Potato Dextrose Semi-Solid Agar - BioReagent

Cat. No.: P1528296

QUALITÉ & PURETÉ BioReagent

Storage

Room temperature

Shipped In

Normal

Vue d’ensemble

For testing of Pseudomonas cocovenenans subsp. farinofermentans

Spécifications

Spécifications et pureté

BioReagent

Conditions de stockage de stockage

Room temperature

Expédié en

Normal

Grade

BioReagent

Product Line

Produits biologiques

Application Protocols

No manufacturer-verified protocols are provided in the Product Data for this SKU. The following are literature-based, general-use examples and must be validated by the user. They are not product specifications.

• Plate preparation (general):
  1. Suspend the dehydrated medium in purified water; heat to dissolve. 2) Autoclave (121 °C, ~15 min). 3) Cool to 45–50 °C and pour sterile plates. 4) Allow to solidify and dry surface before use.
• Semi-solid stab tubes: Dispense hot medium into tubes, cap loosely for sterilization, then tighten caps after cooling vertically to form a uniform semi-solid column.
• Inoculation: Streak plates for isolation or insert a sterile needle vertically for stabs. For diffusion assays, place sterile discs/plugs on the surface after inoculation.
• Incubation: 20–30 °C is common for molds/yeasts, but confirm for each organism. Monitor for 24–120 h or longer depending on growth rate (literature ranges).
• Quality control (suggested): Include positive-control strains known to grow on PD-based media and negative controls (uninoculated plates) to verify sterility.
• Documentation: Record lot number, preparation date, autoclave cycle, cooling/pouring temperature, and observed pH/gel firmness for reproducibility.

Item-specific recommended volumes, masses, and incubation parameters are Not specified for this item; refer to CoA/Spec Sheet.

Biological Roles

This product functions as a nutrient medium for cultivating fungi and yeasts. Biological roles of its principal components (literature, general):

• Dextrose (D-glucose): A readily metabolizable carbon and energy source entering glycolysis and subsequent central metabolic pathways (e.g., TCA cycle, fermentation pathways), enabling rapid ATP generation and biosynthesis.
• Potato-derived nutrients: Provide complex nitrogen, vitamins (e.g., B-complex traces), minerals, and other growth factors that support diverse fungal/yeast taxa, often enhancing sporulation and pigment expression compared with minimalist media.
• Agar (reduced level for semi-solid): A non-nutritive polysaccharide that sets into a gel upon cooling, creating a hydrated matrix. At semi-solid concentrations, it permits limited organism mobility/diffusion while maintaining spatial structure for gradient formation (oxygen, metabolites, inhibitors).

Functional context in microbiology (literature):

• Supports growth promotion testing (GPT) with representative organisms when validated.
• Facilitates studies of morphogenesis (e.g., hyphal vs. yeast forms), sporulation, and secondary metabolite production.
• Enables controlled antagonism/interaction assays (e.g., fungal-fungal or fungal-bacterial co-culture) by modulating diffusion in the semi-solid matrix.

Note: Exact component levels, performance criteria (e.g., pH post-autoclave, gel strength), and any selectives are Not specified for this item; refer to CoA/Spec Sheet. Users should conduct method suitability tests for their organisms and endpoints of interest.

Buffer Applications

This product is a nutrient medium, not a defined buffering system. It does not serve as a conventional buffer with a specified pKa/pH operating range.

• Applicability: Not typically used as a buffer. If pH control is critical, adjust the medium with sterile acid/base after sterilization (as validated), or employ a dedicated buffer system compatible with fungal/yeast growth (literature, general guidance).
• For pH-sensitive studies, consider buffered media variants (e.g., addition of citrate, phosphate, or MES buffers) validated to not inhibit growth of the target organisms (literature).

Item-specific pH targets and buffering capacity are Not specified for this item; refer to CoA/Spec Sheet.

Green Alternatives

While “green alternatives” are typically framed for organic solvents/reagents, sustainability considerations also apply to culture media workflows.

• Media choice and resource use (literature, general):
  • Semi-solid media can reduce plate count and plastic consumption by enabling motility/diffusion assays in tubes or a smaller number of plates.
  • Prepare only the quantity required to limit autoclave energy cycles and minimize waste of water and disposables.
• Comparative perspective (literature):
  • Potato Dextrose (PD)-based media vs. Sabouraud Dextrose Agar (SDA): PD media are often used for molds/yeasts; SDA is also common. Selection should prioritize method suitability to avoid rework and waste. Both are water-based and autoclavable, with similar environmental footprints.
  • Ready-to-use plates vs. in-house preparation: Ready plates can reduce energy/water use on-site but increase shipping mass/packaging. In-house prep can be greener if batched efficiently and local waste heat is recovered.
• Process improvements:
  • Use energy-optimized sterilization (validated shorter autoclave cycles where permitted).
  • Employ reusable glassware where compatible with biosafety requirements.
  • Neutralize and autoclave spent media before disposal to protect wastewater systems.

This SKU’s specific formulation details and any eco-certifications are Not specified for this item; refer to CoA/Spec Sheet. Choose the medium that passes method suitability first—this reduces repeat work and total footprint.

Pharmaceutical Uses

No therapeutic claims are made. This product is for research use only. In pharmaceutical and industrial microbiology contexts, potato dextrose-based media are used in laboratory workflows rather than as drug substances.

• Typical roles (literature, general):
  • Microbial quality control and environmental monitoring: Cultivation and enumeration of yeasts and molds from surfaces, air samplers, or process waters when the method specifies PD-based media.
  • Method suitability/validation: Assessment of recovery efficiency for target organisms in product testing, as appropriate to the method.
  • Strain maintenance: Semi-solid stabs/slants for short-term storage/transport of reference or production strains.
• Compendial status: Specific pharmacopeial endorsements/formulations (USP/EP/JP) for PDA-type media vary by chapter and test; verify against the applicable method. This SKU’s compendial alignment is Not specified for this item; refer to CoA/Spec Sheet and your quality system.
• Formulation/excipient role: Not applicable; this is a culture medium, not an excipient.

Users operating under GMP should qualify lots via incoming inspection and GPT, using water quality and sterilization procedures aligned with their validated methods.

Physical Properties

For a formulated culture medium mixture, single-compound physical constants are not applicable. Where helpful, typical literature characteristics for potato dextrose agar (PDA)-type media are provided strictly as general background and not as product specifications.

• Appearance: Not specified for this item; refer to CoA/Spec Sheet.
• pH (prepared medium, at 25 °C): PDA commonly targets ~5.6 (literature, post-sterilization); semi-solid variants generally follow the same pH unless otherwise formulated (literature). Not specified for this item; refer to CoA/Spec Sheet.
• Gelling behavior: Semi-solid consistency is achieved by lowering agar concentration compared with standard solid media (literature). Exact agar content for this item is Not specified; refer to CoA/Spec Sheet.
• Solubility: Dehydrated medium is water-soluble/dispersible upon heating; agar dissolves at near-boiling temperatures and gels on cooling (literature).
• Density, refractive index, logP, bp/mp: Not applicable to a complex, aqueous gel system; not specified for this item.
• Typical preparation range (literature, non-spec):
  • Working concentration is commonly expressed as grams of dehydrated medium per liter of purified water; gel strength tuned by agar content. Semi-solid media often employ ~0.3–0.5% agar (w/v) to allow limited diffusion/motility (literature guidance).
• Sterilization compatibility: Autoclavable at 121 °C (15 psi) for typical media unless stated otherwise (literature). For this specific item, process parameters are Not specified; refer to CoA/Spec Sheet.

Always verify lot-specific targets (e.g., pH, gel strength, sterility) on the CoA/spec sheet for this SKU.

Quality and Grades

• Grade: BioReagent (as provided in Product Data). This denotes suitability for biological research workflows, emphasizing consistent performance in culture applications. It does not imply clinical/diagnostic use.
• Manufacturing intent: Formulated for research use only (per Research Use Note). Not for human or animal therapeutic/diagnostic applications.
• What BioReagent typically signifies (general context):
  • Controlled sourcing and blending of components to support microbial growth performance.
  • Batch-level quality checks such as appearance, solubility/clarity on preparation, and may include growth promotion testing (GPT) with representative fungi/yeasts (literature expectation for media quality), though the exact tests for this SKU are Not specified for this item; refer to CoA/Spec Sheet.
  • Possible characterization of pH after sterilization and gel strength for semi-solid performance (literature), but item-specific targets are Not specified; refer to CoA/Spec Sheet.
• Stabilizers/antimicrobials: None are implied for growth media; any selectives or antibiotics would be explicitly stated. For this product, such additives are Not specified for this item; refer to CoA/Spec Sheet.
• Documentation: For lot-specific data (e.g., GPT organisms, pH range, moisture content), consult the Certificate of Analysis/Specification Sheet accompanying the SKU.

Practical guidance: Validate performance under your lab’s conditions (water quality, autoclave cycle, vessel geometry). Record pH and gel firmness post-sterilization/cooling to benchmark between lots.

Reaction and Applications

Chemical reaction content is not typically applicable to culture media. Instead, the emphasis is on microbiology/mycology applications. Key use cases (literature, general) for potato dextrose semi-solid agar include:

• Fungal and yeast cultivation: The dextrose-rich and potato-derived nutrient environment supports a broad range of filamentous fungi and yeasts, enabling growth promotion testing, strain maintenance, and routine culture.
• Semi-solid utilities:
  • Motility and diffusion studies: Reduced agar concentration permits limited migration, useful for assessing hyphal extension or yeast spreading under controlled conditions.
  • Overlay/plug assays: Embedding test materials (e.g., discs, plugs) to examine diffusion-dependent interactions (pigment diffusion, metabolite halos) while minimizing surface spreading.
  • Microaerophilic niches and gradient formation: Semi-solid matrices foster oxygen and nutrient gradients conducive to specific physiological investigations.
• Enumeration and quality control: Environmental monitoring and count assays for molds/yeasts in research and industrial settings (method suitability required; literature).
• Strain preservation/transport: Semi-solid stabs/slants can maintain viability over short-to-medium terms due to reduced dehydration and migration (literature).

Practical tips (literature):

• Prepare with high-purity water; dissolve completely by heating. Autoclave appropriately. Cool to ~45–50 °C before pouring to minimize condensation and prevent component degradation.
• Avoid overheating to limit Maillard reactions and caramelization that may alter medium performance.
• Validate growth with representative strains (e.g., common lab yeasts/fungi) under your lab’s conditions.

No chemical reaction applications are recommended for this product.

Reaction Conditions

Classical reaction conditions are not applicable. For laboratory preparation and use (literature, general guidance, not product spec):

• Reconstitution solvent: Purified water.
• Dissolution: Suspend the dehydrated medium in water; apply heat with stirring to fully dissolve agar (near boiling).
• Sterilization: Autoclave at 121 °C for ~15 minutes (15 psi). Over-sterilization can darken the medium and may reduce growth performance.
• Cooling and pouring: Cool to ~45–50 °C before pouring plates or dispensing into tubes for semi-solid stabs to minimize condensation and ensure uniform gelation.
• Working format (semi-solid): Target agar in the ~0.3–0.5% w/v range for diffusion/motility assays; exact concentration depends on organism and assay design (literature). For this SKU, the specific agar content is Not specified; refer to CoA/Spec Sheet.
• Incubation: Follow organism-specific temperature and atmospheric requirements. Typical fungal culture temperatures range 20–30 °C, but validate per strain and method (literature).
• Expected outcomes: Robust growth of many fungi/yeasts with limited surface spread, enabling observation of colony morphology, radial growth rates, and metabolite diffusion patterns (literature).

Always confirm compatibility with your organisms and adhere to institutional biosafety protocols. For this SKU, any validated preparation recipe and performance metrics are Not specified for this item; refer to CoA/Spec Sheet.

Safety and Handling

This is a research-use microbiological medium. Formal GHS classification for this specific item is not provided here; consult the SDS for authoritative information.

• GHS classification, signal word, H-statements, pictograms: Not specified for this item; refer to SDS.
• Primary hazards (general, literature):
  • Dehydrated media can form nuisance dust; avoid inhalation. Handle in a clean environment to prevent contamination.
  • Hot media pose thermal burn risks during preparation and pouring; use heat-resistant gloves and eye/face protection.
  • After inoculation, cultures should be treated as biohazardous; follow institutional biosafety procedures for containment and disposal (autoclave before discarding).
• PPE recommendations (general good practice): Lab coat, gloves, safety glasses; use dust mask/respirator if handling large quantities of powder that may aerosolize, as per risk assessment.
• Incompatibilities: Strong oxidizers and reactive chemicals are generally incompatible with organic media components. Avoid contact with microbial decontaminants (e.g., bleach) until disposal/neutralization steps are intended.
• First aid overview (general):
  • Inhalation of dust: move to fresh air; seek medical attention if irritation persists.
  • Skin/eye contact (powder or hot liquid): rinse with water; for burns, cool with water and seek medical care.
  • Ingestion: rinse mouth; seek medical attention.
• Spill response: For dry spills, avoid dust generation; clean with damp disposable towels. For liquid media, absorb with inert material; disinfect, then dispose per biosafety rules.

Always defer to the SDS and your institution’s EHS policies.

Solvent Selection

This product is intended to be prepared in water; organic solvents are not applicable.

• Primary solvent: Purified/deionized water. For reproducible results, use ASTM Type I or II water or microbiology-grade water free of inhibitory contaminants (literature best practice).
• Miscibility: Fully miscible upon heating; agar requires near-boiling temperatures to dissolve. The solution will gel on cooling due to agar.
• Water quality considerations:
  • Avoid residual disinfectants (chlorine/chloramine) and high ionic strength that may alter gelling or microbial growth.
  • Filtered, recently produced water minimizes bioburden prior to sterilization.
• When to choose semi-solid vs solid/liquid media (literature):
  • Semi-solid: motility/diffusion studies, overlay techniques, maintenance of microaerophiles/slow growers by limited oxygen/gradient formation, and fungal enumeration where spreading is controlled.
  • Solid (higher agar): colony isolation and differential counting on plates.
  • Broth (no agar): rapid biomass accumulation and enrichment.

Simple comparison (literature, general):

• Semi-solid PDA: supports growth with limited spread; useful for motility/diffusion tests.
• Solid PDA: firmer surface for colony morphology and isolation.
• Potato Dextrose Broth: no gelling; suited to biomass production and biochemical assays.

For this SKU, any specific preparation concentration in water is Not specified; refer to CoA/Spec Sheet.

Storage and Reconstitution

• Storage conditions (as provided): Room temperature. Keep container tightly closed in a dry place to prevent moisture uptake and clumping. Protect from light and contaminants. Shipped under normal conditions per Product Data.
• Shelf life: Not specified for this item; refer to CoA/Spec Sheet.
• Reconstitution (literature, general guidance; not product spec):
  • Water: Use purified/microbiology-grade water.
  • Dissolution: Add the appropriate mass of medium to water with stirring; heat to near boiling until completely dissolved.
  • Sterilization: Autoclave at 121 °C for ~15 min unless your validated method specifies otherwise.
  • Post-sterilization: Cool to ~45–50 °C before pouring plates or dispensing into tubes for semi-solid applications. Avoid overheating to minimize caramelization.
• Freeze–thaw: Not applicable to the dehydrated product. Avoid freezing prepared plates unless explicitly validated, as freeze–thaw can compromise gel integrity and performance.
• Opened-container handling: Minimize exposure to ambient humidity; consider desiccant storage. Reseal promptly after use.
• Compatibility: Use borosilicate glass or validated autoclavable plastics for preparation. Do not use containers that leach inhibitors.

Any item-specific reconstitution ratio (g/L), target pH, and performance criteria are Not specified for this item; refer to the product’s CoA/Spec Sheet.

Research Use Only: As stated by the manufacturer, for research use only.

Structure and Identity

This product is a prepared culture medium blend designed for microbiology/mycology workflows rather than a single defined molecule.

• Product type: Microbiological culture medium (semi-solid formulation) based on potato dextrose with agar as the gelling component.
• Composition nature: Mixture/complex (potato infusion or its equivalent nutrient base + dextrose + reduced-level agar for semi-solid consistency). Exact component amounts and origin are manufacturing details.
• Molecular formula: Not applicable to mixtures. Not specified for this item; refer to CoA/Spec Sheet.
• Molecular weight: Not applicable to mixtures. Not specified for this item; refer to CoA/Spec Sheet.
• CAS, InChIKey, SMILES: Not applicable for a multi-component medium.
• Structural features (described qualitatively):
  • Carbohydrate carbon source: dextrose (D-glucose) supports robust fungal/yeast growth (literature, general composition).
  • Complex nutrients: potato-derived components supply vitamins, amino acids, and growth factors (literature, general composition).
  • Gelling agent: agar (a sulfated galactan) at reduced concentration to produce a semi-solid matrix that permits limited diffusion/motility assessments (literature).
• Physical form: Typically supplied as a homogeneous dehydrated blend or prepared medium specific to the catalog listing; exact appearance is Not specified for this item; refer to CoA/Spec Sheet.

Note: Because this is a formulated medium, discrete molecular identifiers (SMILES/InChIKey) and a single molecular formula are not applicable. Users should consult the product CoA/specification for any lot-specific composition or performance parameters (e.g., sterility, pH targets, growth promotion test organisms).

Synthetic Utility

This is not a chemical building block or reagent for synthetic chemistry. Therefore, classical synthetic utility (functional group transformations, named reactions, cross-couplings, etc.) does not apply.

• Practical note: If culturing is part of a biotransformation or fermentation workflow that feeds into downstream synthetic steps, semi-solid potato dextrose agar can support isolation, screening, or maintenance of microbial biocatalysts prior to liquid-phase biocatalysis (literature, general practice).

For chemical synthesis purposes, refer instead to dedicated reagents/solvents. No reaction-oriented specifications apply to this medium.

Target Specificity

Not an antibody, probe, or inhibitor—there is no molecular “target specificity” in the pharmacological sense.

• Intended biological scope (literature, general): Broad support for a range of filamentous fungi and yeasts owing to rich carbon and complex nutrient content.
• Any claims of selectivity (e.g., antibiotics, pH modifiers, inhibitors) would be explicitly listed for a selective medium; none are provided here. For this SKU, selective agents or targeted organisms are Not specified for this item; refer to CoA/Spec Sheet.

For targeted detection or differential growth, use a validated selective/differential medium as appropriate.