Polielektroliti so skupina linearnih polimerov, katerih monomerne enote vsebujejo naboj. Običajno gre za ionizirajoče skupine, ki v vodnih raztopinah disociirajo na več-valentni poliion in nasprotno nabite protiione. Ioneni so vrsta polielektrolitov, katerih glavno verigo sestavljajo različno dolgi nizi metilenskih skupin, ločeni s pozitivno nabiti...
Summary Silver nanoparticles (Ag NPs) are among the most promising groups of NPs (particles with all dimensions below 100 nm) for application in numerous consumer products due to their broad spectrum antimicrobial activities. Examples are incorporation in textiles and plastics, personal care products, water filters, food supplements etc. The extens...
A new approach has been proposed to measure the concentration of phosphate anion in liquid via optical fiber evanescent wave method. A standard single-mode optical fiber is used and its extramural cladding is corrupted by hydrofluoric acid. The optical fiber sensor was put into phosphomolybdate blue solution with different concentrations. The evane...
Ion specifieke sensoren voor de glastuinbouw worden momenteel ontwikkeld door verschillende bedrijven. De normale praktijk is nu nog om drainwater monsters elke 7-14 dagen op te sturen naar een lab (terug binnen 24 uur in Holland). Enkele van de bestaande meetgegevens worden gepresenteerd.
cum laude graduation (with distinction)
Ion specifiek meten en sturen is het online en ter plaatse meten van de macro-elementen in voedingswater en drainwater met als doel in een volgende gift water en voeding af te stemmen op de behoefte van de plant.
The research described in this thesis is about ion behaviour in milk systems as a function of changing conditions (pH, ionic strength, addition of electrolytes and non-electrolytes). The focus was on (i) quantification of the ion equilibria in milk systems based on experimental conditions, (ii) development of quantitative models describing the ion ...
WUR Glastuinbouw onderzoekt welke multi-ionensensoren het meest geschikt is voor de glastuinbouw. Hiermee zou een vergaande controle over de nutriënten- en waterhuishouding mogelijk zijn. De sensoren van Capilix en CleanGrow hebben de beste papieren.
Intense room-temperature near infrared (NIR) photoluminescence (980 nm and 1032 nm) is observed from Yb,Al co-implanted SiO2 films on silicon. The optical transitions occur between the F-2(5/2) and F-2(7/2) levels of Yb3+ in SiO2. The additional Al-implantation into SiO2 films can effectively improve the concentration quenching effect of Yb3+ in Si...
This study aims to provide a better basis for application of adsorption models for metal (hydr)oxides to natural multicomponent systems. Adsorption of any ion in the environment will be potentially influenced by the effect of other ions present like calcium, phosphate, carbonate etc. The study starts with a detailed study of the binding of ions as ...
