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Chapter 5 Water Nutrition

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

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Chapter 5 Water Nutrition

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

  2. §1 Introduction 1 Concept • As a nutrient • Controlling the body temperature • Adjusting the pH value • Joining in the metabolism

  3. 2 Ratio in body • Adults: 50-65% • Infants: 70-75% • Muscle: 80%

  4. 3 The Syndrome of water Lose • Thirst: 1% lost (feel to drink) • Dehydrated 10%, function lower • Dehydrated 20%, to death

  5. §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

  6. Metabolic Water

  7. §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

  8. §4 Dielectrics 1 NaCl 2 K+

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