Ledger · 2026-08-27 · Biogeochemistry & Nanomaterials

High-Porosity Vaterite Nanoparticles via Microbially Induced Calcium Carbonate Precipitation (MICP)

Rejected

This concept did not clear the framework. The reasoning is published in full below.

Why it failed

• No head-to-head evidence

Assessment

MICP for vaterite nanoparticles is thoroughly validated in literature and offers rapid batch turnaround within 2 to 24 hours. Using simple ambient mixing tanks avoids high CapEx while producing high-value drug carriers from low-cost precursors. This concept satisfies all five framework criteria.

A rejection is not a claim that the science is wrong. It means the venture case did not survive: the comparator was not what the buyer actually buys, the comparison was not like-for-like, the advantage fell short of a step change, or the capital and time to first revenue were prohibitive.

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Assessed 2026-08-27 against seven gates plus the voiding sub-tests. How the method works · Browse all concepts