JBCS

The catalyst 7.1WN/A was the most active and selective (94%) for the (Z)-alkene at 323 K. The selectivity of the catalyst compared favorably to that of the classical and more expensive Lindlar catalyst.

Silver carbonate efficiently promoted the glycosylation of cyclohexanol with peracetylated N-phtaloyl-α-D-glucosaminyl halides as compared to other promoters: silver trifatle and Mercury (II) bromide/mercury (II) oxide. The reaction did not work with three other glycosyl donors.

The addition of composted pig slurry, even in small amounts, to a sandy Acrisol affects the soil organic matter. As a consequence, the distribution of the humic fractions is altered, with an enhancement of humic acid micelles.

We report excellent antibacterial activity of organotin(IV) esters. The tendency for inhibition was found to be stronger against E. coli than other bacterial strains. Insecticidal toxicity was also determined.

Optical micrographs of petroleum before (a) and after (b) asphaltene precipitation as a function of volume of n-heptane added.

This work isolates the compound 3',4',5-trihydroxy-6,7-dimethoxyflavone (cirsiliol) from the leaves of the cultivated Leonotis nepetifolia, and evaluates in vitro the crude ethanol extracts and phases with respect to their potential antimicrobial, cytotoxic, and antitumoral activity.

Eugenia species, widely dispersed in the cerrado, were investigated and study results indicate that their leaf essential oils feature notable amounts of α- and β-pinene, limonene, bicyclogermacrene, β-caryophyllene, spathulenol, and globulol, which exhibit acaricidal activity against T. urticae.

Schematic illustration of co-poly(L-lysine)-graft-(ε-N-[X-D-biotinyl]-L-lysine).

The title compounds were prepared by nucleophilic aromatic substitution of 2,4-dinitrochlorobenzene followed by regioselective reduction using stannous chloride suspended in EtOAc. The reduction products were characterized as the acetamide derivatives.

Acridone alkaloids inhibit the enzyme cathepsin L as reversible competitive inhibitors with respect to the substrate Z-FR-MCA.

The application of ionic liquids (IL) as sorbent materials has proven highly successful in chemistry mainly due to their unique chemical and physical properties. As stationary phases in gas chromatography (GC), IL exhibit a multitude of requisites to provide highly efficient separations, namely, high thermal stability, negligible vapor pressure, and unique solvation properties.

A spectrophotometric method was developed and validated for determining the microencapsulation efficiency of palm oil by complex coacervation.

An assay was developed for use in petrol stations to determine the presence of biodiesel in diesel-biodiesel blends based on the visual observation of significant coloring of the products.

The identities of the basic education teacher, higher education professor and bachelor's degree in chemistry/researcher circulate during a person's undergraduate degree, and the motivation to take on one of the identities depends on intrinsic and extrinsic factors affecting students and professors.

Low-cost teaching experiments that obeyed the principles of Green Chemistry were developed. Copper electrogravimetry experiments were used because visual changes may be easily observed, thus facilitating the didactic exploration of gravimetric and electrochemical concepts.

The electronic spectrum of the I₂ molecule is calculated using scientific computing tools.