Ahmad, Mehraj and Bushra, Rani and Ritzoulis, Christos and Meigui, Huang and Jin, Yongcan and Xiao, Huining (2024) Molecular characterisation, gelation kinetics and rheological enhancement of ultrasonically extracted triggerfish skin gelatine. Journal of Molecular Structure, 1296 (2). ISSN 0022-2860, DOI https://doi.org/10.1016/j.molstruc.2023.136931.
Full text not available from this repository.Abstract
Improper fish skin disposal raises environmental and health concerns, highlighting the need for sustainable waste management. Turning discarded fish skins into marketable products like gelatine benefits both the economy and ecology. This study aims to investigate the feasibility of employing ultrasonic technique for the recovery of gelatine from the collagen-rich titan triggerfish skin following a preliminary pretreatment. The applied ultrasonic parameters included 100 W power, 40 kHz frequency, and a temperature held at 50 degrees C over a 3 h duration, resulting in a maximum gelatine yield of 20.5 +/- 0.3 % (w/w) based on wet weight measurements. The biochemical and functional attributes of the extracted triggerfish gelatine (TFG) were compared to those of commercial bovine gelatine (CBG). TFG exhibited a substantial protein content (92.2 +/- 0.2 %), along with low levels of moisture (7.4 +/- 0.1 %), fat (0.2 +/- 0.1 %), and ash (0.2 +/- 0.04 %). SDS-PAGE showed that the primary elements of TFG were beta- and alpha-chains (MW similar to 150 to 220 kDa). While both gelatine types displayed predominant FTIR bands in the amide area (amide-I, amide-II and amide-III), TFG spectra, however, suggested that the ultrasonic treatment had no discernible effect on its triple helical structure. Significant variations in the gross amino acid profiles were found in both TFG and CBG. Nevertheless, compared to CBG, TFG had lower levels of proline and hydroxyproline residues. Additionally, TFG exhibited relatively lower gel strength; however, the optimal inclusion of microbial transglutaminase (MTGase) increased its gel strength (394 +/- 4 g) and melting temperature (T-mp = 31.9 degrees C), while reducing gelation time (<50 min at 20 degrees C). Functionally, TFG demonstrated higher foaming but marginally lower emulsifying properties than CBG. The finding underscores the potential of ultrasonication to mitigate fish skin waste emissions and efficiently retrieve high-quality gelatine within a shorter time frame.
| Item Type: | Article |
|---|---|
| Funders: | College of Light Industry and Food, Nanjing Forestry University [163105084], College of Light Industry and Food, Nanjing Forestry University [163105102], Chinese Ministry of Science and Technology 's Foreign Youth Talent Program [QN2021014015L] |
| Uncontrolled Keywords: | Gelatine; Triggerfish skin waste; Gel strength; Gelation kinetics; Ultrasonication |
| Subjects: | S Agriculture > SH Aquaculture. Fisheries. Angling |
| Divisions: | Faculty of Science > Department of Chemistry |
| Depositing User: | Ms. Juhaida Abd Rahim |
| Date Deposited: | 05 Jul 2024 02:53 |
| Last Modified: | 05 Jul 2024 02:53 |
| URI: | http://eprints.um.edu.my/id/eprint/44303 |
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