ABSTRACT
A Abbreviations for 1. absorbance, 2. adenine or adenosine, 3. alanine, 4. ampere. Symbols for 1. Helmholtz free energy and 2. mass number (in chemistry). Å An angstrom unit. Å = 10-1 nm (nanometer) = 10-4 µ (micron) = 10-7 mm (millimeter) = 10-8 cm (centimeter) = 10-10 m (meter). A-Common symbol for anions.
