Hajna Medium - BioReagent

Cat. No.: H1528336

GRADE & PURITY BioReagent

Storage

Room temperature

Shipped In

Normal

Overview

For isolation and cultivation of Yersinia pestis

Specifications

Specifications & Purity

BioReagent

Storage

Room temperature

Shipped In

Normal

Grade

BioReagent

Product Line

biological_products

Application Protocols

Validated, lot-specific application protocols are not specified for this item; refer to the CoA/Spec Sheet and SDS. The following are general laboratory practices for dehydrated culture media (literature/general): • Reconstitution: Weigh the required amount of medium per your method; add to purified water with stirring. Heat gently until fully dissolved. • Sterilization: Autoclave according to your SOP if heat-stable. For media containing heat-labile components, sterilize base medium first, then aseptically add sterile-filtered supplements after cooling. • Agar plates: If applicable, cool molten agar medium to ~45–50 °C before pouring plates in a sterile environment. Allow to solidify and dry before use. • Storage of prepared media: Store in the dark at 2–8 °C unless otherwise validated; monitor for contamination, dehydration, or color changes before use. • Performance check: Conduct growth-promotion tests with appropriate reference strains relevant to your application. All parameters such as grams per liter, pH targets, and sterilization times are not specified for this item and must be obtained from the product CoA/Spec Sheet or your validated SOP.

Biological Roles

• Functional role (literature/general): Culture media provide macro- and micronutrients (amino nitrogen, carbohydrates, minerals), buffering capacity, and—in selective variants—agents that inhibit competing flora. “Hajna” formulations in the literature are associated with specific enrichment or differential purposes; verify the exact intended use on the product Spec Sheet. • Microbiological context: The medium’s nutrient balance, ionic strength, and pH define growth rates and selectivity. Peptones/tryptones supply peptides and amino acids; salts maintain osmotic balance; carbon sources fuel metabolism; buffers moderate pH drift caused by microbial respiration and fermentation. • Indicators and differentials (if present; not specified here): Dyes, bile salts, or hydrolysis substrates can differentiate metabolic activities via color change or precipitation (literature/general). The presence/absence of such agents must be confirmed on the CoA. • Research utility: Supports cultivation for phenotype assays, enumeration, strain maintenance, and challenge studies under controlled lab conditions. Not for human or veterinary clinical use. • Performance verification: Growth-promotion and inhibitory performance should be checked using appropriate ATCC/DSM strains relevant to your workflow, aligned with compendial or in-house methods (literature/general).

Buffer Applications

Classical buffer system design (e.g., preparing defined pH buffer solutions for biochemical assays) is not the primary application for Hajna Medium. However, culture media typically incorporate buffering capacity (e.g., phosphate, carbonate, or organic components) to maintain pH during microbial growth (literature/general). • Practical notes:

• Do not substitute the medium for an analytical buffer in enzyme kinetics or spectroscopy unless your method specifically validates it.
• If pH control is critical, measure and document the pH of the prepared medium at 25 °C per your SOP. Adjustments should only be made if allowed by the method and after confirming they do not alter selectivity or growth performance. • For dedicated buffer needs: Use defined buffering agents (e.g., phosphate, HEPES, Tris) prepared to target pH and ionic strength per standard formulations. Reserve the culture medium for microbiological cultivation tasks.

Green Alternatives

Green chemistry substitution is not directly applicable to a culture medium, but sustainability and waste minimization can be addressed operationally (literature/general): • Water and energy usage:

• Optimize batch sizes to match demand, reducing autoclave cycles and media waste.
• Use validated autoclave programs to avoid over-processing. • Packaging and disposables:
• Prepare media in reusable glassware when possible; minimize single-use plastics by employing sterilizable flasks and bottles.
• If using agar plates, consider on-demand pouring to reduce expired plate waste. • Sterilization approach:
• Prefer steam sterilization over chemical sterilants to reduce solvent/disinfectant waste, where compatible. • Disposal:
• Autoclave spent media and cultures before disposal; segregate biohazard waste for appropriate treatment. Neutralize dyes or inhibitors if local regulations require (consult EHS). • Sourcing:
• Consolidate orders to reduce shipment frequency and associated carbon footprint. Select lot sizes that minimize waste due to expiry. These operational choices function as “green alternatives” in the context of microbiological media use; there are no direct chemical substitute solvents or reagents for a complex medium.

Pharmaceutical Uses

This product is intended for research and laboratory use only. It is not produced under GMP and is not intended for clinical diagnostics or therapeutic applications. • Potential roles in pharmaceutical R&D and QC (literature/general):

• Microbial limits testing, environmental monitoring, and method development within research labs (not for compendial release testing unless validated internally).
• Strain cultivation for upstream process development or exploratory studies. • Pharmacopeial status: Not specified for this item; refer to CoA/Spec Sheet. If compendial equivalency is required (e.g., USP/EP media), verify compliance via documentation and growth-promotion testing. • Excipients/clinical formulations: Not applicable. Culture media are not excipients and are not used in finished dosage forms.

Physical Properties

• Appearance: Not specified for this item; refer to CoA/Spec Sheet. • Solubility in water: Media components are intended to dissolve/disperse in purified water to prepare working solutions (literature/general). Complete dissolution may require gentle heating and stirring. • pH (prepared medium): Not specified for this item; refer to CoA/Spec Sheet. Typical microbiological media exhibit a defined pH at 25 °C when prepared per label (literature/general). • Osmolality/ionic strength: Not specified for this item; refer to CoA/Spec Sheet. • Melting/boiling point, density, refractive index, logP: Not applicable to a complex dehydrated blend; not specified for this item. • Color/clarity (prepared): Not specified for this item; refer to CoA/Spec Sheet. Many media yield a clear to slightly opalescent solution/gel depending on agar content (literature/general). • Typical packaging form: Dehydrated powder intended for reconstitution (literature/general). Verify lot-specific details and any supplemental components on the label. Note: All quantitative specifications for this catalog item are not specified here; consult the lot-specific Certificate of Analysis and Product Specification Sheet for authoritative values and preparation parameters.

Quality & Grades

• Item grade: BioReagent. • What BioReagent typically implies (literature/general): Suitable for biological and microbiological research applications. Manufactured with attention to bioburden and contaminant control appropriate for lab use, but not necessarily to clinical diagnostic or GMP pharmaceutical standards. • UV/LC impurities, metal limits, and other item-specific analytical specs: Not specified for this item; refer to CoA/Spec Sheet. • Lot-to-lot control: For media, critical attributes include pH of prepared medium, growth promotion/inhibition performance, sterility post-sterilization, and appearance. Verification of these attributes is typically reported per lot (literature/general). Check the CoA for growth promotion test organisms, if provided. • Stabilizers/preservatives: Not specified for this item; refer to CoA/Spec Sheet. • Practical guidance: Validate the medium in your specific workflow (organism panel, incubation conditions, antibiotic or supplement additions). Record lot numbers in microbiological QC to ensure traceability.

Reaction & Applications

As a microbiological culture medium, Hajna Medium is not used as a reagent in synthetic organic reactions. Instead, it serves as a nutrient and/or selective base for cultivating microorganisms. • Research applications (literature/general):

• Preparation of sterile plates or broths for cultivation, enrichment, or selective isolation of bacteria, depending on the specific Hajna formulation.
• Microbial QC testing, environmental monitoring, food/water testing, and academic research workflows where defined growth conditions are required.
• Method development and validation of growth/inhibition performance using reference strains. • Practical tips:
• Confirm the exact formulation and target organism selectivity for this catalog item on the CoA/Spec Sheet before use; the name “Hajna Medium” encompasses multiple historical formulations in the literature.
• Prepare with high-purity water; dissolve completely prior to sterilization. If the medium contains heat-labile supplements, add them aseptically after cooling to 45–50 °C (agar media) or room temperature (broths), per your SOP.
• Perform growth-promotion testing with appropriate control strains to qualify each lot for your application. • Non-applicability to chemical synthesis: No role in common named reactions or reagent-based transformations.

Reaction Conditions

Chemical reaction parameters (solvent, temperature, catalysts) are not applicable. For microbiological use, relevant preparation and incubation conditions include (literature/general): • Medium preparation: Dissolve the dehydrated medium in purified water with stirring; heat gently to aid dissolution. Bring to final volume accurately. • Sterilization: Autoclave per your SOP if the formulation is heat-stable. Typical lab practice is moist heat sterilization; consult the Spec Sheet for cycle parameters. Add heat-labile supplements aseptically after cooling. • Incubation: Temperature, atmosphere (aerobic/anaerobic), and duration depend on the target organism and method. Follow compendial or in-house protocols. • Quality controls: Perform growth-promotion/inhibition tests using relevant reference strains to confirm lot suitability and preparation correctness. Note: No quantitative incubation or sterilization values are specified for this item; refer to CoA/Spec Sheet and your validated SOPs.

Safety & Handling

• GHS classification, signal word, hazard statements, pictograms: Not specified for this item; refer to the product SDS for authoritative hazard communication. • General hazards (literature/general): Dehydrated culture media may cause mechanical irritation to eyes, skin, and respiratory tract as dust. Some formulations contain selective agents (e.g., bile salts, dyes, inhibitors) that can be irritating or harmful if swallowed or inhaled. • PPE: Use laboratory coat, appropriate gloves (e.g., nitrile), safety glasses/goggles. Employ local exhaust or dust control when handling powders. • Handling practices: Avoid generating dust. Weigh within a balance enclosure if possible. Clean spills with damp methods to minimize aerosolization. Do not ingest or inhale. Wash thoroughly after handling. • Incompatibilities (literature/general): Strong oxidizers or acids/bases may be incompatible with certain organic components; store away from reactive chemicals. Do not mix with disinfectants/biocides intended to be excluded from culture media. • Microbiological risk: Once reconstituted and inoculated, cultures may contain pathogenic organisms depending on use. Follow BSL practices appropriate to the organism. Autoclave all waste and used media before disposal. • First aid (overview): If eye or skin contact occurs, rinse with water for several minutes; remove contaminated clothing. If inhaled, move to fresh air. If ingested, rinse mouth. Seek medical attention as needed. Always defer to SDS.

Solvent Selection

This product is a dehydrated culture medium that is reconstituted in purified water; conventional organic solvent selection is not applicable. • Primary solvent: High-purity water (e.g., ASTM Type I/II or equivalent) for dissolution and preparation (literature/general). • Reconstitution notes (literature/general):

• Add powder gradually to cold or room-temperature water with stirring to avoid clumping.
• Gentle heating can aid dissolution; avoid boiling unless instructed by the specification.
• Adjust final volume precisely after dissolution; check pH only if the method calls for it. • Sterilization: Autoclave as directed by your method if heat-stable; filter-sterilize only if recommended and formulation is filterable. Follow the product Spec Sheet for mode and time/temperature. • Compatibility: Do not mix with alcohols or disinfectants; such agents can inhibit microbial recovery. Supplements (e.g., antibiotics, carbohydrates, indicators) should be added aseptically post-sterilization as required by your protocol (literature/general).

Storage & Reconstitution

• Storage conditions (as provided): Room temperature. Protect from moisture and excessive humidity. Keep container tightly closed. • Shipping: Shipped at ambient temperature (Normal), as provided. • Reconstitution guidance (literature/general):

• Use freshly prepared, high-purity water. Add powder gradually with stirring; heat gently to achieve complete dissolution.
• Adjust final volume accurately. If pH adjustment is part of your SOP, verify pH at 25 °C. Do not modify pH unless validated for your method.
• Sterilize by autoclaving if the formulation is heat-stable; add heat-labile components aseptically after cooling. • Storage of prepared medium (general): For broths and agar, store in the dark at 2–8 °C and use within the validated shelf-life for your lab. Avoid repeated melting/solidifying beyond validated cycles to preserve performance. • Freeze–thaw: Not applicable to dehydrated powder. Avoid freezing prepared agar unless procedure specifically allows and has been validated. • Item-specific concentrations, pH, and cycle parameters: Not specified for this item; refer to CoA/Spec Sheet. • Research Use Note: For research use only.

Structure & Identity

• Item type: Complex, multi-component microbiological culture medium (mixture), sold as “Hajna Medium.” This is not a single defined chemical structure. • Molecular formula: Not specified for this item; refer to CoA/Spec Sheet. • Molecular weight: Not specified for this item; refer to CoA/Spec Sheet. • SMILES / InChI / InChIKey: Not applicable to complex media; not specified for this item. • Structural features: As a dehydrated medium, the product typically comprises a blend of inorganic salts, peptones/tryptones, carbohydrates, buffers, and selective agents (literature/general). Exact composition for this catalog item is not specified; consult the product CoA/specification. • 2D structure description: Not applicable—mixture containing multiple organic and inorganic constituents rather than a single molecule with a defined connectivity. • Synonymy and historical note (literature/general): “Hajna” designations in microbiology commonly trace to formulations developed by W. Hajna and colleagues; specific scope (e.g., general nutrient base vs. selective/enrichment variants) depends on the exact recipe. Users should verify intended organism selectivity and supplement requirements from the accompanying specification before use.

Synthetic Utility

Synthetic organic or inorganic transformations are not applicable to this product. Hajna Medium functions as a nutrient/selective base for microbiological cultivation rather than as a chemical reagent. • If your workflow involves metabolites or biotransformations (literature/general): The medium composition can influence metabolic profiles of cultured organisms. Any biocatalysis study should control for medium composition and validate that the chosen medium supports the desired enzymatic pathways without introducing confounding inhibitors or indicators. • For chemical synthesis needs: Select appropriate pure reagents and solvents; this medium is not designed to participate in or facilitate named reactions, catalysis, or stoichiometric transformations.

Target Specificity

Target specificity details (e.g., organism selectivity, differential reactions, indicator responses) are not specified for this item; refer to the CoA/Spec Sheet. Literature/general note: “Hajna” media described historically may be selective/differential for particular microbial groups depending on the included inhibitors, carbon sources, and indicators. Do not assume selectivity without verifying the exact formulation provided for this catalog number.