Overview
- External ontology
- UTEX:malt-medium (source link unavailable) — Malt Medium
- Applications
-
- Algae cultivation
- Phytoplankton culture
- Microalgae research
- Notes
- UTEX prepares Malt Medium with 33.6 g malt extract per 500 mL dH2O and autoclaves for no longer than 15 minutes.
Composition
flowchart LR
CultureMech_000175["malt_medium"]
ing0_Malt_extract["Malt extract"]
CultureMech_000175 --> ing0_Malt_extract
Ingredients (1)
| # | Ingredient | Concentration | Ontology | Notes |
|---|---|---|---|---|
| 1 |
Malt extract
Sigma M-0383
|
67.2 G_PER_L (per liter of starting dH2O before malt extract addition) |
FOODON:03301056
Malt extract
|
The source adds 33.6 g malt extract to 500 mL dH2O. The retained 67.2 g/L denotes mass per liter of starting water, not an independently established final-medium concentration. |
Preparation
- Dissolve 33.6 g malt extract in 500 mL dH2O.
- Cover and autoclave for no longer than 15 minutes to avoid caramelizing sugars.
- Store at refrigerator temperature.
Target organisms
No target organisms are recorded.
Recipe variants
- Name
- Malt Medium with agar
- Relationship
- SUPPLEMENTED_VARIANT
- Description
- Optional source-listed agar formulation; the parent remains liquid.
- Modifications
- Add 7.5 g agar to the source batch starting with 500 mL dH2O; do not mix. This is an input dose, not a measured final-volume concentration.
- Purpose
- Preserve the separately specified solid formulation
- Evidence
- Reference
- https://utex.org/products/malt-medium
- Supports
- SUPPORT
- Snippet
- For 1.5% agar medium add 7.5 g of agar into the flask; do not mix.
- Explanation
- Supports variants[0].modifications only. The source labels this the 1.5% agar formulation; no new measured final volume after agar addition is claimed. No agar is added to the liquid parent.
Provenance
| Timestamp | Curator | Action | Notes |
|---|---|---|---|
| 2026-01-28T00:00:00+00:00 | utex-import | Imported from UTEX Culture Collection | Source ID: malt-medium, URL: https://utex.org/products/malt-medium |
| 2026-03-13T06:18:53.423657Z | culturemech-id-assigner-v1.0 | Assigned CultureMech ID | Assigned stable identifier: CultureMech:000175 |
| 2026-03-17T19:45:04.358804+00:00 | normalize_media_names_to_snake_case.py | NAME_NORMALIZED | Normalized name from "Malt Medium" to "malt_medium" for consistent matching |
| 2026-05-16T09:02:56.026345+00:00 | migrate_legacy_fields.py | MIGRATED_LEGACY_FIELDS | curation_history.date->timestamp=1; references.reference_id->reference=2; category->lowercase=1 |
| 2026-05-16T09:11:01.230970+00:00 | migrate_preparation_steps.py | MIGRATED_PREPARATION_STEPS | instruction->action+description for 9 step(s) |
| 2026-08-30T00:58:30.848176+00:00 | repair_utex_ingredients.py | REPAIRED_UTEX_COMPOSITION | Restored 1 ingredient name(s) and amount(s) from a re-fetched UTEX capture. The original fetcher read fixed column positions, so the row ordinal was stored as the ingredient name, the component name as the amount, and the Amount column was never read; concentration was then filled in as G_PER_L regardless. Source: https://utex.org/pages/algal-culture-media, captured 2026-08-29T17:46:40.207779. |
| 2026-09-06T00:00:00-07:00 | repair_utex_remaining_score50.py | RESOLVED_UTEX_SCORE50_ALGAE_GRAPH | UTEX prepares Malt Medium with 33.6 g malt extract per 500 mL dH2O and autoclaves for no longer than 15 minutes. |
| 2026-10-10T21:08:21.569593+00:00 | codex | CURATED_UTEX_ORGANIC_MEDIUM_INPUT_BASES_AND_CONCENTRATION_EVIDENCE | Exact source-URL and snippet evidence for input doses, optional agar and retained concentrations. Chemical identity mappings and unrelated growth/role claims are unchanged, not independently certified. No taxa-media association added. |