JBCS

Novel packagings produced with polysaccharides and papaya's puree, improved with chitosan nanoparticles. A way to decrease environmental impact caused by disposal packaging that are difficult to degrade.

Biodegradable films produced by blow-extrusion of starch, PBAT, and nanoclay. The blended materials were initially pelletized in a single-screw pilot extruder, followed by subsequent extrusion of the pellets to form films.

The sediment humic substances showed influences the complexation of metals by influencing their bioavailability for the aquatic environment.

Steps for obtaining the adsorption isotherms of α-la in hydroxyapatite and their values of q_m as a function of different pH and temperature values.

The chemical kinetics of sugarcane filter cake (FC) organic matter degradation in soil with different levels of cadmium (Cd) contamination was studied by quantifying CO2 emitted during 72 days of incubation. The total CO2 emitted from FC decreased with Cd contamination.

A method based on microwave-induced combustion (MIC) was applied for decomposition of different edible seaweed for subsequent determination of bromine and iodine by inductively coupled plasma mass spectrometry (ICP-MS).

Lipase from Burkholderia cepacia immobilized by encapsulation in silica matrix modified with protic ionic liquid and dried in pressurized media (aerogel) shows attractive potential for industrial applications in the hydrolysis of vegetable oils.

Sulcatyl acetate (6-methyl-5-hepten-2-yl acetate) was isolated for the first time from Aristilochia trilobata and identified as the major component of volatile compounds.

Polyurethane pre-polymer technology applied in the aerospace area. Used as a binder like a solid fuel in hybrid propulsion. Soybean-based polyol was the best starting raw material in the synthesis of polyurethane network.

This figure shows the growth inhibition of Rhizoctonia solani by phosphorohydrazidic acid N'-[1,2-dihydro-1-methyl-2-oxo-3H-indol-3-ylidene]-dibutyl ester (12).

In this work, a rapid and simple HPLC method has been developed and validated for the assay of tioconazol in polymeric nanocapsule suspensions. The method showed good results with respect to specificity, linearity, precision, accuracy, and robustness.

Compounds 4, 5, and 7 showed the best protection against UVB sunrays, while compounds 5, 6, and 7 presented the best results for protection from UVA, so compound 7 had the most balanced protection.

Eight compounds, including terpenoids (jatrophone, hydroxyjatrophone, 6-hydroxycyperene, cabraleadiol monoacetyl, and cabraleadiol) and coumarins (fraxetin, fraxidin, and isofraxidin), were isolated from Jatropha ribifolia (Euphorbiaceae).

Extracts of lichens collected from Brazil and Antarctica were evaluated for their 2,2'-diphenyl-1-picrylhydrazyl (DPPH) free-radical scavenging activity and for their toxicity in Artemia salina bioassay. The composition of the extracts was determined using TLC and NMR, leading to the identification of nine compounds.

Lipases from various sources were immobilized in agar gel and the system used as a catalyst in the chemo-enzymatic epoxidation of β-caryophyllene under mild reaction.

Latent fluorogenic probes are chemical tools for the detection and understanding of enzymatic activities, providing real-time clues about complex biological processes.

Reaction using the primary intermediate (p-phenyldiamine) and the coupler (resorcinol) in the presence of hydrogen peroxide, resulting in the formation of the dye Idoaniline, of red color.

Separations using super/subcritical fluid chromatography (SFC) with packed columns have been re-discovered and explored in recent years. SFC with the use of CO₂ and modifiers (5-50%) have been providing fast, efficient and greener separations.

The immobilization of heavy-metal wastes in iron phosphate glass decreases their release rate into the environment and constitutes an option for the management of hazardous metal residues produced on a small scale.

Photocatalytic decomposition of NO_x pollutants by mortars containing TiO₂ nanoparticles.

The antiepileptic drugs phenobarbital, phenytoin and carbamazepina were extracted from a single blood spot on paper and simultaneously determined by HPLC-DAD

The improvement in chemistry teacher training involves discussions that interrelate educational policies, supervised stage, and chemistry teaching in undergraduate courses in Brazilian context.

Voltammetric electrodes were prepared using recycled graphite obtained from exhausted commercial 1.5 V batteries and its application in electroanalysis with didactic purposes is described in several simple laboratory experiments.

The separate evaluation of the steps of the synthesis (reaction, isolation and purification) for several protocols with the green star (GS) allows reaching an optimized protocol from information on the greenness of each step.

A battery of three hierachized metrics (atomic economy, AE, reaction mass efficiency, RME, and mass intensity, MI) is presented for evaluation of the material greenness of synthesis reactions, which involves two components: AE and RME evaluate the atomic greenness (incorporation in the product of the atoms from reagents) and MI evaluates the global massic greenness.