福州大学：《食品化学》课程教学课件（PPT讲稿）Polymorphism

POLYMORPHISM

POLYMORPHISM

Polymorphism The occurrence of several different crystal forms for a same compound

Polymorphism The occurrence of several different crystal forms for a same compound

Packing Types of Fatty Acids and Position

Packing Types of Fatty Acids and Position

Fatty Acid Crystal Structure

Fatty Acid Crystal Structure

Cross-Sectional Structures of Triglycerides Freedom of molecular motion Alpha Beta Prime Beta

Cross-Sectional Structures of Triglycerides Alpha Beta Prime Beta Freedom of molecular motion

Crystal forms 6 b 209 Triclinic Orthorhombic Hexagonal

a g Hexagonal Triclinic Orthorhombic a b b c b c c b a a 120º Crystal forms

Space Arrangements of Triglyceride Crystals Tuning fork form Chair form

Space Arrangements of Triglyceride Crystals 1 1 2 2 3 3 Tuning fork form Chair form

Double Chain Length Structures of Triglycerides Alpha Beta-Prime Beta (Vertical tuning fork) (Tilted tuning fork) (Stacked chair)

Double Chain Length Structures of Triglycerides Alpha Beta-Prime Beta (Vertical tuning fork) (Tilted tuning fork) (Stacked chair) D D D

Transformation of Crystal Structures Simple Collapse Cataclysmic Chain shift

Transformation of Crystal Structures Simple Collapse Cataclysmic Chain shift

Types of Fatty Acids and Positions for Double Chain Length

Types of Fatty Acids and Positions for Double Chain Length