| Δm | Differential mass (mg) |
| Δt | Differential time (s) |
| Δd | Differential pore diameter (m) |
| CN | Cellulose nitrate |
| CFP | Capillary flow porometry |
| d | Pore diameter (m) |
| davg | Mean pore diameter (m) |
| dmod | More frequent pore diameter (m) |
| DMFC | Direct methanol fuel cell |
| FC | Fuel Cell |
| GLDP | Gas-liquid displacement porometry |
| HgP | Mercury porometry |
| h | Distance between the liquid reservoir level and sample surface (LEP porometry) |
| IFTS | Institut de la Filtration et des Techniques Séparatives |
| LEP | Liquid extrusion porometry |
| m | Drained mass (mg) |
| MEA | Membrane electrode assembly |
| MPS | Macroporous substrate |
| MPL | Microporous layer |
| MF | Micro filtration |
| PF | Particle filtration |
| PEMFC | Polymer electrolyte membrane fuel cells |
| PG | Gas pressure (Pa) |
| PAtm | Atmospheric pressure (Pa) |
| Pc | Capillary pressure (Pa) |
| PNS | Pore network simulation |
| PSD | Pore size distribution |
| SEM | Scanning electron microscope |
| TSD | Throat pore size distribution |
| UF | Ultrafiltration |
| γ | Surface tension of the fluid pairs (mN/m) |
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