Bioactive glass ionomer cements (GICs), the reaction product of a fluoro-alumino-silicate glass and polyacrylic acid, have been in effective use in dentistry for over 40 years and more recently in orthopaedics and medical implantation. Their desirable properties have affirmed GIC's place in the medical materials community, yet are limited to non-load bearing applications due to the brittle natu...

Highly sensitive and selective direct spectrophotometric method is proposed for the determination of aluminium in various real samples. 5-Bromo-2-hydroxy-3-methoxybenzaldehyde-phydroxybenzoic hydrazone reacts with Al(III) forming yellow coloured soluble complex in aqueous dimethyl formamide which has a λmax at 390 nm in the pH range 3.0-7.0. The system obeyed Beer’s law in the range 0.053 – 0.7...

Abstract We identified dmisteinbergite, the rare trigonal polymorph of CaAl2Si2O8, for first time in high-grade metamorphic rocks. Dmisteinbergite occurs as a crystallization product silicate melt inclusions (nanogranitoids) garnet from three host rocks with different protoliths and re-equilibration conditions, i.e., 1.0 to 4.5 GPa. Raman spectra compositions dmisteinbergite here investigated a...

Deposition, clearance, retention, and durability of inhaled particles in lung are important factors for induction of pulmonary fibrosis or lung cancer. To study the deposition and clearance of aluminium silicate ceramic fibers from the lung, male Wistar rats were exposed to ceramic fibers, with a mass median aerodynamic diameter (MMAD) of 3.7 microns, for 6 hr/day, 5 days/week for 2 weeks. The ...

Formulators are charged with the responsibility to formulate a bioequivalent product (in case of ANDA) product which is physically and chemically stable, manufacturable at commercial scale. Different crystal structures in polymorphs arise when the drug substance crystallizes in different crystal packing arrangements and/or different conformations. Besides, Polymorphs cocrystallization is now im...

Adhesive bonding is a key joining technique for aluminium alloy components in the automotive industry. Plasma Electrolytic Oxidation (PEO) an emerging surface treatment protection of metal alloys including those aluminium. This work set out to assess adhesive bond strength and behaviour PEO coated AA6060-T6. Thin (15 25 μm) oxide coatings were produced on AA6060-T6 by electrolytic phosphate sil...

After staining with the BSG technique for constitutive heterochromatin, human polymorphs exhibit chromocentres which are presumably derived from these chromosomal regions. In five individuals having an extended centromeric heterochromatin region on one No. 1 chromosome, a particularly large chromocentre was seen in the majority of polymorphs. Thus, prominent chromocentres in polymorphs may indi...

Abstract A dense magnesium iron silicate polymorph with a structure intermediate between olivine, ringwoodite, and wadsleyite was theoretically predicted about four decades ago. As this group of minerals constitute the major component shocked meteorites, constraining their transitional forms behaviour is potential importance for understanding impact events on parent bodies. Here we use high-res...

For most inorganic solids, very few dense polymorphs and no low-density polymorphs are observed. Taking a wide range of tetrahedrally-coordinated binary solids (e.g., ZnO, GaN) as a prototypical system, we show that the apparent scarcity of low- density polymorphs is not due to significant structural or energetic limitations. Using databases of periodic networks as sources of novel crystal stru...

In this paper, we investigated two originated metamorphosed harzburgites of the metaperidotite complex from the northern part of the Gishaki area. Harzburgite rocks, as main ultramafic complexes of the studied area, were exposed in the scattered location of the area. Despite intensive alterations, harzburgitic units were discriminated using petrography and Raman spectroscopy studies of relict m...