Metals 69 Dissertations, Academic (Ph.D) 55 Chemistry 41 Heavy metals 34 Nanostructured materials 28 Transition metals 26 Engineering 25 Thesis (Ph.D)-Chemistry 24 Rare earth metals 23 Thesis (Ph.D)-Physics 21 Catalysis 16 Organometallic compounds 16 Organic compounds 14 Organometallic chemistry 14 Analysis 13 Metallurgy 13 Transition metal compounds 13 Bioremediation 12 Nanotechnology 12 Biochemistry 11 Electric properties 11 Metal complexes 11 Semiconductors 11 Soil Science and Agricultural Chemistry 11 Toxicology 11 Chemistry, Organic 10 Crystal growth 10 Metal catalysts 10 Nanostructures 10 Polymers 10