Overview
- External ontology
- nbrc.medium:903 (source link unavailable) — NBRC Medium 903
- pH
- 7.0
- Notes
- Source: NBRC Medium 903 | Link: https://www.nite.go.jp/nbrc/catalogue/NBRCMediumDetailServlet?NO=903 The NBRC TcP Medium table lists trace-mineral and vitamin stock solutions, pH adjustment to 7.0 before N2 autoclaving, separate sterilization of the vitamin, sulfur, and sulfide additions, and aseptic anaerobic addition before inoculation.
Composition
flowchart LR
CultureMech_007503["904"]
ing0_NaCl["NaCl"]
CultureMech_007503 --> ing0_NaCl
CHEBI_26710["CHEBI:26710"]
ing0_NaCl -.-> CHEBI_26710
ing1_KCl["KCl"]
CultureMech_007503 --> ing1_KCl
CHEBI_32588["CHEBI:32588"]
ing1_KCl -.-> CHEBI_32588
ing2_NH4Cl["NH4Cl"]
CultureMech_007503 --> ing2_NH4Cl
CHEBI_31206["CHEBI:31206"]
ing2_NH4Cl -.-> CHEBI_31206
ing3_MgCl2_6H2O["MgCl2·6H2O"]
CultureMech_007503 --> ing3_MgCl2_6H2O
CHEBI_86345["CHEBI:86345"]
ing3_MgCl2_6H2O -.-> CHEBI_86345
ing4_MgSO4_7H2O["MgSO4·7H2O"]
CultureMech_007503 --> ing4_MgSO4_7H2O
ing5_FeSO4_7H2O["FeSO4·7H2O"]
CultureMech_007503 --> ing5_FeSO4_7H2O
CHEBI_75836["CHEBI:75836"]
ing5_FeSO4_7H2O -.-> CHEBI_75836
ing6_K2HPO4["K2HPO4"]
CultureMech_007503 --> ing6_K2HPO4
CHEBI_131527["CHEBI:131527"]
ing6_K2HPO4 -.-> CHEBI_131527
ing7_NaBr["NaBr"]
CultureMech_007503 --> ing7_NaBr
CHEBI_63004["CHEBI:63004"]
ing7_NaBr -.-> CHEBI_63004
ing8_Trace_minerals_["Trace minerals*"]
CultureMech_007503 --> ing8_Trace_minerals_
ing9_Vitamin_solution__["Vitamin solution**"]
CultureMech_007503 --> ing9_Vitamin_solution__
ing10_Bacto_Yeast_Extract__Difco_["Bacto Yeast Extract (Difco)"]
CultureMech_007503 --> ing10_Bacto_Yeast_Extract__Difco_
ing11_Bacto_Tryptone__Difco_["Bacto Tryptone (Difco)"]
CultureMech_007503 --> ing11_Bacto_Tryptone__Difco_
ing12_PIPES["PIPES"]
CultureMech_007503 --> ing12_PIPES
CHEBI_39033["CHEBI:39033"]
ing12_PIPES -.-> CHEBI_39033
ing13_Sulfur__powder_["Sulfur (powder)"]
CultureMech_007503 --> ing13_Sulfur__powder_
CHEBI_33403["CHEBI:33403"]
ing13_Sulfur__powder_ -.-> CHEBI_33403
ing14_Resazurin["Resazurin"]
CultureMech_007503 --> ing14_Resazurin
CHEBI_8806["CHEBI:8806"]
ing14_Resazurin -.-> CHEBI_8806
ing15_Na2S_9H2O["Na2S·9H2O"]
CultureMech_007503 --> ing15_Na2S_9H2O
CHEBI_76209["CHEBI:76209"]
ing15_Na2S_9H2O -.-> CHEBI_76209
ing16_Distilled_water["Distilled water"]
CultureMech_007503 --> ing16_Distilled_water
CHEBI_15377["CHEBI:15377"]
ing16_Distilled_water -.-> CHEBI_15377
Ingredients (17)
| # | Ingredient | Concentration | Ontology | Notes |
|---|---|---|---|---|
| 1 |
NaCl
Cl.Na 58.443 g/mol
|
30 G_PER_L |
CHEBI:26710
sodium chloride
|
|
| 2 |
KCl
Cl.K 74.551 g/mol
|
0.33 G_PER_L |
CHEBI:32588
potassium chloride
|
|
| 3 |
NH4Cl
Cl.H4N 53.492 g/mol
|
0.25 G_PER_L |
CHEBI:31206
ammonium chloride
|
|
| 4 |
MgCl2·6H2O
2Cl.6H2O.Mg 203.301 g/mol
|
2.8 G_PER_L |
CHEBI:86345
MgCl2 x 6 H2O
|
|
| 5 | MgSO4·7H2O | 3.4 G_PER_L | ||
| 6 |
FeSO4·7H2O
Fe.7H2O.O4S 278.013 g/mol
|
0.025 G_PER_L |
CHEBI:75836
FeSO4 x 7 H2O
|
|
| 7 |
K2HPO4
HO4P.2K 174.174 g/mol
|
0.3 G_PER_L |
CHEBI:131527
dipotassium hydrogen phosphate
|
|
| 8 |
NaBr
Br.Na 102.894 g/mol
|
0.01 G_PER_L |
CHEBI:63004
sodium bromide
|
|
| 9 | Trace minerals* | 10 ML_PER_L | ||
| 10 | Vitamin solution** | 10 ML_PER_L | ||
| 11 | Bacto Yeast Extract (Difco) | 3 G_PER_L |
FOODON:03315426
Yeast extract
|
|
| 12 | Bacto Tryptone (Difco) | 3 G_PER_L |
MICRO:0000182 (source link unavailable)
Tryptone
|
|
| 13 | PIPES | 6 G_PER_L |
CHEBI:39033
PIPES
|
|
| 14 | Sulfur (powder) | 10 G_PER_L |
CHEBI:33403
elemental sulfur
|
|
| 15 |
Resazurin
C12H7NO4 229.191 g/mol
|
1 MG_PER_L |
CHEBI:8806
Resazurin
|
|
| 16 |
Na2S·9H2O
9H2O.2Na.S 240.182 g/mol
|
0.5 G_PER_L |
CHEBI:76209
sodium sulfide nonahydrate
|
|
| 17 |
Distilled water
H2O 18.015 g/mol
|
1 L |
CHEBI:15377
water
|
Preparation
- Mix ingredients except vitamin solution, sulfur, and Na2S·9H2O.
- Adjust pH to 7.0.
- Autoclave under a N2 atmosphere.
- Filter-sterilize the vitamin solution.
- Sterilize sulfur by autoclaving for 60 minutes at 105 C on each of 3 successive days.
- Neutralize Na2S·9H2O as a 5% solution and autoclave under N2.
- Before inoculation, aseptically and anaerobically add vitamin, sulfur, and Na2S·9H2O.
Solutions
Trace minerals
| Ingredient | Concentration | Notes |
|---|---|---|
| Nitrilotriacetic acid | 1.5 G_PER_L | |
| MgSO4·7H2O | 3 G_PER_L | |
| MnSO4·xH2O | 0.5 G_PER_L | |
| NaCl | 1 G_PER_L | |
| FeSO4·7H2O | 0.1 G_PER_L | |
| CoSO4·7H2O | 0.1 G_PER_L | |
| CaCl2·2H2O | 0.1 G_PER_L | |
| ZnSO4·7H2O | 0.1 G_PER_L | |
| CuSO4·5H2O | 0.01 G_PER_L | |
| AlK(SO4)2 | 0.01 G_PER_L | |
| H3BO3 | 0.01 G_PER_L | |
| Na2MoO4·2H2O | 0.01 G_PER_L | |
| Distilled water | 1 L |
Vitamin solution
| Ingredient | Concentration | Notes |
|---|---|---|
| Biotin | 2 MG_PER_L | |
| Folic acid | 2 MG_PER_L | |
| Pyridoxine-HCl | 10 MG_PER_L | |
| Thiamine-HCl | 5 MG_PER_L | |
| Riboflavin | 5 MG_PER_L | |
| Nicotinic acid | 5 MG_PER_L | |
| Ca-pantothenate | 5 MG_PER_L | |
| Vitamin B12 | 0.1 MG_PER_L | |
| p-Aminobenzoic acid | 5 MG_PER_L | |
| Lipoic acid | 5 MG_PER_L | |
| Distilled water | 1 L |
Target organisms
No target organisms are recorded.
Provenance
| Timestamp | Curator | Action | Notes |
|---|---|---|---|
| 2026-02-20T00:22:35.983280Z | nbrc-import | Imported from NBRC | Source: NBRC, Media No. 903, URL: http://www.nbrc.nite.go.jp/NBRC2/NBRCMediumDetailServlet?NO=903. Imported via ethical web scraping. |
| 2026-03-09T08:04:25.133107+00:00 | solution-migrator-v1.0 | Migrated solutions from ingredients to solutions array | Moved 1 solution(s) from ingredients |
| 2026-03-13T03:08:53.618619Z | data-quality-cleanup-v1.0 | Data quality fixes | Merged 92 duplicate ingredient(s) |
| 2026-03-13T06:19:49.278821Z | culturemech-id-assigner-v1.0 | Assigned CultureMech ID | Assigned stable identifier: CultureMech:007503 |
| 2026-03-14T00:00:00+00:00 | schema-defaulter-v1.0 | Applied schema defaults and normalizations | Added default solution name |
| 2026-05-16T09:03:06.741572+00:00 | migrate_legacy_fields.py | MIGRATED_LEGACY_FIELDS | curation_history.date->timestamp=1 |
| 2026-08-19T21:54:23.048002+00:00 | recover_nbrc_composition.py | Recovered composition from source HTML | Re-parsed the NBRC medium 903 composition table from the preserved scrape; 17 ingredient(s) restored, 2 stock solution(s) nested rather than flattened, 1 unparsed solution blob(s) removed (#299). |
| 2026-08-20T19:01:16.127673+00:00 | apply_mim_groundings.py | Adopted MIM published grounding | Grounded 19 ingredient(s) from MIM's ingredient_mappings.sssom.tsv (2026-08-18), exactMatch only, where this record carried no CHEBI term (#308). |
| 2026-08-26T02:12:33.107237+00:00 | apply_mim_groundings.py | Adopted MIM published grounding | Grounded 1 ingredient(s) from MIM's ingredient_mappings.sssom.tsv (2026-08-18), exactMatch only, where this record carried no CHEBI term (#308). |
| 2026-09-07T00:00:00-07:00 | repair_nbrc_partial_score25.py | RESOLVED_NBRC_PARTIAL_SCORE25 | Preserved the recovered NBRC Medium 903 composition table. |