Bøger af Ahmed Hassan

This picture book is a story, lesson, guide, and inspiration to all children, but especially to those dealing with trauma. This and future wisdom-rich African proverb stories are intended to expand the narrative of nonfiction inclusion in social emotional learning (SEL) curricula. Each book in the series helps children move forward with confidence and healthy coping skills..

Medical uses of ultrasound came about shortly after the close of World War II, derived from underwater sonar research. Initial clinical applications monitored changes in the propagation of pulses through the brain to detect intacerebral hematoma and brain tumors based on the displacement of the midline. Ultrasound rapidly progressed through the 1960s from simple "A-mode" scans to "B-mode¿ application and compound "B-mode" images using analog electronics. Advances in equipment design, data acquisition techniques, and data processing capabilities have led to electronic transducer arrays, digital electronics, and real time image display. This progress is changing the scope of ultrasound and its applications in diagnostic radiology and other areas of medicine, such as high resolution, real time imaging, harmonic imaging, 3D data acquisition, and power Doppler are a few of the innovations introduced into clinical practice.

This study includes the determination of Trifluoperazine hydrochloride (TFPH) and Tetracaine hydrochloride (TCH) drugs by conventional ion-selective electrode (ISE) and flow injection potentiometry (FIP). Chapter one describe general introduction about ISE and FIP with review of its applications in pharmaceutical analysis. While chapter two describe chemicals, apparatus, preparation of standard solutions, and construction of membrane electrodes. Chapter three and four showed the results and discussion of TFPH and TCH ion-selective electrodes. The electrodes were characterized in terms of composition, usable pH range, life span, response time and the selectivity coefficient. The best electrodes were successfully applied for the determination of TFPH and TCH in pharmaceutical formulations. Chapter five and six describe the results and discussion of TFPH and TCH PVC-based membranes containg the ionophores ¿-, ¿- and ¿-cyclodextrins, dibenzo-18-crown-6 and dibenzo-30-crown-10 ether and their response towards TFPH and TCH using FIP. A FIP condition was also studied. The best sensors were applied to the determination of TFPH and TCH in pharmaceutical preparations and human urine.