Background: Public health officers (PHOs) are the frontline workforce against Coronavirus disease 2019 (COVID-19) and therefore need high immunity for protection. The application of capability, opportunity, motivation, behavior (COM-B) model aimed to 1) explore level COM-B prevention control COVID-19, 2) analyze association between factors behaviors COVID-19 among PHOs at primary care units (PC...

background: some studies have shown that casein phosphopeptide-amorphous calcium phosphate (cpp-acp) and acidulated phosphate fluoride (apf) gel can protect teeth against erosion. the aim of this study was to assess whether cpp-acp and fluoride could reduce enamel wear rates under erosive conditions simulating abrasion and acidic diet regimen. materials and methods: enamel specimens consisted o...

The thermal crystallization of citrate-stabilized amorphous calcium phosphate leads to the formation pure hydroxyapatite and represents an interesting route for producing ceramics biomedical applications.

The application of stabilization technologies to a radiologically contaminated surface has the potential for reducing spread contamination and, as result, decreasing worker exposure radiation. Three technologies, calcium chloride (CaCl2), flame retardant Phos-Chek® MVP-Fx, and Soil2OTM were investigated evaluate their ability reduce resuspension tracking radiological during response activities ...

The crayfish Cherax quadricarinatus stores calcium ions, easily mobilizable after molting, for calcifying parts of the new exoskeleton. They are chiefly stored as amorphous calcium carbonate (ACC) during each premolt in a pair of gastroliths synthesized in the stomach wall. How calcium carbonate is stabilized in the amorphous state in such a biocomposite remains speculative. The knowledge of th...

The P123/ACP nanocomposite with sizes less than 100 nm consisting of triblock copolymer P123 and amorphous calcium phosphate (ACP) has been prepared by using an aqueous solution containing CaCl2, (NH4)3PO4, and P123 at room temperature. The P123/ACP nanocomposite is used as the nanocarrier for hydrophobic drug ibuprofen, based on the combined advantages of both amphiphilic block copolymer and c...

Iron oxide magnetic nanoparticles were synthesized with different sizes (11 and 30 nm). Subsequently they shelled a silica layer allowing grafting of an organic phosphine ligand that coordinated to the [MoI2(CO)3] organometallic core. The was prepared by Stöber method using either mechanical (both 11 nm nanoparticles) or ultrasound (30 only) stirring. latter once coated obtained less aggregatio...

Amorphous calcium oxalate nanoparticles with sizes of ≈10 nm were synthesized at room temperature by hydrolysis of dimethyl oxalate from ethanolic solution.

Calcium carbonate is an abundant biomineral that is of great importance in industrial or geological contexts. In recent years, many studies of the precipitation of CaCO3 have shown that amorphous precursors and intermediates are widespread in the biomineralization processes and can also be exploited in bio-inspired materials chemistry. In this work, the thorough investigation of a urinary stone...