From: Peter Schuck <ps@analyticalultracentrifugation.com>
  To  : rasmb@alpha.bbri.org
  Date: Thu, 13 Sep 2001 18:18:48 -0700

new website for sedfit and direct boundary modeling

Dear RASMBers, 

this is to announce a new internet resource for sedimentation velocity
analytical ultracentrifugation at

http://www.AnalyticalUltracentrifugation.com/

It has an online reference manual for the use of sedfit
(http://www.analyticalultracentrifugation.com/sedfit_help.htm) with a
step-by-step tutorial
(http://www.analyticalultracentrifugation.com/tutorial_sizedistributions.htm
), some tips for getting started, an example, etc.  

Also, it is a resource for additional information on direct boundary
sedimentation velocity with introductory texts and background information
on Solving the Lamm equation, size-distribution analysis, systematic noise
analysis, and other topics.
(http://www.analyticalultracentrifugation.com/tutorials.htm)

There is a NEW VERSION of SEDFIT (8), which can be downloaded at 
http://www.analyticalultracentrifugation.com/download.htm
or from the RASMB site.  There are some new models and several changes and
bug fixes that make the new version faster and more convenient to use. 

Sedfit is a software tool for the analysis of sedimentation velocity data,
with main features:
* direct fitting of sedimentation data by Lamm equation solutions with 
* up to four non-interacting species,
* rapid self-association models, and non-ideal concentration dependent
sedimentation
* continuous Lamm equation distributions c(s) and c(M) with maximum entropy
regularization 
* apparent sedimentation coefficient distribution ls-g*(s)
* van Holde-Weischet analyses
* systematic noise decomposition
An example is shown at
http://www.analyticalultracentrifugation.com/sedfit_example.htm

Please let me know if you experience any problems in accessing this website.

Regards,
Peter Schuck