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Amino acids
Nitrogenous bases for DNA and RNA (adenine, guanine, cytosine, thymine and uracil).
Carbohydrates (saccharides): aldoses and ketoses.
Genetic code, ...

Astronomical constants
Phases of the Moon
Eclipses, Equinoxes, Solstices, Perihelion, Aphelion...
Scientific constants
S.I. units, definitions and conversion factors,..

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Acid-base equilibria for Windows ®
pH, concentrations, equilibrium constants...

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Maths + Physics
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Maths + Chemistry
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