JBCS

The figure shows the initial formation of the micelle followed by the encapsulation of the monomer and finally its polymerization in the interior of the micelle by UV radiation.

The analysis evidenced that the chemical treatment was more efficient to remove the potassium oxide. The pozzolanic activity test and the kinetic parameters for the EGAas indicated that this ash is adequate for cement based composite.

Spatial and chemometric analysis of the distribution of metal species in soils of the Basin Middle Rio Negro, showed that proximity to urban areas is probably a variable that influences the organic matter content and metal species in flooded and non-flooded areas.

Absorbance signals obtained in the copper measurement by GFAAS in the extract obtained from extraction induced by emulsion breaking (A), in the direct introduction of emulsion (B) and in the extract obtained from the re-extraction of the oil (C).

This paper evidences the low and moderate removal efficiency of emerging microcontaminants by clarification treatment in natural waters with low and high turbidity using aluminum sulfate (SA) and polyaluminium chloride (PAC) as the coagulant.

Electrochemical and photo-electrochemical processes were used to degrade flumequine in aqueous solution: the drug concentration and the antimicrobial activity were reduced throughout the reaction time, and an intermediate with m/z 244 was identified.

This study assessed the activity of an immobilized enzyme to determine its potential utilization after the immobilization process.

A high-surface area activated carbon was prepared by chemical activation of lemon peel. The maximum adsorption capacity of Malachite green dye and Pb(II) ions were found to be 66.67 and 90.91 mg g^-1, respectively, at room temperature.

The exploratory analysis of the spectral data obtained by FTIR-HATR, extracted the information from different chemical blends biodiesel/diesel, allowing to identify the different concentrations, different transesterification routes and raw materials used in the process.

The fungus Fusarium oxysporum was used for the biotransformation of rice husk ash into silica nanoparticles. Glucose concentration, fermentation time and pH have an effect on the production of extracellular enzymes such as β-glucosidase and peroxidase.

Polyphenol-rich honey extracts prepared with Amberlite XAD-4 polymeric resin were analyzed using HPLC coupled with multivariate statistical analysis to detect possible biomarkers of their floral origin.

In this study, we demonstrate the anaerobic extracellular reduction of an azo dye. Color removal was enhanced by the presence of yeast extract, which is an inexpensive source of the redox mediator riboflavin, and the optimized reductive conditions were established by multivariate experimental design.

The frontier orbital energy of α,α-ditert-butyl-4H-cyclopenta[2,1-b,3;4-b']dithiophene (DBDT) and α,α-ditert-butyl-5H-cyclopenta[2,1-b,3;4-b']dithiophene S-oxide (DBDTO) bridged with CH₂, C=S, and C=O revealed that the C=S and C=O bridge destabilized the HOMO, lowering the band gap.

Nanoparticles prepared from zein were used for encapsulation and release of terpinen-4-ol, a therapeutic agent for the treatment of melanoma. The optimized system has the potential for use in anti-melanoma therapy considering that it offers sustained delivery.

The essential oil of Siparuna guinansis Aublet, a characteristic plant of the Brazilian cerrado, has medicinal applications and ethnobotany. Infrared spectroscopy is one of the methods used to qualitatively characterize the molecular structure of compounds for the development of new products.

This paper reviewed the following regarding the steam reforming of ethanol: new catalyst design, catalyst stability and new technologies in the reactor configuration.

The use of renewables for obtaining energy and chemicals is a prerequisite for sustainability and Brazilian agro-industrial wastes are still unexplored, but they open up infinite possibilities, which include the hydrogen production by anaerobic fermentation.

A review on the occurrence of quinolones in environmental matrices, the degradation of these compounds by conventional and advanced oxidation processes, including a discussion about intermediates and residual antimicrobial activity, was conducted.

The stability constants of the 1:1 complexes formed between M²⁺ (M²⁺: Mn²⁺, Ni²⁺, Cu²⁺, or Cd²⁺) and BMADA^2- (BMADA: 2,2'-(5-bromo-6-methylpyrimidine-2,4 diyl)bis(azanediyl)dipropanoic acid) were determined by potentiometric pH titration in aqueous solution. In the M-BMADA complexes, the M ion is able to form a macrochelate via the pyrimidine group of BMADA.

GC-MS/MS and QuEChERS based method were employed to optimise a rapid and easy sample preparation method for the determination of different pesticide residues in milk. This method could be implemented in many laboratories to reduce inspection time and cost.

The image shows the interactive process mediated by the language. The people involved in the pedagogical relation interact by the language use, which acts as a mediator in the knowledge meaning process in the classroom.

The use of percolator is more accurate method than the Siwoloboff's technique for determining the boiling point of organic compounds.

A paper about Brazilian textbooks of Chemistry from XIX century to 1930. A revision of literature is made, as well as an analysis of some of these prime textbooks.