This work concerns the study of the species Volutaria lippii syn. Centaurea lippii, belonging to the Asteraceae family; a plant of the Algerian flora which has been the subject of very few previous studies. Our work began ...

This work is devoted to the phytochemical study; structural determination and biological evaluation of natural substances isolated from a species of the Lamiaceae family: Thymus munbyanus subsp. ciliatus (Desf.) Greuter & ...

Considered as the energy transporter of the future, hydrogen seems to be the miracle solution to overcome the current energy and environmental crisis. This may be true provided that all the problems underlying in its life ...

If a problem has a unique solution, but this solution is not continuous with respect to small variations of data this problem is ill posed. The methods used to stabilize ill-posed problems are known to stabilize. The ...

The work presented in this thesis concerns the synthesis and study of structural and optical properties by two different approaches; experimental and theoretical, of new complexes of Schiff bases (SIC and NIC) coordinated ...

This work deals with Ni/MgO intended for use as antibacterial agents. The samples were prepared by impregnation (named NMI) followed either by irradiation under 60Co radiation (NMR) or calcined at T ≥ 100°C (NMC(T)). Various ...

Structure and spectroscopy of halogeno-methyl of benzene products of biological interest In the interest of research on biologically active organic products, our thesis work consists of a spectroscopic and structural ...

Samples of pure zinc aluminates (ZnAl2O4) and doped ZnAl2O4 with both lead (Pb2+) at different ratios (0, 0.5, 1, 1.5, 2, and 2.5% mol) and a constant amount of lanthanum (La3+: 1% mol), were prepared by the citrate ...

Nicotiana glauca Graham (Solanaceae), or tree tobacco, is found in dry arid climates of North America, Africa and Europe. It has been reported to have both toxic and medicinal properties. The main aim of this study was ...