Utilize este identificador para referenciar este registo: http://hdl.handle.net/10400.14/10006
Título: Effect of technological processing upon the antioxidant capacity of aromatic and medicinal plant infusions: From harvest to packaging
Autor: Gião, Maria S.
Pereira, Cláudia I.
Pintado, M. E.
Malcata, F. Xavier
Palavras-chave: ABTS
Total phenolics
Fresh plant
Frozen plant
Packed plant
Stored plant
Data: 2013
Editora: Elsevier
Citação: GIÃO, Maria S... [et al.] - Effect of technological processing upon the antioxidant capacity of aromatic and medicinal plant infusions: From harvest to packaging. LWT - Food Science and Technology. Vol. 50, n.º 1 (2013), p. 320-325
Resumo: Antioxidants are secondary metabolites in plants, designed to protect them from abiotic stress; however, they may also improve one’s general health, following regular ingestion. Since most foods from plant origin are consumed only after processing and formulation, the final activity exhibited by their antioxidants may be rather different from that in the original plant. Ten plants empirically used in Portugal in traditional medicine were accordingly studied e agrimony (Agrimonia eupatoria), eucalyptus (Eucalyptus globulus), walnut-tree (Juglans regia), myrtle (Myrtus communis), raspberry (Rubus idaeus), sage (Salvia sp.), savory (Satureja montana), sweet-amber (Hypericum androsaemum), thyme (Thymus vulgaris) and yarrow (Achillea millefolium), for total antioxidant capacity and total phenolic content. Significant variations were found between fresh and frozen forms: most plants decreased those features by 30e80 %. However, weather conditions prevailing during plant growth also had a significant impact, besides postharvest storage conditions e especially in the case of antioxidant capacity. Typically, a decrease occurred throughout processing and storage, which was maximum for myrtle and minimum for yarrow. The results of this research are useful in attempts to preserve the antioxidant content of plant-derived foods, or of plant additives in foods, via rational manipulation of processing conditions after harvest and throughout storage.
Peer review: yes
URI: http://hdl.handle.net/10400.14/10006
Versão do Editor: doi:10.1016/j.lwt.2012.05.007
Aparece nas colecções:CBQF - Artigos em revistas internacionais com Arbitragem / Papers in international journals with Peer-review

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