The study reports petrography, mineralogy and carbonate geochemistry stable isotopy of various types ocelli (silicate-carbonate globules) observed in the lamprophyres from Chadobets Uplift, southwestern Siberian craton. are related to REE-bearing Chuktukon carbonatites. On basis their morphology, relation with surrounding groundmass, we distinguish three ocelli: carbonate-silicate, containing c...

Introduction: The magmatic volatiles water, fluorine, and chlorine play critical roles in the physicochemical processes that control thermal stabilities of minerals and melts, magma eruptive processes, and transport of economically important metals. While these volatiles are significant constituents in many terrestrial and martian magmas, lunar magmas are generally depleted in these three volat...

The decrease in elastic moduli (Young's, bulk, and shear modulus), the variations in their asymmetries, the Poisson's ratio and the linear compressibility due to carbonate formation in NaX, have been compared to those produced by dealumination of the zeolite HY framework, from the Al-Si-Al fragment positioned in joined 4R rings. All these systems have been considered at the density functional t...

INTRODUCTION Calcified deposits (CDs) in skin and muscles are common in juvenile dermatomyositis (DM), and less frequent in adult DM. Limited information exists about the microstructure and composition of these deposits, and no information is available on their elemental composition and contents, mineral density (MD) and stiffness. We determined the microstructure, chemical composition, MD and ...

Glycerol carbonate acrylate is a 5-membered cyclic carbonate synthesized from glycerol that is used as a chemical coupling agent and has proven highly suitable for use in the synthesis of multifunctional polyhydroxyurethanes (PHUs). The multifunctionality of the structure of PHUs is determined by the density of the carbon-amine groups generated by the Aza-Michael reaction and that of the uretha...

In this work needle like hydroxy apatite were synthesized in a reverse microemulsion droplets of water in cyclohexane, separated by a cationic surfactant and co-surfactant, in the presence of Na-polyacrylate (PAA) as an anionic polyelectrolyte. Characterization of the as formed HAp nanoparticles at the room temperature were carried out by X-ray diffraction (XRD) and Fourier transform infrared s...

We investigated the environmental conditions that prevailed in continental ecosystems recorded sedimentary deposits of Japan during Cretaceous through analysis oxygen and carbon isotope compositions phosphate (?18Op) apatite-bound carbonate (?18Oc ?13Cc) vertebrate teeth bones. Local surface water ?18Ow values were calculated using known phosphate-water fractionation equations. Anomalously low ...

Two polyphenol oxidases (enzymes A and B) from Bartlett pear (Pyrus communis) peelings were purified to electrophoretic homogeneity according to polyacrylamide gel by a combination of Sephadex gel filtration, diethylaminoethyl cellulose chromatography and hydroxyl apatite chromatography. While the two enzymes differ electrophoretically at pH 9.3, chromatographically on hydroxyl apatite, and in ...

• Magmatic evolution progressed from mafic to ultramafic. Formation of replacive metasomatic dunites. High MgO melts assimilated limestone forming carbonate and sulfide melts. Late stage magmatic brecciation. Ni-Cu-PGE mineralisation associated with apatite carbonate. The Munali Intrusive Complex is hosted within supracrustal metasedimentary rocks located along a major structural lineament the ...