White sugar, brown sugar and rock sugar that people often eat are actually sucrose. The method of making sugar is not complicated. Juice sugarcane or beet, filter out impurities, then add a proper amount of lime water to the filtrate to neutralize the acid contained in it (because sucrose is easily hydrolyzed into glucose and fructose under acidic conditions), then filter, remove the precipitate, introduce carbon dioxide into the filtrate to precipitate lime water into calcium carbonate, and then filter. The obtained filtrate is an aqueous solution of sucrose. When sucrose water is evaporated, concentrated and cooled under reduced pressure in vacuum, reddish-brown slightly sticky crystals are separated out, which is brown sugar. To make white sugar, it is necessary to dissolve brown sugar in water, add appropriate amount of bone charcoal or activated carbon, adsorb colored substances in brown sugar water, filter, heat, concentrate and cool the filtrate, and a white crystal-white sugar appears. White sugar is much purer than brown sugar. Then, the sugar is heated to a proper temperature, and the water is removed to obtain colorless and transparent block crystal rock candy. It can be seen that rock sugar has the highest purity, the sweetest taste and of course the most expensive price.
White sugar and soft sugar are both called white sugar, and the sucrose content is generally above 95%. White sugar is uniform and neat, hard, loose and dry, without impurities. It is the purest variety with the most sucrose in sugar, and it is also an easy-to-preserve sugar. Compared with sugar, soft white sugar has fine crystal particles, high water content, soft appearance and melt in the mouth. It is suitable to be directly sprinkled on food and snacks and dipped in it. It is difficult to preserve because of its high water content, and it is best to process it into small packages. Rock candy is made of white sugar by dissolving in water, removing impurities, clearing juice, evaporating, concentrating, cooling and crystallizing.
Rock sugar is mild, has the effect of relieving cough and resolving phlegm, and is widely used in high-grade tonics and health products produced by food and pharmaceutical industries. Old people can also quench their thirst by containing rock sugar.
sugar
Young sugar (fine sugar or granulated sugar)
White granular crystal, high purity, sucrose content above 99%, is a kind of sugar with excellent quality, low moisture, impurities and invert sugar content, and easy to store.
Powdered sugar (powdered sugar)
It's white powder, and the sugar particles are very fine. At the same time, there is about 3- 10% starch filler (generally corn starch) to prevent sugar particles from getting wet and tangled.
Sugar powder can also be directly screened with a screen and directly screened on the finished product of West Point for surface decoration.
brown sugar
Crystal is delicate and soft, with different shades, such as red, yellow, purple and black; High molasses, impurities and moisture; However, because it is rich in inorganic salts and vitamins, it has the effect of enriching blood and breaking blood stasis, and is especially suitable for pregnant women, children and anemia. Most of the brown sugar is produced by local methods.
crystal sugar
The large sucrose crystals made by special crystallization method are translucent, with low sugar content and water content, good quality, easy storage, sweet taste of rock sugar and flat sex. They have the effects of invigorating the middle energizer, benefiting qi and moistening the stomach. They are used to treat dry cough, sore throat, dry mouth, stomach weakness, loss of appetite, hypertension and so on.
Put sugar in the dish and heat it before eating.
Seven things to open the door: "rice, oil, salt, sauce and vinegar tea". In fact, sugar is also an indispensable condiment in people's daily life, which will be used in cooking, cooking porridge, making snacks and snacks. There are many kinds of sugar, but many people don't know the difference between them. Some people say that "women can't live without brown sugar for a hundred days", and some people think that rock sugar is nutritious and sweetest. Are these statements scientific?
Different colors have different accuracy.
Sugar can be divided into white sugar, brown sugar and yellow sugar by color. The different shades of color are due to the different degree of impurity removal in sugar making. White sugar is refined sugar, and its purity is generally above 99%. Yellow sugar contains a small amount of minerals and organic matter, so it has color; Brown sugar is unrefined coarse sugar with a deep color.
Sugar can be divided into white sugar, soft sugar, cube sugar and rock sugar according to the particle size. White sugar and soft sugar are both called white sugar, and the sucrose content is generally above 95%. White sugar is uniform and neat, hard, loose and dry, without impurities. It is the purest variety with the most sucrose in sugar, and it is also an easy-to-preserve sugar. Compared with sugar, soft white sugar has fine crystal particles, high water content, soft appearance and melt in the mouth. It is suitable to be directly sprinkled on food and snacks and dipped in it. It is difficult to preserve because of its high water content, and it is best to process it into small packages. Rock candy is made of white sugar by dissolving in water, removing impurities, clearing juice, evaporating, concentrating, cooling and crystallizing.
Scrambled eggs with sugar are tender and smooth.
If we compare the sweetness and taste of various sugars, the result will surprise many people: high-purity white sugar is not as sweet as brown sugar. However, the sweetness of white sugar is relatively pure. Generally speaking, white sugar and yellow sugar are suitable for seasoning in coffee or black tea, and yellow sugar is often used for seasoning dishes. Brown sugar has a special molasses flavor, which is suitable for cooking red bean soup, making bean paste and steaming sweet rice cakes. Rock candy tastes sweet, and it is mostly used for cooking stewed vegetables and soups, such as rock candy tremella, rock candy elbow, rock candy rabbit pieces, etc. Rock sugar can not only make dishes have special flavor, but also increase the luster of dishes. Rock sugar is mild, has the effect of relieving cough and resolving phlegm, and is widely used in high-grade tonics and health products produced by food and pharmaceutical industries. Old people can also quench their thirst by containing rock sugar.
Making cakes with sugar can not only sweeten the taste, but also make the cakes fluffy and soft. Cake is the best example. Scrambled eggs with some sugar can also make them more tender and smooth. In addition, sugar, like salt, can also extend the shelf life of foods, such as preserves and jams.
There is no need to replenish blood with brown sugar.
The refining degree of brown sugar is not high, and more vitamins and minerals are retained. Every 100g of brown sugar contains 90 mg of calcium and 4 mg of iron, which is about three times that of white sugar and yellow sugar, and also contains a small amount of riboflavin (vitamin b2) and carotene. Compendium of Materia Medica records that brown sugar is warm and has the effects of removing blood stasis, promoting fluid production, dispelling cold, promoting blood circulation, warming stomach, strengthening spleen and relieving pain. In China, pregnant women eat brown sugar, and women drink brown sugar water to replenish blood during menstruation. In addition, when catching a cold or getting wet by rain, drinking a bowl of ginger and brown sugar water can prevent colds. This may be related to the rich minerals in brown sugar, especially iron. Iron in China's traditional diet comes from plant food, which is poorly absorbed and utilized. The incidence of anemia among women, especially pregnant women, is high. Iron in brown sugar is undoubtedly a good supplement, which is especially important in the era when animal food is not rich. Nowadays, animal foods with high iron content in the diet are abundant, so drinking brown sugar water is not so important.
People usually eat white sugar, but in the process of transportation and storage, white sugar is easily contaminated by pathogenic microorganisms, especially mites. If mites enter the digestive tract and parasitize, it will cause abdominal pain, diarrhea and other symptoms to varying degrees, which is called "intestinal acariasis" in medicine. If mites are immersed in the urinary system, they may also cause symptoms such as frequent urination, urgency and dysuria. Sugar used directly in cold dishes and sugar used by babies or the elderly need special attention. It is suggested that it is best to heat with food with sugar. When heated to 70 degrees Celsius, mites can die in just 3 minutes. Families should not buy too much sugar, especially in summer when the temperature is high and it won't last long. The purchased sugar should be stored in a dry place and sealed.
Diabetes has nothing to do with eating sugar.
Sugar has a simple molecular structure and can be directly absorbed without digestive enzymes. If you eat too much sugar, it will inevitably affect the human body's intake of other nutrients, thus affecting the absorption of protein, fat, vitamins and minerals. In particular, children should not eat too many sweets and drink too many sugary drinks, otherwise it will affect their appetite during normal eating and affect their normal growth and development.
However, the results of many epidemiological studies show that sugar intake is not directly related to the occurrence of obesity and the increase of blood lipids, but fat intake is closely related to it. The onset of diabetes is due to the dysfunction or damage of islet function, which has nothing to do with eating sugar. However, diabetic patients should not eat sugar at will, because the sugar that is easily absorbed will cause the blood sugar to rise rapidly, making the damaged islet more unbearable and aggravating the condition.
Sugar remaining in the mouth will corrode teeth and cause dental caries after being decomposed into acid by bacteria in the mouth, so pay attention to cleaning the mouth after eating sugar or sugary food.