JBCS

Polyacrylonitrile (PAN)/polyvinyl alcohol (PVA)/TiO₂ (PPT) beads structure and removal of methylene blue (MB) under visible light irradiation.

Uranium concentrations higher than the Brazilian regulatory limits were observed in several groundwater wells in the mountainous region near Rio de Janeiro City. Clear water does not mean uncontaminated water.

Copaiba oil-resin loaded into self-nanoemulsion drug delivery systems (SNEDDS) were obtained in order to improve the solubility and bioavailability of this natural oil.

Extraction of volatile organic compounds from acerola fruits through the use of different solid phase microextraction (SPME) fibers.

The leather industry has significant economic influence; however, it suffers from the negative impact due to environmental pollution caused by tannery wastes produced during leather processing.

2D and 3D molecular descriptors were calculated, selected and used to build quantitative structure-activity relationship (QSAR) models to predict the herbicide activity of a set of nostoclide analogues (experimental data retrieved from the literature). The models were interpreted to understand the ligand-receptor interactions.

Given a dataset, first, use maximum information coefficient (MIC-filter), support vector regression backward elimination (SVR-BE) and minimal redundancy maximal relevance (mRMR-MIC) to select features. Second, use the multiple linear regression (MLR), partial least square regression (PLS) and support vector regression (SVR) to build quantitative structure activity relationship (QSAR) models.

Nine simple polyoxygenated chalcones were synthesized to evaluate their antimicrobial, anti-inflammatory and antioxidant activities.

Oxygen evolution reaction (OER) on nickel wire with nickel oxyhydroxide layer.

The evolution of the iron hydroxide to produce mesopores containing [FeO_x(OH)_y] surface sites capable of complexing the amoxicillin molecules.

Strategy for fast determination of iodine number of biodiesel samples by capillary zone electrophoresis (CZE). Low sample amount (mg), reactant (µL), and organic solvent (µL) are required.

Chrysotile:cement sheets were milled with K₂HPO₄ and the amorphous mixture, free of fibers, presents a potential fertilizer and soil conditioner behavior.

Two natural diterpenes were evaluated against multi-drug resistant (MDR) Gram-positive bacteria and were converted into 28 semi-synthetic derivatives. Both natural compounds displayed interesting activity overall, but not so good against Staphylococcus aureus, a relevant multi-resistant pathogen. The activities of all derivatives were determined what revealed one with good overall activity and with a noteworthy activity against S. aureus. All other results could further clarify some structure-antimicrobial activity relationship questions about diterpenes.

Methyl esters and alkaline catalysts are adsorbed on the surface of the methanol oil, favoring the dispersion of the methanol in the oil phase. The adsorption of potassium is greater than that of sodium.

Simple and rapid analysis of commercial oils by direct injection electrospray ionization mass spectrometry (DIMS) and identification of adulteration in olive oil.

Catalytic cracking of soybean oil for biofuel over γ-Al₂O₃/CaO composite catalysts was conducted in a fixed-bed reactor. The biofuel showed similar chemical composition and fuel properties (low acid value and high calorific value) with the petroleum-based fuel due to the acid-base characters of γ-Al₂O₃/CaO composite catalysts.

In this study, frequency domain techniques are used to examine electron transport and dye recombination in natural dye sensitized solar cells.

Conditions optimization of extraction of volatile compounds from fruit of Eugenia dysenterica using different solid-phase microextraction (SPME) fibers.

Analysis of the chemical composition of the attractants and floral resources available in T. odorifera provided a broader understanding of the mechanisms responsible for plant-insect interactions.

Procedure of benzo[a]pyrene (BaP) quantification in cachaças using PARAFAC to overcome the interferences.

Two new polyunsaturated 3,4-epoxy-heneicosane derivatives named as epoxy-lobophorene A and B were isolated from the brown alga Lobophora variegata and presented a moderate antiproliferative effect against tumor cell lines.

Soil carbon stocks and organic matter composition (assessed by ¹³C NMR spectroscopy) in an Acrisol under native Amazon Forest and natural regeneration or pasture cultivation after native Amazon Forest slash-and-burn, which emitted 74 Mg ha^-1 of carbon to the atmosphere.