Ultrasound-assisted extraction of mucilaginous seed hydrocolloids: Physicochemical properties and food applications

Mucilaginous seeds are novel sources of hydrocolloids with great functionalities. However, conventionally extracted mucilage is not of high quality due to the physical damage of seeds and the presence of seed particles in mucilage. Ultrasound-assisted extraction (UAE) of mucilage is a cost-effective...

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Bibliographic Details
Published in:Trends in food science & technology 2021-12, Vol.118, p.356-361
Main Authors: Hedayati, Sara, Niakousari, Mehrdad, Babajafari, Siavash, Mazloomi, Seyed Mohammad
Format: Article
Language:English
Subjects:
Antioxidants
Biological activity
Chemical composition
Extraction
Gums
Hydrocolloids
Impurities
Molecular structure
Mucilage
Mucilaginous seeds
Physicochemical properties
Process parameters
Seeds
Sonication
Ultrasonic imaging
Ultrasound
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Summary:Mucilaginous seeds are novel sources of hydrocolloids with great functionalities. However, conventionally extracted mucilage is not of high quality due to the physical damage of seeds and the presence of seed particles in mucilage. Ultrasound-assisted extraction (UAE) of mucilage is a cost-effective and promising application of power ultrasound. In this review, the recent findings about extraction yield, chemical composition, color, apparent and intrinsic viscosity, emulsifying properties and antioxidant activity of mucilage obtained from seeds by conventional extraction (CE) and UAE were investigated and compared with each other. Key findings and Conclusions: The results revealed that the UAE system had many positive effects such as increase in the extraction yield, lightness, emulsifying properties, antioxidant activity, and decrease in the impurities. However, the efficiency of UAE in improving the functional properties and bioactivity of mucilage seed gums was influenced by process conditions such as power, amplitude intensity, frequency, sonication time, temperature, and the intrinsic attributes of mucilage such as molecular structure. Therefore, in order to accomplish optimum bioactivity and functioning of seed gums, we should determine and apply optimized processing parameters. •Conventional isolation of mucilage is a time and energy consuming process.•Ultrasound assisted extraction (UAE) improves the quality of mucilage.•Sonication conditions should be optimized to obtain high quality mucilage.•Mucilage extraction yield in UAE is significantly higher than conventional extraction.
ISSN:0924-2244
1879-3053
DOI:10.1016/j.tifs.2021.10.022