SEARCH Articles Figures Tables Catalyst, general isotopic molecules Contrast shown by a binary system of homogeneous isotopic molecules Frequencies of Isotopic Molecules Hydrogen molecules, isotopically substituted Isotopic Composition of Water Molecules Isotopic Patterns of Large Molecules Isotopic Patterns of Molecules Isotopic molecules Isotopic molecules Isotopically labeled molecules Isotopically substituted molecules Large Molecules - Isotopic Patterns at Sufficient Resolution Molecules isotopic patterns Molecules isotopic substitution Nitrogen Relaxation in Large Molecules The Isotopic Substitution Method Use of Isotopically Labeled Molecules Vibrational Frequencies of Isotopic Molecules