cold chain
Backup freezers and who holds the key
A backup is a named person, a route for the boxes, and a temperature check on arrival. A locked spare freezer is only a second appliance.
8 October 2026 · 8 min read
Knowledge centre
Methods a laboratory can check.
Guides, method explainers and sourcing notes for research laboratories. Written by the EVRINTH Editorial Team from published methods, with catalogue links for enquiry rather than stock claims.
All topicsBuffers and laboratory water26Cell culture26Chromatography26Cold chain and sample storage26Cytometry and microscopy26DNA sequencing26Gels and blotting26Gene expression26Genome editing26Immunoassays26Laboratory labware26Laboratory safety26Liquid handling26Microbiology26Molecular cloning26Nucleic acid purification26PCR and amplification26Protein biochemistry26Proteomics26Research sourcing and study design26
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520 articles
Pillar · microbiology
Bacterial culture and transformation
How non-pathogenic E. coli cloning strains are grown and how plasmid DNA is introduced, with the controls that make a colony meaningful.
8 October 2026 · 10 min read
gene expression
Batch effects in an expression study
What a batch effect is in an expression study, how library date, operator, sequencer or kit lot can dominate a PCA, and what a correction model can adjust.
8 October 2026 · 8 min read
labware
Beakers are for handling not for accuracy
Why a beaker graduation is only a handling guide, and when a concentration other people will reuse belongs in a volumetric flask.
8 October 2026 · 7 min read
research sourcing
Bioinformatics analysis as a separate line
Treat alignment, quantification, and statistics as their own line, and name the reference, the contrasts, and the file types before reads are produced.
8 October 2026 · 9 min read
gene expression
Biological versus technical replicates
How to tell a biological replicate from a technical one, and which unit of inference actually supports a treatment claim in an expression study.
8 October 2026 · 8 min read
Pillar · laboratory safety
Biosafety basics for research benches
Research-bench biosafety is a stack of barriers chosen by a risk assessment. This page explains the stack. It does not approve the work.
8 October 2026 · 10 min read
laboratory safety
Biosafety cabinets are not fume hoods
Choose a Class II cabinet, a chemical fume hood, or a laminar clean bench by what each airflow protects. HEPA filtration does not capture vapours.
8 October 2026 · 9 min read
microbiology
Biosafety for non-pathogenic cloning work
Disabled K-12 cloning strains are still living bacteria. This page lists practices that match low-risk plasmid work and leaves the containment level to the institution.
8 October 2026 · 8 min read
cell culture
Biosafety level is an institutional decision
BSL-1 and BSL-2 as educational descriptions only: the containment assignment for a line or sample is made by the institution, and a supplier cannot make it.
8 October 2026 · 8 min read
laboratory safety
Biosafety levels are not a slogan
Biosafety levels name a bundle of practices, equipment, and facilities. They are not a slogan, and this page will not assign one to your organism.
8 October 2026 · 9 min read
cytometry and microscopy
Biosafety of unfixed human samples
Why unfixed human blood, tissue and cells on a cytometer or microscope stay an institutional biosafety decision, not a technique choice.
8 October 2026 · 6 min read