IDEAS home Printed from https://ideas.repec.org/a/gam/jagris/v10y2020i11p493-d433152.html
   My bibliography  Save this article

Effect of Hot-Air and Freeze-Drying on the Quality Attributes of Dried Pomegranate ( Punica granatum L.) Arils During Long-Term Cold Storage of Whole Fruit

Author

Listed:
  • Adegoke Olusesan Adetoro

    (Department of Horticultural Science, Stellenbosch University, Private Bag X1, Stellenbosch 7602, South Africa
    Africa Institute for Postharvest Technology, South African Research Chair in Postharvest Technology, Postharvest Technology Research Laboratory, Faculty of AgriSciences, Stellenbosch University, Private Bag X1, Stellenbosch 7602, South Africa)

  • Umezuruike Linus Opara

    (Africa Institute for Postharvest Technology, South African Research Chair in Postharvest Technology, Postharvest Technology Research Laboratory, Faculty of AgriSciences, Stellenbosch University, Private Bag X1, Stellenbosch 7602, South Africa)

  • Olaniyi Amos Fawole

    (Department of Horticultural Science, Stellenbosch University, Private Bag X1, Stellenbosch 7602, South Africa
    Africa Institute for Postharvest Technology, South African Research Chair in Postharvest Technology, Postharvest Technology Research Laboratory, Faculty of AgriSciences, Stellenbosch University, Private Bag X1, Stellenbosch 7602, South Africa
    Postharvest Research Laboratory, Department of Botany and Plant Biotechnology, University of Johannesburg, P.O. Box 524, Auckland Park, Johannesburg 2006, South Africa)

Abstract

This study investigated the effect of hot-air and freeze-drying on the physicochemical, phytochemical and antioxidant capacity of dried pomegranate arils during long-term cold storage (7 ± 0.3 °C, with 92 ± 3% relative humidity) of whole fruit over a single experiment. Extracted arils were processed at monthly intervals during 12 weeks of cold storage of whole fruit. After the 12-week storage period, hot-air and freeze-dried arils showed the least (3.02) and highest (23.6) total colour difference (TCD), respectively. Hot-air dried arils also contained 46% more total soluble solids (TSS) than freeze-dried arils. During the storage of pomegranate fruit, total phenolic content (TPC) steadily increased from 20.9 to 23.9 mg GAE/100 mL and total anthocyanin content (TAC) increased from 6.91 to 8.77 mg C3gE /100 mL. Similarly, an increase in TPC and TAC were observed for hot-air (9.3%; 13%) and freeze-dried arils (5%; 5%), respectively. However, the radical scavenging activity (RSA) reduced by 8.5 and 17.4% for hot-air and freeze-dried arils, respectively, after 12 weeks of cold storage. Overall, the parameters such as colour, TPC and TAC as well as the lower degradation in RSA stability during storage showed distinct differences in quality when using the freeze-drying method, which is, therefore, recommended.

Suggested Citation

  • Adegoke Olusesan Adetoro & Umezuruike Linus Opara & Olaniyi Amos Fawole, 2020. "Effect of Hot-Air and Freeze-Drying on the Quality Attributes of Dried Pomegranate ( Punica granatum L.) Arils During Long-Term Cold Storage of Whole Fruit," Agriculture, MDPI, vol. 10(11), pages 1-16, October.
    • Handle: RePEc:gam:jagris:v:10:y:2020:i:11:p:493-:d:433152
    as

    Download full text from publisher

    File URL: https://www.mdpi.com/2077-0472/10/11/493/pdf
    Download Restriction: no
    File URL: https://www.mdpi.com/2077-0472/10/11/493/
    Download Restriction: no
    ---><---

    Citations

    Citations are extracted by the CitEc Project, subscribe to its RSS feed for this item.
    as


    Cited by:

    1. Dirk E. Maier & Hory Chikez, 2021. "Recent Innovations in Post-Harvest Preservation and Protection of Agricultural Products," Agriculture, MDPI, vol. 11(12), pages 1-5, December.
    2. Emmanuel Ekene Okere & Ebrahiema Arendse & Alemayehu Ambaw Tsige & Willem Jacobus Perold & Umezuruike Linus Opara, 2022. "Pomegranate Quality Evaluation Using Non-Destructive Approaches: A Review," Agriculture, MDPI, vol. 12(12), pages 1-25, November.

    Corrections

    All material on this site has been provided by the respective publishers and authors. You can help correct errors and omissions. When requesting a correction, please mention this item's handle: RePEc:gam:jagris:v:10:y:2020:i:11:p:493-:d:433152. See general information about how to correct material in RePEc.

    If you have authored this item and are not yet registered with RePEc, we encourage you to do it here. This allows to link your profile to this item. It also allows you to accept potential citations to this item that we are uncertain about.

    We have no bibliographic references for this item. You can help adding them by using this form .

    If you know of missing items citing this one, you can help us creating those links by adding the relevant references in the same way as above, for each refering item. If you are a registered author of this item, you may also want to check the "citations" tab in your RePEc Author Service profile, as there may be some citations waiting for confirmation.

    For technical questions regarding this item, or to correct its authors, title, abstract, bibliographic or download information, contact: MDPI Indexing Manager (email available below). General contact details of provider: https://www.mdpi.com .

    Please note that corrections may take a couple of weeks to filter through the various RePEc services.

    IDEAS is a RePEc service. RePEc uses bibliographic data supplied by the respective publishers.