نتایج جستجو برای: descaling
تعداد نتایج: 94 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...
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...
The past decade has witnessed a resurgence of interest in the geographies of children’s lives, and particularly in engaging the voices and activities of young people in geographical research. Much this growing body of scholarship is characterised by a very parochial locus of interest – the neighbourhood, playground, shopping mall or journey to school. In this paper I explore some of the roots o...
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