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On Thu, 4 Jan 2007, David J. Schuller wrote: > *** For details on how to be removed from this list visit the *** > *** CCP4 home page http://www.ccp4.ac.uk *** > > > On Wed, 2007-01-03 at 20:54 -0500, Knut Langsestmo wrote: > > > > I can still remember attending one of my first crystallography > > > seminars > > > and being shocked at the apparent confusion of the distinguished > > > speaker > > > (the late Paul Sigler, IIRC) who inadvertently referred to red as > > > negative and blue as positive. > > At least in the case of electric charge, the color convention is > entirely arbitrary. I still find it annoying that in most B-factor > ("thermal") plots, blue generally means cold and red means hot. This is > counter-physical. > > Cheers, Well, not quite counter-physical: take iron and heat it, it will turn orange-red. And ice has a blue hue. (sorry) So it all depends on the convention and the physical process one considers. Fred. -- Fred. Vellieux, esq. ================================= IBS J.-P. Ebel CEA CNRS UJF / LBM 41 rue Jules Horowitz 38027 Grenoble Cedex 01 France Tel: (+33) (0) 438789605 Fax: (+33) (0) 438785494 =================================
