南京师范大学：《营养学》课程PPT教学课件（英文版）第七章 Water Nutrition

Chapter 5 Water Nutrition Professor. Dr. Jin BQ Department of Food Science & Nutrition NJNU

Chapter 5 Water Nutrition Professor. Dr. Jin BQ Department of Food Science & Nutrition NJNU

§1 Introduction 1 Concept ◼ As a nutrient ◼ Controlling the body temperature ◼ Adjusting the pH value ◼ Joining in the metabolism

§1 Introduction 1 Concept ◼ As a nutrient ◼ Controlling the body temperature ◼ Adjusting the pH value ◼ Joining in the metabolism

2 Ratio in body ◼ Adults: 50-65% ◼ Infants: 70-75% ◼ Muscle: 80%

2 Ratio in body ◼ Adults: 50-65% ◼ Infants: 70-75% ◼ Muscle: 80%

3 The Syndrome of water Lose ◼ Thirst: 1% lost (feel to drink) ◼ Dehydrated 10%, function lower ◼ Dehydrated 20%, to death

3 The Syndrome of water Lose ◼ Thirst: 1% lost (feel to drink) ◼ Dehydrated 10%, function lower ◼ Dehydrated 20%, to death

§2 Sources & Excretion 1 Sources 2.1 Food 2.2 Drink 2. 3 Metabolism in body MW(g)=0.4prot.(g)+0.6CH2O(g)+ 1.07fat(g) 2 Excretion: Urine, Feces, Sweat, Respiration 3 Requirement : Adults - 1.5L/d.p

§2 Sources & Excretion 1 Sources 2.1 Food 2.2 Drink 2. 3 Metabolism in body MW(g)=0.4prot.(g)+0.6CH2O(g)+ 1.07fat(g) 2 Excretion: Urine, Feces, Sweat, Respiration 3 Requirement : Adults - 1.5L/d.p

Percentage of Water Found in Foods 99% 100% 90% JaeM 86% 75% 80% 台 60% 39% 37% 40% 20% 15% 0% Cucumber Carrote Oranges Egge Bread Hard Cheese Margarine Type of Foods

Metabolic Water

Metabolic Water

§3 Stable Control of Liquid 1 Kidney: Water maintaining 2 Hypothalamus: Water Intake - ADH lost> 2% 3 Water balance 4 Short of water 5 Environment such as air temperature

§3 Stable Control of Liquid 1 Kidney: Water maintaining 2 Hypothalamus: Water Intake - ADH lost> 2% 3 Water balance 4 Short of water 5 Environment such as air temperature

§4 Dielectrics 1 NaCl 2 K+

§4 Dielectrics 1 NaCl 2 K+