albedo, 53 albumin, 53 alcogel, 53 alcoholates, 53 alcohols, 53 aldaric acids, 54 aldazines, 54 aldehydes, 54 aldimines, 54 alditols, 54 aldoketoses, 55 aldonic acids, 55 aldoses, 55 aldoximes, 56 alert levels in atmospheric chemistry , 56 alicyclic compounds, 57 aliphatic compounds, 57 aliquot in analytical chemistry , 57 alkaloids, 57 alkalosis, 58 alkanes, 58 alkanium ions, 58 alkene photocycloaddition, 58 alkene photodimerization, 58 alkene photoisomerization , 59 alkene photorearrangement, 59 alkenes, 59 alkoxides, 59 alkoxyamines, 60 alkyl groups, 60 alkyl radicals, 60 alkylenes, 60 alkylidene groups, 60 alkylideneaminoxyl radicals, 61 alkylideneaminyl radicals, 61 alkylidenes, 61alkylidynes, 61 alkynes, 61 allele, 62 allenes, 62 allo- in amino-acid nomenclature , 62 allometric, 62 allosteric enzymes, 62 allostery, 63 allotropes, 63 allotropic transition, 63 allylic groups, 63 allylic intermediates, 63 allylic substitution reaction, 64 alternancy symmetry, 64 alternant, 64 alternating copolymer, 65 alternating copolymerization, 65 alternating current, 65 alternating voltage, 66 altocumulus cloud in atmospheric chemistry , 66 altostratus cloud in atmospheric chemistry , 66