| | 1 | Author
| Hans Gruler | Requires cookie* | | | Title
| Chemoelastic Effect of Membranes  | | | | Abstract
| The elastic theory of a uniaxial membrane in an asymmetric environment predicts a spontaneous splay deformation. This spontaneous curvature of the membrane is discussed by the intrinsic splay of the membrane molecules (e. g. wedge shaped molecules) and their polar orientation. The chemoelastic effect is the polar orientation induced by the asymmetric environment in connection with the intrinsic splay. This effect is also discussed for polyelectrolytes where a small change of pH (~0.1) can lead to a spontaneous curvature of 104 cm-1. The actual shape of red blood cells can be explained by the spontaneous splay and a change in environment induces the change in shape of these cells. A model is proposed for two conical bodies swimming in a uniaxial membrane which interact with each other through elastic coupling. The force between the bodies can be either attractive or repulsive. As an example of this model clustering of proteins is discussed. | | | |
Reference
| (Z. Naturforsch. 30c, 608—614 [1975]; received June 18 1975) | | | |
Published
| 1975 | | | |
Keywords
| Membrane, Elasticity, Erythrocyte, Enzyme Coupling | | | |
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| | | | | TEI-XML for
| default:Reihe_C/30/ZNC-1975-30c-0608.pdf | | | | Identifier
| ZNC-1975-30c-0608 | | | | Volume
| 30 | |
| 2 | Author
| R. Hampp, C. Kriebitzsch | Requires cookie* | | | Title
| Effect of Zinc and Cadmium on 5-Aminolevulinate Dehydratase of Red Blood Cells in Protecting against Enzyme Losses during Storage | | | | Abstract
| The effect of zinc and cadmium on <5-aminolevulinate dehydratase of bovine erythrocytes stored at — 30 °C for different times was determined. The results show a. storage of erythrocytes leads to an enhancement of the enzyme activity, which after six weeks is 165% (500 [*.M ZnCl2) respectively 220% (100 /um CdCl2) for red blood cells of calves, and after four weeks is 420% respectively 450% (same concentrations) for red blood cells of adult cattle, b. the older the samples are, the higher is the metal concentration, needed for activation. | | | |
Reference
| (Z. Naturforsch. 30c, 434 [1975]; received March 5/April 151975) | | | |
Published
| 1975 | | | |
Keywords
| <5-Aminolevulinate Dehydratase, Erythrocytes, Zinc, Cadmium | | | |
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| | | | | TEI-XML for
| default:Reihe_C/30/ZNC-1975-30c-0434.pdf | | | | Identifier
| ZNC-1975-30c-0434 | | | | Volume
| 30 | |
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