Frozen corn wholesale: frozen corn have harm?
Release date：2014-11-20 00:00 Source： Click：
Recently it is to eat fresh corn season, but a lot of people when eating corn, cornwill put the body as valuable things as a waste to throw away, that is, corn silk. In fact, the corn must be able to discharge heat, diuretic, calming the liver,gallbladder, so the good things you'd better not waste, can collect it every day to dry, soaked in water to drink.
In addition, many viewers will choose to buy some fresh corn in the fridge next year,convenient to eat. But such an audience, this approach may have doubts about......
The audience Mr. Ma: "they directly to the fresh corn frozen in the frozen layer,indeed to winter there to eat, but I like frozen corn I feel a little nutrition, no."
Aiming at this problem, the reporters came to the Peking University School of public health, to find experts here ask what......
The Peking University School of Public Health Department of nutrition and food hygiene, Dr. Zhang Zhaofeng: "the two nutrition of maize, a corn protein, starch istwo, after the freeze will not damage."
In other words, is not to cause any impact frozen corn nutrition, it seems desirable method of frozen fresh corn! But experts say it may not......
The Peking University School of Public Health Department of nutrition and food hygiene, Dr. Zhang Zhaofeng: "although corn nutrition is not lost, but will lead to other important issues."
Nutritive corn frozen since no loss, it will bring what problem? This reporterconducted an experiment......
Reporter: "the one on the left is the frozen two months of corn, and on the right isfrozen for a week, they didn't seem to have what difference, but in the end there is no difference? We do experiments have a look."
A reporter of the frozen two months of corn and frozen for a week of corn, were placed in the pure water, then the number of colony check pure water, have a lookwhich most......
See this certainly many viewers said, the bacteria through low temperature freezingmust be killed, then what Is it right? So? After a day will know.
A day after the two test paper have some spots. But by contrast, can be clearly seen, frozen two months corn on bacteria than the frozen for a week. Why cornafter such a long time to freeze, bacteria too much?
The Peking University School of Public Health Department of nutrition and food hygiene, Dr. Zhang Zhaofeng: "in fact, there are many bacteria, especiallypsychrophilic bacteria, which under the conditions of low temperature, although it isnot under normal temperature condition grow so fast, but in the low temperature,especially at minus twenty degrees Celsius, it also can continue to grow."
Psychrophilic bacteria can survive in low temperature, but also reproduce.However, frozen corn we don't eat directly, also after high temperature cooking, in this process, the bacteria would not be killed?
The Peking University School of Public Health Department of nutrition and food hygiene, Dr. Zhang Zhaofeng: "a lot of people think that the high temperature disinfection can kill bacteria, indeed, but the psychrophilic bacteria secrete a toxin,the toxin even through the high temperature disinfection and will not be damaged."
The psychrophilic bacteria produce toxins that can cause severe intestinal disease,adverse to the body. Moreover, corn will produce a kind of call "toxin" Aspergillus flavus during freezing, also is a hazard to health.
However, since long time frozen corn breeding toxins, the supermarkets sell frozen corn is not can't eat?
The Peking University School of Public Health Department of nutrition and food hygiene, Dr. Zhang Zhaofeng: "the old frozen corn if the time to buy vacuumpackaging intact we can eat, but if some of the damage of the packaging bag, weshould not choose."
The experts tell us, frozen sweet corn is after disinfection and sterilization in the process, the whole process and are sterile, so as long as the packing can safely eat.
Here, certainly has the audience to ask, I in the frozen before the corn cooked, can not kill bacteria? What Is it right? So, next we still through the experiment to verify.
For the convenience of comparison, the reporter took two were frozen for two weeks the students to do experiments with maize and cooked corn, were measured by their total number of bacteria...... The results of how to?
A day later, when the reporter saw the results of the experiment, but be startled at!Two maize bacterial number almost as much, have no what difference, what is this?
The Peking University School of Public Health Department of nutrition and food hygiene, Dr. Zhang Zhaofeng: "here has committed a very serious mistake, here weshould pay attention to a little, cooked food in the refrigerator inside it, the refrigerator is a bacteria breeding sites, there will be a lot of bacteria."
Although in the frozen before we did the treatment of high temperature sterilization,but the fridge was living with a lot of psychrophilic bacteria, so a long time to freeze the infection will also be bacteria, but experts say, the ripe corn stored in the freezer may also have more serious problems......
The Peking University School of Public Health Department of nutrition and food hygiene, Dr. Zhang Zhaofeng: "the food cooked, protein denaturation, food moreeasily degenerate, namely we commonly known as sour."
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