The aquatic ecosystem of the River Ravi is facing serious challenges due to anthropogenic activities. The aim of this research was to determine the concentration of some pesticides, polychlorinated biphenyls (PCBs) and polycyclic aromatic hydrocarbons (PAHs), in muscle tissue of Labeo rohita from the River Ravi in order to determine the health risks associated with the eating of this popular fish. Gas chromatography was used for the detection of the first two groups of pollutants and gas chromatography/flame ionization detection was used for the latter.

The present study was conducted to estimate genetic diversity of hybrid produced by two major carps (Labeo rohita and Catla catla) using DNA fingerprinting RAPD-ISSRs assay. A total of 65 RAPD-ISSR combinations were studied to check polymorphism among the accessions. 866 loci were amplified with an average of 13.32 loci per primer and 45.26% were found informative. Primers: DDA31-ISSR1 and DDA32-ISSR2 were most informative producing 12 polymorphic bands each. A similarity of 82% and 63% was exhibited by C. catla and their hybrids and L. rohita and their hybrids, respectively.

Energy transfer between poly (9,9'-di-n-octylfluorenyl-2,7-diyl) (PFO) as a donor in presence of TiO2
nanoparticles (NPs) and Fluorol 7GA as an acceptor with different weight ratios has been investigated by
steady-state emission measurements. Based on the absorption and fluorescence measurements, the
energy transfer properties, such as quenching rate constant (kSV), energy transfer rate constant (kET),
quantum yield (fDA), and lifetime (tDA), of the donor in the presence of the acceptor, energy transfer