Kratky plot - Revision history

KevinYager at 13:58, 25 July 2015

2015-07-25T13:58:07Z

KevinYager at 13:48, 25 July 2015

2015-07-25T13:48:34Z

KevinYager at 13:47, 25 July 2015

2015-07-25T13:47:34Z

KevinYager: /* See Also */

2015-01-14T16:30:03Z

‎See Also

KevinYager: Created page with "A '''Kratky plot''' is obtained by plotting scattering intensity as $\scriptstyle I(q) \times q^2$ vs. $\scriptstyle q$ (ins..."

2015-01-14T16:21:29Z

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..."

New page

A '''Kratky plot''' is obtained by plotting [[scattering]] [[scattering intensity|intensity]] as <math>\scriptstyle I(q) \times q^2</math> vs. <math>\scriptstyle q</math> (instead of simply <math>\scriptstyle I(q) </math> vs. <math>\scriptstyle q</math>). This representation divides-out the decay of the scattering, making certain other [[scattering features|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.

==See Also==
* [[Guinier plot]]
* [[Zimm plot]]
* [[Example:Polymer clustering]]
* [http://en.wikipedia.org/wiki/Static_light_scattering#Kratky_plot Wikipedia:Kratky plot]
* [http://www.bioisis.net/tutorial/6 bioisis.net:Kratky Analysis

@@ Line 6: / Line 6: @@
 * Other conformations can also potentially be distinguished:
 ** Pseudo-linear rise for [[Rod-like scaling|rod-like]] conformation
-** High-q upturn from the plateau indicates worm-like chain
+** High-''[[q]]'' upturn from the plateau indicates worm-like chain
 ** In polymer gels, a peak may indicate the presence of inhomogeneities, such as [[Example:Polymer clustering|clustering]].
 ** etc.

@@ Line 9: / Line 9: @@
 ** In polymer gels, a peak may indicate the presence of inhomogeneities, such as [[Example:Polymer clustering|clustering]].
 ** etc.
 ==See Also==

@@ Line 1: / Line 1: @@
 A '''Kratky plot''' is obtained by plotting [[scattering]] [[scattering intensity|intensity]] as <math>\scriptstyle I(q) \times q^2</math> vs. <math>\scriptstyle q</math> (instead of simply <math>\scriptstyle I(q) </math> vs. <math>\scriptstyle q</math>). This representation divides-out the decay of the scattering, making certain other [[scattering features|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.
+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:
 ==See Also==