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Crystals of lactose found in milk

Crystals of lactose found in milk

A600/0760

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Credit

CLAUDE NURIDSANY & MARIE PERENNOU / SCIENCE PHOTO LIBRARY CLAUDE NURIDSANY & MARIE PERENNOU / SCIENCE PHOTO LIBRARY

Caption

Lactose. Polarised light micrograph of crystals of the sugar lactose found in milk. It has the chemical formula: C12. H22. O11. Lactose is a white sugar occurring in solution in the milk of all animals. Human milk contains 6% lactose; cow's milk contains 4%. It is commercially prepared by evaporation of the whey obtained in cheese-making. Like table sugar (sucrose), it is a disaccharide consisting of two basic sugar units: glucose and galactose. Unlike sucrose, however, lactose is tasteless. Magnification: x63 at 35mm size.

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Model release not required. Property release not required.

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