Milk, which is one of the chief sources of calcium, is highly nutritious and constitutes a part of our daily diet in some form or the other. The main constituents of milk are water, proteins, lipids, carbohydrates, vitamins and minerals, which are essential for growth and development.
Milk also contains various biologically active compounds such as caseins and whey proteins. Of the total whey solids, it is estimated that about 75% is lactose. Milk is available as full cream, skim, lactose-free and fat free milk. Condensed and evaporated milk, which can be pasteurized

Toshiba’s chief executive and president Hisao Tanaka has resigned after the company said it had overstated its profits for the past six years.
He will be succeeded by chairman Masashi Muromachi, with vice-chairman Norio Sasaki also stepping down.
On Monday, an independent panel appointed by Toshiba said the firm had overstated its operating profit by a total of 151.8bn yen ($1.22bn, £780m).
The overstatement was roughly triple an initial estimate by Toshiba.
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Toshiba has been facing comp...
A Bangladeshi physicist of Princeton University led an international team to the discovery of an elusive massless particle theorised 85 years ago.
The particle could give rise to faster and more efficient electronics because of its unusual ability to behave as matter and antimatter inside a crystal, quoting a new research a report was published on the university website.
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M Zahid Hasan (pictured) and his research group researched and sim...