ISSN:0021-2148    

DOI:10.1002/ijch.196600010

出版商:WILEY‐VCH Verlag    

年代:1966

数据来源: WILEY

摘要:

AbstractHalf the lipids of myelin which belong to the cation‐insensitive complexes (i. e. 25% of the total lipids) are sensitive to anions and can be extracted by water after treatment with KCNS or Kl. Thin layer chromatography findings indicate that the cation‐insensitive complexes do not differ in lipid‐composition from the cation‐sensitive complexes. Histochemical findings indicate that the highly lyotropic anions inhibit the same enzymatic activities as the feebly lyotropic cation Ca.The implications of these findings on the structure of myelin and of cell membranes is discussed. The data are considered to fit best the concept of a plasma membrane in which one surface contains mainly anionic fixed groups and the other surface cationic

ISSN:0021-2148    

DOI:10.1002/ijch.196600011

出版商:WILEY‐VCH Verlag    

年代:1966

数据来源: WILEY

摘要:

AbstractWhile K+has a general stimulatory effect on respiration in Escherichia coli, Na+specifically enhances the rate of glutamate oxidation. Na+reduces the apparent Kmof the glutamate‐oxidase system with respect to the substrate 90 times, but has no influence on Vm.It is only effective when the cell structure remains intact, glutamate concentration is relatively low and hypotonic conditions prevail. In a cell‐free system the kinetic constants are not affected by Na+. Some implications of the above findings are discus

ISSN:0021-2148    

DOI:10.1002/ijch.196600012

出版商:WILEY‐VCH Verlag    

年代:1966

数据来源: WILEY

摘要:

Abstract(Some, but not all, monosaccharides evoke a “Stimulus” which elicits, a. melanophore reaction; b. contraction of the normal rat ileal smooth muscle and c. contraction of the potassium depolarised rat ileal smooth muscle. Oleate, palmitate. aspartate, glutamate and Krebs cycle intermediates are not stimulants. We propose a working hypothesis, according to which the stimulatory effect of sugars mediates an increased supply of ADP, whilst simultaneously decreasing the glycolysis and thus the supply of cell membrane N

ISSN:0021-2148    

DOI:10.1002/ijch.196600013

出版商:WILEY‐VCH Verlag    

年代:1966

数据来源: WILEY

摘要:

AbstractThe determination of exchange capacities of permselective membranes has been speeded up from 1–2 weeks to 1–2 days by use of electrodialytic methods for all exchange and washing processes. The total and the non‐quaternary capacities of anionic membranes are determined in a single operation. Capacities in general agree well with analytical data of the memb

ISSN:0021-2148    

DOI:10.1002/ijch.196600014

出版商:WILEY‐VCH Verlag    

年代:1966

数据来源: WILEY

摘要:

AbstractAqueous regions within cationic permselective membranes were filled by cathodically deposited silver and sections made of this material were observed in the electron microscope. The silver itself deformed the matrix and crystallized in large globules, but the background of the micrographs, the Ag form of the membrane, showed characteristic structural elements. Anionic membranes repeatedly impregnated with telluride ions and oxydized by air also contained granular tellurium metal, which evaporated during exposure to fast electrons in the electron microscope. Using only the sulphonium groups of the membranes or heavy counter ions as electron absorbing material, we examined the structure of some membranes. Those made of polyethylene reveal a series of black and white lines, often arranged in black‐white‐black triplets, which probably are cross sections of crystalline platelets of polyethylene, reacted on their surface. Those made of PVC reveal large areas which underwent substitution to a lesser extent, surrounded by more strongly reacted coherent material. Other membranes also show characteristic elements in their microstruct

ISSN:0021-2148    

DOI:10.1002/ijch.196600015

出版商:WILEY‐VCH Verlag    

年代:1966

数据来源: WILEY

摘要:

AbstractIn a series of preliminary experiments it was shown that LIEMs can be substituted for solid membranes in the conventional electrodialysis process. A specific mass transfer was demonstrated, causing either an increase or a decrease in the concentration of aqueous salt solutions, depending on the experimental set‐up. The liquid membranes tested were shown to be ion‐permselect

ISSN:0021-2148    

DOI:10.1002/ijch.196600016

出版商:WILEY‐VCH Verlag    

年代:1966

数据来源: WILEY

摘要:

AbstractFilters made of cellulose acetate and nitrate were saturated with toluene or bromobenzene and interposed between aqueous solutions. The membranes thus formed behaved like cation exchange membranes with the same capacity for both solvents. K ‐ Na bi‐ionic potential, its dependence on temperature, K ‐ Na selectivity and mobility ratio were similar in membranes saturated with the above solvents. However the absolute magnitude of the diffusibility was some 30 times lower in toluene saturated membranes. Activation energy of membrane conductance was higher by about 3800 cal/mole in the toluene saturated membrane. Electroosmotic phenomena in the membranes were negligible or nil. It is suggested that these membranes represent a prototype of ion exchange membranes, where the fixed charges with their counterions and hydration shell are embedded in hydrophobic m

ISSN:0021-2148    

DOI:10.1002/ijch.196600017

出版商:WILEY‐VCH Verlag    

年代:1966

数据来源: WILEY

ISSN:0021-2148    

DOI:10.1002/ijch.196600018

出版商:WILEY‐VCH Verlag    

年代:1966

数据来源: WILEY

ISSN:0021-2148    

DOI:10.1002/ijch.196600019

出版商:WILEY‐VCH Verlag    

年代:1966

数据来源: WILEY