Chemical - Engineering

The aim of this research is to study the effect of rheological properties ,concentrations of non-Newtonian fluids, particle shape, size and the density difference between particle and fluid on drag coefficient (C) and settling velocity (VS), also this study show the effect drag coefficient (C)and Reynolds' number (Re) relationship and the effect of rheological properties on this relationship.P An experimental apparatus was designed and built, which consists of Perspex pipe of length of 160 cm. and inside diameter of 7.8 cm.

The present study was focusing on the effect of seminal fluid infection on sperm functions and fertilizing capacity of mouse spermatozoa. Two kinds of bacteria were isolated from seminal fluid of 14 infertile patients (23-51 years) during their attendance at the Institute of Embryo Research and Infertility Treatment involves Staphylococcus aureus (Staph. aureus) and Escherichia coli (E. coli), which were identified by biochemical tests and API systems.

    Vapor-Liquid-Liquid Equilibrium (VLLE) systems are complicated systems; they involve both a two phase liquid and a two phase vapor.Obtaining equilibrium data on these systems is very difficult, Vapor-LiquidEquilibrium (VLE) recirculation stills can not be used to obtain accurate VLLE data due to incorrect composition of the recycled condensed vapor to the boiler, modifications are made to these stills to obtain accurate equilibrium data for partial and immiscible liquid systems.Another difficulty when collecting the vapor & liquid samples, a modification