Barium tin(II) chloride fluorides were found to have a diversified behavior with respect to oxidation. Three types of situations were observed: (i) slow “fluoridelike” oxidation, (ii) moderate speed of oxidation, (iii) “fast” oxidation. The two latter categories were found only for the Ba1-x...
The article deals with the perspectives of producing heat-resisting materials on the base of serpentine rocks (a by-product of asbestos production) and the factors preventing it. The section “Materials and methods” describes the methods used in the work and the characteristics of materials. Th...
Biphasic, triphasic and multiphasic (polyphasic) calcium orthophosphates have been sought as biomaterials for reconstruction of bone defects in maxillofacial, dental and orthopedic applications. In general, this concept is determined by advantageous balances of more stable (frequently hydroxyapa...
This study demonstrates the feasibility of using a voltammetric electronic tongue to monitor effluent dissolved orthophosphate concentration in a struvite precipitation reactor. The electrochemical response of the electronic tongue to the presence of orthophosphate in samples collected from the ...
In the present work, the setting reaction of magnesium sodium phosphate cement was followed in time with in-situ attenuated total reflectance Fourier-transform infrared spectroscopy and solid state nuclear magnetic resonance spectroscopy, in order to gain insights into the products and phase tra...
A recently published paper authored by Gardner et al. [Characterisation of magnesium potassium phosphate cement blended with fly ash and ground granulated blast furnace slag, Cem. Concr. Res. 74 (2015) 78–87] is discussed. This work is of great significance in understanding the reaction mechani...
Dental caries, also known as tooth decay or a cavity, remains a major public health problem in most communities even though the prevalence of disease has decreased since the introduction of fluoride for dental care. In addition, there is dental erosion, which is a chemical wear of the dental har...
SummaryThe present overview is intended to point the readers’ attention to the important subject of calcium orthophosphates (CaPO4). This type of materials is of the special significance for the human beings because they represent the inorganic part of major normal (bones, teeth and antlers) an...
Crucial information on reaction products in magnesium potassium phosphate ceramics, essential for material design, is lacking. Setting reaction has been followed with time resolved infrared spectroscopy, supported by 2D correlation spectroscopy. We found evidence of a first amorphous orthophosph...
Compound samples based on the mineral-like magnesium potassium phosphate matrix MgKPO4 × 6H2O were synthesized by solidification of high level waste surrogate. Phase composition and structure of synthesized samples were studied by XRD and SEM methods. Compressive strength of the compounds is 12...
The effect of sodium metavanadate (NaVO3) exposure on lipid oxidative damage in the CNS of suckling rats was studied. Using histological markers of cellular injury, we also studied the morphological alterations of neurons and astroglial cells in different regions of neonate rats CNS after NaVO3 ...
The direct amination of benzene to aniline with hydroxylamine catalyzed by sodium metavanadate in acetic acid water under mild conditions took place more efficiently in open air than in a closed system. The presence of oxygen significantly enhanced the yield of aniline. Satisfactory aniline yiel...
In the present work, in vivo ROS formation and the activity of antioxidant enzymes in the hippocampus and the cerebellum of sodium metavanadate (NaVO3) treated rats were studied. Rats were i.p. injected with 3 mg/kg bw/day (V1 group) or with 7.2 mg/kg bw/day of NaVO3 (V2 group) for 5 consecutive...
The homogenous liquid-phase direct catalytic oxidation of benzene to phenol was performed at room temperature in acetonitrile solvent using sodium metavanadate as the catalyst and hydrogen peroxide as the oxidant. The effects of various reaction parameters, such as acidity of the system, reactio...
A spectrophotometric method for the determination of diltiazem hydrochloride has been developed. The drug is boiled with sodium metavanadate in sulfuric acid medium (11.0 M) for 20 min and the absorbance is measured at 750 nm. Beer’s law is obeyed up to 50 μg ml−1 with R.S.D. of 1.07% and mola...
Learning can be severely impaired as a consequence of exposure to environmental pollutants. Vanadium (V), a metalloid which is widely distributed in the environment, has been shown to exert toxic effects on a variety of biological systems including the nervous system. However, studies exploring ...
Vanadium is a contaminant of crude oil that released into the atmosphere through burning of fossil fuels. The mechanism by which it exerts toxic influences had not been fully elucidated in African giant rat (AGR). This study investigates the mechanisms of sodium metavanadate (SMV) induced oxidat...
Conventionally, metallic vanadium is produced from vanadium pentoxide (V2O5). Sodium metavanadate (NaVO3) is an essential intermediate product for the V2O5 production. A novel environmentally friendly route for the metallic vanadium preparation from NaVO3 by molten salt electrolysis is proposed....
Molybdenum carbide nanoclusters supported on alumina were promoted by Rb2CO3 and tested for higher alcohol synthesis from syngas. At 573 K and 30 bar syngas (H2/CO = 1), the promoted catalyst demonstrated 63% selectivity to alcohols (on a CO2-free basis), with hydrocarbons and ethers as side pro...
Nearly half of the world's Mo resources are hosted in Cenozoic porphyries along the east Pacific margin. In contrast, there are essentially no large Mo porphyry deposits along the west Pacific. We propose that this uneven distribution is mainly due to Oceanic Anoxic Events (OAEs) and the di...
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