Volume 13, No. 3 (2012)
Articles
THE SEVENTH FRENCH-ROMANIAN SYMPOSIUM OF APPLIED CHEMISTRY “COFrRoCA - 2012” - CHRONICLE<br/> LE SEPTIEME COLLOQUE FRANCO-ROUMAIN DE CHIMIE APPLIQUEE – « COFrRoCA 2012 » - CHRONIQUE
I.C. ALEXA
Arrivé déjà à la septième édition, le Colloque Franco-Roumain de Chimie Appliquée s'est déroulé entre 27 et 29 juin 2012 en Roumanie, à l'Université « Vasile Alecsandri » de Bacău Cette manifestation bisannuelle, organisée par le Département d’Ingénierie Chimique et Alimentaire de la Faculté d’Ingénierie - Université « Vasile Alecsandri » de Bacău sous l’égide de la Société Roumaine de Chimie, en collaboration avec l’équipe du Pr. Gérald Guillaumet de l’Institut de Chimie Organique et Analytique de l'Université d'Orléans, et les collègues: Pr. Pierre Grandclaudon – ENSC, Université Lille I, Pr. Valérie Thiery – Université La Rochelle, Pr. Gholamreza Djelveh, Pr. Yves Troin – ENSC, Clermont - Ferrand, de France, a occasionné de nouveau le rencontre des chimistes francophones.
THE CHEMISTRY, YOUNG AND SOCIETY<br/> LA CHIMIE, LES JEUNES ET LA SOCIETE
MIRELA SUCEVEANU
Après leur première participation au COFrRoCA, en 2008, les élèves et professeurs de lycées du Bacău ont eu l’opportunité d’être invités avec d'autres jeunes chercheurs au Septième Colloque Franco-Roumain de Chimie Appliquée, qui a eu lieu entre 27 et 29 juin 2012 en Roumanie, à l'Université « Vasile Alecsandri » de Bacău. Les travaux de la section C, intitulée « La chimie, les jeunes et la société », déroulé en 28 juin 2012, ont été dédiés aux préuniversitaires et étudiants. Cette manifestation a été organisée par le Département d’Ingénierie Chimique et Alimentaire de l'Université « Vasile Alecsandri » de Bacău avec ses collaborateurs, sous l’égide de la Société Roumaine de Chimie – Filiale du Bacău, dont le président est le Professeur Adriana Fînaru. L’organisation de cette manifestation s’encadre dans la stratégie de la Société de Chimie de Roumanie pour soutenir les disciplines de la chimie sous tous ses aspects, d’encourager l’étude de la chimie dans les écoles et lycées, d’orienter les jeunes vers les professions liées de chimie et de populariser la chimie. Ainsi, on peut souligner que 58 de participants parmi des élèves, étudiants et jeunes chercheurs ont assisté aux ouvrages du colloque, mais aussi ont participé dans la section « La chimie, les jeunes et la société ».
USE OF STRONG ACID RESIN PUROLITE C100E FOR REMOVING PERMANENT HARDNESS OF WATER – FACTORS AFFECTING CATIONIC EXCHANGE CAPACITY
BOGDAN BANDRABUR(1), RAMONA-ELENA TATARU-FĂRMUŞ(2), LILIANA LAZĂR(2*), LAURA BULGARIU(2), GHEORGHE GUTT(1)
This paper experimentally investigates the performance and capacity of Purolite C100E commercial resin recommended for water softening applications in the food industry. The practical ion exchange capacity and the softening process efficiency are studied in batch mode as a function of the sorption specific process factors. Optimum operation conditions were determined as initial pH 7.1, resin dose 8 g dry resin•L-1, temperature 25 oC, contact time of 360 min, and in those conditions the retention capacity for the Ca2+ ions is 17.18 mg•g-1 that corresponds to a removal efficiency equal to 85.7%.
USE OF EXPERIMENTAL DESIGN COUPLED TO SRC TO PREDICT BISCUIT FLOUR QUALITY <br/> UTILISATION DES PLANS D’EXPERIENCE COUPLE A LA SRC POUR PREDIRE LA QUALITE DE LA FARINE BISCUITIERE
MOHAMED MAMOUMI(*), HANANE FIKRI, MOHAMED ZAHOUILY
We developed an effective predictive tool, reliable, fast and inexpensive, that allows the determination of the flours profiles and their use for different types of biscuits technologies. We chose an extruded biscuit with organoleptic quality defects (cracks and sticking). We defined first the levels of standards in relation to the SRC (SRC type 4: water, sodium carbonate, lactic acid and sucrose) in order to have cookies without cracks and sticking defects. We used the design of experiments to optimize the number of industrial tests to be performed on our product: 4 factors (4 SRC) and 2 responses (cracks and sticking). Furthermore, we demonstrated the impact of the presence of each factor on the absence or presence of the above-mentioned defects. So it shows the significant impact generated by the SRC water and sodium carbonate on the crack defect and the SRC sodium carbonate crucial effect on cookies sticking. Furthermore, our research has improved the quality of biscuits sold on the national market. We have increased the industrial production capacity (by 45 %) by reducing stoppages due to poor quality of flour for making these biscuits time.
SYNTHESIS AND INFRARED STUDY OF SOME NEW SnC2O4Cl2 ADDUCTS AND COMPLEXES
HASSAN ALLOUCH, LIBASSE DIOP(*)
Eight new SnC2O4Cl2 adducts and derivatives have been synthesized and studied by infrared. Ionic discrete structures have been suggested on the basis of infrared data, the environment around the tin (IV) centre being tetrahedral or octahedral.
OXIDATIVE STRESS BIOMARKERS IN MUSSELS SAMPLED FROM FOUR SITES ALONG THE MOROCCAN ATLANTIC COAST (BIG CASABLANCA)
LAILA EL JOURMI, ABDESSAMAD AMINE, NADIA BOUTALEB, HANANE LABBARDI, SAID LAZAR(*), SAID EL ANTRI(**)
Catalase (CAT) activity and malondialdehyde (MDA) level in whole bodies of the mussel perna perna, collected from four stations along the Moroccan Atlantic coast (Big Casablanca area), were monitored to evaluate stress effects on mussels collected from the selected sites. The oxidative stress biomarkers showed statistically significant differences at the polluted sites when compared to the control ones. In general, our data indicated that CAT activity and MDA concentration are a higher and significant (p < 0.05) in mussels collected at polluted site when compared to specimen sampled from control ones. In conclusion, the oxidative stress biomarkers response obtained for October 2010 and 2011, clearly demonstrate the potential presence of different contaminants in Site 4 and Site 3 reflecting the intensity of pollution in these areas.
AMINO PHENYLARSENIATO ADDUCTS OF SnPh3Cl (R = Bu, Ph) : SYNTHESIS AND INFRARED STUDY
BOCAR TRAORÉ, LIBASSE DIOP*, MAMADOU SIDIBÉ
Six new phenylarseniato adducts and derivatives containing SnR3 (R = Bu, Ph) residue have been synthesized and studied by infrared spectroscopy. The suggested structures are discrete, the anion behaving as a bi- or tri- dentate ligand. When the cation is involved through hydrogen bonds, supramolecular architectures are obtained.
NEW PERCHLORATO ADDUCTS: SYNTHESIS AND INFRARED STUDY
OMAR GUEYE, LIBASSE DIOP*
Five perchlorato adducts have been synthesized and studied by infrared. The structures are discrete, the perchlorate anion behaving a monodentate or a bidentate ligand.
ANTIMONY HALIDES AND HgX2 (X = Cl, Br) AMINE ADDUCTS: SYNTHESIS AND INFRARED STUDY
NDONGO GUEYE(1), LIBASSE DIOP(*), LAMINE DIOP(2)
Eight new SbF3, SbCl5 and HgX2 (X = Cl, Br) amine adducts have been synthesized and their infrared study carried out. Discrete structures have been suggested on the basis of elemental analysis and infrared data, the coordination number of antimony varying from five to nine, while the environment around Hg is tetrahedral.
Me4NO2CSO3H.2SnPh3Cl AND enH2O2CSO3.SnPh3Cl SYNTHESIS AND INFRARED STUDY
DAOUDA NDOYE(1), LIBASSE DIOP(1*)
Me4NO2C-SO3H.2SnPh3Cl and enH2O2C-SO3.SnPh3Cl are obtained on allowing Me4NO2C-SO3H and enH2O2C-SO3 to react with SnPh3Cl in respectively mixed solution (ethanol/water) or ethanolic solution in specific ratios. Their infrared studies have been carried out and structures as dimers, suggested when hydrogen bonds are involved.