نتایج جستجو برای: vitamin b 12
تعداد نتایج: 1481287 فیلتر نتایج به سال:
On February 29, 2012, Sandoz Canada announced a disruption to the supply of its many injectable medications in Canada, including vitamin B12 (VB12) while it upgraded operations to meet US Food and Drug Administration standards.1 This disruption forced Canadian physicians and pharmacists to find alternative sources or make therapeutic substitutions until the shortage was resolved. This shortage ...
Boron suboxide B6O, the hardest known oxide, has an Rm crystal structure (α-B6O) that can be described as an oxygen-stuffed structure of α-boron, or, equivalently, as a cubic close packing of B12 icosahedra with two oxygen atoms occupying all octahedral voids in it. Here we show a new ground state of this compound at ambient conditions, Cmcm-B6O (β-B6O), which in all quantum-mechanical treatmen...
Radioligand methods are now well established for measurement of serum vitamin B12 and folate. Often these two assays are requested together. Thus a way of doing them simultaneously would save considerable time and expense. The objectives of this study were to determine the precision of a simultaneous assay and to compare it with previously established assays for these vitamins.
BACKGROUND/AIMS Normal or high serum vitamin B-12 levels can sometimes be seen in a B-12 deficient state, and can therefore be misleading. High levels of Methymalonic Acid (MMA) and Homocysteine (HC) have been identified as better indicators of B-12 deficiency than the actual serum B-12 level itself. We evaluated the prevalence of vitamin B-12 deficiency using appropriate cut-off levels of vita...
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