نتایج جستجو برای: shielded
تعداد نتایج: 2924 فیلتر نتایج به سال:
INTRODUCTION Shielded RF coils have been investigated since the earliest days of MRI, taking the form of the “Zabel coil” [1] a shielded transmission line coil, coils over ground planes, and more recently microstrip coils, particularly for use at high-fields [2]. Some authors have stated that RF shields are essential for 7T surface coils over 10 cm in diameter [3], and others have successfully ...
The sterically shielded terpyridine was prepared, both as a new ligand and as part of the four-station nanoscaffold . Mixing of terpyridine , the parent phenanthroline and the shielded phenanthroline in the presence of Zn(2+) (1 : 1 : 1 : 1) furnished quantitatively the inverse HETTAP complex [Zn()()](2+) by self-sorting, while in the presence of Cu(+) the HETPHEN complex [Cu()()](+) was prefer...
Motivation There is a wide-ranging consensus that co-ordination in development policy needed for aid effectiveness. However, our research reveals number of surprising and significant gaps existing scholarship. Development Palestine has not been researched the phenomenon as “shielding” against domestic contestation remains underexamined. Purpose This article aims to provide better understanding ...
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