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Residue analysis of chlorpyrifos (an organophosphate pesticide) was investigated in different water samples. Analysis was carried out in collaboration with pesticide residue laboratory Kala Shah Kaku due to the availability of latest chromatographic techniques. Chlorpyrifos was analyzed in different samples of water collected from different sites of Lahore. Sample preparation was done by using Solid Phase Extraction (SPE) technique. Analysis was carried out using High Performance Liquid Chromatography (HPLC). Acetonitrile, methanol solvents were used as mobile phase to achieve the...

In the last twenty years, the work was done on the different problems related to the Qualitative Theory of differential equations. But during the last few years, the interest surrounded around the well-known Hilbert's Sixteenth Problem which he posed at Paris Conference of International Congress of Mathematicians in 1900, together with other twenty-two problems 17]. In this book we are mainly concerned in the second part of Hilbert's sixteenth Problem, which poses the question of maximal number and relative position of limit cycles of the polynomial system of the form: (A) in which P and Q...

Lots of efforts have been made to make Pakistan a Polio free country for the last two decades, but, Pakistan struggle to be polio free country is not prolific. Pakistan health sector developed vigorous strategies for the eradication of polio in Pakistan, but value of all the strategies is only well documented pieces of paper in plan development due to ineffective implementation. The purpose of the study is identifying the potential factors that are influencing the implementation of polio program in Pakistan. Existing structure, Resistance to Change, Vested Interests and Organizational Culture...