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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Storage, Shelf Life and Freeze-Thaw Handling of Biological ReagentsRecommended storage temperatures, how expiry dates are set from stability data, and how to thaw and aliquot serum, plasma and complement safely.
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Sterility, Endotoxin and Quality Testing of Biological ReagentsHow biological reagents are made sterile and proven so, how endotoxin is measured by LAL, and the quality-system controls behind every released lot.
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Key Attributes of Whole Blood and Red Blood Cells (RBCs)Composition, handling and storage of research whole blood, the properties of red blood cells, and anticoagulant choices for rabbit, bovine and pig blood.
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Species Selection and Animal Sourcing for Biological ReagentsHow species choice and animal sourcing (strain, age, husbandry, welfare) shape the quality and consistency of serum, plasma, complement and tissues.
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Single-Donor vs Pooled Human Serum: Consistency and TraceabilityWhen to choose single-donor human serum (traceability, donor studies) versus pooled serum (lot-to-lot consistency), including reserved-unit lots.
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Cold Chain Shipping for Biological Reagents: Dry Ice and International LogisticsHow frozen serum, plasma and complement travel safely: dry ice, insulated packaging, labeling, documentation and temperature monitoring worldwide.
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Heat-Inactivated Serum: What It Is and When to Use ItHow heating serum to 56°C for 30 minutes inactivates complement, where heat-inactivated goat, rabbit, pig and human serum are used, and how to handle...
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IgG Purification Methods: Protein A/G Affinity vs Ammonium SulfateProtein A and Protein G affinity chromatography compared with ammonium sulfate precipitation for IgG purification: purity, yield, species and cost.
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Research Grade vs Clinical/GMP Grade Reagents: Choosing the Right OneHow research-use-only and GMP-grade biological reagents differ in oversight, documentation and cost, and how to choose the grade your project needs.
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Delipidized Serum: Benefits and Applications in ResearchWhy lipid-reduced serum cuts turbidity and assay interference, where delipidized goat, bovine and horse serum are used, and how to select and handle it.
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Gamma Globulins and Antisera: Key Attributes and UsesWhat gamma globulin (IgG) fractions and antisera are, how they are purified and formulated, and how they are used in diagnostics and immunoassays.
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Antibody Basics: Host, Target and Isotype ExplainedThe three attributes that define a research antibody, host species, target and isotype, and how to use them to pick the right antibody for...
