Medical Definition of KILOGRAM. 1. : the base unit of mass in the International System of Units that is equal to the mass of a prototype agreed upon by international convention and that is nearly equal to the mass of 1000 cubic centimeters of water at the temperature of its maximum density.2.. : the base unit of mass in the International System of Units that is equal to the mass of a prototype agreed upon by international convention and that is nearly equal to the mass of 1000 cubic centimeters of water at the temperature of its maximum density. 2.
Discard the water layer, which contains the aspirin or acetominophen) and evaporate the chloroform layer to dryness under gentle heat. The result is codeine base, a white crystalline powder. Combine 20 mL pyridine and 25 mL conc. HCl in a beaker and heat strongly to 190C to drive off any water.
1 Nitrogenous bases can form hydrogen bonds. 2  Adenine, Thymine, and Uracil can form TWO hydrogen bonds. 3  Guanine and Cytosine can form THREE hydrogen bonds. 4  In nucleic acids (DNA and RNA), nitrogenous bases can bind to each other by hydrogen bonding. In DNA, Adenine binds to Thymine. 2  In RNA, Adenine binds to Uracil. 3  These hydrogen-bond interactions between nucleotides C-G and A-T or A-U are referred to as base-pairing or complementary base-pairing. 4  Base-pairing holds the double-stranded DNA molecule together.