Ontology mapping
- Primary identifier
-
CHEBI:18276 - Ontology label
- dihydrogen
Synonyms (12)
| Synonym | Type | Source | Occurrences |
|---|---|---|---|
| H2 | ABBREVIATION | manual | |
| dihydrogen | SYSTEMATIC_NAME | manual | |
| Hydrogen | COMMON_NAME | manual | |
| Hydrogen (gas) | COMMON_NAME | manual | |
| E 949 | EXACT_SYNONYM | kg_microbe | |
| E-949 | EXACT_SYNONYM | kg_microbe | |
| E949 | EXACT_SYNONYM | kg_microbe | |
| H(2) | EXACT_SYNONYM | kg_microbe | |
| H2_CO2 | EXACT_SYNONYM | kg_microbe | |
| H2_methanol | EXACT_SYNONYM | kg_microbe | |
| molecular hydrogen | EXACT_SYNONYM | kg_microbe | |
| Diydrogen | RAW_TEXT | microbedecoder |
Rejected enrichment labels (1)
Provenance-only candidates: these are not synonyms and do not resolve to this record.
| Rejected label | Disposition | Source | Occurrences |
|---|---|---|---|
| aerobic catabolization: dihydrogen | REJECTED_LABEL | sssom_other_backfill |
Chemical properties
- Molecular formula
- H2
- Inchi
- InChI=1S/H2/h1H
- Smiles
- [H][H]
- Data source
- CHEBI sqlite (oaklib)
Evidence (1)
CURATOR_JUDGMENT
via manual curation
Gaseous H2 used as electron donor / headspace gas in methanogen media; dihydrogen CHEBI:18276
Occurrence statistics
- Total occurrences
- 243
- Distinct media
- 243
Curation history
| Timestamp | Curator | Action | New status | Changes |
|---|---|---|---|---|
| 2026-04-16T00:00:00+00:00 | manual | CREATED | MAPPED | Created MIM record for gaseous H2 (dihydrogen) used as electron donor |
| 2026-04-18T00:00:00+00:00 | cbclaw_kg_microbe_sweep LLM | ADDED_SYNONYMS | MAPPED | Added 7 synonyms from kg-microbe P4.4 enrichment: E 949, E-949, E949, H(2), H2_CO2, ... (2 more) |
| 2026-05-01T07:35:34.012839+00:00 | auto_classify_ingredient_type | AUTO_CLASSIFY_INGREDIENT_TYPE | set ingredient_type=SINGLE_INGREDIENT (CHEBI primary) | |
| 2026-05-01T08:08:29.992990+00:00 | auto_classify_ingredient_type | AUTO_BACKFILL_CHEBI_CHEMISTRY | molecular_formula=H2; inchi=InChI=1S/H2/h1H; smiles=[H][H] | |
| 2026-05-02T03:12:15.037123+00:00 | auto_classify_ingredient_type | AUTO_CLASSIFY_INGREDIENT_TYPE | set ingredient_type=SINGLE_INGREDIENT (chemical structure populated (molecular_formula)) | |
| 2026-08-06T08:18:48.040838+00:00 | issue_213_grounding LLM | MERGED_FROM_UNMAPPED_DUPLICATE | Absorbed UNMAPPED_0811 'Diydrogen' as a RAW_TEXT synonym -- Single-character typo for dihydrogen (#213). No new SSSOM row; CHEBI:18276 is already mapped. Source: kgmicrobe.trait:diydrogen. | |
| 2026-08-27T03:16:39.518999+00:00 | refresh_occurrence_statistics | CORRECTED | occurrence_statistics 0/0 -> 243/243 (media_count/total_occurrences), derived from distinct CultureMech recipe ids in the #337 occurrence table. The prior values came from the importer retired in #453, whose media_count counted a list truncated to 50 examples (#449). [source=ingredient_occurrences.tsv culturemech_rev=15a4da5c08 rows=194137 distinct_recipes=15257] | |
| 2026-09-02T17:40:44.716277+00:00 | claude_sssom_surface_form_backfill | ADDED_SYNONYMS | Recovered 1 surface form(s) that the published SSSOM `other` carried but no curated record did, so a rebuild would have dropped them from KGX: 'aerobic catabolization: dihydrogen'. Tokens already present on the kg-microbe ontology node were left out as redundant (#520). | |
| 2026-09-22T06:14:49.563933+00:00 | claude LLM | REJECTED_TRAIT_SYNONYMS | Retyped activity/assay phrases as provenance-only REJECTED_LABEL because they describe a process or organism trait, not an ingredient name (#703): 'aerobic catabolization: dihydrogen'. Preserved original text and source metadata. No identity, mapping, role, or remaining-synonym claim was adjudicated. |