The temperature in summer is always changeable, and it will be hot enough to die at noon. But when the typhoon blows, it makes you feel that you have returned to the "autumn night" overnight. Have you ever wondered why people's body temperature can always be constant at around 37 no matter how the ambient temperature changes? The body, skin and internal organs all have their own temperatures. Everyone's temperature is different, but they are all around 37. Relying on the advanced thermoregulation system, human beings can survive in natural selection. A normal person's body temperature will fluctuate slightly within 24 hours a day, and the temperature difference at different times can be 0.6 degrees. "The body temperature is the lowest at 6 o'clock in the morning and the highest at 4 o'clock in the afternoon. Women have a slightly higher body temperature before menstruation or during pregnancy, while the elderly have a lower body temperature. In addition, muscle activity will generate heat, leading to an increase in body temperature. Nervousness and emotional excitement can also raise body temperature. When people are nervous, their body temperature will rise by about 2 at most. In addition to body temperature, people also have "skin temperature", that is, the temperature of the skin surface. When the ambient temperature is 23℃, the temperature of human forehead skin is generally 33-34℃, 30℃ for hands and 27℃ for feet. Even human internal organs have their own temperature: the highest temperature of the liver can reach 38; The brain produces more heat, and the temperature is close to 38. The temperature of kidney, pancreas and duodenum is slightly lower. The optimum living temperature is 35-38; The optimum drinking water temperature is closest to human body temperature. If you drink it while it is hot, the best temperature for brewing honey water is 50; Hot milk and soup taste best at 60 degrees. Under no circumstances should the temperature of drinking and eating exceed 60℃. For cold drinks, soda is the best at 5 o'clock. 39: Optimum temperature of bath water. The bath water temperature should be between 35-40, and 39, which is slightly higher than the body temperature, is the most suitable. Excessive water temperature will destroy the protective layer of the skin and make the skin lose its resistance to pollution and bacteria. It is recommended to try it by hand before washing. If your hands feel hot, other parts of your body will also be hot. 38-43: The best temperature for soaking feet. The foot temperature is the lowest in the human body, so the foot bath water can be a little warmer, which can promote the expansion of blood vessels in the feet and lower limbs, make the brain rest and help sleep. It's best to soak your feet in a deep wooden bucket and cover them with a plastic sheet for better insulation. Even people who are afraid of cold should not blindly "burn their feet" with extremely hot water. Adding ginger, cinnamon and other medicinal materials to foot bath water can promote blood circulation and really keep warm. 32-35: The best temperature for washing your face. The temperature of face wash water should be lower than your body temperature, between 32 and 35 degrees. Tap water can reach this temperature in some parts of the south, but it needs to be heated in the north. Note that it is best to use running water when washing your face. If there is no condition to make the temperature of tap water reach the required temperature, you can also use a basin, but you must wash it with clear water several times, otherwise it will be harmful to your skin health. Below 30: The optimum storage temperature of cosmetics is too high. Cosmetics should not be stored in places where the temperature is too high. Because of the high temperature, it is not only easy to volatilize the moisture in cosmetics, but also easy to dry the cosmetic cream, which is easy to separate the oil and water in the cream and deteriorate. Therefore, in hot summer, don't put too much cosmetics in your handbag, and you can use it in a short time. The optimum storage temperature should be below 30℃. 22-25: The best working temperature for refreshing people. Scientific research shows that at 22 o'clock, work efficiency will be reduced, but above 25 o'clock, people will feel sleepy again. Therefore, it is necessary to properly adjust the air conditioning temperature in the office to avoid being too high or too low. 20: Comfortable sleeping temperature of human body. Whether it is summer or winter, the air conditioner should not be too cold. It is best to soak your feet with hot water before going to bed in winter to increase blood circulation, raise your body temperature and help you sleep. But at the same time, keep the sleeping environment ventilated. Better not
The most suitable temperature in the diet is 60-70. Boiled milk is rich in protein, and great changes will take place in protein after heating. 60-62, colloidal protein particles will dehydrate, change from solution to gel, and then precipitate. When the temperature rises to 100, the lactose in milk begins to coke, which turns the milk brown and gradually decomposes to form lactic acid, producing a small amount of acid, which makes it sour and reduces its nutritional value. So don't cook milk at high temperature for a long time. Generally, 60-70 can be sterilized and delicious. The green tea brewed with water at 70-80℃ has excellent color and flavor, and the vitamin C, caffeine and tannic acid contained in the tea have not been destroyed. Superheated boiled water washed with 50-60 honey not only changes the sweetness of honey and makes it sour, but also denatures enzymes in honey, produces excessive hydroxymethyl aldehyde and destroys nutrients.