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In this research work a rapid reversed phase liquid chromatographic method was developed and validated for Sulphacetamide Sodium (SCS) and Prednisolone Acetate (PAC) in ophthalmic suspension. Chromatographic separation was achieved by using ammonium acetate buffer and methanol (0.02M; pH 4.0) (30:70 V/V) at a flow rate of 1.5 ml/min. The effluent from column was monitored by means of Diode array detector at 271 nm and 245 nm for SCS & PAC. The retention time for SCS was 1.8 and for PAC was 3.6. A good linear relationship was observed over the concentration ranges 0.016-10 g/ml and 0.64-400...

The objectives of the current study were to examine the impact of macroeconomic factors on the stock returns volatility, pricing of risk, asymmetry and leverage effect, and volatility dynamics on comparative bases of developed (NYSE) and emerging (PSX) markets. Furthermore, all these aspects were also analyzed with regard to various firm's features. The stock return volatility of all the firms from all the sectors of both NYSE and PSX are considered for the period from January 3, 2000, to December 31, 2015. Three time-series models were applied, i.e. GARCH (1, 1) for the relationship between...