I am a volunteer at Helen Woodward's Animeals program and have been for 2 years. Prior to this, I volunteered at Club Pet. I have found my niche at Animeals. I love the program and, with the exception of 1 paid employee, the program is 100% supported by volunteer time.
Aziridines are organic compounds containing the aziridine functional group, a three-membered heterocycle with one amine group (-NH-) and two methylene bridges (-CH. 2-). The parent compound is aziridine (or ethylene imine), with molecular formula C.
Purines versus Pyrimidines comparison chart; Purines Pyrimidines; Introduction (from Wikipedia) A purine is a heterocyclic aromatic organic compound, consisting of a pyrimidine ring fused to an imidazole ring. Pyrimidine is a heterocyclic aromatic organic compound similar to benzene and pyridine, containing two nitrogen atoms at positions 1 and 3 of the six-member ring. It is isomeric with two other forms of diazine.