JBCS

Efficient leaching of spent zinc-MnO₂ dry cells under mild experimental conditions using strong acids. Zn(II) was preferably extracted over Mn(II) by TBP or Cyanex 923.

Leaves of Saururus cernuus (Saururaceae) were extracted using BMImBr and H₂O in a MAE system. Using a bioactivity guided fractionation (cytotoxic assay) were obtained four related neolignans (1-4).

Preparation of [TMEDSA][TFA]₂ and synthesis of 1,8-dioxo-9,10-diaryl-decahydroacridines catalyzed by this novel ionic liquid.

Photoimages of (a) NE containing lapachol at 1 mg mL^-1 (F2-Lp) and (b) unloaded F2 NE. Results from F2-Lp formulation of droplet size distribution (top right) and analytic centrifugation with LUMiSizer^® (bottom image).

Validation methods of theoretical models show importance in the evaluation of efficiency, reliability and magnitude of errors in theoretical data calculations, allowing the selection of better methods with greater representativeness and correspondence with experimental data.

Zr-based metal-organic framework with bipyridine dicarboxylate moieties (UiO-67) has been utilized for the immobilization of ruthenium(II) Schiff base complex.

Nickel-diimine complexes containing the pseudo-halide ligands isothyocyanate and isoseleniumcyanate were synthesized and used in ethylene polymerization giving branched polyethylene in high yield.

Influence of extraction process on flavonoid content from Cnidoscolus quercifolius (Euphorbiaceae) and antioxidant activity.

Bambus[n]uril cavitands have a low electron density (blue) at the center of the cycle and binds anions with high affinity and selectivity.

The figure shows generic profiles of SSCP curves for situations of inert (a), labile (b) and quasi-labile (c) complexes for Cd(II) in the presence of ligands.

The spread of PBDEs is a subject of recent concern due to their adverse effects and persistency. Thus, it is important to assess their concentrations in different matrices in order to better understand their behavior and fate in the environment.

The immobilization of cyclodextrin onto the surface of gold nanoparticles at the time of their formation. Cyclodextrin acts as a reductant and a stabilizer.

Light dosimetry effectively absorbed (Da_bs) by methylene blue in photosensitization processes employing polychromatic light sources.

Fabrication of the FDTS-modified cork membrane and separation of oil/water mixtures.

In this article we discuss the space of Chemistry in Brazilian science centers and museums through a documental survey conducted by telephone, mail and analyzing the websites of those places.

Top Figure: Potential energy for A ⇆ B reaction. Bottom Left Figure: Transitions between states A and B. (i) Ehrenfest urn model (Urns A and B) randomly defines the collision between molecules; (ii) Monte Carlo method (P_AB and PP_BA: Metropolis Update) defines the transition probabilities. Bottom Right Figure: A tipical results for 10² samples.

Presentation of the origin of the names and the historical background of development of glassware used in Chemistry experimental classes can make learning more meaningful.

The Euler's relation, as a mathematical consequence of the exact differential equations, allows an easy and didactic differentiation of the thermodynamic variables in state functions and process variables.

This article discusses the epistemological obstacles related to the Pedagogical Knowledge of Chemistry Content that influence the formative process of future professors of chemistry.

A didactic alternative approach is proposed for deducing molecular orbital topology of acyclic and cyclic conjugated polyenes, relative energies, and orbital degeneracy to cyclic polyenes and their aromatic or antiaromatic character.

Experimental apparatus for determining atmospheric pressure in the laboratory.

The conductivity of millimolar electrolyte solutions can be studied in undergraduate laboratory experiments by dropping electrolyte solutions in deionized water.

This work proposes a discussion on the construction of texts that deal with the biological properties of ruthenium complexes and their application as metallodrugs, aiming to criticize the misuse of some generalizations about the chemistry of this element.