De glaselektrode en de bepaling van den zuurgraad van den grond
Zuurgroepenanalyse en kationenbinding bij huminezuren
The interaction of certain inorganic anions with clays and soils
Interaction between anions and soil colloids was governed by 2 antagonistic processes, anion exclusion and positive anion adsorption. The predominantly negative charge on the colloids caused anion repulsion; positively charged sites and chemisorption resulted in positive adsorption.Experimentally determined adsorption was the resultant of the 2 pro...
An improved technique for the preparation of Streptomyces peptidases and N-acetylmuramyl-l-alanine amidase active on bac...
Peer reviewed
Bepaling van de specifieke weerstand in situ
Bepaling van de chemische samenstelling van het grondwater en in het bijzonder het chloridegehalte is één van de voornaamste onderdelen van het geo-hydrologisch onderzoek in gebieden waar verzilting van open water door kwel optreedt. Daar het electrisch geleidingsvermogen van water bij benadering een indruk geeft over de hoeveelheid opgeloste zoute...
Isolation of DD carboxypeptidase from Streptomyces albus G culture filtrates
peer reviewed / Streptomyces albus G secretes a soluble DD carboxypeptidase whose catalytic activities are similar to those of the particulate DD carboxypeptidase from Escherichia coli. Both enzymes hydrolyze the C-terminal D-alanyl-D-alanine linkage of UDP-N-acetylmuramyl-L-alanyl-γ-D-glutamyl-(L)-meso-diaminopimelyl-(L)-D-alanyl-D-aIanine and the...
Peptide inhibitors of Streptomyces DD-carboxypeptidases
1. Peptides that inhibit the dd-carboxypeptidases from Streptomyces strains albus G and R61 were synthesized. They are close analogues of the substrates of these enzymes. The enzymes from albus G and R61 strains are in general inhibited by the same peptides, but the enzyme from strain R39 differs considerably. 2. The two C-terminal residues of the ...
Étude à l'aide de l'optique intégrée des processus de diffusion et d'échange d'ions dans un verre alcalin
Nous montrons comment on peut, à l'aide de l'analogie entre l'équation des modes TE d'un guide et l'équation de Schrôdinger, étudier théoriquement des guides d'ondes lumineuses à gradient d'indice. Nous appliquons cette méthode aux guides réalisés par échange Li+ ↔ Na+ ou Ag+ ↔ Na+, dans un verre au sodium. L'accord entre théorie et expériences est...
Verschillen in adsorptiecapaciteit tussen gronden binnen het ruilverkavelingsgebied Kruisland - Wouw, een mogelijkheid t...
Mössbauer investigations of Nafion membranes
Mössbauer experiments have been performed on Nafion ion exchange membranes neutralized with iron chloride. The recoilless fraction falls to zero at a temperature which depends on the water content, showing that the rigidity of the local ion environment is greatly influenced by the amount of water retained in these membranes. Two different iron site...
