ORCID Profile
0000-0001-9281-448X
Current Organisations
Udemy
,
Udemy Inc
,
Rasayely Editing
,
Chemistry Explained
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Publisher: Wiley
Date: 19-09-2011
DOI: 10.1002/APP.35072
Publisher: Elsevier BV
Date: 02-2014
DOI: 10.1016/J.IJBIOMAC.2013.10.044
Abstract: Three novel thiosemicarbazone O-carboxymethyl chitosan derivatives were obtained via a condensation reaction of thiosemicarbazide O-carboxymethyl chitosan with o-hydroxybenzaldehyde, p-methoxybenzaldehyde, and p- chlorobenzaldehyde respectively. Their structures were characterized by elemental analysis, FTIR, (13)C NMR and X-ray diffraction. The antimicrobial behaviors of the prepared derivatives against three types of bacteria Staphylococcus aureus (S. aureus, RCMBA 2004), Bacillus subtilis (B. subtilis, RCMBA 6005), and Escherichia coli (E. Coli, RCMBA 5003) and three crops-threatening pathogenic fungi Aspergillus fumigatus (A. fumigatus, RCMBA 06002), Geotrichum candidum (G. candidum, RCMB 05098), and Candida albicans (C. albicans, RCMB 05035) were investigated. The results indicated that the antibacterial and antifungal activities of the investigated derivatives are much higher than those of the parent O-carboxymethyl chitosan. They were more potent in case of Gram-positive bacteria than Gram-negative bacteria. The presence of electron withdrawing chlorine atom on the aryl moiety of the aldehyde portion improved greatly antimicrobial activity to be nearly equivalent to the used standard drugs.
Publisher: Springer Science and Business Media LLC
Date: 25-02-2012
Publisher: Informa UK Limited
Date: 07-2020
DOI: 10.2147/OTT.S258332
Publisher: Royal Society of Chemistry (RSC)
Date: 2015
DOI: 10.1039/C4NJ01926A
Abstract: Varying the solvent offers a simple way to control superstructure polymorphism of a tri-β 3 -peptide-based supramolecular system.
Publisher: Wiley
Date: 11-10-2014
DOI: 10.1002/ADV.21479
Publisher: Royal Society of Chemistry (RSC)
Date: 2020
DOI: 10.1039/D0MA00123F
Abstract: Coordination crosslinking of oligoamide nanorods yields two dimensional metallosupramolecular framework.
Publisher: Royal Society of Chemistry (RSC)
Date: 2016
DOI: 10.1039/C6CP01355D
Abstract: Synchrotron far-infrared spectroscopy was used in conjunction with density functional theory vibrational analysis to ascertain the core structure of self-assembled fibrous superstructures formed by unnatural β 3 -tripeptides.
Publisher: Walter de Gruyter GmbH
Date: 08-09-2015
Abstract: Peptides based on unnatural β 3 -amino acids offer a versatile platform for the design of self-assembling nanostructures due to the folding stability of the 14-helix and the high symmetry of the side chains inherent in this geometry. We have previously described that N-terminal acetylation (Ac-) forms a supramolecular self-assembly motif that allows β 3 -peptides to assemble head-to-tail into a helical nanorod which then further bundles into hierarchical superstructures. Here we investigate the effect of the topography of the 14-helical nanorod on lateral self-assembly. Specifically, we report on the variations in the superstructure of three isomeric peptides comprising the same three β 3 -amino acid residues: β 3 -leucine (L), β 3 -isoleucine (I) β 3 -alanine (A) to give peptides Ac-β 3 [LIA], Ac-β 3 [IAL] and Ac-β 3 [ALI]. AFM imaging shows markedly different superstructures for the three peptides. Well defined synchrotron far-infrared spectra reveal uniform geometries with a high degree of similarity between the isomeric peptides in the amide modes of the 400–650 wavenumber range. Far-IR also confirms that the C-terminal carboxyl group is free in the assemblies, thus it is solvated in the dispersant. Hence, the differences in the superstructures formed by the fibers are defined primarily by van der Waals energy minimization between the varied cross sectional morphologies of the core nanorods.
No related grants have been discovered for Rania seoudi.