Talk:Centrifuge

message: Both light and heavy particles experience the same centrifugal acceleration and move out radically (towards the bottom of the tube).  If there were no friction, both would reach the bottom together (Galileo's famous feather and coin experiment).  However, because of the Stokes's friction, which depends on the size, larger and heavier particle moves faster.  This is useful in the lab for fractional or partial sedimentation where larger particles (e.g., cell organelles) are sedimented but small particles (e.g., proteins and nucleic acids) stay back in solution.
It is wrong to state that lighter or smaller particles will float up to the top.  They can float up only if the buoyancy effects cause the effective mass to be negative.  Ck.mitra (talk) 13:51, 5 January 2010 (UTC)
thread_title:  mistake in the description 

message: The name Antonin Prandl should be spelled Antonin Prandtl. Moreover, according to this source he merely adapted an already existing centrifuge used for sugar (crystal/syrup) separation. I don't know how reliable that source is, but I do believe that centrifuges had been in use since the end of the 1700s. See for instance the invention of the tumble dryer in 1799. 
Can anyone access this article (and read it, as it's in German)? It might give some more clues on the Prandtl story...
Lvzon (talk) 01:03, 15 September 2008 (UTC)
replies: text: There already exists an article on centrifugal force, and see Sedimentation for the explanation of the process in a centrifuge. Moreover, the fact that centrifugal force isn't a real force in the Newtonian sense is irrelevant here, as it's very real to the particles experiencing it... (or the goldfish, see below ;) Lvzon (talk) 01:03, 15 September 2008 (UTC)
thread_title:  History of the centrifuge 

message: It would be nice to include this piece of info. What are the uber-centribuge, who makes/made them, where were/are they used?
One link:
A special 750 Gs centrifuge able to handle test items weighing up to 250 pounds is believed to possess the highest such capability in the nation. 
http://www.ntscorp.com/services/service_detail.php?id=189
: I'm not sure what the fastest centrifuge is, but current ultracentrifuges can do 150,000 RPM and generate around 1,000,000 g. Lvzon (talk) 01:03, 15 September 2008 (UTC)
replies: text: RCF is the amount of centrifugal acceleration relative to the average gravitational acceleration of 9.81 m*s^-2. Lvzon (talk) 01:03, 15 September 2008 (UTC)

text: depends on how hard you centrifuge it :)  Jaeger5432 15:38, 18 August 2006 (UTC)
thread_title:  What is the highest acceleration of a centrifuge? 

message: Dairy cream separator used a centrefuge.. -- Librarianofages 04:27, 15 March 2007 (UTC)
thread_title:  uses 

message: I changed the spelling of "haemacrotic" since I don't think there is such a word; the writer probably meant "haematocrit" (related to packed cell volume for red blood cells). I also retained the "ae" usage but I seem to recall there was an international agreement to convert all medical terms involving "ae" and "oe" to just "e" (so heme not haem, fetus not foetus, etc). I could be wrong - it's been a few decades.
Some more images of the various types of lab centrifuge would be most helpful; I no longer work in an industry where I have ready access to different types of laboratory (medical) centrifuge, alas, or I would oblige.
HTH, AncientBrit (talk) 01:34, 8 July 2009 (UTC)
thread_title:  Haemacrotic -> Haematocrit 

message: I may be mistaken, but shouldn't the second formula (the one using N_RPM) also have g in the denominator? Otherwise RCF would have acceleration units.
anonymous  — Preceding unsigned comment added by 71.232.18.21 (talk) 02:27, 11 July 2011 (UTC)
thread_title:  RCF formula 

message: The centrifuge works using the sedimentation principle, where the centripetal acceleration causes denser substances to separate out along the radial direction (the bottom of the tube).  I can't make sense of "centripetal". By what force are the particles accelerated towards the axis? Shouldn't it be "centrifugal force"? --92.77.220.225 (talk) 04:51, 31 January 2015 (UTC)
thread_title:  What centripetal acceleration? 

message: Hello fellow Wikipedians,
I have just modified  on Centrifuge. Please take a moment to review my edit. If you have any questions, or need the bot to ignore the links, or the page altogether, please visit this simple FaQ for additional information. I made the following changes:
*Added archive https://web.archive.org/web/20131209161103/http://aquaticpath.umd.edu:80/nomogram.html to http://aquaticpath.umd.edu/nomogram.html
*Added archive https://web.archive.org/web/20080910165634/http://www.civil.ubc.ca/liquefaction/Publications/flow%20liq_Naesgaard%20et%20al%20version31.pdf to http://www.civil.ubc.ca/liquefaction/Publications/flow%20liq_Naesgaard%20et%20al%20version31.pdf
When you have finished reviewing my changes, please set the checked parameter below to true or failed to let others know (documentation at ).
Cheers.—InternetArchiveBot (Report bug) 13:03, 18 November 2016 (UTC)
thread_title:  External links modified