منابع مشابه
Rare Earth Elements Profile
Definitions and characteristics The rare earth elements (REE) (sometimes referred to as the rare earth metals) are a group of 17 chemically similar metallic elements, including the 15 lanthanides, scandium and yttrium. The lanthanides are elements spanning atomic numbers 57 (lanthanum, La) to 71 (lutetium, Lu) (Table 1). The lanthanides all occur in nature, although promethium, the rarest, only...
متن کاملRare-Earth Separation Using Bacteria
The rare-earth elements are critical to many green energy technologies but are difficult to separate from one another because of their chemical similarity. We demonstrate an alternative, biogenic method based on the adsorption of lanthanide to the bacterium Roseobacter sp. AzwK-3b, immobilized on an assay filter, followed by subsequent desorption as a function of pH. The elution desorption data...
متن کاملRare earth spectrocopy for biophotonics
Luminescence is now extensively used in biology since it constitutes as a very sensitive way of investigations. Several applications of fluorescence concern immunoassays, DNA hybridization, protein interactions, cell imaging, Lab-on-chip etc.;; As non biological fluorescent probes, organic dye molecules and semiconductors quantum dots are the most popular. However, they suffer from drawbacks wh...
متن کاملRare earth-doped glass microbarcodes.
The development of ultraminiaturized identification tags has applications in fields ranging from advanced biotechnology to security. This paper describes micrometer-sized glass barcodes containing a pattern of different fluorescent materials that are easily identified by using a UV lamp and an optical microscope. A model DNA hybridization assay using these "microbarcodes" is described. Rare ear...
متن کاملRare-Earth Doped Optical Fibers
An optical fiber becomes active by doping its core with one or more atomic elements, usually (but not restricted to) rare-earths (RE’s), more specifically, the lanthanides that occupy the atomic numbers 57 to 71 of the periodic table. As it will be mentioned later in more detail, they use three electrons in bonding to the condensed materials such as crystals and glasses to become triply ionized...
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ژورنال
عنوان ژورنال: Progress in Materials Science
سال: 2013
ISSN: 0079-6425
DOI: 10.1016/j.pmatsci.2013.06.002