The aim of the present study is to study some physical, mechanical and aerodynamic properties of quinoa seeds (Chenopodium quinoa Willd.), to help in designing and developing of specific machine and their operations such as harvesting, cleaning and milling processes. The properties were determined at moisture content of quinoa seed 11.60% d.b.Three principal dimensions (length, width and thickness) of quinoa seeds were measured using image-processing technique. The highest value of seed length, width and thickness were 2.91, 2.68 and 1.10 mm respectively, while the lowest value of seed length, width and thickness were 1.38, 1.12 and 0.49 mm respectively. The highest value in dynamic angle of repose 30.0° for plastic while the lowest value in dynamic angle of repose 26.3° for galvanized sheet. The lowest values of static coefficient of friction was 0.46 with plywood while the highest value was 0.65 with glass. The seeds gave values of 0.79 m/s and 88.25for average terminal velocity and average Reynolds number respectively, so, the flow was laminar.1-INTRODUCTION uinoa originates from South America where it grows at high altitudes. Bolivia and Peru are the biggest exporters with 88% of the worldwide production, followed by the United States of America with 6%. The seed is resistant to drought and frost and frequently is cultivated on poor soils (Brenes et al., 2001). Quinoa is a complete food with high-nutritional value due mainly to its high content of good quality protein. Besides protein content, it also contains minerals and vitamins like vitamin B, vitamin C and vitamin E.

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The present study aimed to determine and recognize the physical and mechanical properties as an important role in designing and developing of specific machines and their operations such as planting, harvesting and grading. The physical and mechanical characteristics of Pomegranate seeds were obtained for one variety of Punica granatum. For each of the dimensions, the Pomegranate seeds gave the highest value in width of 13.8± 0.53 mm and lowest value in height of 8.0 ± 0.59mm. The highest value of repose angle was 32.5º for ply wood while the lowest value was 25º for galvanized sheet. The Pomegranate seeds gave the lowest value of static coefficient of friction of 0.29 for ply wood while the highest value was 0.44 for glass.

Objective:The objective of this study was to evaluate the efficacy and safety of the Dornier lithotripter S II system in the treatment of ureteral calculi.Patients and Methods:A total of 97 cases which consists of 54 males and 43 females with ureteral stones were treated by extracorporeal shock wave lithotripsy (ESWL). Mean age was 42.6 years. Inclusion criteria were solitary radiopaque ureteral stones of radiological stone size of ≤1 cm. The stones were not impacted, with normal kidney functions. Procedure time, number of shocks, energy used, number of sessions and complications were reported. The outcome of ESWL was also recorded.Results:Stones were in the abdominal (upper ureter) in 50% of patients, in pelvic (middle ureter) in 47% of patients. All patients had unilateral stones and the mean stone size in maximum length was) 10 mm). Good dye excretion passing the stone was noted in all patients. Mild hydronephrosis was found in 85% of cases. A total of 49 cases were treated by a single session, while in 35% of cases two sessions were enough and 16% received three sessions. The average number of shocks per session was 3125. The average number of shocks per patient was 5962.5 shocks and average energy was 204.3 Joules. The overall stone-free rate 3 months after lithotripsy was 94%. After a single session of lithotripsy, 49 patients (49%) became stone-free. Stone free rates after ESWL for upper, middle ureteral stones were 94%, 95.7% respectively. Additional procedures were needed in only 6 cases (6%) to render patients stone-free after lithotripsy. No serious complications occurred.Conclusion:The Dornier lithotripter S II is very effective in the treatment of ureteral calculi with no major complications.