Histopathological changes have been recorded in the gills, liver and intestinal tissue of Labeo rohita
from River Ravi receiving industrial waste. Varying concentrations of Pb and Cu were recorded in
the liver, gills and intestine of Labeo rohita. The pronounced histopathological changes like
degeneration, necrosis and disorganization of lamellae and hyperplasia of epithelial cells was
observed in the gills of the fish collected from a polluted site as compared to the fish from a control

Abstract We aimed to assess the bioaccumulation of selected four trace metals (Cd, Ni, Zn and
Co) in four tissues (muscles, skin, gills and liver) of a freshwater fish Wallago attu (lanchi) from
three different sites (upstream, middle stream and downstream) of the Indus River in Mianwali
district of Pakistan. Heavy metal contents in water samples and from different selected tissues of
fish were examined by using flame atomic absorption spectrometry. The data were statistically compared

We present the first phase-resolved ultraviolet spectroscopy of two polar systems, BL Hyi and EF Eri, in high and intermediate states from the International Ultraviolet Explorer (IUE) during the periods between 1982-1995 and 1979-1991, respectively. The flux curves for the C iv and He ii emission lines for both systems showing variations in their fluxes at different orbital phases are presented. The emission lines are produced in the accretion stream. The reddening for the two polars is found to be 0.00.