Analysis 25 Research 20 chemistry 17 analysis 15 Properties 14 Environmental aspects 10 Technological innovations 10 History 9 Methodology 9 Application 8 Utilization 8 adverse effects 8 Control 7 Evaluation 7 Pesticides 7 Synthesis 7 methods 7 Composition 6 Development 6 Water 6 metabolism 6 Bacteria 5 Formation 5 Health aspects 5 Identification 5 Industrial applications 5 Inventions 5 Structure 5 Toxicology 5 chemical synthesis 5