Background: a young people to come to an interview with the press on the question of烤红薯. After reading problem, it is estimated that they are in line to see hazardous烤红薯like Posts, intended to warn young people not to eat this kind of thing. Generally speaking, Say anything harmful to the press is concerned, is always very attractive thing. However, my answer may disappoint them.
1 coal baked way, will make sweet potato produce substances harmful to health?
easily lead to a direct open flame baking harmful substances, mainly starch, after more than 140 degrees when heated to high temperatures generated by acrylamide substances, as well as protein焦糊heterocyclic amines generated, as well as the high temperature generated by fat Benzopyrene category. Fortunately, sweet potato little fat, protein and few, normal baking temperatures are not dangerous. In theory, using oven or infrared oven, set temperature and time are the most烤红薯safety. However, this relatively high cost to do not easy On the way grilled. Many people use charcoal indirect baking, as long as the sweet potato is not direct contact with open flame, is also acceptable.
2 someone put chemical barrels into sweet potato barbecue pits, so that by baking sweet potato such as being fit for human consumption, what harm it?
drum circle烤红薯whether harmful depends on its previous best of what is material, not to generalize. Such as this original release barrels of alcohol, put oil, then there is nothing to fear. If it previously used to put gasoline, although the consumption of gasoline in itself should not, but after several times of heating will be completely volatile. Clean after volatile, it is no longer harmful substances. Know that we want to eat the soybean oil is to use light gasoline as solvent extraction, removal of solvent, the residue in line with national standards, so do not eat according to our error. Unless it is dressed up a non-volatile toxic substances, but also just with air shortly before obvious hazards.
We certainly hope that the processing烤红薯who can clean house, the use of infrared ovens, electric ovens to烤红薯. In fact, now there is this kind of workshop is indeed the emergence of commitment to give people a clean and safe production烤红薯, this will be its direction of development. However, we do not have to put a round drum of baked sweet potato as a poison used a barrel to a big fuss over this.烤红薯cling to their grasp, it is better to fight against what Char-grilled lamb string. Things that really are very unsafe, carcinogenic substances must be exceeded, but also a large amount of carcinogenic smoke. And open-air barbecue has been prohibited by the health sector, but a lot of people would love that one, for them to join.
3 some of whom will use the storage for a longer period of sweet potato, sweet potato grounds that such water has been a part of air-dry, sweet potato will be sweet and delicious. I would like to ask, so baked sweet potato nutritional value out whether there is damage?
such烤红薯sound. Vegetables and sweet potato was not as intolerant things storage, storage over the winter it is very normal thing. Eat sweet potato winter we were young. A lot of tubers, fruits, vegetables, etc. This has the basic characteristics, that is, after winter's cold storage of raw materials of sugar will rise (this is the plant antifreeze improve instinct of a biochemical changes), just before eating国光苹果People keep to favorite during the Chinese New Year is off because冬储sweet apple comparison.
In short, the depositors can be assured that eating half a year of sweet potato, the surface that do not affect on the nutritional value, not moldy on the line. Health after dark moldy sweet potato can produce a toxin that must not to eat. Frostbite after the sweet potato will become soft and perishable, do not eat.
4烤红薯epidermis was often visible part of charred烤糊even whether it will contain harmful substances?
If it is brown黏黏things, basically Do not worry. This is "caramel reaction" result. That is, to eat yam Roberts, Roberts potatoes, ice and other food糖葫芦time and found that sugar has become a bit of yellow hair that chemical changes. (Caramel reaction Maillard reaction not the same as the US-oh. Sugars are high fever it happened under the separate responses to amino-containing material does not require participation. Maillard reaction are necessary amino participation.)
sweet potato sugar inside was concentrated under high temperature, heating to 140 degrees when the reaction happened caramel, with the temperature gradually become darker in color, and finally black carbonation, but non-toxic. This process will produce an attractive sweet flavor, it is very popular烤红薯one of the reasons why. If the epidermis is not browning, aroma inadequate, I am afraid it would not be tempted so many people had.
Of course, in the caramel severe reaction happened at the same time, sweet potato which contains a small amount of protein will焦糊together, the occurrence of Maillard reaction, producing acrylamide. But do not worry too much, because the protein content of sweet potato is very low, unlike when deep-fried potatoes, as have more acrylamide, also unlike animal foods as barbecue when a large amount of heterocyclic amines, eating too much time to remove some black can.
5 sweet potato such foods, the manner in which processing, can be compared well to retain its nutritional value?
sweet potato, fresh steamed and grilled food are good, can also煮粥. Sweet potato starch can be not only a food, it is rich in vitamin C, Red sweet potatoes have a lot of carotene. It is gratifying to note, sweet potato starch will be contained in the protection of one of the vitamins, such as cooking and baking heat losses are small.
烤红薯is actually a reasonable processing method, which is neither the introduction of grease, do not add sugar, are a natural low-fat high-fiber foods can also retain their the original features will help prevent colorectal cancer. Contains one of many potassium, have a considerable amount of vitamin C (equivalent to the level of radish), have good eye-carotene, as well as to enhance immunity mucin and a large number of soft dietary fiber .... .. children were used to replace烤红薯cake cookies cookies to send such, it is too healthy a snack selection!
In short, I am firmly opposed to demonizing烤红薯. Some people Emily, what should be put as toxic and harmful, it is able to attract eyeballs earn money, but will cause people to panic, which could benefit from the many victims of less food. Not only do we need to know what the food which has harmful substances, but also want to know what food to have our benefits. This way can we understand what we are eating, what are we away from the.
I can responsibly say that in this world, do not contain harmful substances and pollution of the food substances are non-existent. Put all their food is treated as a poison, it is better to select one of the body has to help the species, according to a reasonable number and proportion to eat as much as possible get their health benefits, it is equivalent to reducing the impact of harmful substances.
easy home produced - sweet烤红薯:
1 sweet potato washed, microwave high-fire heating 5 -- 6 minutes, so as to keep the internal heat through. And into the oven, 140 degrees bake 20 minutes, then 100 degrees bake 20 minutes off the heat in the oven after cooling to room temperature can be natural.
2 sweet potatoes washed and cut into thick slices put lunch boxes in the microwave oven, microwave high-fire heat 5 minutes; then check Hiranabe bottom put some oil, tiled entry preheater-off sweet potato chip, covered with lid, stew baked low heat 10 minutes, turned face, and then bake 8 minutes. Attention to fire less frequently observed at the end to avoid paste.
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