Yogurt machine principle 5Can I use a thermos flask?
With a pot, if you can measure the temperature over a period of time, when the temperature is low, add hot water is also possible, that is, it will be very troublesome. And even so, you can only guarantee fluctuation at 42 degrees, and the effect of fermentation is not as good as yogurt machine.
Yogurt is made by lactic acid bacteria growing in milk. As for the yogurt machine, the principle is to provide the optimum temperature (42 degrees) for the growth of lactic acid bacteria, so a component is heated and a component is controlled by temperature, that's all.
Yogurt machine is to use the heating tube to maintain low temperature constant temperature, lactic acid bacteria have been at normal temperature of normal fermentation, the principle is very simple. It is worth noting that lactic acid bacteria are anaerobic bacteria, the process of attention to isolation of air, usually at 42 degrees under 8-10 hours can be completed.
It should be noted that the 42 degree is the optimum growth temperature for lactic acid bacteria, which grows fastest at this temperature. Of course, other temperature conditions are also possible to grow, so even yogurt in the 4 degrees refrigerator will be bad for a long time, that is because 4 degrees under the conditions, for a long time, lactic acid bacteria will also grow too much.
