Steven C Howell

4 Questions 8 Answers 0 Followers

Questions related from Steven C Howell

When calculating a dihedral angle, how is the direction defined? What are the most common convention?

I understand the geometry and calculation of a dihedral angle. It is not clear how the direction is defined. On the wiki page for dihedral angles, it states that, "the dihedral angle \phi is the...

10 October 2015 6,556 1 View

Does scattering intensity (SAXS/WAXS/SANS/XRD/LS) have the SI units of intensity W/m^2?

Does scattering intensity (SAXS/WAXS/SANS/XRD/LS) have the SI units of intensity W/m^2? I saw a publication which reported a quantity in units of [(I(Q)-1)^2]/I(Q) which would only make sense if...

10 October 2015 1,457 7 View

Where can I learn about the mathematics supporting and used in performing a zero concentration extrapolation on SAXS/WAXS data?

I am interested to better understand the mathematics supporting and used in performing a zero concentration extrapolation on small-angle and wide-angle x-ray/neutron scattering. Can anyone...

05 May 2015 3,855 4 View

How do I calculate the partial specific volume of a DNA-protein complex?

I believe this is a fairly straightforward calculation but simply something I am not yet familiar with. I have a solution of a DNA-protein complex (about 50/50 DNA/protein by weight). I need to...

08 August 2013 2,720 1 View