Overview
Composition
flowchart LR
CultureMech_012919["CultureMech:012919"]
ing0_See_source_for_composition["See source for composition"]
CultureMech_012919 --> ing0_See_source_for_composition
Ingredients (1)
| # | Ingredient | Concentration | Ontology | Notes |
|---|---|---|---|---|
| 1 | See source for composition | variable VARIABLE |
Solutions
HCl stock (7.7 M)
Dose: 0.01 L
| Ingredient | Concentration | Notes |
|---|---|---|
| HCl | 7.7 MOLAR | Strength of the HCl stock reagent, not of the prepared FeCl2 solution. The source also labels this stock 25%, without stating the percentage basis. The former 2.5 g/L provider-derived value is not retained as an asserted prepared-stock concentration; neither density nor measured final volume is supplied. |
10 ml of the 7.7 M HCl reagent per FeCl2 preparation batch, not 10 ml per liter of receiving medium. The 25% label has unspecified basis; no percentage conversion is asserted.
Target organisms
No target organisms are recorded.
Provenance
| Timestamp | Curator | Action | Notes |
|---|---|---|---|
| 2026-03-13T06:20:28.316790Z | culturemech-id-assigner-v1.0 | Assigned CultureMech ID | Assigned stable identifier: CultureMech:012919 |
| 2026-03-14T00:00:00+00:00 | schema-defaulter-v1.0 | Applied schema defaults and normalizations | Added placeholder ingredients for missing composition |
| 2026-03-14T21:09:32.830007 | quality-tagger-v1.0 | Added data quality flag | Marked as incomplete_composition due to placeholder ingredients |
| 2026-04-04T17:50:00.631393 | categorize_unknown_media | CATEGORIZED | Automated categorization (confidence: 0.30). No clear match, defaulting to bacterial |
| 2026-05-16T09:03:55.802536+00:00 | migrate_legacy_fields.py | MIGRATED_LEGACY_FIELDS | curation_history.date->timestamp=1 |
| 2026-06-10T06:38:28.925649+00:00 | kg-fallback-consensus-v1.0 | Replaced low-confidence kg_fallback chebi_term with corpus consensus | Re-grounded 2 chebi_term(s) to the unanimous reliable CHEBI for the ingredient label seen elsewhere in the corpus (G25 Phase 1, zero external lookups). |
| 2026-10-07T09:30:59.704035+00:00 | codex | CURATED_SOLUTION_CONCENTRATION_SOURCE_EVIDENCE | Source review decision captured at plan timestamp. Exact source IDs, labels, snippets, and arithmetic checked. Unsupported rows retained; no receiving-medium concentration inferred. |
| 2026-10-08T12:33:49.789371+00:00 | codex | SEPARATED_FECL2_STOCK_ACID_STRENGTH_AND_BATCH_DOSE_WITH_EVIDENCE | Source-linked stock strength and batch dose separated. Prior chemical annotations, evidence snippets and history preserved; relocated evidence receives current field locators. FeCl2 g/L remains provider-qualified. No final-volume, density, percent-basis or organism growth claim inferred. |