Materials Literature
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Abstract A new mineral, yaroshevskite, ideally Cu 9 O 2 (VO 4 ) 4 Cl 2 , occurs in sublimates collected from the Yadovitaya fumarole at the Second scoria cone of the Northern Breakthrough of the Great Tolbachik Fissure Eruption, Tolbachik volcano, Kamchatka, Russia. It is associated with euchlorine, fedotovite, hemati…
Biological activity plays a substantial role in the geochemistry of the Earth’s surface. Particularly interesting are effects on clay formation because clays are abundant and have high surface-to-volume ratio, resulting in clays making up a large fraction of the overall mineral-fluid interface and having an effective…
“Vanadium-dravite” NaMg 3 V 6 (Si 6 O 18 )(BO 3 ) 3 (OH) 3 OH (IMA number 1999-050) has been redefined as oxy-vanadium-dravite with end-member formula NaV 3 (V 4 Mg 2 )Si 6 O 18 (BO 3 ) 3 (OH) 3 O. The new name and the new formula have been approved by the CNMNC (IMA proposal 11-E). Oxy-vanadium-dravite occurs in the…
A polarimetry based method able to characterize optical properties of linear Liquid Crystal Displays (LCDs), even in presence of time-fluctuations of the phase, is proposed in this work. In particular, mean linear retardance, Liquid Crystal (LC) fast axis orientation and phase fluctuation amplitude of LCDs can be obta…
Characterization of red onion skin tannin (ROST) was done using FTIR and UV/visible spectrophotometric techniques, revealing ROST to be made up of mixed (hydrolysable and condensed) tannins. ROST has been found to be an effective corrosion inhibitor of aluminium in hydrochloric acid solutions using gravimetric, thermo…
BACKGROUND: Naturally occurring nanoparticles isolated from English ivy (Hedera helix) have previously been proposed as an alternative to metallic nanoparticles as sunscreen fillers due to their effective UV extinction property, low toxicity and potential biodegradability. METHODS: This study focused on analyzing the…
ABSTRACT The nanocomposite of polypyrrole with organonophilic montmorillonite and hydrophilic montmorillonite clays was prepared by in situ polymerization of pyrrole monomer in the presence of montmorillonite nanoclays. FTIR spectroscopy studies and X‐ray diffraction pattern were used to confirm the formation of a pol…
The corrosion resistant alloy of Inconel 625 is cladded on the inner surface of the carbon pipeline steels of X65. Two sections of the corrosion resistant alloy (X65/Inconel 625) were welded by tungsten inert gas welding (TIG) with adding material of ERCrNiMo-3. The electrochemical behavior of the weld metal, heat aff…
Present study consists a simple and eco-friendly biosynthesis of silver nanoparticles using Sargassum longifolium aqueous extract as reducing agent. Aqueous silver ions when exposed to seaweed extract were reduced and results in silver nanoparticles. Characterization of these silver nanoparticles were done using UV-Vi…
The grain refinement mechanisms of Sr in the AZ31 magnesium alloys were studied by both phase diagram calculation and experimental analysis. The influence of Sr content on the solute distribution coefficients of Al and Zn during solidification was investigated in order to find out whether Sr addition can enhance the g…
Changing the sample's temperature from 200 K to 535 K, we observed 670-fold enhancement of a phonon-assisted upconversion emission at ≈754 nm obtained from a Nd3+-doped tellurite glass excited by 5 ns laser pulses at 805 nm. A rate-equation model, including the relevant energy levels and temperature dependent transiti…
Prewittite, ideally KPb 1.5 Cu 6 Zn(SeO 3 ) 2 O 2 Cl 10 , was found in the fumarole field of the second cinder cone of the North Breach of the Great fissure Tolbachik eruption (1975-1976, Kamchatka peninsula, Russia). It occurs as separate olive-green tabular crystals up to 0.2 mm in maximum dimension. It has vitreous…
The solution energy of H and He in various interstitial and substitution positions in the hcp lattice of α-Ti has been calculated based on the method of electron density functional. The lowest solution energy of He corresponds to the basal octahedral position and that of H corresponds to the octahedral position (next…
In this work, silver atoms were deposited by ion sputtering on the surface of diglycidyl ether of bisphenol A (DGEBA) epoxy resin cured at 150 °C for 6 hours in air. The films of DGEBA and its precursors were characterized by Raman spectroscopy to identify the main functional groups and their relationship with the dep…
Fluoroindate glasses are attractive materials for the fabrication of mid-infrared transmitting fibers with extended spectral range. Preparation of fluoroindate glasses under different melting conditions and preform fabrication using the billet extrusion technique were investigated in this study. Experimental results s…
The surface functionalized silicon carbide/carbon fiber (SiC/CF) hybrid fillers were introduced to improve the thermal conductivities and mechanical properties of the epoxy resin composites. Results revealed that, the thermal conductivities of epoxy resin composites were increased with the increasing volume fraction o…
Heart disease remains the major cause of death in males and females, emphasizing the need for novel strategies to improve patient treatment and survival. A therapeutic approach, still in its infancy, is the development of site-specific drug-delivery systems. Nanoparticle-based delivery systems, such as liposomes, have…
OBJECTIVE: To evaluate the suitability of citrate-coated very small superparamagnetic iron oxide particles (VSOP) as a contrast agent for identifying inflammation in atherosclerotic lesions using magnetic resonance imaging (MRI). METHODS AND RESULTS: VSOP, which have already been evaluated as a blood pool contrast age…
Using a combination of transient photoluminescence and transient cathodoluminescence (trCL) we, for the first time, identify and quantify the distribution of electronic excitations in colloidal semiconductor nanocrystals (NCs) under high-energy excitation. Specifically, we compare the temporally and spectrally resolve…
Ag-Si codoped TiO2 nanoparticles were successfully synthesized via a rapid and energy frugal microwave-assisted solvothermal method. The obtained materials were characterized by XRD, BET, TEM, XPS, and UV-Vis DRS. These characterizations revealed that the obtained materials possessed good crystallinity, small particle…