Food Properties
Summary
Food properties span the physical, chemical and structural attributes that govern a product’s behaviour during processing, storage and consumption. Physical characteristics such as particle size, shape, density and porosity influence flowability, mixing and heat-and-mass transfer. Rheological properties—viscosity, elasticity and yield stress—control the texture of purees, doughs and gels, while surface-active components such as proteins, polysaccharides and lipids determine interfacial phenomena in emulsions and foams. Water activity underpins microbial stability and biochemical reactivity, and optical properties affect perceived colour and appearance. Thermal features, including specific heat and thermal conductivity, dictate responses to heating and freezing. At a molecular scale, protein denaturation, starch gelatinisation and lipid oxidation reshape microstructure and functional performance, driving innovations in ingredient design and processing technologies. Together, these varied yet interlinked properties provide a framework for tailoring shelf life, sensory quality and nutritional impact across global food systems.
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Food Properties publication trend
The graph below shows the total number of articles in food properties across all publications each year (not limited to Nature Index journals).
Technical terms
Rheological properties: Characteristics that describe how a material flows or deforms under applied stress.
Emulsion: A dispersion of one immiscible liquid (e.g., oil) as small droplets within another (e.g., water), stabilised by surface-active agents.
Foam stability: The ability of a foam to resist drainage, coalescence and collapse over time.
Water activity: The ratio of a food’s vapour pressure to that of pure water, indicating free water availability for microbial growth.
Sphericity: A measure of how closely a particle’s shape approaches that of a perfect sphere, influencing packing and flow.
Overrun: The percentage volume increase due to air incorporation in whipped or aerated products.
Particle size distribution: The range and frequency of particle diameters in a sample, affecting texture, solubility and stability.
References
- Engineering Properties of Foods.
- Quantitative image analysis of protein foam microstructure and its correlation with rheological properties: Egg white foam. Food Hydrocolloids (2022).
- Role of the pea protein aggregation state on their interfacial properties. Journal of Colloid and Interface Science (2023).
- Innovative and Sustainable Technologies to Enhance the Oxidative Stability of Vegetable Oils. Sustainability (2022).
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