Modified Martin Agar Medium - BioReagent

Cat. No.: M1528279

GRADE & PURITY BioReagent

Storage

Room temperature

Shipped In

Normal

Descripción general

For fungal sterility testing of pharmaceuticals

Specifications

Especificaciones y pureza

BioReagent

Condiciones de almacenamiento de almacenamiento

Room temperature

Enviado en

Normal

Grado

BioReagent

Product Line

Productos biológicos

Application Protocols

No item-specific validated protocols are provided in the Product Data; refer to the product label/CoA for definitive instructions.

General protocol (literature/general) for preparing agar plates

1. Weigh dehydrated medium per supplier instructions (commonly 35–60 g/L; not specified for this item).
2. Add to cold purified water with stirring; heat to dissolve fully.
3. Autoclave at 121 °C for 15 min. Allow to cool to 45–50 °C.
4. If required by formulation, aseptically add sterile-filtered selective agents (e.g., antibiotics, dyes) at recommended concentrations.
5. Pour 20–25 mL per 90 mm Petri dish in a biosafety cabinet. Let solidify and dry until the surface is matte.
6. Plate samples using streak, spread, or pour plate methods. Incubate inverted at organism-appropriate temperature (often 25–30 °C for molds) and monitor for 2–7 days.

Quality control checks (general)

• Growth promotion/inhibition: Plate control strains to verify expected recovery of target fungi and suppression of bacteria.
• Sterility: Incubate an uninoculated plate to confirm absence of contamination.

Note: Parameters above are general guidance only and are not item-specific specifications.

Biological Roles

Item-specific facts

• None specified beyond product identity as a selective microbiological medium for research use.

Literature/general perspective

• Functional role: Provides a nutrient matrix and solid support enabling the cultivation and isolation of fungi and yeasts while inhibiting competing bacteria via acidic pH and/or selective agents typical of Modified Martin formulations.
• Nutritional components: Complex nitrogen sources (peptones/yeast extract) supply amino acids, peptides, vitamins; carbohydrates (e.g., dextrose) supply fermentable carbon; mineral salts support osmotic balance and enzyme cofactor needs (literature).
• Selectivity mechanisms: Dyes such as rose bengal can restrict colony size and, together with antibiotics (e.g., streptomycin), suppress bacterial growth, improving fungal recovery from mixed samples (literature). Specific additives for this SKU are Not specified for this item; refer to CoA/Spec Sheet.
• Use cases: Environmental mycology (soil, air, surfaces), food/mycotoxin investigations, and general fungal biodiversity assessments in research labs. No clinical diagnostic claims are made; For research use only.

Performance considerations (general)

• Different fungal taxa exhibit variable sensitivity to dyes/antibiotics; parallel plating on a non-selective medium is recommended to avoid false negatives.

Buffer Applications

Not a dedicated buffer system.

• While prepared media possess inherent buffering capacity (often via phosphates) to maintain a target pH favorable to fungi, Modified Martin Agar Medium is not typically used as a stand-alone buffer in biochemical assays. For pH control in cell-free systems, select defined buffers (e.g., phosphate, citrate) tailored to your assay. See Reaction Conditions for general preparation notes.

Green Alternatives

Context

• Environmental impact for microbiological media largely stems from energy and water use (autoclaving, dishwashing), single-use plastics, and sourcing of peptones/agar.

Greener practice options (general)

• Energy and water reduction: Load autoclaves efficiently; use validated minimum cycles (e.g., 121 °C, 15 min at 15 psi for media—literature) rather than default longer runs. Dry glassware at ambient when possible.
• Material choices: Consider reusable glass Petri dishes where biosafety permits; adopt plate recyclers or media refill systems. Use plant-based peptones and sustainably sourced agar when available.
• Waste minimization: Prepare only the volume needed; keep small aliquots of dehydrated medium to limit moisture exposure and spoilage. Segregate biological waste for optimized decontamination.

Comparison snapshot (general)

• Modified Martin Agar vs. non-selective media (e.g., Sabouraud Dextrose Agar): MMA reduces bacterial overgrowth, decreasing repeat plating and resource use for fungal isolation. Tradeoff: Selective agents may introduce additional hazard/waste handling considerations.
• In-house prepared agar vs. ready-to-use plates: In-house prep reduces transport emissions and packaging waste; ready-to-use minimizes autoclave energy/water but may increase single-use plastic. Choose based on facility capabilities.

Pharmaceutical Uses

No therapeutic or clinical diagnostic use is claimed or supported for this product.

General manufacturing/research context

• In pharmaceutical and industrial microbiology research labs, selective fungal media like Modified Martin Agar are used for environmental monitoring studies, bioburden investigations, and raw material screening for fungal contaminants (research/non-GMP unless validated).
• As a complex medium, it is not an excipient nor an API. It may be incorporated into facility-specific monitoring programs following internal SOPs. Any use in regulated environments would require qualification of lots and validation of performance characteristics.

Compliance notes

• Pharmacopeial monographs typically exist for certain media (e.g., SDA, TSA), but Modified Martin formulations vary; consult internal methods or standards bodies if a harmonized method is required. For this SKU, composition and compliance status are Not specified for this item; refer to CoA/Spec Sheet.

Physical Properties

Item-specific facts (from Product Data)

• Physical state/appearance: Not specified for this item; refer to CoA/Spec Sheet.
• Molecular formula, molecular weight: Not applicable to complex media mixtures; not specified for this item.

Literature/general values for typical Modified Martin/rose bengal–based agar media components

• Gelling behavior (agar): Gelation typically occurs around 32–40 °C; melting point of agar gels is ~85–95 °C; the solidified gel is stable at common incubation temperatures (20–37 °C). These are literature characteristics of agar, the gelling component, not item-specific specifications.
• Solubility: Dehydrated medium is water-soluble/dispersible; agar requires heating to near boiling for complete dissolution (literature).
• pH: Final medium pH at 25 °C after preparation is commonly in the slightly acidic range for fungal isolation media (e.g., ~5.5–6.0), but exact pH is formulation-dependent (literature). Not specified for this item; refer to CoA/Spec Sheet.
• Color (prepared plates): Typically pinkish to rose (if rose bengal present), but color depends on formulation (literature). Not specified for this item.
• Density, refractive index, logP, pKa, UV cutoff, metal content: Not applicable or not defined for complex media; not specified for this item; refer to CoA/Spec Sheet.

Practical notes

• Mix disperses in cold water but requires heating with stirring to achieve full clarity before sterilization (general).

Quality and Grades

Item-specific facts (from Product Data)

• Grade: BioReagent.

What BioReagent grade means (general guidance)

• BioReagent-grade products are intended for research and laboratory applications requiring consistent biological performance. For microbiological media, this emphasizes:
  • Consistent nutrient composition and inhibitory/selective performance across lots.
  • Low bioburden in dehydrated powder and defined performance criteria on growth/inhibition tests with reference strains (e.g., Candida spp., Aspergillus spp., E. coli) as applicable (literature/general).
  • Controlled moisture content and particle size for reproducible dissolution and plate uniformity.

Item-specific notes

• Composition and performance specifications (e.g., pH after reconstitution, growth promotion/inhibition results, presence/level of selective agents) are Not specified for this item; refer to CoA/Spec Sheet.
• Stabilizers/preservatives: Not specified for this item; refer to CoA/Spec Sheet.

Practical QA considerations (general)

• Verify lot Certificates of Analysis for pH range, preparation instructions, and performance testing details.
• Record autoclave cycles and water quality used; medium performance is sensitive to overheating, extended sterilization, and high ionic content in water.
• For regulated workflows, document lot-to-lot equivalency via side-by-side recovery/inhibition studies.

Reaction and Applications

Not a chemical reagent for synthetic transformations.

Research applications (literature/general)

• Selective isolation of fungi and yeasts from environmental, food, and clinical-like specimens by suppressing bacterial overgrowth (using formulation-specific selective agents typical of Modified Martin media).
• Enumeration of viable fungal colonies (CFU) from surfaces or materials following standard plating and incubation protocols.
• Morphological characterization of filamentous fungi under slightly acidic, dye-containing conditions that help limit colony spread and enhance contrast (if rose bengal present in the formulation).

Practical tips (general)

• Streak or spread appropriate dilutions onto freshly prepared, well-dried plates to minimize colony swarming and spreading.
• Incubate inverted plates to prevent condensation drip; common incubation conditions are 25–30 °C for molds and 30–35 °C for many yeasts, with timelines of 48 h to 7 days depending on organism (literature). Exact conditions should be validated for your isolates.
• When working with mixed populations, consider pairing with a non-selective recovery medium to assess selectivity effects and sample burden.

Reaction Conditions

Item-specific preparation parameters are Not specified for this item; refer to CoA/Spec Sheet.

General preparation guidance for agar-based fungal media (literature/general)

• Reconstitution: Typical working concentrations for selective fungal agars range ~35–60 g/L in purified water, depending on formulation and desired gel firmness. Add powder slowly to cold water with vigorous stirring to avoid clumping.
• Dissolution: Heat with stirring to near boiling until completely dissolved and clear. Avoid caramelization of sugars (do not boil excessively).
• Sterilization: Autoclave at 121 °C for 15 minutes at ~15 psi. Do not autoclave heat-labile supplements (e.g., antibiotics, some dyes); instead, cool base medium to 45–50 °C, then aseptically add sterile-filtered supplements.
• Pouring plates: Dispense ~20–25 mL per 90 mm plate under aseptic conditions. Allow to solidify; dry plates (e.g., 30–60 minutes at room temperature in a laminar flow hood) before use to prevent surface pooling.
• Incubation: For fungal isolation, incubate inverted plates typically at 25–30 °C; examine daily for up to 7 days. Adjust conditions to organism requirements.
• Water quality: Use Type II or better DI water. High hardness can alter gel strength and clarity.
• Storage of prepared plates: Often 2–8 °C, protected from light if dye-containing; use within 2–4 weeks. Exact shelf life depends on formulation and supplements (general).

Safety and Handling

Item-specific facts (from Product Data)

• GHS classification, pictograms, signal word, H-statements: Not specified for this item; refer to SDS.
• Storage conditions: Room temperature (store tightly closed, dry).
• Shipping: Normal.

General safety guidance (consult the product SDS for authoritative information)

• Expected hazards: Dehydrated culture media are generally considered low hazard but may cause mechanical/respiratory irritation as dust. Some modified Martin formulations include selective agents (e.g., antibiotics, dyes like rose bengal) that are hazardous; avoid ingestion, inhalation, or skin/eye contact (literature).
• PPE: Laboratory coat, safety glasses, disposable gloves; dust mask/respirator if dust generation cannot be controlled.
• Handling: Avoid creating dust; use in well-ventilated areas. Do not eat, drink, or smoke in lab. Wash hands after use.
• Incompatibilities: Strong oxidizers and strong acids/bases may degrade organic constituents. Moisture uptake leads to caking and performance changes; keep container tightly closed with desiccant as needed.
• Autoclaving precautions: When sterilizing media, do not tightly cap flasks; allow venting to prevent overpressure. Heat-labile supplements (e.g., antibiotics, some dyes) should be sterile-filtered and added aseptically after cooling to ~45–50 °C (literature). Overheating can degrade agar and sugars, darken the medium, and reduce performance.
• First aid overview: If inhaled—move to fresh air. Skin/eye contact—rinse with water for 15 minutes. If ingested—rinse mouth, seek medical advice. Provide SDS to medical personnel.

Solvent Selection

Not typically applicable.

• This product is a dehydrated microbiological medium designed to be reconstituted in purified water to form agar plates or broths. Organic solvent selection is not relevant. For practical guidance on water quality and reconstitution, see Reaction Conditions and Application Protocols.

Storage and Reconstitution

Item-specific facts (from Product Data)

• Storage conditions (dehydrated): Room temperature. Keep container tightly closed; protect from moisture.
• Shipping: Normal.

Item-specific reconstitution parameters: Not specified for this item; refer to CoA/Spec Sheet.

General guidance (literature/general)

• Shelf life: Dehydrated media typically remain stable for 2–3 years when kept dry and at ambient temperature; verify on label.
• Handling after opening: Minimize humidity exposure. Reseal promptly; store in a desiccator if possible. Avoid cross-contamination by using clean, dedicated scoops.
• Reconstitution: Prepare only the volume needed. For media containing heat-labile components, add these after autoclaving when the medium has cooled to 45–50 °C under aseptic conditions.
• Storage of prepared media: Plates often stored at 2–8 °C, protected from light if dye-containing; bring to room temperature before use to prevent condensation. Avoid repeated temperature cycling.
• Freeze–thaw: Not applicable to dehydrated media; do not freeze prepared agar plates unless protocol specifically validates performance post-thaw.

Research use note

• For research use only. Not for human or animal therapeutic or diagnostic use.

Structure and Identity

Item-specific facts (from Product Data)

• Product type: Complex, dehydrated microbiological medium (Modified Martin Agar Medium); mixture, not a single defined compound.
• CAS, CID, InChIKey, SMILES: Not applicable to complex media; not specified for this item; refer to CoA/Spec Sheet.
• Grade: BioReagent.

Literature/general description

• Modified Martin Agar (often abbreviated MMA) is a selective agar medium commonly used for isolation of environmental and food-borne fungi and yeasts. It is typically derived from Martin’s formulation (a rose bengal–dextrose–peptone base) with selective agents to suppress fast-growing bacteria and saprophytes (literature).
• Structural features: As a complex mixture, it contains macromolecular polysaccharide gelling agent (agar; largely agarose/agaropectin), peptones/yeast extract (protein hydrolysates), simple carbohydrates (e.g., dextrose), inorganic salts (phosphate, magnesium), and optionally dyes/antimicrobials (e.g., rose bengal, streptomycin) depending on the specific formulation (literature). There is no single 2D structure; instead, it is a composite of polymeric and small-molecule constituents.

Notes for identification in the lab

• Appearance: Not specified for this item; refer to CoA/Spec Sheet. Dehydrated media are typically free-flowing powders or granules (general).
• Functional identity is verified by microbiological performance testing (e.g., growth promotion/inhibition with defined test organisms) rather than spectroscopic identity (general).

Synthetic Utility

Not applicable as a reagent for chemical synthesis.

• Modified Martin Agar Medium is a complex biological medium used for microbial cultivation, not a building block, catalyst, or solvent. It does not serve as a substrate or reagent in organic synthesis. For practical use guidance, see Reaction Conditions and Application Protocols.

Target Specificity

Not applicable.

• This product is not an antibody or affinity reagent. There is no antigen/epitope specificity, clone, isotype, or species reactivity associated with a culture medium. Selectivity for organisms (fungi vs. bacteria) arises from medium composition, which is Not specified for this item; refer to CoA/Spec Sheet.