Cadmium (Cd) is a highly toxic heavy metal that is naturally present in the environment. Chronic exposure to Cd causes hepatotoxicity and nephrotoxicity. The present study aimed to study the protective effect of melatonin, methionine and zinc against histopathological, histochemical and proliferative effects of cadmium on the kidney of rats. A total of 80 female albino rats were included in thi...

In the past 25 years an identifiable interest in using children's literature in mathematics learning emerged (Clyne and Griffiths, 1991; Welchman-Tischler, 1992; Hong, 1996; Hellwig etal., 2000; Haury, 2001). We critically review the rationales given for the use of picture books in mathematics learning, with a special focus on geometry due to its underrepresentation in this body of literature a...

References: 1) Bell.G.I. etal. (1983) Nature 304, 368-371. 2) Weber.J.L. and May.P.E. (1989) Am. J. Hum. Genet. 44, 3 8 8 3 % . 3) Schroeder.W.T. et al. (1984) Cytogenet. Cell Genet. 38, 76-79. 4) Weber,J.L. etal. (1990) Nucl. Acids Res. 18, 4637. Source/Description: The polymorphic (TG)n repeat begins at base pair 3833 in intron D of the human interleukin 9 gene (IL-9) on chromosome 5 (1). The...

This study (1975-1977) examines the effect of man-made structures on natural sand bottom communities in shallow water in San Diego County, southern California, USA. While there were shallow scour effects to 15 m around some artificial reefs, the reefs had no measurable effect on sand ripple patterns, grain size, organic carbon or infauna beyond the scoured areas. Foraging by reef-associated fis...

pollution has become a very serious threat to our environment. monitoring pollution is the rst step toward planning to save the environment. the use of dierential equations, monitoring pollution has become possible. in this paper, a ritz-collocation method is introduced to solve non-linear oscillatory systems such as modelling the pollution of a system of lakes. the method is based upon bernoul...