Numerical solutions of the Lamm equation. II. Equilibrium sedimentation

Biopolymers ◽  
1966 ◽  
Vol 4 (4) ◽  
pp. 457-468 ◽  
Author(s):  
Menachem Dishon ◽  
George H. Weiss ◽  
David A. Yphantis
Keyword(s):  
Numerical Solutions ◽  
Equilibrium Sedimentation ◽  
Lamm Equation

Numerical solutions of the Lamm equation. IV. Rotor slowing experiments

Biopolymers ◽  
1967 ◽  
Vol 5 (10) ◽  
pp. 1021-1028 ◽  
Author(s):  
Irwin H. Billick ◽  
Menachem Dishon ◽  
George H. Weiss ◽  
David A. Yphantis
Keyword(s):  
Numerical Solutions ◽  
Lamm Equation

NUMERICAL SOLUTIONS OF THE LAMM EQUATION. V. BAND CENTRIFUGATION

1969 ◽  
Vol 164 (1 Advances in U) ◽  
pp. 33-51 ◽  
Author(s):  
Menachem Dishon ◽  
George H. Weiss ◽  
David A. Yphantis
Keyword(s):  
Numerical Solutions ◽  
V Band ◽  
Lamm Equation

PHYSICOCHEMICAL STUDIES OF ALKALI LIGNINS: II. ULTRACENTRIFUGAL SEDIMENTATION ANALYSIS

1960 ◽  
Vol 38 (2) ◽  
pp. 259-269 ◽  
Author(s):  
P. R. Gupta ◽  
R. F. Robertson ◽  
D. A. I. Goring
Keyword(s):  
Standard Deviation ◽  
Linear Relationship ◽  
Intrinsic Viscosity ◽  
Sedimentation Coefficient ◽  
Wide Distribution ◽  
Small Decrease ◽  
Sedimentation Analysis ◽  
Qualitative Interpretation ◽  
Physicochemical Studies ◽  
Lamm Equation

Ultracentrifugal sedimentation of alkali lignin fractions revealed marked boundary spreading at low and high centrifugal fields. An analysis of the gradient diagrams indicated a wide distribution of sedimentation coefficients ranging from 0.5 to over 400 × 10−13 second. There was only a small decrease in the polydispersity on subfractionation. The distributions were continuous with a single peak and positive skewness. A linear relationship was found between the intrinsic viscosity and the standard deviation of the weight-average sedimentation coefficient. The sedimentation coefficient based on the movement of the maximum ordinate at a field of 11.5 × 103 g was several times greater than the corresponding coefficient for the same fraction at 200 × 103 g. A qualitative interpretation of this phenomenon is given in terms of the Faxen and the Archibald solution to the Lamm equation.

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