Extraction 19 extraction method 16 Feature extraction 6 Feature extraction methods 6 Biomass 5 Extraction method 5 hydrolysis 5 Ethanol 4 Organic solvents 4 biofuel 4 lipid 4 Algae 3 Cellulose 3 Enzymatic hydrolysis 3 Fatty acids 3 Forecasting 3 Lipids 3 Plants (botany) 3 catalysis 3 cellulose 3 Acid catalysis 2 Animals 2 Atlantic Ocean 2 Carbon dioxide 2 Climate change 2 Crops 2 Deep learning 2 Eukaryota 2 Extraction time 2 Farm Crops 2