20_allen_80_erdschreiber_1_4_medium

CultureMech:000013 algae COMPLEX LIQUID
Original name: 20% Allen + 80% Erdschreiber (1:4) Medium

Overview

External ontology
UTEX:20-percent-allen-plus-80-percent-erdschreibers-medium (source link unavailable) — 20% Allen + 80% Erdschreiber's Medium
Applications
  • Algae cultivation
  • Phytoplankton culture
  • Microalgae research
Notes
UTEX prepares this blend by mixing prepared Allen Medium and Erdschreiber's Medium in a 1:4 ratio.

Ingredients (0)

No ingredients recorded.

Preparation

  1. Prepare Allen Medium and Erdschreiber's Medium.
  2. Combine the prepared component media.
  3. Store at refrigerator temperature.

Solutions

Allen Medium

Dose: 200 ML_PER_L

CultureMech:000024

UTEX lists 200 mL prepared Allen Medium per 1 L final medium.

Erdschreiber's Medium

Dose: 800 ML_PER_L

CultureMech:000167

UTEX lists 800 mL prepared Erdschreiber's Medium per 1 L final medium.

Target organisms

No target organisms are recorded.

Provenance

TimestampCuratorActionNotes
2026-01-28T00:00:00+00:00 utex-import Imported from UTEX Culture Collection Source ID: 20-percent-allen-plus-80-percent-erdschreibers-medium, URL: https://utex.org/products/20-percent-allen-plus-80-percent-erdschreibers-medium
2026-03-13T06:18:52.853624Z culturemech-id-assigner-v1.0 Assigned CultureMech ID Assigned stable identifier: CultureMech:000013
2026-03-17T19:45:03.830071+00:00 normalize_media_names_to_snake_case.py NAME_NORMALIZED Normalized name from "20% Allen + 80% Erdschreiber (1:4) Medium" to "20_allen_80_erdschreiber_1_4_medium" for consistent matching
2026-05-16T09:02:55.760615+00:00 migrate_legacy_fields.py MIGRATED_LEGACY_FIELDS curation_history.date->timestamp=1; references.reference_id->reference=2; category->lowercase=1
2026-05-16T09:11:00.963402+00:00 migrate_preparation_steps.py MIGRATED_PREPARATION_STEPS instruction->action+description for 9 step(s)
2026-08-30T00:58:30.484573+00:00 repair_utex_ingredients.py REPAIRED_UTEX_COMPOSITION Restored 2 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_algal_blends.py RESOLVED_UTEX_ALGAL_BLEND_GRAPH UTEX prepares this blend by mixing prepared Allen Medium and Erdschreiber's Medium in a 1:4 ratio.
2026-10-10T21:33:31.850583+00:00 codex CURATED_UTEX_PREPARED_BLEND_CONCENTRATION_EVIDENCE Retain prepared-medium addition amounts with exact source-URL/snippet evidence. No numeric changes, ontology repairs, linked-recipe certification, or taxa-media associations. Preserve the quarter-strength source ratio conflict explicitly.