immunoassays
Lot changes and why a control sample matters
How a frozen control sample shows that an antibody or kit lot has shifted, and what to ask when you bridge an old lot to a new one.
8 October 2026 · 9 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
nucleic acid purification
Low yield troubleshooting for DNA preps
A low spectrophotometer reading can mean incomplete lysis, overload, excess elution volume, leftover ethanol, nuclease or input that was never there.
8 October 2026 · 7 min read
labware
Low-binding tubes and when the claim matters
When a low-binding tube is worth specifying for dilute protein or nucleic acid, and which recovery evidence to ask for first.
8 October 2026 · 7 min read
gene expression
Low-input RNA and amplification bias
When a low-input RNA method is the right class, and how extra amplification and missing UMIs distort the proportions you meant to measure.
8 October 2026 · 9 min read
nucleic acid purification
Lysing cells without shearing the target
Open cells with detergent or enzyme when the assay needs long DNA, and treat mechanical bead-beating as a shearing step a short PCR may still accept.
8 October 2026 · 10 min read
Pillar · cell culture
Mammalian cell culture for research labs
How research labs keep mammalian cell culture workable: medium, aseptic technique, confluence, passage records and contamination checks.
8 October 2026 · 8 min read
microbiology
Marking plates so a negative control stays negative
A negative-control plate that grows colonies means the label, the drug, or the DNA was wrong. Write the antibiotic and the date on the base so lids cannot swap the story.
8 October 2026 · 9 min read
cell culture
Media serum and what a bottle label is asking
How to read a culture-medium label: basal class, serum percentage, glutamine form, pyruvate, phenol red and the bicarbonate the incubator must match.
8 October 2026 · 10 min read
dna sequencing
Metagenomic sequencing overview
Plan shotgun sequencing of community DNA, including host contamination, rare taxa, and assembly versus read classification.
8 October 2026 · 11 min read
buffers and water
Microbial growth in a water polisher
Define biofilm, colony-forming units, endotoxin, endotoxin units, a point-of-use filter, and a dead leg so a clean resistivity reading is not mistaken for clean water.
8 October 2026 · 9 min read
cytometry and microscopy
Microscopy resolution is not magnification
Why numerical aperture and wavelength set resolution, and how empty magnification enlarges blur without separating detail.
8 October 2026 · 7 min read
molecular cloning
Miniprep yield and downstream sequencing
Decide whether a miniprep is clean enough to sequence or should be repeated, using copy number, culture volume, and carryover rather than a promised yield.
8 October 2026 · 7 min read