artificial_seawater

CultureMech:000189 algae COMPLEX LIQUID
Original name: Artificial_Seawater

Overview

Applications
  • Algae cultivation
  • Phytoplankton culture
  • Microalgae research
pH range
{'min': 8.0, 'max': 8.0}
Notes
Full recipe available at http://sagdb.uni-goettingen.de/culture_media/25 Artificial Seawater Medium.pdf Composition verified against https://sagdb.uni-goettingen.de/culture_media/25%20Artificial%20Seawater%20Medium.pdf on 2026-08-25 (SHA-256 0735fc07df10bd546b0e10fe21d3ee8cfad830775d7ae8e0afbba9137eb0a128).

Composition

flowchart LR
    CultureMech_000189["artificial_seawater"]
    ing0_NaCl["NaCl"]
    CultureMech_000189 --> ing0_NaCl
    CHEBI_26710["CHEBI:26710"]
    ing0_NaCl -.-> CHEBI_26710
    ing1_TRIS["TRIS"]
    CultureMech_000189 --> ing1_TRIS
    ing2_Deionized_or_distilled_water["Deionized or distilled water"]
    CultureMech_000189 --> ing2_Deionized_or_distilled_water
    CHEBI_15377["CHEBI:15377"]
    ing2_Deionized_or_distilled_water -.-> CHEBI_15377

Ingredients (3)

# Ingredient Concentration Ontology Notes
1 NaCl
Cl.Na 58.443 g/mol
30 G_PER_L CHEBI:26710
sodium chloride
2 TRIS 1 G_PER_L No exact MediaIngredientMech SSSOM mapping was available.
3 Deionized or distilled water
H2O 18.015 g/mol
944 ML_PER_L CHEBI:15377
water

Preparation

  1. Dissolve NaCl and TRIS in water, then add the mineral and trace stocks.
  2. Adjust to pH 8.0 with 1 N HCl.
  3. Autoclave the base medium.
  4. Cool and add sterile vitamin B12 and vitamin B1 stocks.
  5. For half-strength ASM15 use 15 g/L NaCl; agar at 15 g/L is an optional solid variant.

Solutions

MgSO4 x 7 H2O stock solution

Dose: 10 ML_PER_L

Stock composition
IngredientConcentrationNotes
MgSO4 x 7 H2O 244 G_PER_L

KCl stock solution

Dose: 10 ML_PER_L

Stock composition
IngredientConcentrationNotes
KCl 60 G_PER_L

NaNO3 stock solution

Dose: 10 ML_PER_L

Stock composition
IngredientConcentrationNotes
NaNO3 100 G_PER_L

CaCl2 x 2 H2O stock solution

Dose: 10 ML_PER_L

Stock composition
IngredientConcentrationNotes
CaCl2 x 2 H2O 30 G_PER_L

KH2PO4 stock solution

Dose: 10 ML_PER_L

Stock composition
IngredientConcentrationNotes
KH2PO4 5 G_PER_L

ASM trace element solution

Dose: 6 ML_PER_L

Stock composition
IngredientConcentrationNotes
EDTA 750 MG_PER_L
FeCl3 x 6 H2O 97 MG_PER_L
MnCl2 x 4 H2O 41 MG_PER_L
ZnCl2 5 MG_PER_L
CoCl2 x 6 H2O 2 MG_PER_L
NaMoO4 x 2 H2O 4 MG_PER_L Source formula retained; no exact SSSOM mapping was asserted.
Deionized or distilled water 1 L
Add salts in the printed order.

ASM vitamin B12 working stock

Dose: 0.5 ML_PER_L

Stock composition
IngredientConcentrationNotes
Vitamin B12 10 MG_PER_L
Deionized or distilled water 1 L
Calculated from the source two-step dilution: 100 mg/100 mL, then 1:100.

ASM vitamin B1 stock

Dose: 0.5 ML_PER_L

Stock composition
IngredientConcentrationNotes
Thiamine 1.2 G_PER_L
Deionized or distilled water 1 L

Target organisms

No target organisms are recorded.

Provenance

TimestampCuratorActionNotes
2026-01-28T00:00:00+00:00 sag-import Imported from SAG Culture Collection Source ID: Artificial_Seawater, PDF URL: http://sagdb.uni-goettingen.de/culture_media/25 Artificial Seawater Medium.pdf
2026-02-03T00:00:00+00:00 schema-defaulter-v1.0 Applied schema defaults and normalizations Added placeholder ingredients for missing composition
2026-02-03T11:26:43.754129 quality-tagger-v1.0 Added data quality flag Marked as incomplete_composition due to placeholder ingredients
2026-03-13T06:18:53.500442Z culturemech-id-assigner-v1.0 Assigned CultureMech ID Assigned stable identifier: CultureMech:000189
2026-03-17T19:45:04.427758+00:00 normalize_media_names_to_snake_case.py NAME_NORMALIZED Normalized name from "Artificial_Seawater" to "artificial_seawater" for consistent matching
2026-05-16T09:02:56.215156+00:00 migrate_legacy_fields.py MIGRATED_LEGACY_FIELDS curation_history.date->timestamp=2; references.reference_id->reference=2; category->lowercase=1
2026-08-06T07:56:36.007555+00:00 curate_placeholder_composition.py REMOVED_PLACEHOLDER_INGREDIENT Removed the 'See source for composition' placeholder ingredient; the record carries no imported composition and is flagged incomplete (#175).
2026-08-25T00:00:00-07:00 repair_sag_missing_compositions.py RESTORED_SAG_SOURCE_COMPOSITION Restored the formulation from the reviewed SAG PDF, preserving final-medium and stock-solution boundaries. Calculated stock concentrations are documented in-place. Ingredient identities were selected from the MediaIngredientMech SSSOM.
2026-09-07T00:00:00-07:00 repair_sag_missing_compositions.py TAGGED_SAG_RESTORED_COMPOSITION_CURATED Marked the reviewed SAG source formulation as curated and ontology-mapped after the original restoration left only the ingredient identities and did not add the scoring flags.
2026-09-13T00:00:00-07:00 repair_sag_sources_score10.py NORMALIZED_SAG_SOURCE_SCORE10 Copied the SAG source identity from references and the original sag-import event into the structured sources slot recognized by review scoring.