南京师范大学：《营养学》课程PPT教学课件（英文版）第五章 Lipids and Its Function

Chapter2 Lipids & Its Function Professor, Dr. Jin Bangquan Department of Food Science & Nutrition NJNU

Chapter2 Lipids & Its Function Professor, Dr. Jin Bangquan Department of Food Science & Nutrition NJNU

§1 Concept Lipids is as Fat Oil Lipid

§1 Concept Lipids is as Fat Oil Lipid

1 Neutral Fat Glycerin + Fatty Acids (FA) 1.1 Triglyceride, Diglyceride, Olyglyceride 1.2 C-chain of FA: short, Middle, Longer

1 Neutral Fat Glycerin + Fatty Acids (FA) 1.1 Triglyceride, Diglyceride, Olyglyceride 1.2 C-chain of FA: short, Middle, Longer

 Neutral fat in food Triglyceride is by 95% Diglyceride + Olyglyceride is by 5%  Neutral fat in human body Triglyceride is by 99%

 Neutral fat in food Triglyceride is by 95% Diglyceride + Olyglyceride is by 5%  Neutral fat in human body Triglyceride is by 99%

2 Lipids Containing: Phospholipids Glycolipids Sterols Lipoprotein P21-22

2 Lipids Containing: Phospholipids Glycolipids Sterols Lipoprotein P21-22

3 Fatty Acids (FA) 3.1 The C-chain length 3.1.1 Longer : > 14 C-chain 3.1.2 Middle: 8-12 C-chain 3.1.3 Shorter: < 6 C-chain 3.1.4 Free Fatty Acids (FFA) 3-5 C-chain P20-21 和 动 物 组 织 含 有 的 不 饱 和 脂 肪 酸 主 要 为 软 油 酸 ( 1 6 和 动 物 组 织 含 有 的 不 饱 和 脂 肪 酸 主 要 为 软 油 酸 ( 1 6

3 Fatty Acids (FA) 3.1 The C-chain length 3.1.1 Longer : > 14 C-chain 3.1.2 Middle: 8-12 C-chain 3.1.3 Shorter: < 6 C-chain 3.1.4 Free Fatty Acids (FFA) 3-5 C-chain P20-21 和 动 物 组 织 含 有 的 不 饱 和 脂 肪 酸 主 要 为 软 油 酸 ( 1 6 和 动 物 组 织 含 有 的 不 饱 和 脂 肪 酸 主 要 为 软 油 酸 ( 1 6

3.2 Saturation 3.2.1 Saturated Fatty Acid (FA) 3.2.2 Monounsaturated Fatty Acid (M-UFA) 3.2.3 Polyunsaturated Fatty Acid (PUFA)

3.2 Saturation 3.2.1 Saturated Fatty Acid (FA) 3.2.2 Monounsaturated Fatty Acid (M-UFA) 3.2.3 Polyunsaturated Fatty Acid (PUFA)

3.3 FA Structure in Space 3.3.1 Cis-fatty Acid 3.3.2 Trans -fatty Acid

3.3 FA Structure in Space 3.3.1 Cis-fatty Acid 3.3.2 Trans -fatty Acid

3.4 Essential fatty acid (EFA) Linoleate (18:2△) n-6,9 all cis√ Linolenate (18:3△) (α) n-3,6,9 all cis√ (γ )n-6,9,12 all cis Arachidonate (20:4 △) n- 6,9,12,15 all cis Others: 软油酸(16:1△9) 油酸(18:1△9) In Nutrition: n-3 & n-6 (or ω-3, ω-6) P21

3.4 Essential fatty acid (EFA) Linoleate (18:2△) n-6,9 all cis√ Linolenate (18:3△) (α) n-3,6,9 all cis√ (γ )n-6,9,12 all cis Arachidonate (20:4 △) n- 6,9,12,15 all cis Others: 软油酸(16:1△9) 油酸(18:1△9) In Nutrition: n-3 & n-6 (or ω-3, ω-6) P21

§2 Composition & Ratio in Body 1 Chemical: C、H、O (Mainly) N、S、P (Less) 2 Ratio: 10-20% in body most in fatty tissue Lipids: 5% 3 Better Sources: Vegetable oil; eg: corn oil, sesame oil

§2 Composition & Ratio in Body 1 Chemical: C、H、O (Mainly) N、S、P (Less) 2 Ratio: 10-20% in body most in fatty tissue Lipids: 5% 3 Better Sources: Vegetable oil; eg: corn oil, sesame oil