OBJECTIVES The aim of this study was to evaluate the sealing ability of lateral compaction and tapered single cone gutta-percha techniques in root canals prepared with stainless steel and rotary nickel titanium root canal instruments by fluid filtration method. STUDY DESIGN The root canals were prepared with stainless steel (SS) and nickel titanium (NiTi) instruments. The canals prepared with...

soil is a nonrenewable source that needs considerable management to prevent physical deteriorationby erosion and compaction. compacted soil causes low fertility and yield. the purpose of this study isto investigate the effect of viscoelastic properties of soil and to determine important factors oncompaction. furthermore, stress distribution, prediction of soil compaction and simulation of its e...

soil compaction as a global problem and a multi-dimensional and complex process involving the interaction of climate, soil mashyn- plant- known to have a significant economic and environmental impacts and to sustainable agriculture is an intractable problem.for in order to assess compaction effect on nitrogen mineralization process in soil in form of factorial completely randomized design with ...