Analysis Alkaloids 44 Medicinal plants 43 Therapeutic use 37 Synthesis 30 Water 26 Heavy metals 25 Environmental aspects 24 Dissertations 23 Cancer 22 Dissertations, Academic 22 Composition 21 Trace elements 21 Absorption and adsorption 20 Research 20 Annonaceae 19 Palm oil 19 Phytochemicals 19 Plants 19 Copper 17 Botanical chemistry 16 Food 15 Measurement 15 DNA 14 High performance liquid chromatography 14 Lauraceae 14 Materials 14 Oil palm 14 Pollution 14 Surface active agents 14