Search results for "Elements"

Cardiac Mechanics of Left Ventricular NonCompaction by Finite Element Modeling

2014

Yttrium and lanthanides in human lung fluids, probing the exposure to atmospheric fallout.

2011

International audience; Inhalation of airborne particles can produce crystallization of phosphatic microcrysts in intraaveolar areas of lungs, sometimes degenerating into pulmonary fibrosis. Results of this study indicate that these pathologies are induced by interactions between lung fluids and inhaled atmospheric dust in people exposed to volcanic dust ejected from Mount Etna in 2001. Here, the lung solid-liquid interaction is evaluated by the distribution of yttrium and lanthanides (YLn) in fluid bronchoalveolar lavages on selected individuals according the classical geochemical approaches. We found that shale-normalised patterns of yttrium and lanthanides have a 'V shaped' feature corre…

Lanthanide complexes as imaging agents anchored on nano-sized particles of boehmite

2011

International audience; The synthesis of boehmite nanoparticles modified with lanthanides (Eu, Tb and Gd) is described. Their synthesis, characterization and in vitro assays with HeLa cells were performed. The nuclear magnetic relaxation dispersion (NMRD) profiles of the two chelating moieties were studied. Imaging data from laser scanning confocal fluorescence microscopy and flow cytometry revealed that the nanoscaffolds were taken up by the cells, distributed throughout the cytoplasm and showed no toxicity. This platform could represent an alternative to silica-based inert matrices as imaging vehicles.

Geochemical behaviour of rare earths in Vitis vinifera grafted onto different rootstocks and growing on several soils.

2014

The geochemical behaviour of lanthanides and yttrium (Rare Earth Elements, REEs) has been investigated mainly in geological systems where these elements represent the best proxies of processes involving the occurrence of an interface between different media. This behaviour is assessed according to features recorded in sequences of REE concentrations along the REE series normalised with respect to a reference material. In this study, the geochemical behaviour of REE was investigated in different parts of Vitis vinifera specimens grown off-soil, on soils of different nature and grafted onto several rootstocks in order to evaluate effects induced by these changes. The results indicated that ro…

The construction of open GdIII metal–organic frameworks based on methanetriacetic acid: New objects with an old ligand

2010

11 páginas, 11 figuras, 2 esquemas.-- et al.

Novel Lipophilic Lanthanide Bis-Phthalocyanines Functionalized by Pentadecylphenoxy Groups: Synthesis, Characterization and UV-Photostability

2012

Novel sandwich-type phthalocyanines containing a rare earth metal core (Pr, Nd, Eu-Lu) and macrocycles peripherally substituted by pentadecylphenoxy groups were synthesized using a cardanol-based phthalonitrile precursor and the respective lanthanide acetate. Additionally, the metal free-base analog compound was studied for comparison. The purified reaction products were all found to be thick and viscous substances at room temperature, showing liquid crystalline behavior with a distinct increase in fluidity at ca. 40 ° C. The complexes are readily soluble in chloroalkyl solvents and dissolve fairly well in DMF with some tendency to form aggregates. Besides they are strongly hydrophobic and …

Mononuclear lanthanide single molecule magnets based on the polyoxometalates [Ln(W5O18)2]9- and [Ln(beta2-SiW11O39)2]13- (Ln(III) = Tb, Dy, Ho, Er, T…

2009

The first two families of polyoxometalate-based single-molecule magnets (SMMs) are reported here. Compounds of the general formula [Ln(W(5)O(18))(2)](9-) (Ln(III) = Tb, Dy, Ho, and Er) and [Ln(SiW(11)O(39))(2)](13-) (Ln(III) = Tb, Dy, Ho, Er, Tm, and Yb) have been magnetically characterized with static and dynamic measurements. Slow relaxation of the magnetization, typically associated with SMM-like behavior, was observed for [Ln(W(5)O(18))(2)](9-) (Ln(III) = Ho and Er) and [Ln(SiW(11)O(39))(2)](13-) (Ln(III) = Dy, Ho, Er, and Yb). Among them, only the [Er(W(5)O(18))(2)](9-) derivative exhibited such a behavior above 2 K with an energy barrier for the reversal of the magnetization of 55 K. …

Search for superheavy elements in monazites using chemical enrichment

1982

Evidence for the existence of superheavy elements in monazite inclusions embedded in Madagascan mica and surrounded by giant radioactive haloes was given by Gentry et al.1 who observed photons with energies corresponding to predicted Lα1 X-ray energies of element 126 (at 27.25 keV) and also of elements 116, 124 and 127 in irradiations of such crystals with collimated proton beams. For an unambiguous identification, the detection of further members of the L X-ray series would be most important. In X-ray spectra of monazite samples these transitions are buried under the strong K X-ray peaks of the lanthanide elements. They should, however, become visible after chemical enrichment of the super…

Lituānismi dažās Lietuvas pierobežas sēliskajās izloksnēs: Aknīste, Gārsene, Laši, Prode

1994

Saturs: Ievads. 1.0. Lingvistiskā situācija Aknīstē, Gārsenē, Lašos un Prodē 1.1. Valodu kontakti kā aizgūšanas priekšnoteikums 1.2. Iedzīvotāji un valodu funkcionēšana Aknīstes, Gārsenes, Lašu un Prodes pagastā 2.0. Lituānismi, to noteikšanas kritēriji, un aizgūšanas motīvi 3.0. Lituānismu fonētiskā, morfoloģiskā un semantiskā analīze 3.1. Aizguvumu fonētiskā adaptācija 3.2. Aizguvumu morfoloģiskā adaptācija 3.3. Aizguvumu semantiskā adaptācija 4.0. Lituānismu tematiskās grupas un hronoloģija Secinājumi Saīsinājumu saraksts Citēto avotu saraksts Citētās un izmantotās literatūras saraksts Pielikums Lituānisrnu vārdnīca Izlokšņu un to apzīmējumu saraksts Kartes

Los «cuadros culturales» en los diccionarios italiano-español actuales

2018

Bilingual dictionaries pay more and more attention to the information about the elements that are intimately linked to the culture of one of the two languages in question. This is why, in the absence of an immediate equivalence in the target language, they constitute a challenge for the lexicographer. Thus, bilingual translation dictionaries find it difficult to offer possible equivalents. The bilingual dictionaries that also want to help the decoding of such lexical units offer more extensive information. They do so either through paraphrases that are in the microstructure of the entries, or through what we have called ‘cultural tables’, encyclopaedic texts that complement certain entries …