JBCS

Investigation of X-ray photolysis of methanol ice with identification of produced species, determination of Equilibrium Branching Ratio (EBR) and timescale to reach chemical equilibrium.

The epoxy ring-opening was studied by molecular dynamics simulations with ethylene oxide and methanediamine. The intermediate product (C₃H₂NO) is shown in the figure above, in which carbon, hydrogen, nitrogen and oxygen atoms are represented in gray, green, blue and red, respectively.

Trace metals accumulate in various geochemical phases of the sediment through adsorption, co-precipitation and complexation and can be found in the soil in the forms described in the scheme above.

The use of GC-MS in the identification of arson-derived accelerants and computer simulation using FDS to verify whether fire damage is compatible to occur naturally or only with the use of accelerant.

Infrared spectral absorption locations are indicative of functional groups bonds (e.g., aliphatic, amidic, aromatic and carboxylic) which provide important information about organic matter composition of coastal sediments.

The phytochemical study of the S. crassifolia roots led to the isolation of thirteen compounds. Their chemical structures were determined by IR and 1D/2D NMR together with X-ray diffractometry. Extracts of S. crassifolia and some of the compounds were evaluated on acetylcholinesterase inhibition, in vitro cytotoxic activity and in vivo toxicity tests using Caenorhabditis elegans model. All tested compounds inhibited acetylcholinesterase. The tested compounds showed low cytotoxicity against the THP-1, K562 and MDA-MB-231 cancer cell lines. None of the tested compounds and extracts were toxic against C. elegans.

A new A-seco-limonoid, dictyolomol, isolated from the inflorescences of Dictyoloma vandellianum.

Microbial nanocellulose was utilized as a biomatrix for the physical adsorption of human insulin and, after a full physicochemical characterization, was used in transdermal permeation studies aiming at developing a new route for insulin delivery.

Evaluation of the composition, physicochemical and antioxidant characteristics, and chemical profile of ripe "Prata" banana peel flour.

The geometric parameters, vibrational frequencies and frontier molecular orbitals are calculated with PBE, RPBE, HCTH, PW91 and BLYP functionals. Electron density isosurface and atomic charge distribution are calculated to demonstrate the active-site of finasteride.

Design, synthesis, characterization and determination of biological activity of scorpionate ligand coordinated with copper (Cu), cobalt (Co), and tin (Sn).

A multivariate method based on the color histogram of digital images can be applied to monitor the degradation of dyes.

DCCR planning optimization showed that GR activity from Aegla increases as function of higher GSSG and lower protein concentration in the reaction. In environmental validation, GR activity was lower in watersheds that presented higher percentage of anthropogenic uses.

The electrospinning technique can be used in conjunction with photodynamic therapy for the manufacture of materials for medical use. A systematic review of the union of the two techniques is presented.

Nanotechnology has become an important innovation to be used in soil and contaminated water remediation processes. The zero-valent iron (nZVI) is considered an efficient nanomaterial capable of degrading various types of pollutants.

A rapid and reliable method by HPLC-QqQ-MS/MS for identification and quantification of Kaurenoic acid (KA) in extract, tincture and syrup from Mikania glomerata. The developed method represents an excellent alternative for agile and efficient analysis of the KA in complex matrices from simple dilution.

Evaluating of difficulties of undergraduate on the report of Chemistry Lab Experimental.

This work shows the application of commercial drugs as alternative reagents for organic chemistry and medicinal chemistry education.

A didactic sequence for the study of the environment, extremely important subject and very useful for both academic and personal life.

This paper summarizes the mechanisms and concepts involved in the HDPE geomembrane aging and describes the important contributions of laboratory and field studies over the years around the world.

Hand and surface hygiene, associated with social distance and the use of masks, are the most effective measures to prevent the spread of coronavirus and worsening the pandemic.