JBCS

This account illustrates the significant innovative potential of ESI.MS for the investigation of the organic/organometallic reaction mechanisms. It is also exemplified the usage of the ion/molecule reactions to probe the catalyst activity of different species intercepted in condensed phase, a straightforward method not available so far

The oxygen enhanced combustion (OEC) is presented as a promising technique for increasing the energy efficiency of industrial burners. However, some gaps appear to explain the application of this technique in the oil and gas industries, and this work presents an evaluation on the subject

In this paper, a simple method for treating fresh (FM) and processed for (PM) meat with tetra-methylammonium hydroxide (TMAH) is proposed to the determination of Ca, Cu, Fe and Mg by atomic absorption spectrometry

Sediment samples were collected along the Santos Estuarine System and metal (such as Cu, Hg, Ni, Pb and Zn) concentrations were measured. Some of the sample presented Hg concentration above the Canadian Sediment Quality Guidelines recommendation. The study of the PCA grouped sites close to an important industrial area indicated a more critical sediment contamination, which was confirmed by the cluster analysis. The results demonstrated that metal contamination is still a problem for the bent ecosystem of the Santos Estuarine System (Sao Paulo State, Brazil)

Suspending rate of DWG with different lignosulfonates at 8.0% dosage. The dispersant modified from sugar cane bagasse lignin (EBL-M) had the equal dispersing efficiency to kinsperse and being higher than other commercial lignosulfonates

The aqueous styrene photocatalytic degradation reaction was evaluated using TiO₂ P-25 (Degussa) as a catalyst. The chromatographic analysis revealed benzaldehyde as one of the intermediates

3β-(E)-cinnamoyleuphorbol, a new tirucallane triterpene together with known compounds of euphane, cycloartane and ingenane skeleta were isolated from latex of E. viscose and evaluated for their molluscicidal, mutagenis, genotoxic and citotoxic activities

Sequential injection system for determination of quinine: C = carrier solution (H₂O), SV = syringe valve, SP = syringe pump, HC = holding coil, RV = eight port rotary selection valve, S = standard solution, R = 0.10 mol L-1 sulfuric acid, RC = reaction coil, D = fluorimetric detector and W = waste

Ce-USY (2-25 wt.% of CeO₂) showed increased Lewis/Bronsted ratio with increasing cerium loadings due to the interaction of the excess cerium with USY hydroxyl groups and the formation of CeO_x species

An alternative method for the simultaneous quantification of clavulanic acid (CA) and amoxicillin (AMO) in powder pharmaceutical formulations using ATR/FTIR spectroscopy and variable selection by interval PLS (i PLS), synergy interval PLS (si PLS) and backward interval PLS (bi PLS)

Chromatographic separation of the studied compounds in the two sets of chromatographic conditions. Triclosan (TR), chlorexidine digluconate (CD) and benzalkonium chloride homologues (C12, C14 and C16)

The validation of a modified QuEChERS method allowed the extraction of carbofuram, bispyribac-sodium, clomazone, and tebuconazole from rice bran and its coproducts. The HPLC-DAD method (illustrated in the chromatogram) were suitable for both indetification and quantification of such compounds

Schematic diagram of the primary system of coulometry with the coulometric cell to characterize the purity of the potassium chloride

1,3,5-Triazinane-2,4-dithiones were efficiently synthesized via condensation of 2 equiv. of 1-arylthioureas with 1 equiv. of aliphatic carboxylic acids using ferric chloride hexahydrate as a catalyst

Pharmaceuticals go through metabolic processes in the organism after ingestion. They are later excreted in their original form or as metabolites. They end up in surface water and eventually in water treatment plants. Since the treatment may not be as efficient in their removal, they can be found in drinking water

The figure represents a sequence of the origin, purification and sulfation of cashew gum. The first panel shows the tree exudation, followed by the purified gum and the sulfation on the C-6 of galactose, the main constituent of cashew gum

The graphical abstract represents a possible arsenic detoxification in plants by phytochelatins that are peptides biosynthesised from glutathione GSH (g-Glu-Cys)_n-Gly which are enzimatically sintetized by PC-sinterase

Microcontroller employed as a central processing unit (CPU) able to drive and communicate with several devices simultaneously, such as: liquid crystal display, photodiode, light emitting diode, universal serial bus (USB), and personal computer (PC)

The interaction between strongly delocalized carbocations and an aromatic ring was investigated as a model study for the reactions involved in terpene biosynthesis

This figure shows that Fe and Al have significant catalytic effects on the reaction of xylene cyanol FF with hydrogen peroxide and potassium periodate simultaneously present, whereas both Fe and Al have no catalytic effects on oxidation reaction of xylene cyanol FF in the presence of either hydrogen peroxide or potassium periodate

A comparative study between microwave irradiation and conventional heating protocol was performed on the esterification reaction of oleic acid catalyzed by lipases and the results revealed no difference on the reaction time or yield

H bonds formed between the best conformation of the oxime K005 and the residues of the active site of Mus musculus acetylcholinesterase (MmAChE)

A simple and fast capillary zone electrophoresis method for determination of nevirapine in drug products was developed and validated. Nevirapine was separated in less than 2.0 min

CdSiO₃ can be prepared at 580 °C from cadmium chloride and two different Si-containing precursors: mesostructured silica and sodium silicate. This results in strikingly different morphologies: sodium silicate yields needle-shaped nanostructures, whereas mesostructured silica leads to coralloid-shaped structures

The figure shows the use of solvent-free conditions in the extraction of oil from oleaginous seeds. The use of surfactant allows extracting oil from seeds with good yields. The obtained oil has the same properties of oil obtained by classical method. A positive economic and environmental impact of the proposed method is shown