Carbonate system in the Cabo Frio upwelling.

The quantitative assessment of the carbonate system represents one of the biggest challenges toward the "Sustainable Development Goals" defined by the United Nations in 2015. In this sense, the present study investigated the Spatio-temporal dynamics of the carbonate system and the effects of the El Niño and La Niña phenomena over the Cabo Frio upwelling area. The physical characterization of the site was carried out through data on wind speed and sea surface temperature.

Inventory of water masses and carbonate system from Brazilian's northeast coast: Monitoring ocean acidification.

This manuscript presents an inventory of the carbonate system from the main water masses comprising the marine current system on Brazil's northeast coast (South Atlantic Ocean). For this purpose, four transects were conducted with an approximate length of 357 km (each one) through the platform and continental slope of the Sergipe-Alagoas sedimentary basin. Water samples were then collected in vertical profiles measuring from 5 to 1,799 meters depth, totaling 34 stations.

Aerosol dilution as a new sample introduction strategy for microwave-induced plasma optical emission spectrometry.

A new sample introduction method using aerosol dilution for microwave-induced plasma optical emission spectrometry (MIP OES) is presented. Signal emissions from N and OH species were monitored for plasma diagnostics and quantity of solvent plasma load (Q). The N/OH signal intensity ratio demonstrated that aerosol dilution is a desolvation process which can reduce the Q, increasing plasma energy.

Fabrication and characterization of remineralizing dental composites containing hydroxyapatite nanoparticles.

The aim of this study was to fabricate and characterize dental composites containing hydroxyapatite nanoparticles (HApNPs). Four dental composites were produced from the same organic matrix (70 wt% Bis-GMA and 30 wt% TEGDMA), with partial replacement of BaBSi particles (65 wt%) by HApNPs in the following concentrations (wt%): E0 (0) - control, E10 (10), E20 (20) and E30 (30). Ca and PO release was evaluated in solutions with different pHs (4, 5.

Effect of dentifrice containing fTCP, CPP-ACP and fluoride in the prevention of enamel demineralization.

Objective: To evaluate the effect of different fluoride- and calcium- and/or phosphate-containing products on their ability to prevent enamel demineralization under pH cycling conditions.

Material And Methods: Enamel bovine specimens were assigned to the following groups: G1-MPP (MI Paste Plus, 0.2% NaF, Recaldent™, GC Corporation Tokyo, Japan); G2-FD (Crest™ Cavity Protection, 0.