When we talk about a membrane being “permeable,” we usually mean two different things and use one word for both. Diffusive permeability is how easily molecules cross the membrane by diffusion. Hydraulic permeability is how easily water flows through it…

The insert was designed for a different chip. We ran it on 3-slot chips anyway to see whether the outer windows break — and whether it matters when they do.

Six hundred flow insert ports, four numbers each, and a shape score. Shape and aperture turn out to be completely uncorrelated — and the analysis now refuses to guess on the ambiguous ones.

Cells were dying and the bonding region looked yellow. We leached six chips in hot nitric acid and ran 60 elements by ICP-MS. Both chip types look clean.

Manufacturer’s Data Logged by: Ahmet Gurcan Membrane Type: MSSN 1 micron Microslit SKU: MSSN400.C-3LX.1-1.0E2 Lot Number: 240913-25 Quantity Received: 340 Manufacturer Test Report: Flow Data Avg in SLPM 1psi: 1.67 2psi: 3.1 4psi: 5.19 15psi: 11.87 Burst: 39.9 PSI

Manufacturer’s Data Logged by: Ahmet Gurcan Membrane Type: MSSN 1 micron Microslit SKU: MSSN400.C-3LX.1-1.0E2 Lot Number: 250409-06 Quantity Received: 160 Manufacturer Test Report: Flow Data Avg in SLPM 4psi: 5.1 15psi: 11.87 Burst: 45.45 PSI

Manufacturer’s Data Logged by: Ahmet Gurcan Membrane Type: MSSN 1 micron Microslit – Gold Coated SKU: MSSN400.C-3LX.1-1.0E2-AU Lot Number: 240918-24 Quantity Received: 200 Manufacturer Test Report: Flow Data Avg in SLPM 4psi: 4.5 15psi: 10.58 Burst: 66.78 PSI

Manufacturer’s Data Logged by: Ahmet Gurcan Membrane Type: MSSN 8 micron Microslit – Gold Coated SKU: MSSN400.C-3LX.1-8.0K2-AU Lot Number: 251028-10 Quantity Received: 200 Manufacturer Test Report: Flow Data Avg in SLPM 15psi: 7.6 Burst: 16.1 PSI

Manufacturer’s Data Logged by: Ahmet Gurcan Membrane Type: MSSN 0.5 micron Microslit SKU: MSSN400.C-3LX.1-0.5E1 Lot Number: 250409-13 Quantity Received: 250 Manufacturer Test Report: Flow Data Avg in SLPM 4psi: 3.96 15psi: 14.4 Burst: 9.82 PSI

Manufacturer’s Data Logged by: Ahmet Gurcan Membrane Type: MSSN 0.5 micron Microslit SKU: MSSN400.C-3LX.1-0.5E1 Lot Number: 251028-02 Quantity Received: 250 Manufacturer Test Report: Flow Data Avg in SLPM 4psi: 3.88 15psi: N/A Burst: 9.22 PSI