JBCS

The experimental design tool was used to evaluate the contribution of temperature, solvent and base in the development of a new catalytic system for Sonogashira cross-coupling using NCP pincer palladacycle 1.

Optimized geometry at B3LYP/6-31G(d) level of theory of oligomers H-TAZ₍₄₎ and CN-TAZ₍₄₎. The spheres represent atoms of: Nitrogen (Blue), Carbon (grey) and Hydrogen (white).

Four curves were obtained for barium in different base oils, showing the matrix effect in some cases yet not in others.

Pesticides are used mostly in rural areas for agriculture, but urban pest control, public health campaigns, and household and veterinary products can also be important sources of these contaminants to aquatic environments.

Aluminum phthalocyanine chloride (AlPcCl) is a hydrophobic photosensitizer (PS) which tends to self-aggregate in aqueous media. In this work, the interaction of AlPcCl with micellar copolymers of Pluronic^TM P-123 and F-127 was studied.

The phytochemical investigation and evaluation of the phytotoxic effect of the leaves of Annona nutans were performed. Flavonoids and polyketide derivatives were identified as well as phytotoxic activity of chloroform fraction.

Simple linear regression between experimental and theoretical δ_C (B3LYP / ccpVDZ)of compounds 1, 2 and 3. Data of compounds 2 and 3 were displaced in the y axis of the graph at 30 and 60 ppm, respectively.

The figure illustrates the chemical bonds resulting from crosslinking of polymer that contribute to adhesive performance.

This Graphical Abstract shows a drawing of the electrochemical reactor (Spoutedbed electrode), the current efficiency obtained from the experiments, and SEM images of the particles before and after the electrowinning process.

Fast and simultaneous determination of sulfamethoxazole and trimethoprim using batch injection analysis (BIA) with multiple pulse amperometric detection (MPA).

Cyclic Voltammogram of Pt(hkl) in 0.1 mol L^-1 perchloric (red line) and sulfuric acid (black line). Scan rate: 50 mV s^-1.

This work discusses the basic physico-chemical aspects related to the liquid phase synthesis of rare earth-based inorganic nanomaterials, with a brief survey of the classical and recently-developed techniques involving coprecipitations, hydro(solvo)thermal treatments, and reactions in microemulsions.

This study presents a critical evaluation of the concepts and procedures defined in the validation and analytical quality control guide called the "Guia de Validaçao e Controle de Qualidade Analítica - Fármacos em Produtos para Alimentaçao Animal e Medicamentos Veterinários" (MAPA, Brazil).

A HPLC-PDA method was developed and validated for the preliminary stability study of synephrine in Citrus aurantium dry extract.

Two simple, rapid and cost-effective spectrophotometric methods were developed and validated for the assay of diethylcarbamazine citrate (DEC) in bulk form and formulations. The methods are based on the charge-transfer (CT) complexation reaction involving DEC as the n- donor and 2,3-dichloro-5,6-dicyano-p-benzoquinone [DDQ] (method A) and 2,4-dinitro phenol [DNP] (method B) as π-acceptors in chloroform.

Information on the nature of oscillatory behavior in valve metal anodization at constant current was investigated using high temporal resolution measures obtained with a low-cost setup.

An undergraduate organic chemistry experiment based on thermal cracking of glycerin is proposed. Glycerin is obtained as a by-product from the practice of biodiesel synthesis, and allows reduction of waste produced in the lab.

Exercises on how to choose the active space for a multiconfigurational calculation.

Evolution of the centrifuge and of filter paper over the past 100 years.