Source: Qianjiang Evening News
After a long period of silence, the Qianjiang Evening News hourly news column "Cha Fan Shuo" has made a strong comeback.
When the weather is hot, many people are too lazy to cook. Like the recent temperature, the consumption of convenience foods and prepared dishes is rising.
This year, pre-made dishes have become popular, and there are even celebrities selling pre-made dishes on live broadcasts, creating considerable results.
In fact, almost everyone has consumed pre-made dishes , and the 1.0 version is represented by instant noodles.
This year, due to the epidemic and other reasons, an upgraded version of "self-heating rice" has been produced, which is a cooked vegetable bag + rice bag. The rice bag inside is dry and has clear particles. Just add some water and heat it on a self-heating pot. eat.
Have you tried it? What do you think it tastes like?
Recently, a friend of the Hour News reporter who has been engaged in rice breeding research for more than ten years took his children on an outing with a classmate's house. For the first time, he tasted the self-heating rice given by the other parent. "It didn't taste like rice." The child A classmate’s family has bought a lot of it and thinks it tastes good, so he often repurchases it. “
Isn’t the rice in self-heating rice natural rice?
With doubts, the hourly news reporter went to the supermarket and bought seven or eight brands of self-heating rice, and found Zhejiang University nutrition professor Shen Lirong, who is an authoritative expert in the field of food processing and business safety in our province.
Teacher Shen, who is very particular about eating, said: "Self-heating rice belongs to the category of pre-made dishes. There is currently no national standard, only local and corporate standards."
If you want to find out what the rice in self-heating rice is, you need to experiment. analyze.
After being recommended by Teacher Shen, the reporter found two units, Zhejiang Academy of Agricultural Sciences and Zhejiang Guozheng Testing Technology Co., Ltd., and conducted two sets of experiments.
Self-heating rice is magnified ten thousand times,
We see the fragmented starch structure
The natural rice we eat has been refined and processed, and most of the seed coat and germ have been removed. The starch structure of rice is similar to the brick house we live in, which is made up of "bricks".
Natural rice Electron microscope picture
This is the rice starch structure photographed by the reporter at the Public Laboratory of the Zhejiang Academy of Agricultural Sciences with a scanning electron microscope , which is what rice looks like after magnifying 10,000 times.
The rice of self-heating rice, when magnified 10,000 times, looks a bit like a gravel beach by the river, with different sizes. They are made from starch restructuring, and the original starch structure has been destroyed.
Electronic microscope picture of self-heating rice
Teacher Shen said that it is clear from the photos that the starch structures of natural rice and self-heating rice are completely different. Obviously, self-heating rice is not natural rice, but artificial rice.
Under the optical microscope with a magnification of 20 times, we can see that the shape of natural rice is pointed at one end and rounded at the other. The pointed end is the position of the rice germ. If it is unrefined rice, the pointed end is where it germinates.
Natural rice
Artificial rice
The rice in self-heating rice also has a similar appearance to rice, but if you look closely at 50 times magnification, you will find that both ends of this rice are round, and the detailed features of natural rice do not exist.
A staff member of the Hangzhou Grain and Oil Logistics Center Wholesale Market said that the market has been trading grain and oil for many years, and anyone can tell at a glance that the rice in the self-heating rice is not natural rice. "Because they have the same shape at both ends, they are made of starch and other ingredients through machine shaping."
Self-heating rice
Hour News reporter searched online and found that there is a lot of manufacturer information on artificial rice processing equipment on the Internet, The price of a machine usually costs tens of thousands of yuan.
China Rice Research Institute—Yu Yonghong, director of the Quality Inspection Office of the Rice and Rice Products Inspection Center of the Ministry of Agriculture and Rural Affairs, is one of the authoritative experts in the field of rice quality in my country and even internationally.
"Usually, the oil content in the refined and processed natural rice we eat is 0.5%-1%. The oil content of the rice seed coat is higher, and the oil content of brown rice is usually 3%."Teacher Yu went to buy self-heating rice himself. After carefully looking at these products, he believed that it was indeed not natural rice. "Such artificial rice has destroyed the original nutrients of natural rice. "
What are the "mono- and diglyceryl fatty acid esters" on the packaging of self-heating rice?
The packaging instructions of self-heating rice show that the main ingredient in self-heating rice is rice. There are also monoglyceryl and diglycerin fatty acid esters, and some also add other starches. In pastries, bread and other foods, it is used to improve the taste of food. "Professor Shen Lirong of Zhejiang University said that patients with diabetes and dyslipidemia should try to eat as little food as possible containing monoglycerol and diglyceryl fatty acid esters. "Such substances will increase the fatty acid content in the patient's body, so there will be a certain increase. Patients with high blood lipids , the role of blood sugar. "
Some self-heating rice ingredients list also includes cornstarch.
"The purpose of adding starch to artificial rice is to improve the taste. Previously, potato starch was indeed used to process artificial rice. " Shen Lirong said.
Professor Cheng Fangming from Zhejiang University College of Agriculture began to engage in rice scientific research in the 1980s and was the first group of scientists in my country to focus on the field of rice quality improvement. In addition to starch, natural rice also contains various vitamins and a variety of minerals and Trace elements.
"There is a kind of ' parboiled rice ', where the rice is steamed first and then threshed. It is not as white as the rice we eat, but is brown with seed coat. It can be understood as a kind of 'twice-cooked rice'. ', because of secondary cooking, it mainly loses the B vitamins necessary for the human body. Artificial rice that has been repeatedly heated and processed may lose more nutrients. "Cheng Fangming said.
Is artificial rice with added rice, oil, and starch really safe and healthy?
So, will manufacturers use old rice or spoiled rice to process artificial rice? The rice in self-heating rice, food safety How?
The laboratory of Zhejiang Guozheng Testing Technology Co., Ltd. used a control group experiment to test two types of raw rice and two types of supermarket prepackaged cold rice. The rice and two types of self-heating rice and rice bags were tested for total bacterial count, Salmonella , Bacillus cereus , fatty acid esters, moisture and other indicators.
The orange boxes show the test results of the two brands of self-heating rice and rice bags.
The two indicators of total bacterial colonies and salmonella in the experiment are easy for most people to understand. The test data of the 6 samples are also within the normal range
value.
Bacillus cereus This indicator is usually used when detecting overnight rice. For example, if the temperature is high in summer, if the overnight rice becomes rancid, the
fatty acid esters of Bacillus cereus will definitely exceed the standard. This item is used when testing whether the rice is old rice. The two self-heating rice samples we sampled The test data of the rice packets are within the normal range.
Finally, Teacher Shen gave a summary of the experiment: Self-heating rice belongs to the category of pre-made dishes. There are currently no national standards for pre-made dishes, only local and enterprise standards. The self-heating rice for this random inspection was The hygienic status of hot rice is acceptable, but for the sake of everyone’s nutrition and health, I personally recommend eating as little of this type of food as possible.
Source: Qianjiang Evening News·Hourly News reporter. Shi Wen
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