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" One calorie is the energy required to heat 1 cm3 of water from 14.5 to 15.5°C. One Calorie, which is equivalent to 1000 calories or 1.0 kilocalorie, is the standard unit employed nutritionally. To convert

" One calorie is the energy required to heat 1 cm3 of water from 14.5 to 15.5°C. One Calorie, which is equivalent to 1000 calories or 1.0 kilocalorie, is the standard unit employed nutritionally. To convert calories into joules, multiply by the conversion factor of 4.185.

For a complete description of SI units see the IUPAC Manual of Symbols and Terminology for Physicochem-ical Quantities and Units (1970). Pure Appl. Chem. 21, 3-44.

Other units employed in biological systems includi the following:

Unit

Abbreviation

Comment

Mole

mol

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