abstract the groines are structures which are use to protected the river bank and to form the water way .the most important problem of groynes is scour at around it that makes breaking and overturning the groynes. because of the less researches at about l-head groynes and open groynes ,this article considers the amount of scour in this type of groynes. so because of this have been used the lace...

block ramps are hydraulic structures which are commonly used in river restoration projects. especially in the last few decades, the use of this type of structures have become more and more popular. they furnish a correct balance between the hydraulic functioning and the environmental care, as they minimize the impact on the environment in which they are located. in addition, they can be conside...

Clean drinking water. It is something that the public has pretty much taken for granted for the past hundred years. The public has little idea and, perhaps understandably, little interest, in the many people and agencies struggling daily to ensure that drinking water remains uncontaminated. But our environment is changing, new pathogens are emerging, drinking water systems are aging, and govern...

Serum levels of alpha1-antitrypsin (alAT) were measured by radial immunodiffusion and phenotypes were determined by electrofocusing in acrylamide gel in 39 patients with hepatocellular carcinoma (HCC) positive for serum hepatitis B surface antigen (HBsAg), 41 patients with HCC negative for serum HBsAg, and 160 ageand sex-matched hospital controls. There was no difference between the control ser...