1_4_erdschreibers_medium

CultureMech:000008 algae COMPLEX LIQUID
Original name: 1/4 Erdschreiber's Medium

Overview

External ontology
UTEX:one-fourth-erdschreibers-medium (source link unavailable) — 1/4 Erdschreiber's Medium
Applications
  • Algae cultivation
  • Phytoplankton culture
  • Microalgae research
Notes
UTEX prepares this dilution by mixing 250 mL prepared Erdschreiber's Medium with 750 mL sterile distilled water for 7.5 ppt salinity. The UTEX composition table specifies 250 mL Erdschreiber's Medium and 750 mL sterile dH2O for 1 L total (1:3 by input volume), whereas its introductory prose says 1:4. Retained quantities follow the explicit table; the source ratio conflict remains unresolved.

Composition

flowchart LR
    CultureMech_000008["1_4_erdschreibers_medium"]
    ing0_dH2O["dH2O"]
    CultureMech_000008 --> ing0_dH2O
    CHEBI_15377["CHEBI:15377"]
    ing0_dH2O -.-> CHEBI_15377

Ingredients (1)

# Ingredient Concentration Ontology Notes
1 dH2O
H2O 18.015 g/mol
750 ML_PER_L CHEBI:15377
water
 UTEX lists 750 mL sterile dH2O per 1 L final medium.

Preparation

  1. Combine prepared Erdschreiber's Medium with sterile dH2O.
  2. Store at refrigerator temperature.

Solutions

Erdschreiber's Medium

Dose: 250 ML_PER_L

CultureMech:000167

UTEX lists 250 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: one-fourth-erdschreibers-medium, URL: https://utex.org/products/one-fourth-erdschreibers-medium
2026-03-13T06:18:52.828217Z culturemech-id-assigner-v1.0 Assigned CultureMech ID Assigned stable identifier: CultureMech:000008
2026-03-17T19:45:03.806859+00:00 normalize_media_names_to_snake_case.py NAME_NORMALIZED Normalized name from "1/4 Erdschreiber's Medium" to "1_4_erdschreibers_medium" for consistent matching
2026-05-16T09:02:55.736141+00:00 migrate_legacy_fields.py MIGRATED_LEGACY_FIELDS curation_history.date->timestamp=1; references.reference_id->reference=2; category->lowercase=1
2026-05-16T09:11:00.935216+00:00 migrate_preparation_steps.py MIGRATED_PREPARATION_STEPS instruction->action+description for 9 step(s)
2026-08-30T00:58:30.449170+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 dilution by mixing 250 mL prepared Erdschreiber's Medium with 750 mL sterile distilled water for 7.5 ppt salinity.
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.