| Changes in the structure and antioxidant properties of onions by high pressure treatment. | |
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MedLine Citation:
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PMID: 23370723 Owner: NLM Status: Publisher |
Abstract/OtherAbstract:
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Onions have antioxidant properties and they are an important source of bioactive compounds such as phenols. The aim of this work was to study the effect of high hydrostatic pressure (HHP) (100-600 MPa/1-3 min/25 °C) on the microstructure and antioxidant properties of onions (cv. Doux) and its relationship with changes in the extractability of potential health-related compounds. Cryo scanning electron microscopy was used to study the microstructure. Vitamin C, total phenolic content and antioxidant activity (DPPH˙, ABTS˙(+), FRAP) were also analyzed. Tonoplast, plasmalemma and cell walls were affected by the HHP treatment and it favored the diffusion of the cellular content to the intercellular spaces. Vitamin C did not show significant changes, whereas the extracted phenolic content and antioxidant activity increased at pressures of 300 or 600 MPa. Therefore, it could be concluded that HHP produced changes in membrane permeability and disruption of cell walls favoring the release of phenolic compounds from tissue and, in consequence, improving their extractability. |
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Authors:
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José Luis Vázquez-Gutiérrez; Lucía Plaza; Isabel Hernando; Concepción Sánchez-Moreno; Amparo Quiles; Begoña de Ancos; M Pilar Cano |
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Publication Detail:
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Type: JOURNAL ARTICLE Date: 2013-1-31 |
Journal Detail:
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Title: Food & function Volume: - ISSN: 2042-650X ISO Abbreviation: Food Funct Publication Date: 2013 Jan |
Date Detail:
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Created Date: 2013-2-1 Completed Date: - Revised Date: - |
Medline Journal Info:
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Nlm Unique ID: 101549033 Medline TA: Food Funct Country: - |
Other Details:
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Languages: ENG Pagination: - Citation Subset: - |
Affiliation:
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Group of Food Microstructure and Chemistry, Department of Food Technology, Universitat Politècnica de València, Camino de Vera s/n, 46022 Valencia, Spain. jovazgu@upvnet.upv.es. |
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From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine
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