No 1, Janvier 2008

Tome 53, No 1, Janvier 2008

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1. Maria BRUMĂ

Polyphenylquinoxalines containing hexafluoroisopropylidene groups

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Key words: phenylquinoxaline rings, hexafluoroisopropylidene groups, thin films, high thermal stability, low dielectric constant

2. Gabriela BLĂNIŢĂ, Monica BUCŞA, Maria COROŞ and Mircea VLASSA

Synthesis of new functionalized macropolycyclic ligands based on triazacyclononane and
tetraazacyclododecane

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Key words: aza-crown ethers, macropolycyclic ligand

3. Rodica DINICĂ, Bianca FURDUI, Gabriela BAHRIM et Martine DEMEUNYNCK

Précurseurs de nouveaux hétérocycles d’intéret biologique
New heterocycles precursors with biologic interest

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Key words: 4,4’-bipyridine, propriétés antimicrobiennes, microorganismes

4. Gelu BOURCEANU, Jean François LE MARÉCHAL Lavinia ONEL et Militina BOURCEANU

Thermodynamique des reactions reversibles, renversables et irreversibles
Thermodynamic of reversible, invertible and irreversible reactions

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Key words: réversibilité, renversibilité, irréversibilité, énergie libre

5. Cristina-Eliza BRUNCHI, Simona MORARIU and Maria BERCEA

Influence of temperature on dynamic behavior of polyacrylonitrile in dimethylformamide

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Key words: polyacrylonitrile, dynamic properties, gelation

6. Cătălina ITICESCU, Geta CÂRÂC, Olga MITOŞERIU and Thomas LAMPKE

Electrochemical deposition of composite coatings in copper matrix with TiO2 nanoperticles

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Key words: composite coatings, copper matrix, nano-TiO2 particles, electrochemical codeposited, mechanism

7. Ioana FECHETE, Eric GAUTRON, Emil DUMITRIU, Doina LUTIC, Philippe CAULLET and Henri KESSLER

Studies on the acitidy and the stability of Fe3+ ions in the framework of (Si, Fe)-MCM-22 zeolite.
Selective para-xylene production by toluene disproportionation

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Key words: (Si,Fe)-MCM-22 zeolite; isomorphous substitution; toluene disproportionation; p-xylene

8. Ioana FECHETE, Angelique SIMON-MASSERON, Emil DUMITRIU, Doina LUTIC, Philippe CAULLET and Henri KESSLER

The role of acidity of CeH-EMT-type zeolite for catalyzing toluene alkylation with methanol to xylenes

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Key words: CeH-EMT-type zeolite; acidity; xylenes

9. Mihaela MANEA, Gheorghe BREBEANU et Lazar AVRAM

Étude relative à l’utilisation de minéraux argileux pour la separation des composes asphaltiques du pétrole
Study relative to the use of clay minerals for the separation of asphaltic compounds from crude oil

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Key words: minéraux argileux, resins, résidus pétroliers, SAAF, FTIR

10. Alexandru CECAL, Anca Irena BALAN, Nicoleta MELNICIUC-PUICA and Karin POPA

Radiochemical method based on the backscattered β-rays for the study of nucleation process

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Key words: β-rays backscattering, crystal growth, double sulfates, nucleation process, oxalates