Hydrogen 27 Hydrogen as fuel 19 Dissertations 17 Dissertations, Academic 17 Hydrogenation 14 Hydrogen peroxide 11 Biomass energy 6 Biotechnology 6 Hydrogen-ion concentration 5 Measurement 5 Palm oil industry 5 Research 5 Catalysis 4 Catalysts 4 Electrolysis 4 Environmental aspects 4 Purification 4 Water 4 Analysis 3 Biological treatment 3 Chemical process control 3 Fuel cells 3 Methane 3 Nanostructured materials 3 Renewable energy sources 3 Storage 3 Synthesis 3 Therapeutic use 3 Waste disposal 3 Biosensors 2