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El Moussaouiti M.,Laboratoire Of Chimie Physique Des Materiaux | Talbaoui A.,Laboratoire Of Biochimie Immunologie | Gmouh S.,French National Center for Scientific Research | Benjouad A.,Laboratoire Of Biochimie Immunologie | And 2 more authors.
Journal of the Indian Academy of Wood Science | Year: 2010

The composition and the antibacterial activity of the essential oil, isolated by hydrodistillation from the wood burl parts of Tetraclinis articulata from Morocco, were analyzed by GC and GC/MS. Fifteen compounds accounting for about 96% of the oil were positively identified. Cedrene (23%), thymol (22%), 3-tert-butyl-4-methoxyphenol (19%), cedrenol (9.6%), muurolene (5.4%), and sclarene (3%) were found to be the main constituents. The essential oil was tested for antimicrobial activity against four different genera of bacteria: Enterococcus faecalis, Escherichia coli, Klebsiella pneumoniae and Streptococcus D. and exhibited considerable inhibitory effects against all bacteria tested with MIC and MIB close to 1.25 μl/mL. The findings of the present study suggest that Tetraclinis articulata oil from hydro-distillation of sawdust from burl wood collected from artisans, has a potential to be used as bactericide. © Indian Academy of Wood Science 2010. Source


Tridane M.,Laboratoire Of Chimie Physique Des Materiaux | Tridane M.,Center Regional Des Metiers Of Leducation Et Of La Formation Du Grand Casablanca | Belaaouada S.,Laboratoire Of Chimie Physique Des Materiaux
Journal of Materials and Environmental Science | Year: 2015

A new cyclotriphosphate hexahydrate of manganese and ammonium, Mn(NH4)4(P3O9)2.6H2O, was obtained as polycrystalline samples by the method of ion-exchange resin. Its crystallographic characterization, vibrational study and thermal behavior are given. Mn(NH4)4(P3O9)2.6H2O crystallizes in the monoclinic system, C2/m, with the following unit cell parameters : a = 13.178(3)Å, b = 11.030(2)Å, c = 9.965(2)Å, c = 126.76(2)° and Z = 2. The P3O9 ring of Mn(NH4)4(P3O9)2.6H2O has a Cs symmetry . The intermediate products of dehydration of Mn(NH4)4(P3O9)2.6H2O are Mn2P4O12 and Mn2P2O7. The total dehydration and calcination of Mn(NH4)4(P3O9)2.6H2O lead to a cyclotetraphosphate, Mn2P4O12. The thermal behavior of the title compound has been investigated and interpreted by IR absorption and X-ray diffraction experiments. Mn(NH4)4(P3O9)2.6H2O, Mn2P4O12 and Mn2P2O7 have been found to have a wide range of applications and can be used as catalysts, ion exchangers, reactants in ionic conditions, intercalation reactions, superphosphate fertilizers and as inorganic pigments in ceramics. Source


Fahim I.,Laboratoire Of Chimie Physique Des Materiaux | Kheireddine A.,Laboratoire Of Chimie Physique Des Materiaux | Belaaouad S.,Laboratoire Of Chimie Physique Des Materiaux
Journal of Optoelectronics and Advanced Materials | Year: 2013

The corrosion inhibition of mild steel in 1 M HCl solution by sodium triphosphate (STPP), Na5P3O10, has been studied using potentiodynamic polarisation as an electrochemical technique, weight loss and UV-vis spectrophotometric measurement. The results of weight loss and Tafel polarization measurements showed that this compound has fairly good inhibiting properties for steel corrosion in acidic bath, with 87% inhibition efficiency at optimum concentration 10-3 M. The inhibition is of a mixed anodic-cathodic nature. The adsorption behaviour of the investigated compound is found to obey Langmuir adsorption isotherm. Negative value was calculated for the energy of adsorption indicating the spontaneity of the adsorption process. The formation of complex between metal cations and sodium triphosphate is also proposed as additional inhibition mechanism of mild steel corrosion. Source

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