From owner-metabolic-reg@net.bio.net Tue Jan 14 22:00:00 1997
Path: biosci!daresbury!not-for-mail
From: "Stefan Schuster" <stefan=schuster@rz.hu-berlin.de>
Newsgroups: bionet.metabolic-reg
Subject: re: logarithmic definitions
Date: 15 Jan 1997 15:41:58 -0000
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Sender: lpddist@mserv1.dl.ac.uk
Distribution: bionet
Message-ID: <5bits6$s7t@mserv1.dl.ac.uk>
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Original-To: <btk-mca@dl.ac.uk>

In line with David Fell's comment on logarithmic derivatives, I'd like to 
stress that these derivatives are invariant to the choice of units. When we 
write x = value times unit, we have, due to the rules of computation with 
logarithms: 
d log x = d log value plus d log unit.
d means in fact a difference, so d log unit is:
log unit - log unit = 0. So the unit does not matter.
I hope I have not increased the confusion.

Greetings

Stefan Schuster (Berlin) 

.