Saybolt is a petrochemical company that invest in different types of oils and fuels. Saybolt Vlaardingen has purchased a new Perkin Elmer Optima 8300 ICP-OES (Inductively coupled plasma optical-emission spectrometry) that must be validated. The ICP-OES is used to analyze metals in petroleum products. This …

In the Province of Zeeland, ragworms (Alitta virens) are farmed on large scale in open rectangular (flow through systems) ponds. In April these ponds are stocked with ragworm larvae from a hatchery. The juveniles bury themselves in the sediment layer in the pond and are fed with feed pellets. Dependent …

INTRODUCTION: Minerals may contribute to prevent and treat sarcopenia, the age-related loss of muscle mass, muscle strength, and physical performance. So far, there is no comprehensive review on the impact of minerals on sarcopenia outcomes. The aim of this systematic review is to evaluate the role of …

Rationale: Minerals may contribute to prevent and treat sarcopenia, the age-related loss of muscle mass, muscle strength, and physical performance. The aim of this systematic review is to evaluate the role of calcium, iron, magnesium, phosphorus, potassium, selenium, sodium, and zinc on muscle mass, …

The limited natural phosphorus reserves in the world are gradually depleting. This makes it interesting to look for other ways of recovering phosphorus. One of the possibility’s is the recovery of phosphate (PO4) from industrial and municipal waste water, by the precipitation of struvite. By dosing magnesium …

De waterkwaliteit van het oppervlaktewater in het beheergebied van Waterschap Peel en Maasvallei wordt sterk beïnvloed door de huidige landbouw, nalevering uit de bodem en water dat over de landsgrenzen binnenkomt. De verwachting is dat de nalevering uit de bodem nog tientallen jaren de waterkwaliteit …

To solve the problem of phosphorus leaching, the new method which uses iron-coated sand to absorb the ortho-P through the drainage pipes was generated recently. However, the method still need more research to apply it in practice. For this purpose, a main question of the thesis is generated: how is the …

The copper(II) catalyzed enantioselective 1,4-addition reactions of diethylzinc to cyclic enones in the presence of novel phosphorus amidite ligands, easily prepared from α,α,α',α'-tetraphenyl-2,2'-dimethyl-1,3- dioxolane-4,5-dimethanol (TADDOL) derivatives, resulted in e.e.s up to 71% for cyclohexenone …