The ameliorative effects of ceftriaxone and vitamin E against cisplatin-induced nephrotoxicity

Environmental Science and Pollution Research - Nephrotoxicity is a common adverse effect of treatment with cisplatin (CDDP). This study was performed to evaluate the antioxidant and...     

Effect of Gamma Radiation on the Properties of Crosslinked Chitosan Nano-composite Film

Chitosan nano-composite film crosslinked by citric acid and with glycerol as plasticizer and MgO as antibacterial agent was prepared by casting method. MgO nanoparticles were synthesized via calcination method in furnace at 500 °C for 4 h and characterized by X-ray diffraction and transmission electron microscope. The chitosan nano-composite film with composition chitosan/citric/glycerol/magnesium oxide (1 wt%:1 wt%:75 vol%:10 wt%) has high mechanical properties than other films. The effects of different irradiation doses on the mechanical, thermal and antibacterial activity were investigated. The tensile strength enhanced by increasing irradiation dose up to 10 kGy and the elongation negligible changed as irradiation dose increased. The thermal stability slightly increased up to dose 2.5 kGy then decreased with dose increment. The antimicrobial activity film was studied against white mulberry-borne bacterial pathogens either Gram positive or Gram negative bacteria and has positive impact of gamma irradiation on the antimicrobial activity. The use of the selected chitosan nano-composite film which irradiated by dose of 2.5 kGy and has magnesium oxide of average particle size 54.3 nm as new packaging materials found to improve storage quality and shelf-life of mulberry fruit.     

Effect of pollutant aerosols on spectral atmospheric transmissivity in Cairo

Spectral atmospheric transmissivity has been greatly affected by air pollutants in Cairo atmosphere. This has been studied by measuring the energy of solar radiation, selecting four bands at different wave-lenghts. Three selected bands are in the visible (blue 440 nm., green 500 nm., and red 640 nm.), while the fourth band is in the infrared region (880 nm.). The Cairo atmosphere was found to be greatly polluted by fine particulates, which were held in suspension for a longer time than coarse pollutants. The transmissivity of the spectral radiation showed a clear wavelength dependence comparable to particulate sizes found in different concentrations. The transmissivity was found to be highest for the infrared band, followed by the red and then the green bands, and the lowest was for the blue band.