JBCS

Capsaicin, piperine, gingerol and other pungent natural compounds are technologically developed bioproducts for civilian's self-defense proposes.

This study presented the development of a fast and accurate method for determination of L-ascorbic acid (L-AA) in different milk samples (raw and processed). In the sample preparation, a low toxicity organic solvent was used in the degreasing and deproteinization step, avoiding L-AA oxidation.

This is the first report distinguishing para-naphthoquinones, ortho- and para- furanonaphthoquinones by one and two-dimensional techniques of nuclear magnetic resonance (NMR).

The phase I and II metabolism of methasterone, a designer anabolic steroid prohibited for athletes and monitored by anti-doping laboratories, were studied by chromatographic techniques using human urine samples. One new metabolite is shown: 17β-hydroxy-2α,17α-dimethyl-5β-androstan-3-one, obtained from the epimerization at C5

The affinity between the Zn²⁺ and Ni²⁺ metal cations and 1,2-dithiolene ligands was quantified from the substitution energies and rationalized through energetic, electronic and geometric parameters.

Synthesis, physicochemical characterization and leishmanicidal activity of the layered double hydroxide (LDH)-ferulate anion (FER^-) intercalation compound, a potential drug delivery vehicle for potential treatment of cutaneous leishmaniasis without any side effect.

Useful synthesis of pyrrolo[3,4-d]pyridazin-1-ones by sequential N-alkylation, CuAAC and [4 + 2] cyclocondensation reactions.

In situ deep eutectic solvent liquid-liquid microextraction method was developed as a sample preparation method for the detection of parabens. The deep eutectic solvent, formed in situ by the DL-menthol and decanoic acid, was used as the microextraction solvent.

Disposable pipette extraction (DPX)-based procedure was fully optimized for determination of multiclass of pesticides in 20 drinking water samples by high-performance liquid chromatography coupled with diode array detection (HPLC-DAD).

A novel electrochemiluminescence sensor for highly sensitive detection of Ag⁺ is developed based on the sensitive "turn-on" three-way junction of deoxyribonucleic acid (DNA).

A fast, easy and efficient analytical method based on a modified quick, easy, cheap, effective, rugged and safe (QuEChERS) method and ultra-high performance liquid chromatography tandem mass spectrometry (UHPLC-MS/MS) analysis was developed and validated for the determination of phenolic compounds in red sweet pepper.

The asphaltenes precipitation onset point of crude oil samples that do not have well-defined curves can be ascertained by adding a solution of toluene containing an additive.

The fast acidification promoted by a discharge in nitrogen-based gas phase interferes in the nanoparticles (NP) formation; hydrated electrons induced by an electrochemical discharge are competitively consumed through scavenger reaction (silver reduction) and through the second-order recombination reaction; fact that could only be perceived for discharge in the helium because NP formation and basification are simultaneously observed.

Stable CdTe nanocrystals were prepared in a single step route onto the surface of layered double hydroxide as modifier to carbon paste electrodes.

Induced and pre-formed mechanism defense of Annona muricata against Meloidogyne javanica were detected by nuclear magnetic resonance (NMR)-based metabolomic analysis.

The image represents liquid-liquid extraction with low-temperature partition (LLE-LTP) methodology combined with high-performance liquid chromatography coupled a diode array detector (HPLC-DAD) used in the present study.

In the present study the reduction reaction of Fe^III to Fe^II in aqueous solution containing 2,2'-bipyridine (pH 4.6; acetate buffer) was used as an alternative spectrophotometric method to measure the total reducing capacity of teas and herbs. The method suggested here is fast, simple, reliable and easy to perform.

A new nanocomposite based on ZnCdTe semiconductor nanocrystals synthesized in situ on reduced graphene oxide (rGO) was obtained. The modified electrodes were prepared and successfully applied for the determination of carbendazim in orange juice samples.

Open-source device based on Arduino for separation of porphyrins fractions from crude oil is presented and successfully tested.

This paper deals with the interaction between Sr(OH)₂ and CoFe₂O₄ and their role in the oxidation reaction of benzyl alcohol with gold nanoparticles.

Short-chain fatty acids (SCFA) are enteric end-products essential to health. Quantification of SCFA in a small amount of mice feces sample is a big challenge. We developed, validated and applied a method based on capillary electrophoretic with indirect ultraviolet detection for determination of SCFA in mouse feces to evaluate the effect of the consumption of aqueous extract of jabuticaba on mice with induced colitis.

This paper describes the microwave-assisted synthesis of thirteen functionalized peptoids and evaluates their in vitro antileishmanial activity against Leishmania (Leishmania) amazonensis promastigotes.