scholarly journals The influence of lysosomes on glycogen metabolism

1977 ◽  
Vol 163 (2) ◽  
pp. 193-200 ◽  
Author(s):  
R Geddes ◽  
G C Stratton
Keyword(s):  
Molecular Weight ◽  
Molecular Weight Distribution ◽  
Rat Liver ◽  
Weight Distribution ◽  
Molecular Size ◽  
Glycogen Metabolism ◽  
Liver Homogenates ◽  
Different Molecular Weight

Lysosome-rich fractions were isolated from rat liver homogenates. In some fractions the lysosomes were separated from the contaminating mitchondria by the use of discontinuous Ficoll/sucrose gradients. Some glycogen was associated with lysosome fractions. This glycogen was of very large molecular size and of a quite different molecular-weight distribution from that isolated from the cytosol. It is suggested that appreciably more than 10% of cellular glycogen is located within the lysosome.

Equilibrium Molecular Weight Distribution of Cyclic and Linear Methylsiloxanes

1967 ◽  
Vol 40 (4) ◽  
pp. 1084-1093 ◽  
Author(s):  
Jack B. Carmichael ◽  
James Heffel
Keyword(s):  
Molecular Weight ◽  
High Molecular Weight ◽  
Molecular Weight Distribution ◽  
Weight Distribution ◽  
Equilibrium Constants ◽  
Molecular Size ◽  
Size Distributions ◽  
Flory Theory ◽  
Molecular Weights ◽  
Cyclic Molecules

Abstract Data are reported for the equilibrium molecular size distributions of cyclic and linear methylsiloxanes in five polymers with number average molecular weights ranging from 459 to 1348. The distributions of linear species agree with the earlier work of Scott and agree reasonably well with the Flory theory of random reorganization. The amounts of cyclic molecules are sharply dependent on molecular weight. However, the equilibrium constants for cyclic formation for cyclic species with four to eight units are shown to be virtually identical with the equilibrium constants for cyclic formation in high molecular weight polymers reported in a previous publication. For octamethylcyclotetrasiloxane, Kav in moles of siloxane units per liter was found to be 0.72 in this study. For high polymers, Kav was previously reported to be 0.74.

Influence and mechanism of different molecular weight organic molecules in natural water on ultrafiltration membrane fouling reversibility

RSC Advances ◽  
2016 ◽  
Vol 6 (86) ◽  
pp. 83456-83465 ◽  
Author(s):  
Weiguang Sun ◽  
Jun Nan ◽  
Jia Xing ◽  
Jiayu Tian
Keyword(s):  
Molecular Weight ◽  
Molecular Weight Distribution ◽  
Natural Water ◽  
Weight Distribution ◽  
Membrane Fouling ◽  
Organic Molecules ◽  
Ultrafiltration Membrane ◽  
Ultrafiltration Membrane Fouling ◽  
Different Molecular Weight

To investigate the influence of different molecular weight distribution to UF membrane fouling, NOM in natural water was fractionated into five components based on their size and their potential to develop the membrane fouling was conducted.

scholarly journals The molecular size and shape of liver glycogen

1977 ◽  
Vol 163 (2) ◽  
pp. 201-209 ◽  
Author(s):  
R Geddes ◽  
J D Harvey ◽  
P R Wills
Keyword(s):  
Molecular Weight ◽  
Molecular Weight Distribution ◽  
Weight Distribution ◽  
Diffusion Coefficients ◽  
Intensity Fluctuation ◽  
Laser Intensity ◽  
Molecular Size ◽  
Liver Glycogen ◽  
Sedimentation Rates ◽  
Hydrodynamic Behaviour

The molecular-weight distribution of liver glycogen has been established from the analysis of sedimentation rates of fractions separated on sucrose density gradients and from the direct measurement of the diffusion coefficients of these fractions by laser-intensity-fluctuation spectroscopy. Hydrodynamic studies indicated that all fractions of glycogen of mol.wt.exceeding 25x10(6) had about 1.1 g of water per g of polysaccharide associated with them. The hydration and hydrodynamic behaviour of all fractions of mol.wt. exceeding 25x10(6) was similar, whereas smaller fractions behaved anomalously, indicating a substantially different overall structure.

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