Characteristics and gel properties of gelatin from goat skin as influenced by alkaline-pretreatment conditions

Sulaiman Mad-Ali, Soottawat Benjakul, Thummanoon Prodpran, Sajid Maqsood

    Research output: Contribution to journalArticlepeer-review

    16 Citations (Scopus)

    Abstract

    Characteristics and properties of gelatin from goat skin pretreated with NaOH solutions (0.50 and 0.75 M) for various times (1 to 4 days) were investigated. All gelatins contained α-chains as the predominant component, followed by β-chain. Gelling and melting temperatures of those gelatins were 23.02°C to 24.16°C and 33.07°C to 34.51°C, respectively. Gel strength of gelatins increased as NaOH concentration and pretreatment time increased (p<0.05). Pretreatment for a longer time yielded gelatin with a decrease in L∗- value but an increase in b∗-value. Pretreatment of goat skin using 0.75 M NaOH for 2 days rendered the highest yield (15.95%, wet weight basis) as well as high gel strength (222.42 g), which was higher than bovine gelatin (199.15 g). Gelatin obtained had the imino acid content of 226 residues/1,000 residues and the gelatin gel had a fine and ordered structure. Therefore, goat skin gelatin could be used as a potential replacer of commercial gelatin.

    Original languageEnglish
    Pages (from-to)845-854
    Number of pages10
    JournalAsian-Australasian Journal of Animal Sciences
    Volume29
    Issue number6
    DOIs
    Publication statusPublished - Jun 2016

    Keywords

    • Alkaline
    • Gel strength
    • Gelatin
    • Goat
    • Pretreatment
    • Skin

    ASJC Scopus subject areas

    • Food Science
    • Animal Science and Zoology
    • Engineering(all)

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