Component Manual for the Xray-Tracing Package McXtrace, version 3.8.6

12.18  The SAXSLiposomes McXtrace Component

A sample of polydisperse liposomes in solution (water).

Identification

Description

A component simulating the scattering from a box-shaped, thin solution (water) of liposomes described by a pentuple-shell model.

Example: SAXSLiposomes( xwidth = 0.01, yheight = 0.01, zdepth = 0.01, SampleToDetectorDistance = 0.48, DetectorRadius = 0.1 )

Input parameters

Parameters in boldface are required; the others are optional.

Name

Unit

Description

Default

Radius

Å

Average thickness of the liposomes.

800.0

Thickness

Å

Thickness of the bilayer.

38.89

SigmaRadius

Relative Gaussian deviation of the radius in the distribution of liposomes.

0.20

nRadius

Number of bins in Radius for polydisperse distribution.

100

VolumeOfHeadgroup

Å\(^{3}\)

Volume of one lipid headgroup - default is POPC.

319.0

VolumeOfCH2Tail

Å\(^{3}\)

Volume of the CH2-chains of one lipid - default is POPC.

818.8

VolumeOfCH3Tail

Å\(^{3}\)

Volume of the CH3-tails of one lipid - default is POPC.

108.6

ScatteringLengthOfHeadgroup

cm

Scattering length of one lipid headgroup - default is POPC.

4.62E-11

ScatteringLengthOfCH2Tail

cm

Scattering length of the CH2-chains of one lipid - default is POPC.

6.71E-11

ScatteringLengthOfCH3Tail

cm

Scattering length of the CH3-tails of one lipid - default is POPC.

5.08E-12

Concentration

mM

Concentration of sample.

0.01

AbsorptionCrosssection

1/m

Absorption cross section of the sample.

0.0

xwidth

m

Dimension of component in the x-direction.

yheight

m

Dimension of component in the y-direction.

zdepth

m

Dimension of component in the z-direction.

SampleToDetectorDistance

m

Distance from sample to detector (for focusing the scattered x-rays).

DetectorRadius

m

Radius of the detector (for focusing the scattered x-rays).

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