Pel-Freez Blog
Read more about the latest updates, how Pel-Freez products support research, and get helpful practical tips in our blog.
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Custom, Bulk and Made-to-Order Biological ReagentsCustom volumes, lot reservations, private labeling and bulk orders of serum, plasma, complement and tissue reagents, and how Pel-Freez fills them.
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Key Attributes of Plasma Products: Anticoagulant, Sterility and StorageA buyer's guide to research plasma: which anticoagulant to choose, when sterile filtration is worth it, and how frozen plasma should be stored and...
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Low-Endotoxin Gamma Globulins for Cell Culture and In Vivo WorkWhy endotoxin matters in gamma globulin reagents, how low-endotoxin IgG fractions are made and tested, and where they are needed in culture and in...
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Fresh vs Frozen Tissue: Preservation and Enzyme IntegrityWhen to order fresh versus snap-frozen animal tissue: enzyme activity, storage, ice-crystal damage and logistics, with rabbit tissue in both formats.
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Choosing a Host Species for Polyclonal and Monoclonal AntibodiesWhy host species matters for polyclonal and monoclonal antibodies: rabbit, goat, sheep, chicken and rodent hosts compared on affinity and cross-reactivity.
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Regulatory Documents for Biological Reagents: SDS, USDA Permits, Health CertificatesThe compliance paperwork behind animal-derived reagents: Safety Data Sheets, USDA APHIS import permits and veterinary health certificates.
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Choosing the Right Anticoagulant for Plasma: EDTA, Heparin, Sodium Citrate and ACDHow EDTA, heparin, sodium citrate and ACD work, which assays each anticoagulant suits, and how to match the anticoagulant to your downstream application.
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C1q and Factor-Depleted Human Serum: Dissecting the Complement PathwaysHow C1q-, C3-, Factor B- and other factor-depleted human sera isolate the classical and alternative complement pathways, with reconstitution tips.
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Albumin Purification Methods and Fractions ExplainedHeat-shock, cold-ethanol (Cohn Fraction V) and chromatographic albumin purification compared on purity, scale and cost, and which BSA fraction fits.
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Thromboplastin and Tissue Extracts in Coagulation and Functional AssaysHow rabbit brain thromboplastin and cephalin drive PT and aPTT reagents, and how thymus and pituitary extracts are used in functional assays.
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Antibodies in IHC, Western Blot and ELISA: Applications and TipsHow antibodies are used in immunohistochemistry, Western blotting and ELISA, with practical selection and optimization tips for reproducible results.
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Certificates of Analysis for Biological Reagents: What They CoverWhat a Certificate of Analysis contains for a biological reagent, why it matters for QA and compliance, and how to find lot-specific Pel-Freez CoAs.
