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Grafting of oxidized carboxymethyl cellulose with hydrogen peroxide in presence of Cu(II) to chitosan and biological elucidation

Benghanem S., Chetouani A., Elkolli M., Bounekhel M., Benachour D.

Biocybernetics and Biomedical Engineering

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2017

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Vol. 37, no. 1

94--102

EN

The chemical interaction of chitosan (CS) is performed in the presence of sodium carbox-ymethyl cellulose (CMC) and/or oxidized CMC. The latter is obtained by the action of H2O2/CuSO4 to generate carbonyl and carboxyl groups which were increased with CuSO4 concentration. The characterization of these new materials is made by FTIR, TGA, XRD and SEM. Examination of the hemolytic potential showed that the hydrogels were non hemolytic in nature. The hydrogels were non-toxic and blood-compatible. The antibacterial and antioxidant activities of samples were investigated.

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The antioxidant and antibacterial activities of the essential oils of Marrubium vulgare growing wild in Eastern Algeria

Abadi A., Abdellatif F.

International Letters of Chemistry, Physics and Astronomy

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2013

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Vol. 10, iss. 2

159-166

EN

The chemical composition was analyzed by gas chromatography (GC) and gas chromatography/mass spectrometry (GC/MS). The constituents were identified by their mass spectra and Kovats’ indices. Fivety (50) components in the oil of M. vulgare were identified. The results demonstrated that the major components of the essential oil were : 4,8,12,16-Tetramethyl heptadecan-4-olid (16.97 %), Germacrene D-4-ol (9.61 %), α- pinéne (9.37 %), Phytol (4.87 %), Dehydro-sabina ketone (4.12 %), Piperitone (3.27 %), δ-Cadinene (3.13 %), 1-Octen-3-ol (2.35 %) and Benzaldehyde (2.31 %). The antioxidant activity of the oils was assessed by measurement of metal chelating activity, the reductive potential, the free radical scavenging (DPPH) assay. The antioxidant activity was compared with that of synthetic antioxidants: butylated hydroxyanisole (BHT) , and the essential oils . The results showed as the Essential oil of M vulgare was evaluated for its antibacterial activities against Gram-positive and Gram negative pathogenic bacteria: Listeria monocytogene, Pseudomonas aeruginosa , Agrobacterium tumefaciens and Salmonella enterica.

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Chemical Composition and Antibacterial activity of Essential Oil of Marrubium vulgare from Eastern Algeria

Abadi A., Hassani A.

International Letters of Chemistry, Physics and Astronomy

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2013

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Vol. 10, iss. 1

61-69

EN

The essential oil from flowering Marrubium (Marrubium vulgare L.) an aromatic member of the Lamiaceae family, from Algeria, obtained by hydrodistillation, was analysed by GC/FID and GC/MS. The constituents were identified by their mass spectra and Kovats’ indices. Fivety (50) components in the oil of M. vulgare were identified. The results demonstrated that the major components of the essential oil were: 4,8,12,16-Tetramethyl heptadecan-4-olid (16.97 %), Germacrene D-4-ol (9.61 %), α- pinéne (9.37 %), Phytol (4.87 %), Dehydro-sabina ketone (4.12 %), Piperitone (3.27 %), δ-Cadinene (3.13 %), 1-Octen-3-ol (2.35 %) and Benzaldehyde (2.31 %). Essential oil of M vulgare was evaluated for its antibacterial activities against Gram-positive and Gram negative pathogenic bacteria: Bacillus subtilis, Micrococcus luteus, Escherichia coli and Klebsiella pneumoniae.

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Structural Characterization of Some New Coordination Compounds of Tin(II) with Schiff Bases of Sulpha Drugs

Maheshwari R., Sharma S., Bedi M., Varshney A.K.

Polish Journal of Chemistry

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2008

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Vol. 82, nr 7

1361-1365

EN

Some new coordination compounds of tin(II) have been synthesized by the reaction of tin(II) methoxide with the Schiff bases prepared by condensation of aldehyde/ketones with sulpha drugs. These complexes have been characterized on the basis of elemental analysis, ultraviolet, infrared, 1H NMR and 119Sn NMR spectral studies. The analytical data of complexes indicate 1:2 metal ligand stoichiometry of the type of [ML2], where M = Sn(II). The ligands be haved as bidentate chelating agents and bonded to the metal ion through imines nitrogen and ox ygen atom of either moiety of ligand. The antibacterial activities of the ligands and their tin(II) coordination compounds have been screened in vitro against the o ga ism Escherichia coli, Staphylococus aureus, Prouteus mirabilis,and Bacillus thurengiensis.