JBCS

This work investigated the pyrrole electropolymerization on aluminium from phosphoric acid solutions. A mechanism is proposed to explain the protection of aluminium against corrosion by PPy coating in chloride medium

Uncertainty estimation is essential to ensure metrological traceability of measurement results to the International System of Units (SI). The application of the Monte Carlo method, an alternative approach to the traditional method (GUM), is demonstrated for uncertainty estimation of captopril and metronidazole mass fractions in two new certified reference materials (CRM)

Polymerization with the cross-linker in the presence of the complex using an initiator, and subsequent removal of the template to yield a substrate binding pocket complementary to the polymer

Herein, we investigated the interactions of four ß-lactam antibiotics belonging to two classes (cephalosporins and penicillins) with human serum albumin (HSA) by ¹H STD NMR (saturation transfer difference nuclear magnetic resonance spectroscopy) reveling that the interaction between the aromatic moiety and HSA is responsible for the binding efficiency

Arrabidaea chica (crajiru) is an important Amazonian plant that is used as antimicrobial agent. Direct infusion was used to differentiate three distinct varieties via electrospray ionization mass spectrometry (ESI(+)-MS) fingerprinting. 3-Deoxyanthocyanidin cations were used as markers in the PLS-DA (partial least squares-discriminant analysis) data treatment

The structural and electrical behavior of three Ta_xMo_1-xS₂ phases and their intercalation products with lithium, pyridine and poly(ethylene oxide) were studied and characterized by means of X-ray powder diffractometry (XRD), thermogravimetric and differential thermal (TGA/DTA) analyses, energy dispersive X-ray fluorescence (EDX) and field emission-scanning electron microscopy (FE-SEM) techniques. The electrical conductivity was measured under a 9 T magnetic field in order to verify the occurrence of magnetoresistivity phenomena

The figure shows the micrographs of the thermoplastic starch film with 30% of PLA (M3030), not treated (a) and treated (b) with chloroform, where the phase domains can be observed

Certified reference materials (CRM) can ensure metrological traceability of measurement results to the international system of units (SI). The certification procedure includes material characterization, homogeneity and stability studies, and uncertainties estimation, as exemplified for the metronidazole CRM, second Brazilian CRM of an active pharmaceutical ingredient (API)

Selective LC-MS compatible stability indicating method was developed and validated. Degradants were characterized by LC-MS/MS. Fragmentation pattern and mechanism of degradation was established for hydrochlorothiazide

Validation of a simple and sensitive method for quantification of autoantibodies to annexin V in plasma with high reproducibility and reliability. Calibration curves for IgG and IgM isotypes were obtained by plotting optical density vs. concentration of the calibrators used (5, 15, 30, 40 and 80 U mL^-1) in a semilogarithmic scale

The Klebsiella oxytoca bacterium was used as a test organism in toxicity evaluations of metals (Hg²⁺, Cd²⁺ and Cu²⁺) and detergents (Laborhex 2 and Riodeine Degermant). The inhibition of bacterial growth was quantified by flow injection analysis (FIA) via conductometric measurements of the CO₂ produced during respiration

A validated RP-HPLC method developed for the simultaneous quantification of ursolic acid (UA) and ursolic acid lactone (UAL) in the leaf extract of E. tereticornis with excellent precision, accuracy, linearity. This method can be routinely used for the analysis of UA and UAL in the extracts and formulations containing E. tereticornis leaves

The effect of pH upon the retention of mesalamine (5-aminosalicylic acid) on the Ni-Al (NO₃^-) layered double hydroxide as a nanosorbent in solid-phase extraction system is shown. The highest extraction efficiency was achieved between pH 4 and 9

Structures of new phytoceramides and the most cytotoxic compound (saponine) isolated from Ficus glumosa (Moraceae)

Pyrohydrolysis was employed for mineral supplements decomposition prior to F, Br and I determination by potentiometry (F) and inductively coupled plasma mass spectrometry (Br and I)

Volatile organic compound (VOCs) emissions from a landfill soil. Sampling with flow chamber method with later plume dispersion modeling and impact on tropospheric ozone formation

The influence of different anions and their concentration on the characteristics of ZnO electrodeposits were studied in dimethylsulfoxide (DMSO) medium. Changes in the nucleation and growth mechanism during the electrochemical process are directly related to the electrolytic solution composition

Representation of critical points of the PES of the first step of the nucleophilically unassisted solvolysis of protonated 2-endo- and 2-exo-norbornanol as optimized geometries (1-GS, 2-GS, 2-norbornyl cation and water) and molecular graphs (1-TS and 2-TS)

The lipophilic character of twelve coumarins was investigated by reversed-phase thin-layer chromatography (RP TLC) on RP-18 silica. Two lipophilicity parameters (RM0 and log POW) together with 2D molecular descriptors were subjected the multivariate statistical analysis (principal component analysis (PCA) and partial least square (PLS) regression) in order to reveal the most influential factors governing the retention, i.e., lipophilicity of the investigated compounds

Layer-by-Layer films from chitosan and poly(vinyl sulfonic acid) deposited onto Nafion^r membranes for direct methanol fuel cells, targeting the reduced methanol crossover and the avoidance of significant increase in the proton resistance

Deep-sea fossil coral sample, Lophelia pertusa, taken from Campos Basin sediment cores. These fossils coral occur buried in the sediments as a sequence of appearance/disappearance, ages on the range of 9 to 202 kyears were obtained applying ²³⁰Th/²³⁴U and ¹⁴C dating

Figure shows the steps for determining TiO₂ in toothpastes, after the calibration model is ready to be used. Figure translates associated aspects of the developed method as a green chemistry strategy, with minimal sample manipulation and high sample throughput

This article describes the preparation and application of plurimetallic catalysts that can be applied in direct ethanol fuel cell. The effect of mixed catalysts in the efficiency of oxidation of ethanol in fuel cell operation conditions is discussed

Correlation between chain length, electron density and anodic potential

A dilute-and-shoot procedure for trace element determination in bovine semen samples by inductively coupled plasma spectrometry (ICP-MS)