نتایج جستجو برای: scaling and descaling
تعداد نتایج: 16837838 فیلتر نتایج به سال:
Fish screens at hydroelectric dams help to protect rearing and migrating fish by preventing them from passing through the turbines and directing them towards the bypass channels by means of a sweeping flow parallel to the screen. However, fish screens may actually be harmful to fish if the fish become impinged on the surface of the screen or become disoriented due to poor flow conditions near t...
Background and Objective: Water corrosion and scaling are known as destructive phenomenon of drinking water quality and water facilities. In this study, the groundwater tendency to corrosion or scaling in source water, water storage reservoirs and distribution system were studied. Simultaneous use of some qualitative and a quantitative index along with statistical analyses to assess the water s...
Methods From July 2010 to April 2013, 95 consecutive patients (mean age, 63 ± 20 years, mean LVEF, 50% ± 15 %), with severe mitral valve regurgitation ( ischemic 17%. PML-prolapse 7.3 %. AMLprolapse 2, 1%. PML and AML-Prolaps 6.3 %. Endocarditis 2.1 %. Barlow 1%. Cleft with AML+ PML Prolapse 11,5%. AML. Descaling 5, 2%.) underwent mitral valve repair. Anticipated length of loops was assessed wi...
In this work, we proposed an effective method based on cubic and pantic B-spline scaling functions to solve partial differential equations of fractional order. Our method is based on dual functions of B-spline scaling functions. We derived the operational matrix of fractional integration of cubic and pantic B-spline scaling functions and used them to transform the mentioned equations to a syste...
Abstract Background: corrosion and scaling are of the most important characteristics of drinking water, affecting public health and water industry economy. The aim of the present study was to evaluate the corrosion and scaling potential of potable water supplied by Saqqez Rural Water and Wastewater Company. Materials and Methods: this was a descriptive study conducted on 142 samples taken from ...
Introduction & Objective: Chronic periodontitis is an inflammatory disease of the tooth supporting tissues by a specific group of microorganisms, leading to progressive destruction of the periodontal ligament. The aim of this study was to evaluate the effect of amoxicillin and metronidazole as an adjunct, after scaling and root planning in reducing pocket depth and clinical attachment loss in...
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