labware
Graduated cylinders and their tolerance
Why two people disagree on a graduated cylinder, how meniscus and tilt create the error, and when the job belongs in a flask.
8 October 2026 · 7 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
cold chainbiosafetycrisprspecificationsequencingproteomicsenquiryglossarytroubleshootingcloningmicrobiologybuffersfreezerspipettingcalibrationelisacell cultureglassware
520 articles
liquid handling
Gravimetric checks with a balance
Turn a balance reading into a delivered volume with the water temperature you measured, and see what a water check can support.
8 October 2026 · 7 min read
microbiology
Growth curves and when to induce
Why induction of a lac-type promoter belongs in exponential growth, and why an OD600 reading is turbidity rather than a cell count.
8 October 2026 · 10 min read
genome editing
Guide RNA design is a hypothesis
A guide RNA is a hypothesis about spacer, PAM and score. This page says what those numbers can rank, and what only the edited alleles can prove.
8 October 2026 · 10 min read
buffers and water
Hard feed water and a purification skid
Treat calcium, magnesium, chlorine, and chloramine as feed-water facts, then match pretreatment to the skid maker before you trust product water.
8 October 2026 · 8 min read
microbiology
Heat shock and electroporation concepts
How to separate a failed heat shock from a failed electroporation when a cloning-strain transformation returns an empty plate.
8 October 2026 · 9 min read
protein biochemistry
His-tags and why a band is not pure protein
A His-tag elution can look like one band and still be a mixture. IMAC is a capture step, and a second method is what supports a purity claim.
8 October 2026 · 6 min read
genome editing
Homology-directed repair versus end joining
End joining, microhomology repair and homology-directed repair compete after a cut. Cell cycle and donor presence decide which outcome is plausible.
8 October 2026 · 8 min read
immunoassays
Hook effect and dilute-to-check
Why a very high analyte can make a sandwich ELISA look low, and how a planned dilution series separates a hook effect from a truly low sample.
8 October 2026 · 10 min read
cold chain
Hot climates and the last mile of a reagent shipment
The last mile is the handoff from depot to bench: a hot vehicle and a delayed receiver. Name the shipper, the coolant, and who reads the logger.
8 October 2026 · 9 min read
pcr amplification
Hot-start polymerases and primer-dimers
How a heat-released hot-start block limits extension during setup, and how a short no-template product on a gel is read as primer-dimer.
8 October 2026 · 9 min read
laboratory safety
Housekeeping is a safety control
Clear benches, labelled vessels, closed waste, and a dry floor are one control. Watch them applied during a single afternoon bench reset.
8 October 2026 · 8 min read