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- Bovin, J O, et al.
(författare)
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TEM-tomography of FAU-zeolite crystals containing Pt-clusters
- 1996
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Ingår i: Ultramicroscopy. - : Elsevier BV. - 0304-3991. ; 62:4, s. 81-277
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Tidskriftsartikel (refereegranskat)abstract
- A method for preparing ultrathin sections (- 20 nm) of inorganic solids has been developed using ultramicrotomy of resin-embedded crystal fragments. Undamaged crystals, oriented along a crystallographic direction, could be imaged with transmission electron microscopy (TEM) at a resolution better than 0.5 nm. The true internal structure of the crystals could be investigated by imaging the second in a series of at least three consecutive ultrathin sections. Such TEM-tomography proved that Pt-ion exchanged FAU zeolite crystals, after reduction and oxidation, are occupied internally and randomly of large platinum clusters mainly in the {111-twin planes. TEM-tomography could be useful in man made nanostructures like semiconductors, epitaxial thin films, hard metal coatings, ceramics, catalysts, and biomaterials.
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- JUUL, A, et al.
(författare)
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Serum levels of insulin-like growth factor (IGF)-binding protein-3 (IGFBP-3) in healthy infants, children, and adolescents: the relation to IGF-I, IGF-II, IGFBP-1, IGFBP-2, age, sex, body mass index, and pubertal maturation
- 1995
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Ingår i: The Journal of clinical endocrinology and metabolism. - : The Endocrine Society. - 0021-972X. ; 80:8, s. 2534-2542
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Tidskriftsartikel (refereegranskat)
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