The Extraction, Characterization and Application of Functional Ingredients from Agri-Food Wastes and By-Products

A special issue of Foods (ISSN 2304-8158). This special issue belongs to the section "Nutraceuticals, Functional Foods, and Novel Foods".

Deadline for manuscript submissions: 15 August 2024 | Viewed by 1225

Special Issue Editors


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Guest Editor
Laboratory for Drying Technologies and Monitoring of Biologically Active Compounds, Department of Food Engineering, Faculty of Food Technology and Biotechnology, University of Zagreb, Zagreb, Croatia
Interests: plant bioactive compounds; advanced extraction techniques; chromatography methods; microencapsulation techniques; valorization of agrofood industry by-products; antioxidants; polyphenols; pigments; fruit and herb processing; functional food
Special Issues, Collections and Topics in MDPI journals

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Guest Editor
Section for Food Plant Design, Department of Food Engineering, Faculty of Food Technology and Biotechnology, University of Zagreb, Zagreb, Croatia
Interests: bioactive ingredients; antioxidants; vegetable oils; plant-based protein; by-products valorization; cryogenic grinding; supercritical extraction
Special Issues, Collections and Topics in MDPI journals

Special Issue Information

Dear Colleagues,

The food industry produces large quantities of waste and by-products that are rich in bioactive compounds such as polyphenols, carotenoids, phytosterols, fatty acids, aromatic compounds, etc., which can be used as functional ingredients for the preparation of food and pharmaceutical products. To take advantage of these benefits, advanced extraction techniques have gained importance over conventional methods in recent years. These techniques, which are influenced by various extraction parameters and matrix-related factors, need to be carefully optimized in order to increase efficiency and obtain targeted bioactive compounds. The valorization of agri-food waste and by-products can be achieved through advanced drying technologies that can extend the shelf life of perishable products, facilitate the preservation of bioactive compounds, and can be processed into a stable value-added product. The aim of this Special Issue is therefore to present the latest research findings on the valorization of agri-food processing waste and by-products using advanced methods for the extraction, isolation, and characterization of bioactive compounds. We invite contributions which present findings on extraction methods, optimization strategies, and the evaluation of bioactive compounds, with a focus on practical applications in sustainable food practices.

Dr. Sandra Pedisić
Prof. Dr. Sandra Balbino
Guest Editors

Manuscript Submission Information

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Submitted manuscripts should not have been published previously, nor be under consideration for publication elsewhere (except conference proceedings papers). All manuscripts are thoroughly refereed through a single-blind peer-review process. A guide for authors and other relevant information for submission of manuscripts is available on the Instructions for Authors page. Foods is an international peer-reviewed open access semimonthly journal published by MDPI.

Please visit the Instructions for Authors page before submitting a manuscript. The Article Processing Charge (APC) for publication in this open access journal is 2900 CHF (Swiss Francs). Submitted papers should be well formatted and use good English. Authors may use MDPI's English editing service prior to publication or during author revisions.

Keywords

  • bioactive compounds
  • agri-food waste and by-products
  • advanced and conventional extraction techniques
  • characterization of bioactive compounds
  • application of functional ingredients
  • drying technologies
  • biological activities
  • functional foods

Published Papers (1 paper)

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Research

29 pages, 5706 KiB  
Article
Bioactive Potential of Olive Mill Waste Obtained from Cultivars Grown in the Island of Malta
by Frederick Lia and Karen Attard
Foods 2024, 13(8), 1152; https://doi.org/10.3390/foods13081152 - 10 Apr 2024
Viewed by 889
Abstract
This study explores the bioactive potential of olive mill waste derived from cultivars grown in the Maltese Islands through various analytical approaches. Cell culture, cell staining, allelopathic assays, shrimp brine lethality assays, and HPLC analysis were conducted to assess the efficacy and bioactivity [...] Read more.
This study explores the bioactive potential of olive mill waste derived from cultivars grown in the Maltese Islands through various analytical approaches. Cell culture, cell staining, allelopathic assays, shrimp brine lethality assays, and HPLC analysis were conducted to assess the efficacy and bioactivity of the extracts using different treatments, including methanolic extraction, acid, and alkaline hydrolysis. Notably, the results from cell lines revealed that NB4r2 cells exhibited high susceptibility to the tested extracts, with the lowest IC50 recorded after 72 h of exposure. Notably, the ‘Bajda’ cultivar displayed the most effectiveness, particularly with acid hydrolysis. In allelopathic assays, higher concentrations of ‘Malti’, ‘Bidni’, and ‘Bajda’ extracts significantly inhibited lettuce seed germination. Similarly, in the brine shrimp lethality assay, higher concentrations led to increased mortality rates of Artemia salina, though rates decreased at lower concentrations. The identification of phenolic compounds found in olive mill waste was conducted using high-performance liquid chromatography (HPLC) with the use of internal standards. The identification revealed a variety of compounds, with 3-hydroxytyrosol and oleacein being present in high abundance in nearly all hydrolyzed and methanolic extracts, whereas gallic acid was found to be the least abundant. These findings highlight the rich bioactive potential of olive mill waste and provide insights into its applications in pharmaceuticals, nutraceuticals, and agriculture, emphasizing the importance of further research to fully exploit these valuable resources. Full article
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