No. 7, Juillet 2008

Tome 53, No. 7, Juillet 2008

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1. Florea DUMITRAŞCU, Constantin DRĂGHICI, Barbu MIU, Dan G. DUMITRESCU and Marcel POPA

Symmetrical and non-symmetrical olefinic and acetylenic dipolarophiles in the synthesis of pyrrolo[1,2-b]pyridazine derivatives.

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Key words: pyrrolo[1,2-b]pyridazine, 1,3-dipolar cycloaddition, pyridazinium N-ylides, tetrakis-pyridine cobalt (II) dichromate

2. Horia PETRIDE, Constantin DRĂGHICI, Cristina FLOREA and Maria MAGANU

Some N-mono- and N, N’-disubstituted derivatives of 2-piperazinecarbonitrile.

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Key words: piperazines, conformation, NMR spectroscopy

3. Daniela APREUTESEI and Georg H. MEHL

Bent-core systems based on [1,3,4]oxadiazole core with shape biaxiality.

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Key words: [1,3,4]oxadiazole derivatives, bent-core mesogenic systems, mesomorphic properties

4. Niculae I. IONESCU

Kinetics of adsorption and desorption in solid-gas systems and the logarithmic rate law.

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Key words: adsorption, desorption, logarithmic law

5. Stelian LUPU, Cecilia LETE, Mariana MARIN and Nicolae TOTIR

Electrochemistry of metal hexacyanoferrates and conducting polymers bilayer structures deposited on conventional size electrodes and ultramicroelectrodes. I. Conventional size modified electrodes.

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Key words: hybrid inorganic-organic coatings, modified electrodes, conducting polymers, polythiophene derivative, polyazulene, Prussian Blue, cyclic voltammetry

6. Stelian LUPU, Cecilia LETE, Mariana MARIN and Nicolae TOTIR

Electrochemistry of metal hexacyanoferrates and conducting polymers bilayer structures deposited on conventional size electrodes and ultramicroelectrodes. II. Modified ultramicroelectrodes.

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Key words: hybrid inorganic-organic coatings, modified ultramicroelectrodes, conducting polymer, Prussian Blue, cyclic voltammetry

7. Viorel BRÂNZOI, Florentina GOLGOVICI and Florina BRÂNZOI

Electronically conductive polymers type polypyrrole and polyaniline obtained by electropolymerization onto aluminium substrate.

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Key words: polypyrrole and polyaniline films, electropolymerization, cyclic voltammetry and electrochemical impedance spectroscopy method

8. Minodora PASĂRE, Mircea Ionuţ PETRESCU and Marioara ABRUDEANU

Heat treatment and P effect on Ni-P/SiC coatings hardness.

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Key words: electrolitic co-deposition, solid state solubility extension, microhardness, ISE effect

9. Mohamed NOHAIR et Mohssine El MORRAKCHI

Optimisation d’un modèle de réseau de neurones robuste à partir de la régularisation Bayesienne et la méthode d’autocorrélation pour la prédiction de la temperature d’ébullition des alcanes A quantitative structure-activity relantionships model for the boiling point of alcanes using Bayesian-regularized neural networks.

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Key words: réseaux de neurones, régularisation bayésienne, méthode d’autocorrélation, alcanes, technique de validation croisée

10. Gabrielle Charlotte CHIŢANU, Irina POPESCU, Irina Mihaela PELIN and Mihaela Iuliana AVADANEI

Synthesis and characterization of maleic anhydride copolymers and their derivatives. 4. Synthesis and
characterization of maleic anhydride-acrylonitrile copolymers.

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Key words: maleic anhydride-acrylonitrile copolymers, radical copolymerization, copolymer composition