JBCS

The presence of selected metals in tissues of G. cruentata can represent a potential human health risk to the consumer.

Differential scanning calorimetry (DSC) was demonstrated to be a helpful tool to determine the light crude oil (LCO) fraction in biodiesel/LCO blends. DSC results were validated with nuclear magnetic resonance (NMR).

Antinociceptive potential of the essential oil obtained from fresh Myrcia rostrata DC. leaves evidenced by the reduction in the number of abdominal writhes induced by acetic acid in mice.

Soil substrates must exhibit physical and chemical properties in such way that a high capacity to supply the nutritional demand can be guaranteed, taking into account environmental standards.

Spectral changes due to the isomerization of mercury dithizonate(II) in PMMA at 298 K.

Filmogenic solution was obtained by stirring the lemon essential oil on the Turrax stirrer and adding gelatin powder in the nanoemulsion to form the films.

The Velhas River contains high amounts of arsenic and metals in water and sediment samples. BCR method was used to investigate its bioavailability in the sediment. All sediments samples presented As and metals associated with easily mobilized fractions.

Immobilization of HRP on sugarcane bagasse by physical adsorption (ADS) and covalent bond (LC) on activated support by 2.5% (v/v) glutaraldehyde (GA).

Hydrometallurgical process for printed circuit boards from cell phones using HF + oxidant mixtures under mild experimental conditions. Lead and noble metals were recovered from the insoluble matter.

This review covers some recent work by using Nickel catalysis. In this context, challenged organic transformations, synthetic applications and mechanism investigations are described.

Alluvial gold mining dredge on the Madeira river. The gold extracted by the dredges is taken to the city of Porto Velho for commercialization, where the its smelting and Hg exposure occurs in the atmosphere of specialized stores.

Factorial design: use of free software and videos for better data interpretation.

In this article we discuss the space of Chemistry in Brazilian science centers and museums through a documental survey conducted by telephone, mail and analyzing the websites of those places.

Top Figure: Potential energy for A ⇆ B reaction. Bottom Left Figure: Transitions between states A and B. (i) Ehrenfest urn model (Urns A and B) randomly defines the collision between molecules; (ii) Monte Carlo method (P_AB and PP_BA: Metropolis Update) defines the transition probabilities. Bottom Right Figure: A tipical results for 10² samples.

Students using mass spectrometry to check if the oils were adulterated with soybean oil. An investigative approach to learning mass spectrometry and other fundamental concepts of chemistry.