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Lecture 1 1-10-10

Lecture 1 1-10-10 - Particle size and shape Particle shape...

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1. Phase transition is when a state of matter changes to another state such as solid, liquid and gaseous. Physical properties may change such as the volume of water from liquid to steam. Glass transition refers to the transformation of a glass-forming liquid into a glass, which usually occurs upon rapid cooling. 2. Thixotropic fluids are thick (viscous) under normal conditions, but flow (become thin, less viscous) over time when shaken, agitated, or otherwise stressed; Sweetened condensed milk; They display a decrease in viscosity over time at a constant shear rate 3. Primary: Hardness, Cohesiveness, Viscosity, Elasticity, Adhesiveness,
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Unformatted text preview: Particle size and shape, Particle shape and orientation, Moisture Content, Fat Content; Secondary: Brittleness, Chewiness, Gumminess; Oiliness, Greasiness 4. Mass of raw materials in = Mass of products and wastes out + Mass of stored materials + Losses; This equation is important in determining process yields and efficiencies. 5. In thermal processes such as retorting, fluid flow can affect heat transfer, such as the time required to heat the canned contents to a certain temperature, which could result in undercooked or overcooked foods....
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