Overview
- External ontology
- mediadive.medium:1761 (source link unavailable) — PFENNIG'S MEDIUM III
- Applications
-
- Microbial cultivation
- pH
- 6.0
- Notes
- Source: DSMZ | Link: https://www.dsmz.de/microorganisms/medium/pdf/DSMZ_Medium1761.pdf
Composition
flowchart LR
CultureMech_001229["pfennigs_medium_iii"]
ing0_CaCl2_x_2_H2O["CaCl2 x 2 H2O"]
CultureMech_001229 --> ing0_CaCl2_x_2_H2O
CHEBI_86158["CHEBI:86158"]
ing0_CaCl2_x_2_H2O -.-> CHEBI_86158
ing1_Na2S_x_9_H2O["Na2S x 9 H2O"]
CultureMech_001229 --> ing1_Na2S_x_9_H2O
CHEBI_76209["CHEBI:76209"]
ing1_Na2S_x_9_H2O -.-> CHEBI_76209
ing2_NaHCO3["NaHCO3"]
CultureMech_001229 --> ing2_NaHCO3
CHEBI_32139["CHEBI:32139"]
ing2_NaHCO3 -.-> CHEBI_32139
ing3_Resazurin["Resazurin"]
CultureMech_001229 --> ing3_Resazurin
CHEBI_8806["CHEBI:8806"]
ing3_Resazurin -.-> CHEBI_8806
ing4_Ammonium_chloride["Ammonium chloride"]
CultureMech_001229 --> ing4_Ammonium_chloride
CHEBI_31206["CHEBI:31206"]
ing4_Ammonium_chloride -.-> CHEBI_31206
ing5_MgSO4_x_7_H2O["MgSO4 x 7 H2O"]
CultureMech_001229 --> ing5_MgSO4_x_7_H2O
CHEBI_31795["CHEBI:31795"]
ing5_MgSO4_x_7_H2O -.-> CHEBI_31795
ing6_KCl["KCl"]
CultureMech_001229 --> ing6_KCl
CHEBI_32588["CHEBI:32588"]
ing6_KCl -.-> CHEBI_32588
ing7_KH2PO4["KH2PO4"]
CultureMech_001229 --> ing7_KH2PO4
CHEBI_63036["CHEBI:63036"]
ing7_KH2PO4 -.-> CHEBI_63036
ing8_Vitamin_B12["Vitamin B12"]
CultureMech_001229 --> ing8_Vitamin_B12
CHEBI_176843["CHEBI:176843"]
ing8_Vitamin_B12 -.-> CHEBI_176843
ing9_Ammonium_acetate["Ammonium acetate"]
CultureMech_001229 --> ing9_Ammonium_acetate
CHEBI_62947["CHEBI:62947"]
ing9_Ammonium_acetate -.-> CHEBI_62947
ing10_Magnesium_acetate["Magnesium acetate"]
CultureMech_001229 --> ing10_Magnesium_acetate
CHEBI_62964["CHEBI:62964"]
ing10_Magnesium_acetate -.-> CHEBI_62964
ing11_Na2_EDTA["Na2-EDTA"]
CultureMech_001229 --> ing11_Na2_EDTA
CHEBI_64734["CHEBI:64734"]
ing11_Na2_EDTA -.-> CHEBI_64734
ing12_FeSO4_x_7_H2O["FeSO4 x 7 H2O"]
CultureMech_001229 --> ing12_FeSO4_x_7_H2O
CHEBI_75836["CHEBI:75836"]
ing12_FeSO4_x_7_H2O -.-> CHEBI_75836
ing13_CoCl2_x_6_H2O["CoCl2 x 6 H2O"]
CultureMech_001229 --> ing13_CoCl2_x_6_H2O
CHEBI_53503["CHEBI:53503"]
ing13_CoCl2_x_6_H2O -.-> CHEBI_53503
ing14_MnCl2_x_2_H2O["MnCl2 x 2 H2O"]
CultureMech_001229 --> ing14_MnCl2_x_2_H2O
CHEBI_131395["CHEBI:131395"]
ing14_MnCl2_x_2_H2O -.-> CHEBI_131395
ing15_ZnCl2["ZnCl2"]
CultureMech_001229 --> ing15_ZnCl2
CHEBI_49976["CHEBI:49976"]
ing15_ZnCl2 -.-> CHEBI_49976
ing16_NiCl2_x_6_H2O["NiCl2 x 6 H2O"]
CultureMech_001229 --> ing16_NiCl2_x_6_H2O
CHEBI_34887["CHEBI:34887"]
ing16_NiCl2_x_6_H2O -.-> CHEBI_34887
ing17_Na2MoO4_x_2_H2O["Na2MoO4 x 2 H2O"]
CultureMech_001229 --> ing17_Na2MoO4_x_2_H2O
CHEBI_75213["CHEBI:75213"]
ing17_Na2MoO4_x_2_H2O -.-> CHEBI_75213
ing18_H3BO3["H3BO3"]
CultureMech_001229 --> ing18_H3BO3
CHEBI_33118["CHEBI:33118"]
ing18_H3BO3 -.-> CHEBI_33118
ing19_CuCl2_x_2_H2O["CuCl2 x 2 H2O"]
CultureMech_001229 --> ing19_CuCl2_x_2_H2O
CHEBI_86318["CHEBI:86318"]
ing19_CuCl2_x_2_H2O -.-> CHEBI_86318
Ingredients (20)
| # | Ingredient | Concentration | Ontology | Notes |
|---|---|---|---|---|
| 1 |
CaCl2 x 2 H2O
Ca.2Cl.2H2O 147.014 g/mol
|
0.543478 G_PER_L |
CHEBI:86158
calcium chloride dihydrate
|
|
| 2 |
Na2S x 9 H2O
9H2O.2Na.S 240.182 g/mol
|
44.8148 G_PER_L |
CHEBI:76209
sodium sulfide nonahydrate
|
[Merged 2 duplicates: 14.8148, 30.0] |
| 3 |
NaHCO3
CHO3.Na 84.006 g/mol
|
30 G_PER_L |
CHEBI:32139
sodium hydrogencarbonate
|
|
| 4 |
Resazurin
C12H7NO4 229.191 g/mol
|
0.005 G_PER_L |
CHEBI:8806
Resazurin
|
|
| 5 |
Ammonium chloride
Cl.H4N 53.492 g/mol
|
15.3846 G_PER_L |
CHEBI:31206
ammonium chloride
|
|
| 6 |
MgSO4 x 7 H2O
7H2O.Mg.O4S 246.473 g/mol
|
19.2308 G_PER_L |
CHEBI:31795
magnesium sulfate heptahydrate
|
|
| 7 |
KCl
Cl.K 74.551 g/mol
|
13.0769 G_PER_L |
CHEBI:32588
potassium chloride
|
|
| 8 |
KH2PO4
H2O4P.K 136.084 g/mol
|
13.0769 G_PER_L |
CHEBI:63036
potassium dihydrogen phosphate
|
|
| 9 | Vitamin B12 | 0.02 G_PER_L |
CHEBI:176843
vitamin B12
|
|
| 10 |
Ammonium acetate
C2H3O2.H4N 77.083 g/mol
|
25 G_PER_L |
CHEBI:62947
ammonium acetate
|
|
| 11 |
Magnesium acetate
2C2H3O2.Mg 142.393 g/mol
|
25 G_PER_L |
CHEBI:62964
magnesium acetate
|
|
| 12 |
Na2-EDTA
C10H14N2O8.2Na 336.208 g/mol
|
3 G_PER_L |
CHEBI:64734
EDTA disodium salt (anhydrous)
|
|
| 13 |
FeSO4 x 7 H2O
Fe.7H2O.O4S 278.013 g/mol
|
1.1 G_PER_L |
CHEBI:75836
iron(2+) sulfate heptahydrate
|
|
| 14 |
CoCl2 x 6 H2O
2Cl.Co.6H2O 237.929 g/mol
|
0.19 G_PER_L |
CHEBI:53503
cobalt chloride hexahydrate
|
|
| 15 |
MnCl2 x 2 H2O
Cl2Mn.2H2O 161.874 g/mol
|
0.05 G_PER_L |
CHEBI:131395
manganese(II) chloride dihydrate
|
|
| 16 |
ZnCl2
2Cl.Zn 136.296 g/mol
|
0.042 G_PER_L |
CHEBI:49976
zinc dichloride
|
|
| 17 |
NiCl2 x 6 H2O
Cl2Ni 129.599 g/mol
|
0.024 G_PER_L |
CHEBI:34887
nickel dichloride
|
|
| 18 |
Na2MoO4 x 2 H2O
2H2O.MoO4.2Na 241.946 g/mol
|
0.018 G_PER_L |
CHEBI:75213
sodium molybdate dihydrate
|
|
| 19 |
H3BO3
H3BO3 61.833 g/mol
|
0.3 G_PER_L |
CHEBI:33118
boric acid
|
|
| 20 |
CuCl2 x 2 H2O
Cl2Cu.2H2O 170.482 g/mol
|
0.002 G_PER_L |
CHEBI:86318
copper(II) chloride dihydrate
|
Preparation
- Adjust pH to 6.0.
- Mix solution D, C and E in the cotton-stoppered Erlenmeyer flask. Bubble with CO2 in an ice bath under sterile conditions (5-10 min).
- Fill 50 ml of the mixed solution (C,D,E) into each 100 ml bottle of solution A (for a total volume of approx. 96 ml).
- Before using, add 2,6 ml solution B (Na2S x 9 H2O), 0.1 ml solution F (Vitamin B12) and 1 ml of solution G (2,5% Ammonium-acetate and Magnesium-acetate) to each 100ml bottle.
- Adjust the pH with filter-sterilised 1M Na2CO3 to 7.1-7.3.
- Fill in sterile, N2 gassed screw-cap tubes under N2 gas.
- For the growth of DSM 11081 feed the culture with neutralized sulfide feeding solution regularly (approx. every 3 days). 0,5-1 ml/ 100 mL
- Fill 10x 46ml in 100 ml screw-cap bottles. Bubble with N2/CO2 and autoclave at 121°C for 15 min.
- Prepare in a screw-cap bottle, bubble with N2 to replace air, close tightly and autoclave.
- Bubble with CO2 and filter sterilize into sterile, gas-tight, 100 ml screw-cap bottle.
- Autoclave in a cotton-stoppered Erlenmeyer flask with an outlet tube for medium, connected to a glass outlet at the bottom of the vessel and has, at the other end, a silicon rubber tube with a pinch cock and a bell for aseptic dispensing of the medium into bottles. Cool to room temperature under an atmosphere of N2/CO2 in an ice bath (10-15 min).
- Filter sterilize into sterile, gas-tight, 100 ml screw-cap bottle.
- Filter sterilized
- Autoclave at 121°C for 15 min.
- The sulfide solution is prepared in a 250 ml screw-capped bottle with a butyl rubber septum and a magnetic stirrer. The solution is bubbled with nitrogen gas, closed and autoclaved for 15 min. at 121°C. After cooling to room temperature the pH is adjusted to about 7.0 by adding of sterile 2 M H2SO4 drop-wise with a syringe without opening the bottle.
Target organisms
No target organisms are recorded.
Provenance
Merged from 1 source record.
- pfennigs_medium_iii (CultureMech:001229)
| Timestamp | Curator | Action | Notes |
|---|---|---|---|
| 2026-01-26T17:53:15.440219Z | mediadive-import | Imported from MediaDive | Source: DSMZ, ID: 1761 |
| 2026-03-13T03:09:08.073095Z | data-quality-cleanup-v1.0 | Data quality fixes | Merged 1 duplicate ingredient(s) |
| 2026-03-13T06:19:02.434958Z | culturemech-id-assigner-v1.0 | Assigned CultureMech ID | Assigned stable identifier: CultureMech:001229 |
| 2026-03-17T06:30:14.000000Z | mediaingredientmech-enrichment-v1.0 | Added MediaIngredientMech links | Linked ingredients to MediaIngredientMech identifiers |
| 2026-03-17T19:45:14.260254+00:00 | normalize_media_names_to_snake_case.py | NAME_NORMALIZED | Normalized name from "PFENNIG'S MEDIUM III" to "pfennigs_medium_iii" for consistent matching |
| 2026-06-05T07:41:41.660705+00:00 | mim-legacy-to-chebi-migration-v1.0 | Refreshed legacy MediaIngredientMech links to CHEBI keying | Replaced 19 legacy mediaingredientmech_term link(s) with mediaingredientmech_chebi_term (id-safe: ingredient's own CHEBI + label). MIM deprecated the MediaIngredientMech:NNNNNN id scheme. |
| 2026-06-10T07:47:10.153283+00:00 | primary-term-label-canonicalization-v1.0 | Canonicalized primary term label to OBO canonical (OAK) | 2 primary term(s); ingredient name resolved by OAK sqlite:obo:chebi. |
| 2026-08-06T03:05:52.809829+00:00 | merge_recipes.py | MERGED_RECIPES | merged 1 source recipe(s) on fingerprint bc6236e2ea54d43cbb978254009f7bda2080ccc1dcfb8d4fe21f1d26572d209d |