JBCS

Two methods based on mid and near infrared spectroscopy associated with chemometrics were developed to determine ethanol content in alcohol-based gel hand-sanitizers.

We demonstrate that a 3D printing pen (commonly used as a toy for kids) can be used to the fast drawing of low-cost electrochemical thermoplastic sensors in any desirable design using conductive filaments.

The figure presents a new hydrogel/gold nanorods system for the detection of streptavidin by specific interaction using the localized surface plasmon resonance (LSPR) phenomenon.

New 2,2':6',2"-terpyridines-derived Schiff base chemosensors (TPySSB) for the highly selective determination of Al³⁺ in ethanol.

Multi-walled carbon nanotube/zinc hexacyanoferrate (MWCNT/ZnHCF) battery electrode based on interfacial synthesis promotes intimate contact between the components with good electrical conductivity, and an increasing of eight-fold in the electrode capacity compared with ZnHCF electrode.

Acid hydrogen in the ionic liquid (IL) and the ability of the anion to carry out a hydrogen bond with arylamine are fundamental for the catalysis.

Norbornadiene derivatives, infested roots, nematode live and nematode dead.

The absorption values (λ_max) of synthesised dyes were not related to the polarity of solvents but instead to the proton-donor and acceptor properties of solvents, which reinforced the ionisation rather than tautomerism and they were more sensitive towards acids. The dyes may be in cationic and anionic form totally or partially in acidic and basic medium. The image shows the tautomeric structures and ionic forms of 1-phenyl-3-amino-4-(2-thiazolilazo)pyrazol-5-one.

Lupenone was isolated, for the first time, from Albizia inundata (Mart.) Barneby & J.W.Grimes by one-dimensional nuclear magnetic resonance. Extracts and lupenone from A. inundata showed antimicrobial (antibacterial, antifungal and antiparasitic) activities and, multi-element composition was evaluated using inductively coupled plasma optical emission spectrometry (ICP OES).

A series of 2-amino-1,4-naphthoquinone derivatives (NQA-NQF) was evaluated as potential antibacterial. NQF was identified as the most active compound against K. pneumoniae positive β-lactamase (minimum inhibitory concentration (MIC) = 31.2 µg mL^-1) and presented good parameters of interaction with human serum albumin (HSA).

The scanning electron microscopy image shows a magnetite crystal of natural origin. In the X-ray diffraction it is possible to visualize the crystalline transition of this magnetite at low temperature (15 K). Highlighted the evolution of the Verwey transition as a function of temperature and its change from cubic to monoclinic structure.

AuPd nanoparticles were immobilized onto a basic CoFe₂O₄-modified magnetic support and presented remarkable activity/selectivity on oxidation reactions.

This study presents a new electrochemical method for determination of trace metals (Pb^II, Cu^II and Hg^II) in struvite samples (natural fertilizer produced from urine). For this, we propose the use of square-wave anodic stripping voltammetry (SWASV) technique associated with electrochemically treated screen-printed gold electrodes.

Near-infrared/partial least squares (NIR/PLS) calibration developed to predict omega-3 and omega-6 in fillets of Nile tilapias packed under vacuum.

The work consisted of an analytical investigation, based on statistical concepts, to validate a model that described the viscosity of a polymeric polyethylene terephthalate (PET) solution.

Graphical abstract represents liquid-liquid extraction with low-temperature partition (LLE-LTP) and quick, easy, cheap, effective, rugged, and safe (QuEChERS) methodologies combined with high-performance liquid chromatography with diode array detector (HPLC-DAD) used in the present study for determining 2,4-dichlorophenoxyacetic acid (2,4-D) in water samples.

The dereplication of alkaloidic phase from Duguetia lanceolata performed by ultra-high performance liquid chromatography high resolution electrospray ionization tandem mass spectrometry (UHPLC-HR-ESI-MS/MS) and ¹H nuclear magnetic resonance (NMR) allowed the identification of eight aporphine alkaloids. Some fraction composed by alkaloids show antiparasitic activity.

Influence of four pyrazole-carboxamide derivatives in parameters growth of C. gloeosporioides BA3 in potato dextrose agar (PDA).

Ethanol extract from leaves of Cymbopogon nardus (citronella) contains phenolic compounds that exerted significant antifungal activity.

Underutilized lignocellulosic residues from the Brazilian juice processing industry as promising feedstocks in thermochemical processes.

Polyurethane by reacting 1,6-hexamethylenediisocyanate (1,6-HDI) with 2-monolaurin, which is the most abundant monoacylglycerol in the babassu oil, occurs by a concerted mechanism. The polymerization occurs by adding urethane monomer, instead of each of the co-monomer.

Brazilian monovarietal extra virgin olive oil: an unsupervised pattern recognition approach based on red, green and blue (RGB) channels and independent component analysis.