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Improving the physical properties of fish gelatin by high hydrostatic pressure (HHP) and ultrasonication (US)
Author(s) -
Sezer Purlen,
Okur Ilhami,
Oztop Mecit Halil,
Alpas Hami
Publication year - 2020
Publication title -
international journal of food science and technology
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.831
H-Index - 96
eISSN - 1365-2621
pISSN - 0950-5423
DOI - 10.1111/ijfs.14487
Subject(s) - gelatin , sonication , hydrostatic pressure , fourier transform infrared spectroscopy , rheology , chemistry , fish <actinopterygii> , materials science , chemical engineering , chromatography , composite material , biochemistry , fishery , physics , biology , engineering , thermodynamics
Summary In this study, it was aimed to improve the physical properties of fish gelatin by using high hydrostatic pressure (HHP) and ultrasonication (US). Gelatin solutions were exposed to different pressures and ultrasonication separately and gelled afterwards. The physicochemical measurements based on gel strength, turbidity and rheology experiments showed that HHP treatment on fish and bovine gelatin stabilized the gelatin network by organising the structure and reducing the free volume. Both processing methods (HHP and US) increased the gel strength significantly ( P < 0.05) compared with non‐treated samples. Fourier‐transform infrared spectroscopy (FTIR) results indicated that conformations of amino acids changed after the treatments. Furthermore, US treatment was shown to destroy the gelatin network, change the gelation mechanism and decreased the degree of aggregation. Both treatments improved the gel characteristics as gel strength, gelling and melting temperatures of the fish gelatin. At the end, the best combination for fish gelatin among HHP and US treatments was found as 400 MPa–10 °C–15 min pressurisation.