Overview
- External ontology
- mediadive.medium:861 (source link unavailable) — DESULFOFRIGUS MEDIUM
- Applications
-
- Microbial cultivation
- pH range
- {'min': 7.0, 'max': 7.2}
- High-metal flag
- True
- Notes
- MediaDive and DSMZ Medium 861 define Desulfofrigus Medium as a six-stock anoxic SRB-psychrophile medium, with NaCl-rich Solution A combined with carbonate, lactate, vitamin, sulfide, and dithionite stocks.
Ingredients (0)
No ingredients recorded.
Preparation
- DSMZ Medium 861 sparges Solution A with an 80% N2 and 20% CO2 gas mixture to pH below 6, dispenses it under the same gas atmosphere into serum vials, and autoclaves it.
- DSMZ Medium 861 prepares Solutions B and F under 80% N2 and 20% CO2 and prepares sterile Solutions C, D, and E under 100% N2; Solutions D and F are sterilized by filtration.
- DSMZ Medium 861 completes the medium by adding appropriate amounts of Solutions B to F to sterile Solution A in sequence.
- DSMZ Medium 861 final pH should be 7.0-7.2.
Solutions
Solution A
Dose: 948.207 ML_PER_L
| Ingredient | Concentration | Notes |
|---|---|---|
| NaCl | 21.0084 G_PER_L | DSMZ Medium 861 lists 21.0084 G_PER_L NaCl. |
| Na2SO4 | 4.20168 G_PER_L | DSMZ Medium 861 lists 4.20168 G_PER_L Na2SO4. |
| KH2PO4 | 0.210084 G_PER_L | DSMZ Medium 861 lists 0.210084 G_PER_L KH2PO4. |
| NH4Cl | 0.262605 G_PER_L | DSMZ Medium 861 lists 0.262605 G_PER_L NH4Cl. |
| MgCl2 x 6 H2O | 3.15126 G_PER_L | DSMZ Medium 861 lists 3.15126 G_PER_L MgCl2 x 6 H2O. |
| CaCl2 x 2 H2O | 0.157563 G_PER_L | DSMZ Medium 861 lists 0.157563 G_PER_L CaCl2 x 2 H2O. |
| KBr | 0.0945378 G_PER_L | DSMZ Medium 861 lists 0.0945378 G_PER_L KBr. |
| KCl | 0.52521 G_PER_L | DSMZ Medium 861 lists 0.52521 G_PER_L KCl. |
| Sodium resazurin | 0.00052521 G_PER_L | DSMZ Medium 861 lists 0.00052521 G_PER_L Sodium resazurin. |
| Distilled water | 997.899 ML_PER_L | DSMZ Medium 861 lists 997.899 ML_PER_L Distilled water. |
DSMZ Medium 861 adds 952 ml/L Solution A to the completed 861-family medium.
Trace element solution SL-10
Dose: 1.05042 ML_PER_L
| Ingredient | Concentration | Notes |
|---|---|---|
| HCl | 2.5 G_PER_L | DSMZ Medium 861 lists 2.5 G_PER_L HCl. |
| FeCl2 x 4 H2O | 1.5 G_PER_L | DSMZ Medium 861 lists 1.5 G_PER_L FeCl2 x 4 H2O. |
| ZnCl2 | 0.07 G_PER_L | DSMZ Medium 861 lists 0.07 G_PER_L ZnCl2. |
| MnCl2 x 4 H2O | 0.1 G_PER_L | DSMZ Medium 861 lists 0.1 G_PER_L MnCl2 x 4 H2O. |
| H3BO3 | 0.006 G_PER_L | DSMZ Medium 861 lists 0.006 G_PER_L H3BO3. |
| CoCl2 x 6 H2O | 0.19 G_PER_L | DSMZ Medium 861 lists 0.19 G_PER_L CoCl2 x 6 H2O. |
| CuCl2 x 2 H2O | 0.002 G_PER_L | DSMZ Medium 861 lists 0.002 G_PER_L CuCl2 x 2 H2O. |
| NiCl2 x 6 H2O | 0.024 G_PER_L | DSMZ Medium 861 lists 0.024 G_PER_L NiCl2 x 6 H2O. |
| Na2MoO4 x 2 H2O | 0.036 G_PER_L | DSMZ Medium 861 lists 0.036 G_PER_L Na2MoO4 x 2 H2O. |
| Distilled water | 990 ML_PER_L | DSMZ Medium 861 lists 990 ML_PER_L Distilled water. |
DSMZ Medium 861 Solution A adds 1 ml/L Trace element solution SL-10.
Selenite-tungstate solution
Dose: 1.05042 ML_PER_L
| Ingredient | Concentration | Notes |
|---|---|---|
| NaOH | 0.5 G_PER_L | DSMZ Medium 861 lists 0.5 G_PER_L NaOH. |
| Na2SeO3 x 5 H2O | 0.003 G_PER_L | DSMZ Medium 861 lists 0.003 G_PER_L Na2SeO3 x 5 H2O. |
| Na2WO4 x 2 H2O | 0.004 G_PER_L | DSMZ Medium 861 lists 0.004 G_PER_L Na2WO4 x 2 H2O. |
| Distilled water | 1000 ML_PER_L | DSMZ Medium 861 lists 1000 ML_PER_L Distilled water. |
DSMZ Medium 861 Solution A adds 1 ml/L Selenite-tungstate solution.
Solution B
Dose: 29.8805 ML_PER_L
| Ingredient | Concentration | Notes |
|---|---|---|
| Na2CO3 | 50 G_PER_L | DSMZ Medium 861 lists 50 G_PER_L Na2CO3. |
| Distilled water | 1000 ML_PER_L | DSMZ Medium 861 lists 1000 ML_PER_L Distilled water. |
DSMZ Medium 861 adds 29.8805 ml/L Solution B.
Solution C
Dose: 9.96016 ML_PER_L
| Ingredient | Concentration | Notes |
|---|---|---|
| Na-DL-lactate | 250 G_PER_L | DSMZ Medium 861 lists 250 G_PER_L Na-DL-lactate. |
| Distilled water | 1000 ML_PER_L | DSMZ Medium 861 lists 1000 ML_PER_L Distilled water. |
DSMZ Medium 861 adds 9.96016 ml/L Solution C.
Solution D
Dose: 0.996016 ML_PER_L
DSMZ Medium 861 adds 0.996016 ml/L Solution D.
Wolin's vitamin solution (10x)
Dose: 1000 ML_PER_L
| Ingredient | Concentration | Notes |
|---|---|---|
| Biotin | 0.02 G_PER_L | DSMZ Medium 861 lists 0.02 G_PER_L Biotin. |
| Folic acid | 0.02 G_PER_L | DSMZ Medium 861 lists 0.02 G_PER_L Folic acid. |
| Pyridoxine hydrochloride | 0.1 G_PER_L | DSMZ Medium 861 lists 0.1 G_PER_L Pyridoxine hydrochloride. |
| Thiamine HCl | 0.05 G_PER_L | DSMZ Medium 861 lists 0.05 G_PER_L Thiamine HCl. |
| Riboflavin | 0.05 G_PER_L | DSMZ Medium 861 lists 0.05 G_PER_L Riboflavin. |
| Nicotinic acid | 0.05 G_PER_L | DSMZ Medium 861 lists 0.05 G_PER_L Nicotinic acid. |
| Calcium D-(+)-pantothenate | 0.05 G_PER_L | DSMZ Medium 861 lists 0.05 G_PER_L Calcium D-(+)-pantothenate. |
| Vitamin B12 | 0.001 G_PER_L | DSMZ Medium 861 lists 0.001 G_PER_L Vitamin B12. |
| p-Aminobenzoic acid | 0.05 G_PER_L | DSMZ Medium 861 lists 0.05 G_PER_L p-Aminobenzoic acid. |
| (DL)-alpha-Lipoic acid | 0.05 G_PER_L | DSMZ Medium 861 lists 0.05 G_PER_L (DL)-alpha-Lipoic acid. |
| Distilled water | 1000 ML_PER_L | DSMZ Medium 861 lists 1000 ML_PER_L Distilled water. |
DSMZ Medium 861 Solution D consists of Wolin's vitamin solution.
Solution E
Dose: 9.96016 ML_PER_L
| Ingredient | Concentration | Notes |
|---|---|---|
| Na2S x 9 H2O | 30 G_PER_L | DSMZ Medium 861 lists 30 G_PER_L Na2S x 9 H2O. |
| Distilled water | 1000 ML_PER_L | DSMZ Medium 861 lists 1000 ML_PER_L Distilled water. |
DSMZ Medium 861 adds 9.96016 ml/L Solution E.
Solution F
Dose: 0.996016 ML_PER_L
DSMZ Medium 861 adds 0.996016 ml/L Solution F.
Na-dithionite solution (5% w/v)
Dose: 1000 ML_PER_L
| Ingredient | Concentration | Notes |
|---|---|---|
| NaOH | 50 ML_PER_L | DSMZ Medium 861 lists 50 ML_PER_L NaOH. |
| Na2S2O4 | 50 G_PER_L | DSMZ Medium 861 lists 50 G_PER_L Na2S2O4. |
| Distilled water | 950 ML_PER_L | DSMZ Medium 861 lists 950 ML_PER_L Distilled water. |
DSMZ Medium 861 Solution F consists of 5% w/v Na-dithionite solution.
Target organisms
No target organisms are recorded.
Provenance
| Timestamp | Curator | Action | Notes |
|---|---|---|---|
| 2026-01-26T17:53:12.540493Z | mediadive-import | Imported from MediaDive | Source: DSMZ, ID: 861 |
| 2026-02-06T05:10:37.923006Z | invalid-chebi-removal | Removed 1 invalid CHEBI ID(s) | Removed CHEBI IDs with invalid format (7+ digits) from MicrobeMediaParam source data |
| 2026-03-13T03:09:17.973538Z | data-quality-cleanup-v1.0 | Data quality fixes | Merged 1 duplicate ingredient(s) |
| 2026-03-13T06:19:09.466897Z | culturemech-id-assigner-v1.0 | Assigned CultureMech ID | Assigned stable identifier: CultureMech:002020 |
| 2026-03-17T06:30:25.000000Z | mediaingredientmech-enrichment-v1.0 | Added MediaIngredientMech links | Linked ingredients to MediaIngredientMech identifiers |
| 2026-03-17T19:45:22.032071+00:00 | normalize_media_names_to_snake_case.py | NAME_NORMALIZED | Normalized name from "DESULFOFRIGUS MEDIUM" to "desulfofrigus_medium" for consistent matching |
| 2026-05-20T06:01:13.894356+00:00 | migrate_ph_range.py | MIGRATED_PH_RANGE | ph_range '7-7.2' -> {'min': 7.0, 'max': 7.2} |
| 2026-06-05T07:40:56.665348+00:00 | mim-legacy-to-chebi-migration-v1.0 | Refreshed legacy MediaIngredientMech links to CHEBI keying | Replaced 33 legacy mediaingredientmech_term link(s) with mediaingredientmech_chebi_term (id-safe: ingredient's own CHEBI + label). MIM deprecated the MediaIngredientMech:NNNNNN id scheme. |
| 2026-06-10T07:46:55.597852+00:00 | primary-term-label-canonicalization-v1.0 | Canonicalized primary term label to OBO canonical (OAK) | 6 primary term(s); ingredient name resolved by OAK sqlite:obo:chebi. |
| 2026-09-02T07:38:02.183443+00:00 | repair_merged_duplicates.py | REPAIRED_SUMMED_DUPLICATE_MERGE | Collapsed 1 ingredient row(s) whose concentration was the SUM of identical duplicate values written by cleanup_media_quality.py. Every merged part was the same value, so the pre-merge value is unambiguous and no source lookup was needed. Rows whose merged parts differ were left untouched. |
| 2026-09-12T00:00:00-07:00 | repair_dsmz_861_desulfotalea_score15.py | RESOLVED_DSMZ_KOMODO_861_DESULFOTALEA_SCORE15 | MediaDive and DSMZ Medium 861 define Desulfofrigus Medium as a six-stock anoxic SRB-psychrophile medium, with NaCl-rich Solution A combined with carbonate, lactate, vitamin, sulfide, and dithionite stocks. |