The Effect of Lyophilized Coconut Mesocarp — Aqueous and Ethanol Phenolic Extracts on the Gel Quality of Tilapia Surimi

ABSTRACT

The high-performance liquid chromatography with dual Agilent jet stream electrospray ionization- quadrupole time of flight-mass spectrometry method enabled the identification of 10 and 13 phenolic compounds from lyophilized aqueous and 60% ethanol extracts of coconut husk. Different compounds such as catechin, 4-methoxy cinnamic acid, salicin, chlorogenic acid, naringins, madecassic acid, myricetin and quercetin were detected. The effect of extracts at different levels on the gel properties of tilapia surimi were studied. An increase in the gel strength, textural properties and water holding capacity of surimi gels was observed at 0.05% of aqueous and 0.075% of ethanol extracts. Higher concentrations of both extracts had a negative effect on the gel strength of surimi gels. Thermal transition of myosin tail of ethanol extract treated gels ranged in 64–66°C. As a result, at an optimal ratio, coconut husk extracts can improve the quality of freshwater fish surimi gel.

KEYWORDS:

• Surimi
• mesocarpic extract
• gel strength
• thermal stability

Acknowledgments

The authors would like to thank the Director, ICAR-Central Institute of Fisheries Education, Mumbai, Naik Oceanic Exports (Taloja, Mumbai), SAIF (IIT, Mumbai) and ICAR-CIRCOT (Mumbai), STIC (CUSAT, Cochin) for providing the facilities to conduct the research.

Disclosure statement

No potential conflict of interest was reported by the author(s).

Author contributions

M. Bhargavi Priyadarshini performed the experiments and data collection; Ramakrishna Reddy contributed to analysis of data; Amjad Khansaheb Balange and K.A. Martin Xavier conceived and designed the experiments; H Sanath Kumar collected the data; Binay Bhushan Nayak analysed the data of the activity. All authors have made a substantial contribution to the work and approved it for publication.

Funding

The funding support for the authors was received from the Indian Council of Agricultural Research (ICAR)-Central Institute of Fisheries Education (CIFE), Mumbai.