Today, due to the natural decline of oil exploitation, the use of methods of oil recovery, has made significant progress. However, these methods are accompanied by accumulation and deposition of mineral deposits in oil field installations. In the present study, aqueous solutions, strontium sulfate, barium sulfate, manganese sulfate and nickel sulfate are studied, in terms of EUNIQUAC model and ...

Alveolarization of the barium sulfate and subsequent retention of barium sulfate for years was demonstrated in three patients in whom dilute suspension of barium sulfate in water was used for bronchography. Pathologic examination in one patient showed barium sulfate within macrophages in the alveolar spaces and walls and in the perivascular and peribronchial interstitium. Since the residual bar...

barium sulfate (barite) is one of the widely used weighting materials in the preparation of drilling fluid for deep oil and gas wells. barite is not soluble in the regular solvents; such as, hydrochloric acid (hcl) and other acids. therefore, in this study, we focused on evaluating the dissolution of the industrial barite particles in different chelating agents. chelating agents; such as, dieth...

Halloysite nanotubes (HNTs) were investigated as a platform for tunable nanoparticle composition and enhanced opacity in poly(methyl methacrylate) (PMMA) bone cement. Halloysite has been widely used to increase the mechanical properties of various polymer matrices, in stark contrast to other fillers such as barium sulfate that provide opacity but also decrease mechanical strength. The present w...

BACKGROUND The use of high-density barium sulfate was recommended by the Japan Society of Gastroenterological Cancer Screening (JSGCS) in 2004. We evaluated the diagnostic validity of gastric cancer screening that used high-density barium sulfate. METHODS The study subjects were 171 833 residents of Osaka, Japan who underwent gastric cancer screening tests at the Osaka Cancer Prevention and D...

glass ampules was identified as barium sulfate crystals by using scanning electron microscopy and energy dispersing X-ray analysis. Barium sulfate crystals isolated from these solutions occurred as single or agglomerated crystals which were 0.5-2.0 ƒÊm long in maximum dimension. Barium sulfate crystal formation in usual ampules tended to increase with increasing temperature of sterilization, bu...

A woman was evaluated for dyspnea after she inhaled barium sulfate during an upper gastrointestinal barium study that was administered by means of a percutaneous endo scopic gastrostomy tube. A plain radiograph of the chest revealed alveolar barium sulfate depositions (arrows) in the middle lobe of the right lung and in the lower lobes and the posterior aspects of the upper lobes of both lungs ...

The key aspect of minimizing the descent of quality and productivity in papermaking is to identify the origins of scale and to realize the appropriate treatment. Scale derived from calcium, silicon and aluminium is most commonly reckoned and easily collected. In the present study, we focus our attention on another serious situation of such adherent scale as barium sulfate, of which boil-out tre...

The use of polyvinyl alcohol polymer as a binder for barium sulfate does not allow the intrinsically high reflectance of barium sulfate in the 200-300-nm range to be optimally employed. In an effort to better utilize this property, totally inorganic coating systems are described. Potassium sulfate turns out to be the preferred binder for reflectance enhancement. Compositions, formulating proced...

Ethylenediaminetetraacetic acid (EDTA) is a known complexing agent that interacts with a host of cations. In this paper, various techniques are used to elucidate the mechanism of interaction between EDTA and barium sulfate surfaces. It is shown that complexation with metal ions is not sufficient to explain the inhibition of barite crystallization but that other processes such as chemisorption m...