Enige wenken ten behoeve van de aanleg en exploitatie van tuinen
Syneresis of curd
This study deals with the syneresis of curd. Rennet gels are primarily considered; some comparisons with acid milk gels are given.After curdling the milk, the curd tends to shrink; in other words, the network of aggregated paracasein micelles (PCM) will be under stress. If the curd is cut or - as was the case in our expirements - a curd surface is ...
Stormvloedkering Oosterschelde: Aansluiting fundatiemat-asfaltmastiek
Adsorption of polylysines at solid-liquid interfaces
Adsorption properties of the polyelectrolytes poly-L-lysine (PL-L) and poly-DL-lysine (PL-DL) on hydrophobic (polystyrene latex, silver iodide) and hydrophilic (silica) negatively charged solid particles were studied.Adsorbed amounts as a function of concentration, ionic strength, surface charge, PI, chain length and chain charge density were deter...
An experimental and theoretical study of oligo- and polyelectrolyte adsorption
The purpose of this study is the description of the behaviour of a model polyelectrolyte near a model interface.Chapter 1 gives a general background and the outline of the investigations.The chapters 2 and 3 comprise the theoretical parts. Chapter 2 considers the applicability of equilibrium thermodynamics to polymer adsorption, an important prereq...
Macromolecules at interfaces : a flexible theory for hard system
A statistical theory for flexible macromolecules at interfaces has been developed. The theory is based on a lattice model in which the equilibrium set of molecular conformations in a concentration profile is evaluated, using a selfconsistent procedure. In this way, the Flory-Huggins theory for polymer solutions is extended to inhomogeneous solution...
Foliebassins : gegevensverwerking van een enquete naar foliebassins alsmede analysering van de uitkomsten
Nieuw mengsysteem in foliebassin
In een gezamenlijk onderzoek van het IMAG en het PR is daarom een nieuw mengsysteem ontwikkeld, dat de genoemde bezwaren niet heeft.
Molecular structure and interfacial behaviour of polymers
The aim of this study was to investigate the influence of the molecular structure on the interfacial behaviour of polymers. Theoretical models were developed for three different systems. All these models are based on the self-consistent field theory of Scheutjens and Fleer for the adsorption of homopolymers.This self-consistent field theory is a la...
The adsorption of weak polyelectrolytes and polyampholytes : an experimental study
The objective of this study was to collect systematic data on the adsorption behaviour of weak polyelectrolytes and polyampholytes. The measurements were performed on well-defined systems in order to be able to compare the results with the recently developed theories of Evers et al. and Böhmer et al. for the adsorption of weak polyelectrolytes. The...
