Abstract Reactive silica additives, such as clays, can increase the filterability of phosphogypsum (PG) during wet phosphoric acid production from phosphate rock (PR). In this study, effect adding inexpensive fly ash waste (34 kg per t PR) together with lower quantities pure (8.5 on radioactivity PG was investigated. The addition waste/pure reduced radiological activity by roughly 30%. reductio...

Nuclease activity was dissociated from proteolytic activity when Sachs confirmed the observations of Milroy that an agent which attacked nucleic acid to liberate inorganic phosphoric acid could not liquefy gelatin and that proteolytic enzymes liquefied gelatin but could not attack nucleic acid (1). Henceforth the rate of separation of inorganic phosphoric acid from nucleic acid became the exclu...

Food sources,mineral redistribution, and excreta are someof theways ants enrich their mound environment. Phosphorus excretion has not been reported in red imported Þre ants, Solenopsis invicta Buren. QuantiÞcation of phosphoric acid in worker fecal droplets and larval anal liquid of S. invicta was performed. Phosphoric acid was trimethylsilylated using N,O-bis(trimethylsilyl)trißuoroacetamide, ...

Current industrial methods of biodiesel production lead to an excess crude glycerin which requires costly purification before commercialization. Production oxygenated fuel additives is a potential route for valorization. Glycerin acetylation was carried out over heterogeneous acid catalysts (15%, glycerol weight basis) using glacial acetic (molar ratio = 9). The catalysts, containing different ...

Polyetheretherketone (PEEK) is a material suitable for frameworks of fixed dental prostheses. The effect of different surface treatments on the bond strength of PEEK bonded to human dentin was evaluated. One hundred PEEK cylinders (3 mm×3 mm) were divided into five groups according to surface treatment: silica coating, sandblasting with 45 μm Al2O3 particles, etching with 98% sulfuric acid for ...

Phosphoric acid monoesters are among the most important substances in materials chemistry, medicinal chemistry, and so on. Many phosphoric acid monoesters have been synthesized on an industrial scale and are used as necessities in our daily life. From the perspective of green chemistry, the direct catalytic condensation of equimolar amounts of phosphoric acid and alcohols is attractive for the ...