JBCS

Volatile profile and use of paper spray ionization mass spectrometry for rapid analysis of cagaita (Eugenia dysenterica) ice cream.

In past decades, energetic materials attracted much attention for their implication in the military and civilian field. Therefore, difluoroamino substituted prismane is designed and characterized in this paper. Finally, the derivatives with more than three substituent groups are confirmed to be potential high energetic compounds.

Nitrate to nitrite reduction using aluminum spheres coated with a copper film (Al-Cu) and quantification using the Griess-Ilosvay reagent, an alternative to the reduction with cadmium.

The incorporation of the rhodamine B into poliamide pieces obtained by Additive Manufacture at lower concentration at different pH, is not affected the spectroscopic properties of the dye, and can be applied as luminescent sensors and random lasers.

Mean and standard deviation values of atomic charges computed by Mulliken, MBS, Chelp, Chelpg, MK, Hirshfeld, NPA, AIM and DMA methods for the atoms of the indicated molecule.

With the combination of semiempirical, DFT and QTAIM methods it is possible to understand chlordecone adsorption process on activated carbon at different pH and solvation conditions, in order to optimized activated carbons synthesis.

Analytical method using portable X-Ray Fluorescence was optimized for direct determination of phosphorus in archaeological sediment samples of the Serra da Capivara National Park, Piauí, Brazil.

Fast sequential determination of nine trace-metals in biodiesel samples was carried out with microemulsions as sample preparation. Biodiesel samples from different sources were analysed by high-resolution continuum source flame atomic absorption spectrometry.

Gamma-hydroxybutyrate (GHB) is a depressant drug used as Drug-Facilitated Crime (DFC) and urine is the biological matrix of choice for toxicological analysis involving DFC. A simple and ultra-fast methodology for GHB determination in urine samples by GC-MS was developed.

This work describes the development of a simple experiment with easily accessible and low cost materials, enabling its practice with or without laboratory infrastructure, with feasibility for experimental theoretical study.

The presentation of orbitals in General Chemistry has been debated for many years. We review previous arguments for and against the teaching of orbitals in this paper.

An educational introduction to the subject of neural networks is presented as a tool for non-linear regression, by an application in potential energy surfaces.

In honor of the work developed by Huisgen, in this review we provide an overview on the applications of 1,3-dipolar cycloaddition reactions for the preparation of five-membered heterocyclic compounds, starting with the seminal examples in the field and further discussing the most recent applications.

The chemist Wilhelm Ostwald had for a long time his scientific contributions eclipsed by his rejection to atomic theory. It is time to understand his role for chemistry, highlighting his chemical investigations as well as his efforts for spreading physical chemistry.