Difference between revisions of "Kratky plot"
KevinYager (talk | contribs) (Created page with "A '''Kratky plot''' is obtained by plotting scattering intensity as <math>\scriptstyle I(q) \times q^2</math> vs. <math>\scriptstyle q</math> (ins...") |
KevinYager (talk | contribs) (→See Also) |
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* [[Guinier plot]] | * [[Guinier plot]] | ||
* [[Zimm plot]] | * [[Zimm plot]] | ||
| + | * [[Fresnel plot]] | ||
* [[Example:Polymer clustering]] | * [[Example:Polymer clustering]] | ||
* [http://en.wikipedia.org/wiki/Static_light_scattering#Kratky_plot Wikipedia:Kratky plot] | * [http://en.wikipedia.org/wiki/Static_light_scattering#Kratky_plot Wikipedia:Kratky plot] | ||
| − | * [http://www.bioisis.net/tutorial/6 bioisis.net:Kratky Analysis | + | * [http://www.bioisis.net/tutorial/6 bioisis.net:Kratky Analysis] |
Revision as of 12:30, 14 January 2015
A Kratky plot is obtained by plotting scattering intensity as vs. (instead of simply vs. ). This representation divides-out the decay of the scattering, making certain other features more evident.
In particular, a Kratky analysis is often performed on polymer solutions. Here, the shape of the curve in the Kratky plot helps identify the conformation of the polymer chain: a rise to a plateau indicates an unfolded chain (random coil), whereas a distinct peak is indicative of a compact or folded conformation for the chain (in biological studies, this may be a protein in a well-defined/folded state). Other conformations can also potentially be distinguished (pseudo-linear rise for rod-like conformation, high-q upturn from the plateau indicates worm-like chain, etc.). In polymer gels, a peak may indicate the presence of inhomogeneities, such as clustering.
