JBCS

Silver nanoparticles can act against ticks or against major pathogens transmitted by the bite of ticks such as bacteria, viruses or protozoa with equal or better efficacy of antibiotics, antiviral or antiparasitic agents.

This review presents the structures, biological activities, biosynthesis, and syntheses of the sesquiterpene alkaloids, principally the dendrobine and guaipyridine groups.

This paper is part of the PubliSBQ Special Issue in honor of the late Prof Angelo da Cunha Pinto.

The sol-gel methodology affords materials with useful properties for application in biological medium. Additive manufacture is an effective technology to produce complex macrostructures. In combination, sol-gel and additive manufacture produce materials with new properties for various applications.

Dopamine loaded MNPs were used as an electrostatic sorbent in magnetic solid phase extraction for separation of ochratoxin A.

Gold nanoparticles were rapidly synthesized by using laccase in alkaline medium at ambient conditions, and exhibited high catalytic stability for the reduction of 4-nitrophenol to 4-aminophenol in the presence of NaBH₄.

In tube ultrasonic and air assisted liquid-liquid microextraction IT-UAA-LLME) method, was developed for the preconcentration of some phthalate esters, prior to their determination using gas chromatography mass spectrometry.

Synthesis and application of NMR and molecular modeling to confirm the complete structure and the non questionable chemical shift assignment of these products.

Reusable layered zinc n-octanoate was employed as catalyst in the esterification of octanoic acid with isopropanol, providing high acid to ester conversions.

This is an efficient method of direct extraction/incorporation of antioxidants from oregano and ginger in canola oil using a green extraction process, which is safe for health and contributes to environmental sustainability.

The cyclodepsipeptides beauvericins and bassianolide were identified from the Beauveria bassiana extracts. These extracts showed larvicidal activity on 3^rd instar of Aedes aegypti.

Nine diterpenes, including five unknown diterpenes derivatives, were isolated from the aerial parts of cultivated specimens of Plectranthus ornatus. All compounds were assayed against the four human cancer cell lines, and Gram-positive and Gram-negative bacteria strains.

A screening was carried out and several strains of marine-derived fungi were able to reduce isatin and produced the enantioenriched dioxindole, up to 66% ee and with different conversions (11-98%).

This paper is part of the PubliSBQ Special Issue in honor of the late Prof Angelo da Cunha Pinto.

The aim was to develop a dissolution test for fenbendazole-praziquantel capsules and an UV-PLS method for its evaluation.

A semi-preparative chromatography application and stacking injection for purification of drugs with high efficiency and lower consumption of solvents associated with liquid chromatography-multistage mass spectrometry (LC-MSⁿ) and liquid chromatography-solid phase extraction-nuclear magnetic resonance (LC-SPE-NMR) techniques for structural characterization of impurities.

Study on formation of GSH conjugation reaction of Mannich bases of 4'-hydroxylchalcones by RP-TLC, RP-HPLC and RP-HPLC-MS methods.

Synthesis of a novel asymmetric porphyrin based on cardanol.

The study presents the development of a drug delivery system and validation of a simple and rapid high performance liquid chromatography method for the characterization of two chalcones in Eudragit^® RS100-based microparticles

Determination of pesticides in river water, estuarine, seawater and weir water using standard surrogate and relation factor by solid phase microextraction gas chromatography with flame ionization detector (SPME-GC-FID).

PtSn/C (3:1) electrocatalyst for mixed solutions EtOH:MeOH oxidation can result the formation of CO₂ at low potentials, as well as the highest amount of by-products than ethanol and methanol.

The idea of pure hydrogen production and storage in iron and germanium based double chemical looping process.

Our work with natural diterpenes from Copaifera oilresin led to derivatives with remarkably increased anti-tubercular activity. Derivatives were obtained through synthetic structural modifications and their activities reached two, five and twenty-fold compared to natural precursors.

Seventeen compounds were found associated with the presence of the Monascus fungus (in vivo solid phase microextraction (SPME)), the main being ethanol, 2-methyl-propanol, 3-methylbutanol, 2-methylbutanol and 2-phenylethanol, such compounds have been studied by empirical models.

Opposite to Pt, on PdRuRh catalysts CO₂ is produced earlier than oxalic acid, and there is no self-inhibitory effect when EG concentration is increased.

One new isoflavone, in addition to two known ones were isolated from the leaves of Vatairea guianensis Aubl. (Fabaceae). The extract, AcOEt fraction and two isolated compounds exhibited antifungal activity through in vitro testing.

An expeditious and green synthesis of acetamides is described in good yield without external heating, and with simple purification.

This paper is part of the PubliSBQ Special Issue in honor of the late Prof Angelo da Cunha Pinto.