Antibiotic Dilution / MIC Reference Calculator (education) implementation

Binding contract

This record describes what an executable surface must bind and validate. It does not claim that a public calculator, package, or production route is deployed.

Record owner

Guth Instruments

Lifecycle

verified-clean

Evidence ID

t5-187

Effect

Computation or source lookup only

Input and validation requirements

At 1075 dilution steps with stock concentration 1, the mathematical result is approximately 2.4703282292062327e-324, but plain JavaScript arithmetic underflows it to 0. The specification also leaves integer-step validation and series indexing/unit conventions implicit.

Required corrections

No binding erratum is attached to this unique-name record. Implementers must still preserve the declared units, domain, and failure behavior.

Inspectable interface fixture

The sample below is evidence for interface and validation tests, not a production implementation.

{
  "inputs": {
    "stock_concentration": 64,
    "concentration_unit": "µg/mL",
    "dilution_steps": 5,
    "output_convention": "C0 through Cn"
  },
  "expected_outputs": {
    "concentrations_ug_per_mL": [
      64,
      32,
      16,
      8,
      4,
      2
    ]
  },
  "working": "C0 = 64 µg/mL; C1 = 64/2 = 32 µg/mL; C2 = 32/2 = 16 µg/mL; C3 = 16/2 = 8 µg/mL; C4 = 8/2 = 4 µg/mL; C5 = 4/2 = 2 µg/mL."
}

Other records

Sources and evidence

These pointers bind the page to evidence. They do not grant authority or collapse verification into deployment.

• VERIFIED_LEDGER.json
• evidence-tranche5/tranche5-results.json