bioecon Member area
Science / Bioproduction & equipment

Consumables

A consumable is the materials science of the sterile interface: film radiation chemistry, diffusion through tubing, surface chemistry for a cell.

5 pages
Explanatory reference: why a technology works and where the science is unsettled. Drafted with AI assistance; pages carry no per-claim references and have not yet been reviewed by a subject expert — use them for orientation, not as a citable source. The evidence for each technology, with graded sources, is in its dossier. How this reference is made →

The cluster is about the items at the bottom of the budget that determine the process at the top. The same materials pair runs through every page: a polymer must pass what is wanted and block what is not, and every property cuts both ways. Single-use film is sterilised by irradiation, and radiation chemistry is a choice between chain scission and crosslinking — what leaches from the film into the product stays in the product. Silicone tubing breathes, which is simultaneously the advantage (gas exchange) and the defect (loss of volatiles), while a peristaltic pump tests it with millions of compressions.

Microcarriers reduce a culture to surface chemistry: charge and extracellular matrix decide whether a cell attaches, suspension mechanics whether it is torn off. Buffers look like the dullest link until pH turns out to depend on temperature and incoming water quality to dominate cost.

Start with single-use assemblies and sterilizing-grade filters: barrier, migration and scale-out-by-parallelism are set out there.

Articles 5

Sterilizing-grade filters
"0.2 micron" is not a measurement of a hole. It is the name of a test the membrane passed.
Single-use assemblies
A sterile barrier made of a fraction of a millimetre of polymer film, irradiated after it is sealed — and its hardest science is what leaves the polymer over time.
Bioprocess tubing
Tubing is the most underestimated polymer contact in a process: gas, water vapor, hydrophobic molecules and particles all cross it — in both directions.
Microcarriers for adherent cell culture
A stirred tank offers volume; adherent cells demand surface. Microcarriers are the reconciliation — and their science is surface chemistry plus suspension mechanics.
Ready-made buffer solutions
A buffer is a weak acid, its salt and a lot of water — and the vendor's real work is managing the three ways it quietly stops being the buffer you specified.