Difference between revisions of "Table of symbols"

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Line 50: Line 50:
 
|-
 
|-
 
|s20W
 
|s20W
−
|
+
|s-20-w, sedimentation coefficient corrected to 20 degrees C in pure water (but not corrected for solute concentration)
−
|
+
|sec
 
|-
 
|-
−
|
+
|s°
−
|
+
|s-zero; sedimentation coefficient corrected to zero solute concentration
−
|
+
|sec
 
|-
 
|-
−
|
+
|s°20w
−
|
+
|s-zero-20-w; sedimentation coefficient corrected to 20 degrees C in pure water and also corrected for solute concentration
−
|
+
|sec
 
|-
 
|-
−
|
+
|smax
−
|
+
|The maximum sedimentation coefficient assuming that the sample is an anhydrous sphere
−
|
+
|sec
 
|-
 
|-
−
|
+
|f
−
|
+
|Frictional coefficient (may inherit subscripts etc. from s)
−
|
+
|g (sec)^(-1)
 +
|-
 +
|k
 +
|An empirical constant that takes into account the effect of sample concentration on s
 +
|l/g
 +
|-
 +
|σ
 +
|sigma, reduced apparent molecular weight
 +
|cm^(-2)
 +
|-
 +
|JD
 +
|flux due to diffusion
 +
|g (cm^(-2)) (sec^(-1))
 +
|-
 +
|D
 +
|diffusion coefficient
 +
|cm^(-2) sec^(-1)
 +
|-
 +
|D0
 +
|Maximum diffusion coefficient assuming the protein is an anhydrous sphere
 +
|cm^(-2) sec^(-1)
 +
|-
 +
|Js
 +
|Flux due to sedimentation
 +
|g cm^(-2) sec^(-1)
 +
|-
 +
|R
 +
|Gas constant 8.3144*10^7 in cgs
 +
|g mole^(-1) °K ^(-1)
 +
|-
 +
|N0
 +
|Avogadros number 6.023*10^23
 +
|mole^(-1)
 +
|-
 +
|N
 +
|Number of residues
 +
|unitless
 +
|-
 +
|c
 +
|weight or mass concentration
 +
|g/l
 +
|-
 +
|c(r)
 +
|function of concentration at radial position r
 +
|g/l
 +
|-
 +
|C
 +
|Molar concentration
 +
|mole/liter
 +
|-
 +
|ω
 +
|Radial velocity (usually of centrifuge rotor)
 +
|sec^(-1)
 +
|-
 +
|Mr
 +
|Molecular weight
 +
|g mole^(-1)
 +
|-
 +
|Mp
 +
|Molecular weight of a protein in a complex
 +
|g mole^(-1)
 +
|-
 +
|Md
 +
|Molecular weight of a denaturant in a complex
 +
|g mole^(-1)
 +
|-
 +
|ρ
 +
|density (usually of buffer)
 +
|g/ml
 +
|-
 +
|vbar
 +
|partial specific volume
 +
|ml/g
 +
|-
 +
|η
 +
|viscosity
 +
|poise
 +
|-
 +
|R0
 +
|Radius of anhydrous sphere computed from molecular weight and vbar
 +
|cm
 +
|-
 +
|Rp
 +
|Radius of anhydrous sphere computed from molecular weight and Perrins empirical formula
 +
|cm
 +
|-
 +
|Rs
 +
|Stokes radius
 +
|cm
 +
|-
 +
|a/b
 +
|ratio of axial lengths in a model of an asymmetrical oblate or prolate
 +
|unitless
 +
|-
 +
|δ1
 +
|degree of hydration
 +
|unitless
 
|-
 
|-
 
|}
 
|}

Revision as of 13:40, 9 August 2011

Symbol Description Units
g grams g
l liters l
ml mililiters ml
poise units of viscosity poise
°C degrees Celsius °C
°K degrees Kelvin temperature °K
T temperature °C or °K
m meters m
cm centimeters cm
s Sedimentation Coefficient sec
s* s star, apparent sedimentation coefficient sec
s20W s-20-w, sedimentation coefficient corrected to 20 degrees C in pure water (but not corrected for solute concentration) sec
s° s-zero; sedimentation coefficient corrected to zero solute concentration sec
s°20w s-zero-20-w; sedimentation coefficient corrected to 20 degrees C in pure water and also corrected for solute concentration sec
smax The maximum sedimentation coefficient assuming that the sample is an anhydrous sphere sec
f Frictional coefficient (may inherit subscripts etc. from s) g (sec)^(-1)
k An empirical constant that takes into account the effect of sample concentration on s l/g
σ sigma, reduced apparent molecular weight cm^(-2)
JD flux due to diffusion g (cm^(-2)) (sec^(-1))
D diffusion coefficient cm^(-2) sec^(-1)
D0 Maximum diffusion coefficient assuming the protein is an anhydrous sphere cm^(-2) sec^(-1)
Js Flux due to sedimentation g cm^(-2) sec^(-1)
R Gas constant 8.3144*10^7 in cgs g mole^(-1) °K ^(-1)
N0 Avogadros number 6.023*10^23 mole^(-1)
N Number of residues unitless
c weight or mass concentration g/l
c(r) function of concentration at radial position r g/l
C Molar concentration mole/liter
ω Radial velocity (usually of centrifuge rotor) sec^(-1)
Mr Molecular weight g mole^(-1)
Mp Molecular weight of a protein in a complex g mole^(-1)
Md Molecular weight of a denaturant in a complex g mole^(-1)
ρ density (usually of buffer) g/ml
vbar partial specific volume ml/g
η viscosity poise
R0 Radius of anhydrous sphere computed from molecular weight and vbar cm
Rp Radius of anhydrous sphere computed from molecular weight and Perrins empirical formula cm
Rs Stokes radius cm
a/b ratio of axial lengths in a model of an asymmetrical oblate or prolate unitless
δ1 degree of hydration unitless
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