JBCS

Diagram of the multicommuted flow system showed in the standby condition. Under this configuration, all solutions are pumped back to their storing vessels, resource used to save reagent solution.

Model of UDP-N-acetylglucosamine pyrophosphorylase from M. perniciosa constructed by comparative modeling show 13 alpha helix (region in yellow) and 24 beta sheets (region in red).

Fluorescence measurements obtained directly from the solid phase at different reaction time. A simple, non-destructive and low cost method to evaluate the reaction progress, study the reaction kinetic and determine the resin loading.

Diclofenac oxidation efficiency decreased as pH increased, however significant oxidation was obtained at pH 6 and 7 using ammonium iron (III) citrate, achieving 77% and 62% after only 10 min, respectively.

Metal impurities were determined by direct solid sampling electrothermal atomic absorption spectrometry (DSS-ET AAS). This method allowed the determination of eight elements with lower limits of detection and minimized reagent consumption and residue generation.

Metal impurities were determined by direct solid sampling electrothermal atomic absorption spectrometry (DSS-ET AAS). This method allowed the determination of eight elements with lower limits of detection and minimized reagent consumption and residue generation.

Flotation of the Ni and dimethylglyoxime (D) complex at the aqueous solution and n-hexane interface. [NiD₂]^2- could form in alkaline medium and has very low solubility in water and organic phase.

Automatic flow-batch analyzer for adulteration detection in distilled spirits. Components: electronic actuator, flow-batch chamber, magnetic stirrer, peristaltic pump, solenoid valves, microcomputer and UV-Vis spectrophotometer.

High performance thin layer chromatographic method (HPTLC) for analysis of nabumetone and paracetamol (silica gel 60 F₂₅₄ as stationary phase and toluene:propanol-2:acetic acid; 8:2:0.1, v/v/v as mobile phase) in fixed dose combination has been developed.

Green and automatic potentiometric determination of biodiesel acid number: a fundamental parameter in biodiesel specification.

SECM is a scanning probe microscopy (SPM) and operated by scanning or "rastering" an ultra-microelectrode (UME) over a surface to be investigated. UME is referred as "tip" and can be operated under amperometric or potentiometric conditions.

The 3D supramolecular self-assembly architecture of the mixed ligand manganese(II) complex formed by π-π stacking interactions and hydrogen bonds.

HPLC chromatogram of crude aqueous extract of Cecropia pachystachya leaves and the phenolic compounds identified

Studies of the interaction of disruptors endocrines with aquatic humic substances from tropical rivers indicate that AHS can strongly influence the transport and reactivity of endocrine disruptors in aquatic systems.

The chemical investigation of the bark G. blepharophylla afforded twelve compounds: two sesquiterpenes, one xanthone, a mixture of two steroids and seven isoquinoline alkaloids. Some of them could be considered chemotaxonomic markers of this genus.

NiMo/Al₂O₃ shows higher HDN and HDA activities towards the hydrogenation of heavy oil obtained from the direct coal liquefaction process, which are associated with crystallite size and reducibility of metal sulfide, the nature of active sites and acidity.

Investigation of the microbial fermentation organic extract of Penicillim sp. led to the isolation of new isoquinolinone alkaloid, (5S)-3,4,5,7-tetramethyl-5,8-dihydroxyl-6(5H)-isoquinolinone. It has a carbon skeleton similar to citrinin.

Some new pyrazole, isoxazole, pyrimidine, pyridopyrimidine, benzodiazepine, pyridotriazepine, triazolothiadiazepine, triazinothiadiazepine, pyranopyrazoline and pyranopyrimidine derivatives linked thiazolidine-2,4-dione were prepared.

This figure shows the biotransformation process of omeprazole by phytopathogenic and endophytic fungi to obtain 5-hydroxyomeprazole and mainly omeprazole sulfone.

Di(2-ethylhexyl)phthalate (DEHP) and bisphenol A (BPA) were investigated in the wastewater treatment plant of the University of Caxias do Sul (WWTP-UCS). The average concentrations at the outflow point were 52.52 and 20.00 mg L^-1, for BPA and DEHP, respectively.

This work investigated the presence of PHA in sewage sludge and in soil with sewage sludge. Phenantrene was the most abundant compound detected in the samples.

Generation of volatile species (CVG) from different ions (including cations and anions) of transition metals in the acidic media by reaction with sodium tetrahydroborate reductant using ICP OES as detection method was presented.

The conducting biofilms (CBs) synthesized from cassava starch, mixed with GLY, GLU, PEG and LiClO₄ in different proportions showed high values of conductivity and morphological and molecular differences. So, CBs, make up a new and environmentally, friendly technology and with big potential.

Incubation of sclareolide with eight different fungi species in two different media, afforded six different compounds, four of which were found to be new substances. Cytotoxic evaluation of the compounds indicated that two compounds displayed activity against several cancer cell lines.

Organic ultraviolet ray absorbers were intercalated into zinc hydroxide nitrate, either by direct alkaline co-precipitation or topotactic exchange reactions. After the intercalation, the UV absorption capacity was similar to that of the solid salts and acids, the effect being attributed to the confinement of the anionic species in the host two-dimensional gallery.