nucleic acid purification
Plant DNA extraction and polyphenols
Plan plant DNA extraction around oxidising polyphenols and co-precipitating polysaccharides, from CTAB-class buffers to young leaf versus woody tissue.
8 October 2026 · 10 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
proteomics
Plasma and the dynamic range problem
Plasma and serum span many orders of magnitude in protein concentration. A plain digest mostly sees albumin and immunoglobulins, and depletion changes what remains.
8 October 2026 · 8 min read
Pillar · molecular cloning
Plasmid cloning from insert to colony
How an insert becomes a plasmid, a colony and a verified clone, and which checkpoint fails when the plate is empty or the insert is wrong.
8 October 2026 · 8 min read
microbiology
Plasmid stability in a liquid culture
What segregational stability means in liquid culture, and why a cloudy cloning-strain flask can still give you no plasmid.
8 October 2026 · 7 min read
labware
Plastic resins and solvent compatibility
A working map of polypropylene, polyethylene, polystyrene, polycarbonate, PET and PTFE, and why the solvent chart still decides.
8 October 2026 · 7 min read
labware
Plate colours clear white and black
How to trace a weak or noisy plate reading to well colour: clear for absorbance, white for luminescence, and black for fluorescence.
8 October 2026 · 7 min read
liquid handling
Plate maps so a robot and a person agree
Compare a human plate map with a robot deck map so well identity, A1 orientation, replicates, and controls stay the same.
8 October 2026 · 7 min read
immunoassays
Plate readers absorbance and fluorescence
Absorbance, fluorescence and luminescence are different reads. A wrong wavelength or a clear plate in a fluorescence assay looks like a failed ELISA.
8 October 2026 · 9 min read
labware
Polypropylene polyethylene and polystyrene
Where polypropylene, polyethylene and polystyrene belong in ordinary research work, and where a resin class stops being enough.
8 October 2026 · 7 min read
gels and blotting
Ponceau staining before antibody incubation
Stain a blot with Ponceau after transfer and before blocking to see lanes, bubbles and failed transfer. The dye washes off and does not name the antigen.
8 October 2026 · 7 min read
pcr amplification
Positive negative and no-template controls
Decide when a positive, a negative and a no-template control each earn a place, and when a clean blank still leaves sample lanes unread.
8 October 2026 · 7 min read
proteomics
Post-translational modifications need extra evidence
Why a variable modification explains a mass shift without proving biology: localisation, neutral loss, search-space cost and which shifts are often tube artefacts.
8 October 2026 · 7 min read