| First letter | Keywords | Number |
|---|
| 0-9 | 3D bioprinting (2), 3D printing (2), 2,2'-bipyridine (1), 3D cell culture (1), 3D printability (1), 3DIC (1) etc. | 11 |  |
|---|
| A | Adsorption (10), active matter (4), absorption (3), Amine (3), air separation (3), Ammonia Cracking (3) etc. | 164 | |
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| B | Biomass (6), Biodegradable polymer (2), Bioethanol (2), Bubble rise motion (2), Biopharmaceuticals (2), biomass conversion (1) etc. | 92 | |
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| C-CH | Catalyst (11), carbon dioxide (8), CFD (8), carbon nanotube (4), Carbon capture (3), Cellulose (3) etc. | 157 | |
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| CI-CZ | Crystallization (11), CO2 capture (11), CO2 electrolysis (6), CO2 Absorption (3), CO2 (3), coating (3) etc. | 186 | |
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| D | Deep eutectic solvent (12), direct air capture (8), Drying (6), Drop-in fuel (5), Degradation (4), drug delivery system (3) etc. | 151 | |
|---|
| E | Emulsion (8), Extraction (7), Electrolysis (4), Electrocatalyst (4), electrodialysis (4), electrochemical CO2 reduction (3) etc. | 134 | |
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| F | Flame spray pyrolysis (4), Fluidized bed (4), Fine Bubble (4), fuel cell (4), freezing (3), Fischer-Tropsch Synthesis (3) etc. | 122 | |
|---|
| G | Gasification (4), Gold nanoparticles (4), Gold (4), Gel (3), Gas separation (3), Gas sensor (3) etc. | 84 | |
|---|
| H | Hydrogen production (16), Hydrogen (8), hydrogel (7), Hydrogen evolution reaction (3), Hydrolysis (3), Hydrogenation (3) etc. | 143 | |
|---|
| I | Interfacial polymerization (10), Ionic Liquid (6), Interface (4), Image Analysis (2), Independent Protection Layer (2), In-situ observation (2) etc. | 96 | |
|---|
| J | Janus particle (2), jam (1), Japanese Traditional Company (1) | 4 | |
|---|
| K | kinetics (2), Kinetic Analysis (1), kinetic model (1), K promotion (1), Komagataella phaffii (1), Kinetic analysis of hydrodefluorination (1) etc. | 7 | |
|---|
| L | lithium-ion battery (4), liposome (4), LLM (3), liquid crystal (3), Liquid-Liquid Phase Separation (3), lipid assembly (3) etc. | 98 | |
|---|
| M-MH | Machine learning (31), metal-organic frameworks (15), methanation (8), membrane (7), Metal-organic framework (6), Membrane Separation (4) etc. | 167 | |
|---|
| MI-MZ | mixing (9), MOF (5), molecular dynamics (4), Microwave (4), Microwave heating (3), Microcapsule (3) etc. | 114 | |
|---|
| N | Numerical simulation (5), nanoparticles (4), nanoparticle (3), Nickel (3), Ni catalyst (3), nanofiber (3) etc. | 83 | |
|---|
| O | Organic solvent reverse osmosis (5), Organic solvent nanofiltration (5), Optical measurement (2), Oxygen Reduction Reaction (2), Oxidation (2), Oxygen-enriched air (2) etc. | 65 | |
|---|
| P-PH | Peptide (8), PFAS (7), Photocatalyst (7), pervaporation (4), Phase equilibria (3), PEM water electrolysis (3) etc. | 118 | |
|---|
| PI-PZ | process simulation (6), Plant oil deoxygenation (5), Polyamide membrane (5), polymer electrolyte fuel cell (5), protein (4), pyrolysis (4) etc. | 184 | |
|---|
| Q | quartz crystal microbalance (2), QCM (2), Quantum Sieving (1), quality (1), Quantitative Evaluation (1), Quality management (1) etc. | 9 | |
|---|
| R | recycling (4), rheology (3), rare earth (2), Reverse osmosis (2), Renewable energy (2), Redox (2) etc. | 73 | |
|---|
| S-SO | simulation (7), self-assembly (6), silica (4), Separation (4), Solvent extraction (3), Solid oxide fuel cell (3) etc. | 137 | |
|---|
| SP-SZ | surfactant (7), Startup (6), Surface modification (4), Supercritical carbon dioxide (4), supercritical water (4), Structured catalyst (4) etc. | 134 | |
|---|
| T | Taylor-Couette flow (3), Transfer learning (3), transdermal delivery (3), thermal conductivity (3), Transdermal (2), thermal plasma (2) etc. | 73 | |
|---|
| U | Upcycling (5), Ultrafine Bubble (4), UiO-66 (2), Ultrasound (2), Unused heat utilization (1), Urea Electrosynthesis (1) etc. | 29 | |
|---|
| V | viscosity (6), Viscoelastic fluid (4), Vapor-liquid equilibria (2), Viscoelasticity (2), Value Chain (2), Valve (1) etc. | 36 | |
|---|
| W | Woody biomass (8), Water electrolysis (4), Waste plastics (3), Water electrolyzer (2), Water treatment (2), Water vapor sorption (1) etc. | 43 | |
|---|
| X | X-ray CT (1), X-type zeolite membrane (1), XPS analysis (1) | 3 | |
|---|
| Y | Yeast promoter engineering (1), YSZ (1) | 2 | |
|---|
| Z | Zeolite (10), Zwitterionic Polymer (2), zero-emission model (1), ZnO nanorods (1), Zinc-Air Battery (1), Zwitterionic copolymer grafting (1) etc. | 31 | |
|---|
| 非英数字 | * (3) | 3 | |
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