JBCS

Pt-It/C nanowire catalysts were successfully synthesized with different metallic composition and were all more active towards ethanol oxidation than the commercial Pt/C catalyst, and are promising for application in direct ethanol fuel cells.

The objective of the work is to modify nanostructured semiconductors of Ti/TiO₂ with copper oxide for application in the photoelectrocatalytic conversion of CO₂ and biogas in fuel products of energetic interest.

Biomass-bound lipases from fungal organisms may exhibit hydrolytic, synthetic and enantioselective activity - useful capabilities for many important applications in biocatalysis.

Samples of gasoline, ethanol and diesel were collected at gas stations at ES state and analyzed by portable NIR, ¹H NMR and photometry in order to verify the efficiency of the techniques in detect adulteration.

Reuse of waste from the processing of fish to produce composite artifacts.

Analytical method based in QuEChERS was optimized and validated to be used for analysis of real cosmetic samples. The results showed that QuEChERS can be used for determination of some preservatives in cosmetic matrix.

Phytochemical study of aerial parts from Sinningia mauroana (Gesneriaceae) yielded 17 known compounds, which are been reported for the first time in the species. Additionally, the antimicrobial, antioxidant and cytotoxic activities of its extracts were investigated.

We report on the study of the spectroscopic properties in Ytterbium-Terbium (Yb³⁺-Tb³⁺) co-doped calcium lithium borate (CaLiBO) glasses, with the study's focus being on the upconversion process. Our results showed that a cooperative energy transfer (CET) from two Yb³⁺ ions to one Tb³⁺ ion is the origin of the Tb³⁺ upconversion luminescence in the visible region.

Nitrosyl ruthenium complexes containing 2,2'-bipyridine and phen = 1,10'-phenanthroline ligands presented antibacterial action against Pseudomonas aeruginosa.

Allamanda cathartica L. flowers were collected in different locations in the state of Santa Catarina, Brazil. Extractive solutions were analyzed by HPLC-PDA. In order to investigate the similarity of the samples, PCA and HCA analysis were performed.

The natural organic matter of the waters of the lagoon estuarine complex Mundau-Manguaba presented high affinity with Hg²⁺ ions and humification/aromaticity dependent on the characteristics of lagoons.

Whole powder milks were analyzed by scanning electron microscopy and particle size analysis. By statistical analysis a more modern rehydration index was developed as a complement to the technique that is usually used to determine powders rehydration.

An experimental propose using flowers extracts: The picture shows the flowers used to extract the dyes in presence of H⁺ and OH^- ions (indicating the tests done in aqueous solutions).

Organizational representation of study periods and discussion groups. Students: white circles; teacher: black circle and monitor: gray circle.

The equation of propagation of uncertainty is a simple and powerful equation that chemists should apply wisely and more often.