Heat yoghurt drink? Acid taste a lot of

High temperature is likely to result in secondary fermentation yogurt

The 2016-03-17

Source: Beijing evening news

The original title: heat yoghurt drink? Acid taste a lot of

Recently, there are readers found in large some small shop front, some vendors Shouting "old yogurt" hot to drink. "Yogurt is not through the cold storage to store? After heating will drink?" For this reader Mr Zhang to call the hotline telephone counseling for living laboratory program.

Witnesses in the rice cooker heat yoghurt

Reporter found in large, from the lotus market via sycee bridge to DE bridge line, three small store by the road, all in the trademark of "old Beijing hot yogurt", some stores also is at the door with a basin of hot water or electric rice cooker, "after" a few porcelain yogurt with hot water inside.

"All sold, what's wrong?" The distance from the north sea along a shop owner said. He seemed less than 30 years old, with central China accent, "I was a part-time job, come here to work. Don't say the white porcelain is old Beijing yogurt yogurt." His answer to dodge the "hot" word.

And another north of houhai shopkeepers, elder sister, is a Beijing "since last winter flaunt one's old age Beijing hot yogurt, I was the first company the name." To this approach, the elder sister is a "proud", white porcelain yogurt is placed in water bath heating in the rice cooker. "Because of the cold weather, some tourists ask, can put yogurt is hot, so I came up with the idea. Very popular."

A young man came and bought a bottle of yogurt, heat tube plug in drink. "Oh, what a guy, how so acid." Elder sister walked over to explain, this is because the heat some yogurt, it feels more acid. "Rest assured to drink, certainly not bad, are the two goods in the sky." On the label, reporter saw that white porcelain yoghurt from a factory in suburban Beijing, date of production for the recent two or three days. The hot water in the rice cooker, not hot to the touch, yogurt drink is cold feeling in the mouth.

"Which have so many old Beijing products. Yogurt? Hey, that can't even drink milk, what makes yogurt can be classified as a specialty of old Beijing?" Large, chat a few old man chat with reporters on the hot yogurt, a face of despise. "More heard of overheating of the yogurt drink, that's not right away. Now lakes near the shop, are tourists, people do not understand, take those things bogus house of old Beijing. Old Beijing ah, let they claim."

Exploration of yogurt drink hot or not?

It is understood that yogurt production process was added after strains fermented milk, in use of yogurt strains on the market is a lot of streptococcus thermophilus and lactobacillus Bulgaria. And between 40 ℃ and 42 ℃, temperature is the best reproduction of these two kinds of bacteria.

Vaccination is milk yogurt immediately after sterilization and cooling to 45 ℃ or so. With streptococcus thermophilus and lactobacillus Bulgaria culture blends, maintain between 41 ℃ to 42 ℃ temperature, incubation time was 2.5 to 4 hours, end reach solidification state fermentation. Good solidification yoghurt fermentation, need to immediately move into 0 ℃ to 4 ℃ refrigerator. Under the condition of such temperature, can inhibit bacteria reproduction rate.

More than forty degrees Celsius temperature, therefore, will not kill the beneficial bacteria, the most reasonable heating mode, is, with around 50 ℃ warm water heating slowly. But it is worth noting that more than 50 ℃, is likely to kill bacteria, affect the quality of the yogurt. , therefore, cannot use hot water heating, and more desirable in the microwave heating method, because of microwave destroys the yogurt nutrition, also affect the taste.

Suggestions after heating of yogurt to eat as soon as possible

Although heat yoghurt drink unscathed to the body, but yogurt after heating, need immediate consumption, because is an active lactic acid bacteria at high temperature, long placed, is likely to lead to the secondary fermentation yogurt, adding acid, even the metamorphism.

However, not all drinking yogurt is fit for heating, such as frozen yogurt, when heated, may cause a layer of liquid on the surface. This is the whey precipitation happened in yogurt, affect the quality of yogurt. This kind of yoghurt, best not to drink. (reporter suk Li huanyu Wang Qipeng)