Nieuwe verwaarding algenbiomassa : literatuurstudie en praktische screening van enkele ontsluitingsmethoden

Om de eiwitten, oliën, koolhydraten, carotenoïden en andere nuttige stoffen aanwezig in algencellen los van elkaar te kunnen benutten, is het nodig om de celwanden van de algen open te breken, ofwel om de algen te ontsluiten. Uiteraard is het van belang om dit te doen op een manier die de te winnen componenten zo min mogelijk beschadigt. Dit rapport bestaat uit twee delen. Het eerste is een literatuurstudie waarin een aantal algensoorten wordt omschreven, met waar mogelijk nadruk op de celwandstructuur. Verder wordt een aantal methoden beschreven om de celwanden te openen of te verzwakken. In het tweede deel van het rapport worden een aantal uitgevoerde proeven beschreven waarbij algen zijn behandeld met enzymen, schoonmaakazijn, of ethanol

Long Cycles in a Perturbed Mean Field Model of a Boson Gas

In this paper we give a precise mathematical formulation of the relation between Bose condensation and long cycles and prove its validity for the perturbed mean field model of a Bose gas. We decompose the total density $\rho=\rho_{{\rm short}}+\rho_{{\rm long}}$ into the number density of particles belonging to cycles of finite length ($\rho_{{\rm short}}$) and to infinitely long cycles ($\rho_{{\rm long}}$) in the thermodynamic limit. For this model we prove that when there is Bose condensation, $\rho_{{\rm long}}$ is different from zero and identical to the condensate density. This is achieved through an application of the theory of large deviations. We discuss the possible equivalence of $\rho_{{\rm long}}\neq 0$ with off-diagonal long range order and winding paths that occur in the path integral representation of the Bose gas.Comment: 10 page

Metallo-supramolecular coordination polymers : polyelectrolyte behavior

The addn. of metal salts to the polymeric spacer unit bis(terpyridinyl)-poly(ethylene oxide) provides water-sol. high mol. wt. coordination polymers with interesting soln. properties. The incorporated charges might lead to enhanced performance as flocculation agents. The reversibility of the metal complex moieties facilitates applications as intelligent hydrogels for drug delivery. Here we present the synthesis of cobalt(II)acetate and iron(II)chloride coordination polymers and the investigation of the influence of the counter ions on the polyelectrolyte behavior in sol

A field trial on the effects of algae addition to calf feed. Project T2014

This report describes a field trial that took place between 1 July and 2 October 2015 at a Dutch rose veal farm in which a group of 30 calves was fed with formula milk of which 2% of the dry matter was substituted with concentrated freshwater algae. The control group consisted of 25 calves. The farm owners collected the data, which were statistically analyzed and reported at ACRRES. During the trial the following parameters were monitored: calf weight, amounts of formula milk, water, solid feeds, feed additions and medication, deviations in manure structure, and disease incidence. Individual calf weights were determined at arrival and four weighing dates. The main conclusion of this field trial is that the addition of algae to the formula milk of rose veal calves during a period of 44 to 51 days did not have a statistically significant effect on calf weight increase up to 13 weeks after the start of the trial

Automated screening of solution viscosities using poly(ethylene oxide)s and coordination polymers

The investigation of polymers using soln. viscometry is a well-established methodol. in polymer science. Here we present a set-up for high-throughput automated viscosity measurements that facilitates automated sampling from the reaction vessels of an automated synthesizer, automated diln. and calcn. of the intrinsic viscosities of polymer samples. Besides the screening for mol. wts. we outline the investigation of the reversibility of metallo-supramol. polymers on the basis of viscosity measurement