isoabsorption point [obsolete] , 776 isobar in atmospheric chemistry, 776 isobaric mass-change determination, 776 isobaric separation, 777 isobars, 777 isoclined structures in polymers , 777 isoclinic point, 777 isoconfertic separation [obsolete] , 777 isoconjugate systems, 777 isocoumarins, 778 isocratic analysis in chromatography , 778 isocyanates, 778 isocyanides, 778 isocyclic compounds, 779 isodesmic reaction, 779 isodiazenes, 779 isoelectric, 780 isoelectric point in electrophoresis , 780 isoelectronic, 780 isoemissive point, 780 isoentropic, 780 isoenzyme, 781 isoequilibrium relationship, 781 isogyric reaction, 781 isoionic, 781 isoionic point in electrophoresis , 782isokinetic line in atmospheric chemistry , 782 isokinetic relationship, 782 isokinetic sampling in atmospheric chemistry , 782 isolampsic point, 783 isolated double bonds, 783 isolobal, 783 isomer, 784 isomer shift in Mössbauer spectroscopy , 784 isomerases, 784 isomeric, 784 isomeric state in nuclear chemistry , 784 isomeric transition in nuclear chemistry , 785 isomerism, 785 isomerization, 785 isometric, 785 isomorphic polymer blend, 785 isomorphous structures in polymers , 786 isonitriles [obsolete] , 787 isonitroso compounds [obsolete] , 787 isooptoacoustic point, 787 isopeptide bond, 787 isopotential point, 787 isoprenes, 788 isoprenoids, 788 isopycnic, 788 isopycnic separation, 788 isorefractive, 788 isosbestic point, 789 isoselective relationship, 789 isoselenocyanates, 789 isostatic pressing, 790 isosteric enthalpy of adsorption, 790 isostilbic point, 790 isostructural reaction, 790 isotactic macromolecule, 791 isotactic polymer, 791 isotactic triads in polymers , 791 isotherm in atmospheric chemistry, 791 isothermal chromatography, 792 isothiocyanates, 792 isotones, 792 isotope dilution, 792 isotope dilution analysis, 792 isotope effect, 792 isotope exchange, 793 isotope exchange analysis, 793 isotope pattern in mass spectrometry , 793 isotopes, 794 isotopic abundance, 794isotopic carrier, 794 isotopic enrichment, 794 isotopic enrichment factor, 794 isotopic fractionation factor, 795 isotopic ion, 795 isotopic labelling, 795 isotopic molecular ion, 796 isotopic scrambling, 796 isotopic separation, 796 isotopic tracer, 796 isotopically deficient, 797 isotopically enriched ions, 797 isotopically labelled, 797 isotopically modified, 797 isotopically substituted, 798 isotopically unmodified, 798 isotopologue, 798 isotopomer, 798 isotropic, 798 isotropic carbon, 799 isotropic pitch-based carbon fibres, 799 isoureas, 799 isozyme, 799 j-value in atmospheric chemistry, 800