| Index | Example of keywords | Number |
|---|
| (1) | 1 |  |
|---|
| 0-9 | 13C-metabolic flux analysis (1), 1,4-Dioxane (1), 3D generation (1), 3D structure (1), 2-chloropropene (1), 1-methyl-2-pyrrolidone (1) , etc | 12 | |
|---|
| A | ammonia (7), antibody (6), adsorption (6), antifouling (3), Air separation (3), Activated Carbon (3) , etc | 140 | |
|---|
| B | biomass (8), Biodiesel (5), Bioimaging (3), Battery (2), Big Data (2), bio-oil (2) , etc | 76 | |
|---|
| C-CH | carbon dioxide (10), CFD (7), Chromatography (6), catalyst (5), CCU (5), Cellulose nanofiber (4) , etc | 161 | |
|---|
| CI-CZ | Crystallization (14), CO2 capture (9), CVD (5), COVID-19 (3), CO2 (3), Colloidal suspensions (3) , etc | 186 | |
|---|
| D | drying (7), dehydrogenation (5), Deep eutectic solvent (4), Drug Delivery System (4), Discrete Element Method (3), Desorption (3) , etc | 131 | |
|---|
| E | extraction (8), Escherichia coli (5), Enzyme (4), esterification (2), Energy system (2), Exergy (2) , etc | 105 | |
|---|
| F | Fouling (6), Filtration (4), Forward Osmosis (4), Fluidized bed (3), Flame Spray Pyrolysis (3), Flow reactor (3) , etc | 97 | |
|---|
| G | gas separation (4), Graphene oxide (3), Gelatin (2), Gas-solid reaction (2), gate adsorption (2), gender equality (1) , etc | 58 | |
|---|
| H | Hydrothermal (5), Hydrogel (5), hydrogen (4), hydrothermal synthesis (3), heat transfer equipment (2), hydrothermal treatment (2) , etc | 132 | |
|---|
| I | Ionic Liquid (8), ionic liquids (4), Ironmaking (2), ion exchange resin (2), interfacial polymerization (2), infectious disease (1) , etc | 76 | |
|---|
| J | JISSO (2), Just suspension speed (1), Japanese cedar (1), Janus particle (1) | 5 | |
|---|
| K | kinetic analysis (3), Kamlet-Taft parameter (1), ketone (1), keeling model (1), Kinetic (1), KPI (1) , etc | 8 | |
|---|
| L | Latent heat storage (6), Life cycle assessment (4), Liquid crystal (3), LOPA (3), Layered Double Hydroxide (2), Lignin (2) , etc | 85 | |
|---|
| M-MH | Machine Learning (19), membrane (13), Membrane reactor (5), Membrane separation (5), methane fermentation (3), methanation (3) , etc | 121 | |
|---|
| MI-MZ | mixing (10), Microfluidic device (8), microcapsule (7), Molecular dynamics (7), Microwave (5), monolith (4) , etc | 137 | |
|---|
| N | Numerical simulation (11), nanoparticle (9), Nanoparticles (8), nucleation (6), nanofiltration (4), Neural network (3) , etc | 114 | |
|---|
| O | Oxygen Storage Material (3), Organic solvent (2), oxygen supply (2), oxygen reduction reaction (2), organosilica (2), oxygen evolution reaction (2) , etc | 53 | |
|---|
| P-PH | phase change material (7), PEFC (3), peptide (3), phase transition (3), phase separation (3), pH responsive polymer (2) , etc | 107 | |
|---|
| PI-PZ | plasma (5), process simulation (5), polymer electrolyte fuel cell (5), polyamide (3), Polymerization (2), polylactic acid (2) , etc | 167 | |
|---|
| Q | quenchbody (2), Quercetin (1), quantum chemistry (1), quality evaluation (1), Quality by design (1), Quantum Dot (1) , etc | 7 | |
|---|
| R | Rheology (7), renewable energy (5), Reverse osmosis (3), reactor (3), redox reaction (2), recovery (2) , etc | 80 | |
|---|
| S-SO | separation (10), self-assembly (5), Solubility (4), SDGs (4), Scale-up (3), Screening (3) , etc | 141 | |
|---|
| SP-SZ | supercritical carbon dioxide (9), Subcritical water (6), surface modification (4), supercritical fluids (4), Surface Treatment (3), Structured catalyst (3) , etc | 121 | |
|---|
| T | Thermal Plasma (4), thermal conductivity (2), Temperature-responsive polymer (2), Transdermal protein delivery (2), Transdermal vaccine delivery (2), Temperature measurement (2) , etc | 102 | |
|---|
| U | ultrasound (7), ultrafine bubble (4), Ultrafine bubbles (2), UV resin (1), UiO-66-NH2 (1), Ultrasonic irradiation (1) , etc | 27 | |
|---|
| V | vaccine (4), viscosity (3), Vapor chamber (2), vapor pressure (2), VOF (2), vanadium redox flow battery (2) , etc | 31 | |
|---|
| W | wastewater treatment (3), Wetting process (2), water treatment (2), Washing (1), Water vapor sorption (1), woman tenure track (1) , etc | 30 | |
|---|
| X | X-ray scattering (2), xylitol (1), X-ray CT imaging (1), XAFS spectroscopy (1) | 5 | |
|---|
| Y | Yarrowia lipolytica (1), yeast surface display (1) | 2 | |
|---|
| Z | Zeolite (13), zeolite membrane (3), ZIF-8 (2), Zero CO2 Emission (1), zeolites (1), Zinc oxide (1) , etc | 23 | |
|---|
| Non alphanum. | *BEA type zeolite membrane (1) | 1 | |
|---|
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easp 2.46; update.pl 2.37 (C)1999-2015 kawase