryptoxanthin, zeaxanthin, violaxanthin, neoxanthin and lycopene were not detected in any pineapple by-product. With respect to the applied UV-C treatment, it induced the production of -carotene and -carotene in pineapple rind but had no significant (P>0.05) impact on lutein, nor on the content of -carotene of pineapple core.
Peer review: yes
Appears in Collections:DAN - Posters/abstracts em congressos internacionais

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