<rdf:RDF xmlns:rdf="http://www.openarchives.org/OAI/2.0/rdf/" xmlns:ow="http://www.ontoweb.org/ontology/1#" xmlns:dc="http://purl.org/dc/elements/1.1/" xmlns:ds="http://dspace.org/ds/elements/1.1/" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xmlns:doc="http://www.lyncode.com/xoai" xsi:schemaLocation="http://www.openarchives.org/OAI/2.0/rdf/ http://www.openarchives.org/OAI/2.0/rdf.xsd">
   <ow:Publication rdf:about="oai:digibug.ugr.es:10481/79031">
      <dc:title>Seasonal Changes in Chemical Profile and Antioxidant Activity of Padina pavonica Extracts and Their Application in the Development of Bioactive Chitosan/PLA Bilayer Film</dc:title>
      <dc:creator>Cagalj, Martina</dc:creator>
      <dc:creator>Razola Díaz, María del Carmen</dc:creator>
      <dc:subject>Functional PLA films</dc:subject>
      <dc:subject>Seaweed and chitosan bilayer</dc:subject>
      <dc:subject>Sustainable natural antioxidants</dc:subject>
      <dc:subject>Microwave-assisted extraction</dc:subject>
      <dc:description>Seaweeds are a potentially sustainable source of natural antioxidants that can be used in&#xd;
the food industry and possibly for the development of new sustainable packaging materials with the&#xd;
ability to extend the shelf-life of foods and reduce oxidation. With this in mind, the seasonal variations&#xd;
in the chemical composition and antioxidant activity of brown seaweed (Padina pavonica) extracts were&#xd;
investigated. The highest total phenolic content (TPC) and antioxidant activity (measured by ferric&#xd;
reducing/antioxidant power (FRAP), 2,2-diphenyl-1-picrylhydrazyl (DPPH) radical scavenging,&#xd;
and oxygen radical absorbance capacity (ORAC)) were found for P. pavonica June extract. The&#xd;
TPC of 26.69   1.86 mg gallic acid equivalent/g, FRAP of 352.82   15.41  mole Trolox equivalent&#xd;
(TE)/L, DPPH of 52.51   2.81% inhibition, and ORAC of 76.45   1.47  mole TE/L were detected.&#xd;
Therefore, this extract was chosen for the development of bioactive PLA bilayer film, along with&#xd;
chitosan. Primary or quaternary chitosan was used as the first layer on polylactic acid (PLA) films.&#xd;
A suspension of chitosan particles with entrapped P. pavonica extract was used as the second layer.&#xd;
X-ray photoelectron spectroscopy confirmed the presence of layers on the material surface. The&#xd;
highest recorded antioxidant activity of the newly developed films was 63.82% inhibition. The&#xd;
developed functional films exhibited antifogging and antioxidant properties, showing the potential&#xd;
for application in the food industry.</dc:description>
      <dc:date>2023-01-16T13:42:04Z</dc:date>
      <dc:date>2023-01-16T13:42:04Z</dc:date>
      <dc:date>2022-11-28</dc:date>
      <dc:type>info:eu-repo/semantics/article</dc:type>
      <dc:identifier>Cagalj, M... [et al.]. Seasonal Changes in Chemical Profile and Antioxidant Activity of Padina pavonica Extracts and Their Application in the Development of Bioactive Chitosan/PLA Bilayer Film. Foods 2022, 11, 3847. [https://doi.org/10.3390/foods11233847]</dc:identifier>
      <dc:identifier>https://hdl.handle.net/10481/79031</dc:identifier>
      <dc:identifier>10.3390/foods11233847</dc:identifier>
      <dc:language>eng</dc:language>
      <dc:rights>http://creativecommons.org/licenses/by/4.0/</dc:rights>
      <dc:rights>info:eu-repo/semantics/openAccess</dc:rights>
      <dc:rights>Atribución 4.0 Internacional</dc:rights>
      <dc:publisher>MDPI</dc:publisher>
   </ow:Publication>
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