Malt Extract Agar Medium (MEA) - BioReagent

Cat. No.: M1528519

GRADE & PURITY BioReagent

Storage

Room temperature

Shipped In

Normal

Visão geral

For fungicidal testing

Specifications

Especificações e pureza

BioReagent

Condições de armazenamento de armazenamento

Room temperature

Enviado em

Normal

Grau

BioReagent

Product Line

biological_products

Application Protocols

No manufacturer-validated protocols are provided for this SKU. Not specified for this item; refer to CoA/Spec Sheet and SDS. Users should follow institutional SOPs or relevant standards for medium preparation, sterilization, plate pouring, incubation, and enumeration.

Biological Roles

MEA does not have an intrinsic biological role as a single molecule; instead, it provides a nutrient environment that supports the biology of yeasts and filamentous fungi (literature/general information).

• Nutritional profile and function

  • Carbohydrate-rich malt extract supplies fermentable sugars (e.g., maltose, glucose) and dextrins, fueling glycolysis and fermentation/respiration.
  • Trace nitrogen, vitamins, and minerals (from malt extract and any peptone/yeast extract present) support biosynthesis of amino acids, nucleotides, and cofactors.
  • Agar provides a solid matrix enabling colony isolation and morphological observation without being metabolized by most fungi.

• Biological outcomes facilitated by MEA

  • Efficient colony formation and sporulation for many molds, enabling taxonomic and phenotypic assessment.
  • Selective advantage for fungi over many bacteria due to slightly acidic pH and carbohydrate profile, aiding in yeast/mold counts from mixed samples.

• Methodological context

  • Common in environmental monitoring, food/beverage microbiology, and industrial strain maintenance where fungal viability and morphology are critical endpoints.

Note: This information describes typical biological performance characteristics reported in the literature and does not constitute a specification for SKU M1528519.

Buffer Applications

MEA is not a defined buffering system and is not used to prepare precise pH buffer solutions. Its intrinsic pH after preparation is determined by its formulation and sterilization conditions. For workflows requiring controlled buffering capacity, prepare a dedicated buffer or select a defined medium designed for pH control.

Green Alternatives

From a green chemistry perspective, MEA is water-based and used at ambient pressures with steam sterilization, which is relatively benign compared to solvent-intensive processes. Consider the following when optimizing environmental impact (literature/general guidance):

• Resource considerations

  • Use only the volume required; prepare small batches to minimize waste of gelled plates that expire.
  • Optimize autoclave loading to improve energy efficiency per cycle.

• Media choice trade-offs

  • MEA (malt-derived carbohydrates) vs PDA (potato-derived) vs SDA (high dextrose): All are water-based; environmental profiles are broadly similar. Selection should prioritize performance to reduce repeat work and waste.

• Packaging and disposal

  • Store in tightly sealed containers to prevent moisture uptake and product spoilage, reducing waste.
  • Dispose of used plates as biohazardous waste after appropriate decontamination (e.g., autoclaving), following institutional and local regulations.

• Comparison snapshot (general)

  • MEA: Good for diverse fungi; slightly acidic; supports sporulation for many molds.
  • PDA: Often enhances sporulation/pigmentation for certain species; potato infusion character.
  • SDA: Higher dextrose and low pH can be more selective for fungi.

Selecting the medium that yields reliable growth the first time is typically the “greenest” option due to reduced repeats and resource use.

Pharmaceutical Uses

No therapeutic or clinical uses are claimed. In pharmaceutical and biomanufacturing quality systems, dehydrated culture media like MEA may be used as part of non-clinical laboratory workflows (literature/general information):

• Potential roles in GMP-adjacent contexts (user-validated only)
  • Environmental monitoring or bioburden assessment for yeasts and molds in facilities where a carbohydrate-rich, slightly acidic medium is appropriate.
  • Raw material/utility monitoring (e.g., compressed air, water systems) for fungal contaminants when justified by risk assessment.

Any use in regulated environments requires user qualification, method validation, and alignment with compendial methods/SOPs. This product is labeled: For research use only.

Physical Properties

As a dehydrated culture medium, MEA is supplied as a solid blend; properties below reflect general expectations for this class of products.

• Appearance: Not specified for this item; refer to CoA/Spec Sheet.
• Moisture content, particle size: Not specified for this item; refer to CoA/Spec Sheet.
• Solubility: Freely dispersible in purified water upon heating/sterilization (literature/general information for dehydrated media).
• pH (ready-to-use medium): Typical final pH around 5.5–5.7 at 25 °C after preparation (literature value; not a specification for this item).
• Gelation: Thermo-reversible gel; sets on cooling after autoclaving/melting due to agar (literature/general information).
• Density/bulk density: Not specified for this item; refer to CoA/Spec Sheet.
• Refractive index, logP, boiling point, melting point: Not applicable/Not defined for a complex, multi-component dry blend; Not specified for this item; refer to CoA/Spec Sheet.

Note: Do not treat literature values as specifications. For lot-specific physical data, consult the CoA/Spec Sheet for SKU M1528519.

Quality and Grades

• Supplied grade

  • BioReagent: Indicates suitability for laboratory research applications requiring consistent performance in biological workflows. Typically implies controlled bioburden and performance-tested growth characteristics, though the exact acceptance criteria are product- and lot-specific. For this item, lot-specific acceptance data are Not specified for this item; refer to CoA/Spec Sheet.

• What BioReagent means in practice (general)

  • Raw materials sourced to support reproducible microbial growth characteristics.
  • Blend homogeneity and moisture control to enable consistent reconstitution and gel strength (when agar is present).
  • May include performance tests (e.g., growth promotion testing with representative yeast/mold strains) as part of QC, but specific organisms and recovery criteria must be verified on the CoA/Spec Sheet for this SKU.

• Stabilizers/antimicrobials

  • No chemical preservatives are normally included in dehydrated media; sterility is achieved by user sterilization post-reconstitution (literature/general). Any stabilizer content is Not specified for this item; refer to CoA/Spec Sheet.

• Documentation

  • For regulated workflows (e.g., environmental monitoring, method validations), retain the lot CoA and SDS. Align preparation with your SOPs and compendial methods as applicable.

Reaction and Applications

MEA is not a reagent for chemical synthesis; classical reaction families (e.g., Grignard, cross-coupling) do not apply. Instead, its relevance is in microbiology and mycology workflows.

• Microbiological applications (literature/general information)

  • Cultivation, isolation, and maintenance of yeasts and filamentous fungi from environmental, food, and industrial samples.
  • Enumeration of fungal bioburden and total yeast/mold counts when used as a plate medium.
  • Morphological characterization and sporulation support for many molds.
  • Quality control of industrial fermentations involving brewing/baking yeasts where malt-derived nutrients are beneficial.

• Practical tips (general)

  • Prepare under aseptic conditions; sterilize after reconstitution according to your SOPs. Excessive heat exposure can caramelize sugars and diminish performance.
  • Adjustments such as antibiotics or acid supplements may be used in selective protocols to further suppress bacteria; verify compatibility with your organisms and SOPs.
  • Plate pouring temperature should be controlled to avoid condensation and ensure uniform gelation (general practice).

Always align usage with your internal methods and any applicable standards (e.g., food, environmental, or industrial microbiology compendia).

Reaction Conditions

Classical reaction condition guidance (solvent, catalysts, yields) is not applicable to MEA. For microbiological use, preparation and incubation parameters (e.g., reconstitution volume, sterilization regime, incubation temperature) must follow your laboratory SOPs or relevant compendial methods. Specific preparation/incubation conditions are Not specified for this item; refer to CoA/Spec Sheet and SDS.

Safety and Handling

• GHS classification, Signal word, H-statements, Pictograms: Not specified for this item; refer to the product SDS for authoritative information.
• General hazards (literature/general guidance for dehydrated media):
  • Low acute hazard; avoid inhalation of dust. Fine particulates may cause mechanical irritation to eyes and respiratory tract.
  • Not known to be flammable as a gel; the dry powder can burn if strongly heated, as with other organic mixtures.
• PPE and safe handling
  • Wear lab coat, safety glasses, and appropriate gloves; use a dust mask/respirator if dust generation is likely.
  • Handle opening/dispensing in a clean area to minimize contamination of the medium.
• Incompatibilities (general)
  • Avoid strong oxidizers and strong acids/bases that could degrade carbohydrates/proteins.
  • Prevent moisture uptake; clumping can impair dispersion and medium performance.
• First-aid overview (general)
  • Inhalation: Move to fresh air; seek medical attention if irritation persists.
  • Eye contact: Rinse cautiously with water for several minutes; remove contact lenses if present; seek medical advice for persistent symptoms.
  • Skin contact: Wash with soap and water.
  • Ingestion: Rinse mouth; seek medical advice if unwell.
• Sterilization cautions
  • During autoclaving, do not overheat/overcook media; excessive sterilization can cause caramelization/Maillard reactions that darken the medium and reduce performance (literature guidance). Always defer to SDS and internal QA procedures.

Solvent Selection

This product is a dehydrated microbiological medium intended to be reconstituted with water; conventional solvent selection for chemical reactions is not applicable.

• Reconstitution medium (general guidance)

  • Use high-purity water (e.g., ASTM Type I or II, or equivalent deionized/distilled water) to minimize inhibitory ions and microbial contaminants (literature/general practice).
  • Avoid hard/alkaline water which can alter pH and gel strength.

• Polarity/miscibility

  • The blend is water-dispersible; organic solvents are not appropriate for preparing culture plates and can inhibit microbial growth.

• When to choose MEA vs alternatives (general)

  • MEA is favored for yeasts and molds due to its carbohydrate-rich malt extract and slightly acidic pH, which suppresses many bacteria relative to fungi.
  • Alternatives include Potato Dextrose Agar (PDA) and Sabouraud Dextrose Agar (SDA); selection depends on organism preference, recovery requirements, and compendial method (literature/general information).

Storage and Reconstitution

• Storage conditions (as provided): Room temperature. Protect from moisture and contamination by keeping the container tightly closed.
• Shipping: Normal.
• Reconstitution: Not specified for this item; refer to CoA/Spec Sheet.
• General guidance (not a specification)
  • Store in a cool, dry place away from direct sunlight to preserve performance of carbohydrates and agar.
  • After opening, minimize exposure to humid air; consider desiccant storage to prevent clumping.
  • Follow your SOPs for water quality, sterilization, and plate pouring. Avoid excessive heat exposure to limit caramelization or Maillard reactions.

For lot-specific preparation instructions, pH targets, and performance criteria, consult the CoA/Spec Sheet for SKU M1528519.

Structure and Identity

Malt Extract Agar Medium (MEA) is a dehydrated, complex microbiological growth medium used primarily for cultivation and enumeration of yeasts and filamentous fungi. It is a formulated blend rather than a single, defined chemical substance.

• Item-specific identifiers

  • SKU: M1528519
  • Product Name: Malt Extract Agar Medium (MEA)
  • Grade: BioReagent
  • CAS, CID, InChIKey, SMILES: Not applicable to complex media; not assigned.
  • Molecular formula / Molecular weight: Not applicable for a mixture; Not specified for this item; refer to CoA/Spec Sheet.

• Structural features (general description)

  • Complex mixture typically containing: malt extract (carbohydrate-rich hydrolysate), agar (polysaccharide gelling agent), and optionally peptone/yeast extract (nitrogen/vitamin sources) (literature/general information).
  • No single discrete 2D structure can represent the product; components include polysaccharides, oligosaccharides, amino acids/peptides, minerals, and trace growth factors.

• 2D representation in words

  • Agar: linear galactan polymer (agarose/agaropectin) forming a thermo-reversible gel matrix (literature).
  • Malt extract: heterogeneous mixture of maltose, glucose, dextrins, amino acids, and micronutrients derived from malted grain (literature).

Synthetic Utility

This product is not a chemical building block and has no defined role in synthetic organic, inorganic, or materials chemistry. It is a complex microbiological medium intended for cultivation of fungi and yeasts. For chemical synthesis needs, consult appropriate pure reagents and solvents.

Target Specificity

No immunological or molecular target specificity applies to this product. It is a general-purpose medium supporting a broad range of yeasts and molds. Tested strains, if any, are Not specified for this item; refer to CoA/Spec Sheet for any growth promotion testing information.