| First letter | Keywords | Number |
|---|
| 0-9 | 25th anniversary (2), 2D Ising model (1), 13C-Metabolic flux analysis (1), 2,5-furandicarboxylic acid (1), 5-(hydroxymethyl)furfural (1), 3DIC (1) etc. | 9 |  |
|---|
| A | adsorption (14), Antibody (4), activated carbon (4), Absorption (4), Ammonia (4), Atomic Layer Deposition (4) etc. | 195 | |
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| B | biomass (6), Bubble dynamics (4), biomanufacturing (3), bioprocess (2), Bubble rise motion (2), Bio-oil upgrading (2) etc. | 108 | |
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| C-CH | CFD (8), Carbon neutral (7), carbon nanotube (6), catalyst (6), CCU (6), carbon dioxide (5) etc. | 171 | |
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| CI-CZ | crystallization (10), CO2 (10), CO2 capture (5), CO2 separation (5), CO2 electroreduction (3), CO2 reduction (3) etc. | 181 | |
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| D | Deep eutectic solvent (9), Drying (4), Dispersion (3), Direct Air Capture (3), Degradation (3), Discrete Element Method (3) etc. | 145 | |
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| E | electrocatalyst (9), Extraction (8), electrocatalysts (4), Emulsion (4), enzyme (3), Electrodynamic Balance (2) etc. | 117 | |
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| F | fluidized bed (7), Fuel cell (7), Flame spray pyrolysis (4), Fouling (3), freeze drying (3), Fine bubbles (2) etc. | 98 | |
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| G | gas separation (4), gold (3), gas diffusion layer (3), graft polymerization (3), green ammonia (3), gas hydrate (2) etc. | 68 | |
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| H | hydrogen (9), hydrogel (8), Hydrothermal (6), Hydrogen peroxide (5), Hydrothermal treatment (4), Hydrothermal synthesis (3) etc. | 138 | |
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| I | ionic liquid (7), Interfacial polymerization (5), Image analysis (3), Inhibitor (2), Ionomer (2), Induction Heating Mixing Impeller (2) etc. | 76 | |
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| J | Japanese Company (1), juvenile hormone (1), Jump test (1), Janus multifunctional nanofiber (1) | 4 | |
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| K | kinetic analysis (2), Korteweg force (1), KMC (1), Kinetic TSA separation (1), Keratin (1), Kinetic Modeling (1) etc. | 12 | |
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| L | Lithium-ion battery (5), Liposome (4), Life Cycle Assessment (3), Lignin (3), Liquid-liquid equilibria (3), LDES (3) etc. | 93 | |
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| M-MH | Machine learning (26), membrane (15), Metal-organic frameworks (7), Methanation (6), Membrane separation (6), Mechanistic model (4) etc. | 161 | |
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| MI-MZ | Mixing (10), molecular dynamics (9), Microwave (5), MOF (3), Molecularly Imprinted Polymer (3), monolith (3) etc. | 127 | |
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| N | Nanoparticles (7), numerical simulation (5), Nucleation (5), Nanoparticle (5), Nanofiltration (3), Nanofiber (2) etc. | 80 | |
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| O | Organic solvent nanofiltration (4), osmotic pressure (3), Oxygen Reduction Reaction (3), Optimization (3), Oxygen-enriched air (2), Olefin (1) etc. | 54 | |
|---|
| P-PH | PFAS (6), PEFC (6), Peptide (5), permeability (3), Pervaporation (3), perfusion culture (2) etc. | 97 | |
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| PI-PZ | Polymer (6), polymer electrolyte fuel cell (6), polyelectrolyte complex (4), Plasma (4), Porous material (3), Proton conductor (3) etc. | 173 | |
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| Q | questionnaire survey (1), quasi-solid (1), Quartz Crystal Microbalance (1), Quantitative Evaluation (1), quantum computer (1), QCM (1) etc. | 7 | |
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| R | Rheology (4), Reactive crystallization (3), Residence time distribution (3), Risk assessment (3), Recycling (3), redox (3) etc. | 81 | |
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| S-SO | Separation (8), Solvent extraction (7), silica (5), Solubility (5), simulation (4), slurry (3) etc. | 144 | |
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| SP-SZ | Supercritical carbon dioxide (7), Startup (7), Supercritical CO2 (5), surface modification (4), Supercritical water (4), Surface treatment (3) etc. | 101 | |
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| T | Thermal energy storage (4), transdermal delivery (4), Transdermal drug delivery (4), thermal plasma (2), temperature (2), titanium dioxide (2) etc. | 79 | |
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| U | ultrasound (3), Upcycling (2), ultrasonic irradiation (1), ULSI (1), university laboratories (1), Urea Oxidation Reaction (UOR) (1) etc. | 22 | |
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| V | vaccine (5), viscosity (4), vibration (1), Vapor-liquid equilibria (1), Variational Autoencoder (1), Visible light irradiation (1) etc. | 30 | |
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| W | wettability (2), Water electrolysis (2), Water Treatment (2), Women's Empowerment (2), Wound healing (2), Wastewater treatment (2) etc. | 36 | |
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| X | xylose (2), xylitol (1), XANES/ELNES (1), X-ray CT imaging (1) | 5 | |
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| Y | Yttrium doping (1), Yoshino cypress (1) | 2 | |
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| Z | Zeolite (11), ZrO2 (1), Zinc-ion battery (1), ZSM-5 (1), Zeta Potential (1), Zwitterionic nanofiltration membrane (1) etc. | 29 | |
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| 非英数字 | * (5), precision medicine (1) | 6 | |
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