Pure lactic acid is a colorless liquid, is a colorless to pale yellow liquid. Odorless, hygroscopic. The relative density of 1.2060 (25/4 ℃). Melting point 18 ℃. Boiling point 122 ℃ (2kPa). Refractive index nD (20 ℃) ??1.4392. With water, ethanol, glycerin, insoluble in chloroform, carbon disulfide and petroleum ether. Heating under normal pressure, concentrated to 50%, part of the anhydride into milk, thus products often contain 10% -15% of the milk anhydride.
2013年8月9日星期五
Summer drink milk calcium
1, not with rice and porridge
The milk mixed with rice soup or porridge, milk contains vitamin A, and rice soup and porridge mainly starch-based, they contain Calcium lactate, will destroy vitamin A nutrients.
2, do not mix with chocolate
Eating chocolate while drinking milk, chocolate ingredients will destroy the calcium in milk, chocolate milk, but also to lose the role of antioxidants.
3, without sugar
When boiling milk sugar, milk under buffered lactic acid with fructose reaction toxic fructosyl lysine.
4, do not mix fruit juice
Juices, mixed fruit drink milk, juice and fruit acidity and binding will occur casein coagulation precipitation, difficult digestion and absorption.
5, spinach and milk do not take
Drink milk after eating spinach, milk is rich in protein and calcium, spinach contains oxalic acid, both of which will combine with water to form insoluble calcium oxalate, which greatly affect the absorption of calcium.
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