Plasma (Ionized gases) 64 Dissertations, Academic (Ph.D) 35 History 34 Gases 26 Chemistry 23 Thesis (Ph.D)-Chemistry 22 Greenhouse gases 20 Literature 19 Thermodynamics 18 Solid-phase synthesis 17 Physics 16 India 15 Kinetic theory of gases 14 Ionized gases 13 Phase transformations (Statistical physics) 13 Synthesis 13 Peptides 12 Biophysics 11 Climatic changes 11 Mathematics 11 Novel 11 Biography 10 English fiction 10 Production and operations management--Product management 10 Thesis (Ph.D)-Physics 10 Criticism 9 History and criticism 9 Phase rule and equilibrium 9 Plasma physics; Properties of matter 9 Polymers 9