Chemistry Journal of Moldova

Supramolecular chemistry

RECENT TRENDS IN ALGINATE, CHITOSAN AND ALGINATE-CHITOSAN ANTIMICROBIAL SYSTEMS

Author(s):

Albert Ivancic


Field: Supramolecular chemistry
Type: Research paper
Issue: 2016 Volume 11, no.2
Pages: 17-25
Keywords: alginate, chitosan, antimicrobial system, ionotropic gelation, drug.
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DOI:
dx.doi.org/10.19261/cjm.2016.11(2).03   
 
Abstract (PDF)
Graphical Abstract: Present work outlines the main synthetic approaches for the preparation of antimicrobial systems based on alginate (1) and chitosan (2) polymers as well as identifies potential areas of their application. Various techniques used for preparation, applications and usefulness of these systems as carriers of antimicrobial compounds are also discussed.


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PHASE DIAGRAM OF GELATINE-POLYURONATE COLLOIDS: ITS APPLICATION FOR MICROENCAPSULATION AND NOT ONLY

Author(s):

Alexei Baerle, Olga Dimova, Irina Urumoglova, Pavel Tatarov, Larisa Zadorojnai


Field: Supramolecular chemistry
Type: Research paper
Issue: 2016 Volume 11, no.1
Pages: 97-105
Keywords: protein-polysaccharides, colloids, electrokinetic potential, phase diagram, microcapsules.
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Abstract (PDF)

DOI:
dx.doi.org/10.19261/cjm.2016.11(1).13

Graphical Abstract:
 Phase state and the charge of colloidal particles in the gelatine-polyuronate system were studied. A method for comparative evaluation of molecular weight of colloids by means of viscosimetric measurements and electrophoresis was developed. It is shown that the Diagram {Phase state = f (composition, pH)} contains six well-defined regions. The diagram explains and predicts the behaviour of protein-polysaccharide colloids, which are included in beverages or forms the shells of oil-containing microcapsules.



Downloads: 38

BIOMATERIALS BASED ON NANOHYDROXYAPATITE

Author(s):

Gabriela Ciobanu, Constantin Luca, Octavian Ciobanu


Field: Supramolecular chemistry
Type: Research paper
Issue: 2014 Volume 9, no.1
Pages: 132-135
Keywords: hydroxyapatite, cellulose acetate, scaffold
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Abstract (PDF)

DOI:
dx.doi.org/10.19261/cjm.2014.09(1).18

Graphical Abstract:
 In this study, the porous hydroxyapatite-filled cellulose acetate scaffolds were prepared via dry-wet phase inversion method by dispersing hydroxyapatite nanoparticles in the polymeric matrix. The calcined hydroxyapatite prepared by wet precipitation method has the crystal size smaller than 50 nm. The unfilled and hydroxyapatite-filled cellulose acetate scaffolds have an asymmetric structure consisting of two layers, the dense top layer (active layer) supported by the porous sub-layer (substructure). The cross-sectional SEM images revealed that hydroxyapatite nanoparticles were well dispersed in the cellulose acetate matrix.


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HYBRID ORGANIC-INORGANIC COMPOSITE MATERIALS FOR APPLICATION IN CHEMICAL SENSORS

Author(s):

Anca-Dana Bendrea, Ana-Maria Catargiu and Mircea Grigoras


Field: Supramolecular chemistry
Type: Research paper
Issue: 2009 Volume 4, no.2
Pages: 100-104
Keywords: polymers composites, SBA-polithiophene, SBA-polyaniline.
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Abstract (JPEG)

DOI:
dx.doi.org/10.19261/cjm.2009.04(2).03

Graphical Abstract:



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USE OF ELECTROSPRAY MASS SPECTROMTERY TO STUDY THE INTERACTIONS BETWEEN PARA-SULPHONATO-CALIX[4]ARENE AND A SERIES OF SERUM ALBUMIN PROTEINS

Author(s):

Jalil Moubarak, Elodie Moreno, Eric Diesis and Anthony W. Coleman


Field: Supramolecular chemistry
Type: Research paper
Issue: 2009 Volume 4, no.2
Pages: 94-99
Keywords: Calix[n]arene, para-Sulphonato-calix[4]arene, Electrospray Mass Spectrometry, Binding Constants, Complex Stoichiometry, Sequential Binding.
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Abstract (JPEG)

DOI:
dx.doi.org/10.19261/cjm.2009.04(2).04

Graphical Abstract: 
The binding of para-Sulphonato-calix[4]arene to a series of Serum Albumin Proteins has been studied using Electrospray Mass Spectrometry, each protein shows different capacities to interact with para-Sulphonato-calix[4]arene, including the number of ligands bound, the Association Constants observed, and the stoichiometries at which the onset of each binding event is observed.

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THE SOLID-STATE INCLUSION COMPLEX BETWEEN THE MONO-ANION OF CALIX[4]ARENE AND PROTONATED DIAMINO-BICYCLOUNDECANE

Author(s):

Oleksandr Shkurenko, Kinga Suwinska, Florent Perret, Katia Sigaud, Antoine Leydier, Said Jebors and Anthony W. Coleman


Field: Supramolecular chemistry
Type: Research paper
Issue: 2009 Volume 4, no.2
Pages: 86-93
Keywords: Calix[n]arenes, X-ray Crystallography, Structure, Mono-anionic, Diamino-Bicycloundecane, inclusion polymer.
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Abstract (JPEG)

DOI:
dx.doi.org/10.19261/cjm.2009.04(2).05

Graphical Abstract:
 Diamino-bicycloundecane mono-deprotonates H-calix[4]arene and the solid-structure of the resulting salt has been determined by X-ray crystallography. Two different complexes are present in the structure with the Diamino-bicycloundecane cation held in the calix[4]arene cavity by CH-p interactions. In the packing there is a hydrogen-bonded polymeric chain. Both the complexes formed layered structures with differing inter-layer distances. 

Downloads: 7