What is Debye Waller temperature factor?
The Debye–Waller factor (DWF), named after Peter Debye and Ivar Waller, is used in condensed matter physics to describe the attenuation of x-ray scattering or coherent neutron scattering caused by thermal motion. It has also been called the B factor or the temperature factor.
What does the B factor or Debye-Waller factor tell us about a crystal structure?
The term B-factor, sometimes called the Debye-Waller factor, temperature factor, or atomic displacement parameter, is used in protein crystallography to describe the attenuation of X-ray or neutron scattering caused by thermal motion.
What is temperature factor?
The temperature factor indicates how much an atom oscillates or vibrates around the position specified in the model. In other words, it’s a measure of the thermal motion of individual atoms in the crystal.
How is B-factor calculated?
For example: The temperature of the md simulation was set at 298K. The B-factor at 298 K was calculated from RMSF by the formula: B = 8*Pi*Pi*(RMSF)**2/3 .
What is a good B-factor?
In the 3 to 5 angstrom resolution range, isotropic atomic B-factors can be 100, 200 or greater. At higher resolution, B-factors from 20-100 are reasonable.
What is overall B factor?
The xrefin optimize overall statement optimizes overall isotropic or anisotropic B-factors by employing a conjugate gradient minimization using (Eq. 12.1) as the target. For the isotropic case, the variable is simply the overall B-factor B, and in Eq.
What are the 7 factors that affect temperature?
Factors that Affecting Controlling Temperature Control
- The latitude of the place.
- The altitude of the place.
- Distance from the sea.
- The air- mass circulation.
- The presence of warm and cold ocean currents.
- Local aspects.
What is a B factor?
The term B-factor, sometimes called the Debye–Waller factor, temperature factor, or atomic displacement parameter, is used in protein crystallography to describe the attenuation of X-ray or neutron scattering caused by thermal motion.