centrifugation
Let an agent explain centrifugation, relay principles, techniques, equipment and safety from laboratory science sources, describe the named density methods, and distinguish centrifugation from filtration, sedimentation under gravity, chromatography and industrial gas centrifuge enrichment, which is noted only at public reference level.
Research draft, second pass
A second pass drafted this model: the structure a model of this thing needs, and what is known about it in the world. The line under this one says how the second half was obtained - researched against sources, or recalled without web access, in which case nothing here was read anywhere and every claim is a lead to verify. Unreviewed either way.
written by Claude from model knowledge without web access - no source was read, every claim is a lead to verify
Researched by: Claude
Purpose and description
Let an agent explain centrifugation, relay principles, techniques, equipment and safety from laboratory science sources, describe the named density methods, and distinguish centrifugation from filtration, sedimentation under gravity, chromatography and industrial gas centrifuge enrichment, which is noted only at public reference level.
A separation process that uses the centrifugal force generated by spinning samples at high speed to separate components by size, shape, density or viscosity, used in laboratories, medicine, dairy, wastewater and industry, with techniques such as differential centrifugation, density gradient centrifugation and isopycnic or buoyant density centrifugation, in which particles settle where their density matches the gradient, famously used by Meselson and Stahl in 1958; ultracentrifuges were pioneered by Theodor Svedberg. Rotors must be balanced and biohazardous samples contained.
What it is for: Separating mixtures by density and size.
It can be explain principles; relay techniques and equipment; describe named methods; relay laboratory safety.
Distinguishing features
Centrifugal force
Density-based separation
Wide applications
Rotor safety
What it looks like
A centrifuge with a spinning rotor holding tubes, and separated layers after spinning.
Physical character
relative centrifugal force: RCF = 1.118 x 10^-5 x r x rpm2 formula - r in cm
Meselson-Stahl experiment: 1958 year - caesium chloride gradient
Svedberg Nobel Prize: 1926 year - Chemistry
How it is recognised
Separation by spinning
Isopycnic centrifugation, buoyant density centrifugation, density gradient centrifugation, differential centrifugation
Filtration uses membranes; gravity sedimentation is slower; chromatography separates by interaction; gas centrifuges enrich isotopes
Related models
is a kind of - in registry terms
uses -
includes -
is contrasted with -
In practice
Families and kinds
differential centrifugation
rate-zonal density gradient centrifugation
isopycnic centrifugation
analytical ultracentrifugation
industrial separators such as cream separators
Standards and regulation
Laboratory biosafety guidance such as WHO Laboratory Biosafety Manual
Equipment safety standards for centrifuges
Failure modes and hazards
Rotor failure from imbalance or fatigue
Aerosols from broken tubes
Using wrong speed settings
Also called
Where this came from
wikidata · CC0 1.0
Also registered as vr.tr.centrifugation
Drafted structure
Bundle to layer to finding to question, as the second pass will find it: 4 bundles · 8 layers · 8 findings · 16 questions.
Understand What centrifugation is.
Science.
Definition
Definition.
Definition
Definition.
- What is centrifugation, and how does it differ from filtration, sedimentation and chromatography? definition
- Is the question about lab work, medicine, industry or safety? boundary
Methods
Named methods.
Methods
Methods.
- How do density gradient, isopycnic and buoyant density centrifugation work? definition
- Which entry fits the specific method? action
Science Principles.
Science.
Force
RCF and sedimentation.
Force
Force.
- How are rpm and RCF related, and what is a sedimentation coefficient? measurement
- Which references are standard? provenance
History
History.
History
History.
- How did Svedberg and Meselson and Stahl use centrifugation? provenance
- Which sources are cited? provenance
Practice Practice and safety.
Regulation.
Safety
Safety.
Safety
Safety.
- How should rotors be balanced and biohazards contained? provenance
- Which entry fits biosafety? action
Medical
Clinical use.
Medical
Medical.
- How is centrifugation used to separate blood components? provenance
- Which entry fits blood plasma? action
Context Industry.
Context.
Dairy
Dairy.
Dairy
Dairy.
- How do cream separators work? provenance
- Which entry fits cream separator? action
Water
Wastewater.
Water
Water.
- How are decanter centrifuges used to dewater sludge? provenance
- Which entry fits sewage sludge treatment? action
What the second pass must settle
- Should the named density methods be separate entries?
- How should laboratory methods sources be linked?
- Should industrial centrifugation be a separate entry?