Sonication-mediated modulation of macronutrient structure and digestibility in chickpea

Area of Science:

• Food Science
• Green Technology
• Biotechnology

Background:

• Ultrasound processing is an emerging green technology with potential in food applications.
• Effects of ultrasonication on isolated macromolecules are known, but effects within intact food structures are less understood.
• Physical barriers within whole foods can influence how ultrasound affects cellular components.

Purpose of the Study:

• To investigate the impact of ultrasound processing on starch and protein structure and digestibility within intact chickpea cells.
• To determine if ultrasound processing causes molecular degradation or affects cell structure.
• To understand how ultrasound affects nutrient bioavailability at different scales within food matrices.

Main Methods:

• Intact chickpea cells were subjected to varying ultrasound processing times.
• Structural analysis of starch and protein was performed.
• Digestibility assays were conducted to measure nutrient accessibility.
• Cell wall integrity was examined in relation to sonication duration.

Main Results:

• Digestibility of starch and protein significantly increased with extended ultrasound processing time.
• No significant molecular degradation of starch or protein was observed.
• Increased sonication time led to macro-structural damage of the cell wall.
• Enhanced enzyme accessibility to macronutrients was attributed to cell wall damage.

Conclusions:

• Ultrasound processing enhances macronutrient digestibility in chickpea cells primarily through cell wall disruption.
• Nutrient bioavailability can be modulated by ultrasound without altering the intrinsic properties of starch and protein.
• Ultrasound processing shows minimal impact on whole food structures like seeds but affects nutrient accessibility within cellular components.