malt_peptone

CultureMech:000204 algae COMPLEX LIQUID
Original name: Malt_Peptone

Overview

Applications
  • Algae cultivation
  • Phytoplankton culture
  • Microalgae research
Notes
Full recipe available at http://sagdb.uni-goettingen.de/culture_media/16 Malt Peptone Medium.pdf Composition verified against https://sagdb.uni-goettingen.de/culture_media/16%20Malt%20Peptone%20Medium.pdf on 2026-08-25 (SHA-256 e14903e5c117227f8bb72661a142e55d934dd3befdfe284ec0103d12134cab15).

Composition

flowchart LR
    CultureMech_000204["malt_peptone"]
    ing0_Malt_extract["Malt extract"]
    CultureMech_000204 --> ing0_Malt_extract
    ing1_Proteose_Peptone["Proteose Peptone"]
    CultureMech_000204 --> ing1_Proteose_Peptone
    ing2_Deionized_or_distilled_water["Deionized or distilled water"]
    CultureMech_000204 --> ing2_Deionized_or_distilled_water
    CHEBI_15377["CHEBI:15377"]
    ing2_Deionized_or_distilled_water -.-> CHEBI_15377

Ingredients (3)

# Ingredient Concentration Ontology Notes
1 Malt extract 10.0 G_PER_L FOODON:03301056
malt extract
2 Proteose Peptone 2.5 G_PER_L MICRO:0000180 (source link unavailable)
proteose peptone
3 Deionized or distilled water
H2O 18.015 g/mol
1 L CHEBI:15377
water

Preparation

  1. Prepare the stock solutions and combine them at the stated amounts.
  2. Autoclave at 121 C for 15 minutes following the SAG general preparation guidance.

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: Malt_Peptone, PDF URL: http://sagdb.uni-goettingen.de/culture_media/16 Malt Peptone Medium.pdf
2026-02-03T00:00:00+00:00 schema-defaulter-v1.0 Applied schema defaults and normalizations Added placeholder ingredients for missing composition
2026-02-03T11:26:43.784534 quality-tagger-v1.0 Added data quality flag Marked as incomplete_composition due to placeholder ingredients
2026-03-13T06:18:53.542220Z culturemech-id-assigner-v1.0 Assigned CultureMech ID Assigned stable identifier: CultureMech:000204
2026-03-17T19:45:04.468757+00:00 normalize_media_names_to_snake_case.py NAME_NORMALIZED Normalized name from "Malt_Peptone" to "malt_peptone" for consistent matching
2026-05-16T09:02:56.670247+00:00 migrate_legacy_fields.py MIGRATED_LEGACY_FIELDS curation_history.date->timestamp=2; references.reference_id->reference=2; category->lowercase=1
2026-08-06T07:56:36.034597+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.