This article describes investigations on the phase development (T ≤ 1500℃) of phosphate-bonded Al2O3-MgAl2O4 high-temperature ceramics by a combination solid-state MAS NMR and X-ray diffraction analyses. The ceramic body was bonded with inorganic hydrogen orthophosphates (Al, Mg, Ca, Zr) total binder content 3 wt.% P2O5. binding mechanisms these could be extensively deduced analyses development...

Relevance. Phosphate mineralization of Devonian intrusions in the Eastern zone Middle Urals is currently poorly understood, data obtained may be important for interpreting origin rocks, especially case when standard methods geochemical analysis rocks do not give a clear picture. Xenotime and monazite are minerals concentrating rare earth elements, REE distribution graphs very characteristic roc...

As phosphate derivatives form such important intermediates between the functioning of tissues and the metabolism which supports function, we decided to investigate the levels of certain phosphates in brain slices before and during metabolism in vitro. Investigation of this type appeared all the more necessary because there is now an extremely interesting group of observations on the levels of p...

U nlike enzymes that depend on other proteins to rein in their activity, polo-like kinase 4 (Plk4) does the job itself. Holland et al. reveal that Plk4, which helps regulate centro-some duplication, reduces its activity by initiating its own destruction (1). By sacrifi cing itself, the protein prevents cells from building too many centrosomes. Cells prepare to divide by duplicating the centroso...

Pirie, van Heyningen & Flanders (1955) showed that the concentrations of certain acid-soluble phosphates in the lens, when estimated by the enzymic method of Slater (1953), were much lower than the concentrations reported by Nordmann & Mandel (1952), who used the barium-fractionation method of LePage (1948, 1949). This method has, until recently, been the accepted and standard one for estimatio...

Introduction: Phosphate minerals are thought to occur in chondritic parent bodies mainly as a result of secondary alteration processes [1]. Jones et al., [2] investigated the textural occurrences of phosphates in a range of Ordinary Chondrites (OCs) (petrologic types 3.9–6) and found support for a model involving progressive solid-state recrystallisation and equilibration in a closed parent bod...