Search results for "CHIMICA"
showing 10 items of 4450 documents
Behaviour of the Belousov-Zhabotinsky oscillator in the presence of carboxymethyl-celulose
2008
Physical Processes and Chemical Processes guiding polyoxomatalates self-structuring on surfaces
2010
Cyclo- and Polyphosphazenes for Biomedical Applications
2022
Cyclic and polyphosphazenes are extremely interesting and versatile substrates characterized by the presence of -P=N- repeating units. The chlorine atoms on the P atoms in the starting materials can be easily substituted with a variety of organic substituents, thus giving rise to a huge number of new materials for industrial applications. Their properties can be designed considering the number of repetitive units and the nature of the substituent groups, opening up to a number of peculiar properties, including the ability to give rise to supramolecular arrangements. We focused our attention on the extensive scientific literature concerning their biomedical applications: as antimicrobial age…
Complex formation of copper(II) and cadmium(II) with pectin and polygalacturonic acid in aqueous solution. An ISE-H + and ISE-Me 2+ electrochemical s…
2012
The acid-base properties of pectin and its ability to complex with copper(II) or cadmium(II) were quantitatively determined in order to define the ability of this natural polyelectrolyte to sequester metal ions. Potentiometric measurements carried out at different ionic strengths (0.1 - 0.7 mol L-1, in Na+ ionic medium) allowed us to define the acid-base properties of pectin together with the dependence of the protonation constants on ionic strength and to calculate the protonation constant at infinite dilution. The formation of complex species between pectin and copper(II) or cadmium(II) was investigated potentiometrically (using H+, Cu2+ and Cd2+ Ion Selective Electrodes, ISEs) in NaNO3 a…
Freeze dried pomegranate juices of Moroccan fruits: main representative phenolic compounds.
2022
The pomegranate (Punica granatum) is an ancient perennial plant species of the Punicaceae family. Its seeds are consumed as food or as juice. Previous studies have noted that pomegranate juice encompasses many active compounds with beneficial effects. The main goals of this work were to study the phenolic components of freeze-dried and reconstituted pomegranate juices obtained from 13 pomegranate genotypes growing in Morocco.We analyzed several pomegranate juices using high-performance liquid chromatography and high-resolution mass spectrometry to determine phenolic compounds. Twenty-seven bio-phenols, belonging to four different classes (phenolic acids, hydrolyzable tannins, anthocyanins, …
ORGANOTIN(IV)-PORPHINATE FOR PHOTOVOLTAIC BULK HETEROJUNCTIONS
2013
Due to the versatility and variability of their molecular structures, optical spectra, electrical properties, and supramolecular organization potential, porphyrins related compounds have been widely studied in organic solar cells [1,2]. Indeed, these applications are a natural function for these compounds, and they have been extensively investigated in a variety of formats including single molecules, macromolecular and supramolecular structures. In this work, poly(hexylthiophene) (P3HT) and organotin(IV)-[meso-tetra(4-carboxyphenyl) porphinate] have been employed for engineering planar and bulk heterojunctions by layer by layer deposition. Improving the overall efficiencies of photovoltaic …