Print ISSN: 1681-6900

Online ISSN: 2412-0758

Keywords : Urea

Urea Modified TiO2 Nanoparticles Prepared by Sol-Gel Method to enhance the Photocatalytic Activity under Sunlight

Ban M.Al-Shabander; Ekram A. Ajaj

Engineering and Technology Journal, 2015, Volume 33, Issue 9, Pages 1591-1598

Pure and urea (5wt %) doped titanium dioxide nanoparticles were prepared by sol–gel method. The preparation of pure and urea doped TiO2 nanoparticles were achieved by titanium tetraisopropoxide, hydrochloric acid and ethanol as starting materials and the products were annealed at 600°C to get anatase phase. The prepared materials were characterized by X-ray diffraction analysis (XRD), Fourier transform infra-red spectroscopy (FT- IR), Scanning electron microscopy (SEM) with Energy dispersive X-ray analysis (EDX)and Photoluminescence (PL) spectroscopy. Thephotocatalytic activity of the samples was evaluated by degradation of Methyl Orange (MO) in aqueous solution at concentration (10ppm) under sunlight irradiation. The experimental results reveal that the urea doped TiO2 nanoparticles exhibit an enhanced photocatalytic activity in sunlight compared with that of pure TiO2 nanoparticles.

Histological and Functional study of white male mice testes and kidney treated with Tecrium Polium aqueous extract

Wasnaa Hatif Mohammed

Engineering and Technology Journal, 2010, Volume 28, Issue 20, Pages 6149-6157

The oral administration of the aqueous extract of Teucrium polium to a
mature male mice in daily oral doses of 50 mg/kg body weight (group II) and 100
mg/kg body weight (group III) for eight consecutive weeks were resulted in
significant increase (P<0.05) in the testicular weight in the treated groups in
comparison with control. The aqueous extract affected the spermatogenesis which
demonstrated by an increase in leydig cell, spermatogonia, spermatocytes and
spermatozoa. The hormonal profile was influenced by the aqueous extract. The
testosterone level was significantly increased (P<0.05) in the treated groups, but
no significant differences (P>0.05) in urea and uric acid levels between control
and the treated groups were shown. The kidneys of the group III were affected and
showed degenerative changes and necrosis in nucleolus of cell of tubules and there
is destruction in glumerular by increscent of mesenchymal cells.