维生素英语.ppt

Carbohydrate, fat, protein, water, vitamins and trace elements, are six nutrients necessary for the body. World explorer Ferdinand Magellans voyage sailing records have been relating to scurvy. In the long sea journey, the crew often less than a few months, or simply do not eat fresh vegetables and animal foods, So most of the crew suffering from scurvy and incapacity. Some crew members have been dying due and been put ashore to die, but they are miraculously healed, that’s because they had eaten some of the local wild plants and other greenery. 1747, Scottish docor James Lind found fresh oranges and lemons are responsible for this phenomena. After that,Doctor S.king and Alber saint finally separated ascorbic acid from the cabbage, citrus fruits and adrenal glands, which is vitamin C. Chemical Formula：C6H8O6 Physical properties： Colorless crystals, soluble in water, the solution was acidic, sour taste. Chemical properties: Reductive Presence: Fresh fruits and green vegetables Function of Vitamin C （1）Oxidation-reduction reaction in the body, and maintenance of cellInterstitial normal structure； （2） promoting wound healing, to maintain the Normal function of teeth, bones, blood vessels and muscles可用于治疗坏血病及皮肤病、口疮、感冒等。 （3） Help absorb some of the salts and amino acids； （4） Enhanced resistance to infectious diseases, detoxification ； （5） Antioxidants for food, food additives 。 Noting: Adults need approximately 75 minigram daily supplement of vitamin C. To reduce the loss of vitamin C in vegetables,there are some common senses: 1、 Wash vegetables before cutting; 2、 When we fry vegetables, time not too long, fried can be; 3、Do not put in food base when you fry vegetables ； Vitamin-containing food Vitamin preparations Cod liver oil , Vitamin tablets ,Color pepper , Kiwi,Lemon Grapes ,banana ,peaches ,chives,tomato ,carrot,cucumber, cayenne pepper Vitamin A Function: prevent night blindness, dry eye. Deficiency: night blindness Vitamin D Function: Promote the abs