An efficient and cost effective adsorbent, activated carbon (UTAC) derived from used tea (UT) for the removal of As(III) from aqueous solutions was developed. To increase adsorption, UTAC was then impregnated with (magnetite) iron oxide particles (Fe-UTAC). The prepared adsorbents were characterized by XRD, SEM/EDX, FTIR and surface area analyzer. A comprehensive kinetic study of arsenite adsorption onto Fe-UTAC was conducted at 298-318 K and pH 8. The Richenberg model confirmed film diffusion to be the main rate limiting step. The removal of As(III) from aqueous solution onto Fe-UTAC was carried out as a function of temperature, concentration and pH. The sorption capacity (mol g -1 ) of Fe-UTAC was observed to increase with increase in arsenite concentration while a decrease in the As(III) uptake was observed by increasing the temperature of the system. The sorption capacity of Fe-UTAC was almost three and six times larger than that of UTAC and UT respectively. The effect of pH on the arsenite adsorption was significant in the pH range 7-8 which may be correlated with the stability of Fe-UTAC as no release of iron from Fe-UTAC was observed. The mean free energy calculated from DR mechanism confirmed adsorption to be chemisorption and followed ligand exchange mechanism. The thermodynamic parameters confirmed adsorption to be exothermic, spontaneous and favorable.

HER2/neu protein is credibly overexpressed in colon and gastric adenocarcinomas in immunohistochemistry. There is significant association between grade of tumor and HER2/neu protein overexpression.

Objective: Early detection of diastolic dysfunction in hypertensive patients to reduce complications and improve outcome. Place of Study: East Medical and Cardiology wards of Mayo Hospital Lahore. Study Design: A descriptive cross-sectional study. Patients and Methods: 51 hypertensive patients between 50 - 80 years of either sex enrolled through out patient department of Mayo Hospital Lahore underwent Doppler Echocardigraphy and data was analyzed by using Chi-square and Students `t` tests. Results: The percentage of left ventricular hypertrophy (LVH) was 66.66%. On comparing hypertensive patients with and without LVH, E and A wave velocities, E:A ratio, deceleration time and isovolumic relaxation time were similar. Conclusion: 33.33% of patients had no LVH in the presence of diastolic dysfunction so LVH was not an independent factor associated with abnormal flow patterns in hypertensive patients with normal systolic contractility. Impaired relaxation was the predominant pattern of diastolic dysfunction an d increased further with age.