Search results for "Luto"

Plutonium(III) complexation by humic substances studied by X-ray absorption fine structure spectroscopy

2006

Abstract We determined structural parameters for the near-neighbor surrounding of plutonium(III) in complexes with humic and fulvic acids at pH 1 and for the purpose of comparison also for the plutonium(III) aquo ion by means of X-ray absorption fine structure (XAFS) spectroscopy. It could be shown that in the complexes with humic substances as well as in the plutonium(III) aquo ion sample the trivalent oxidation state of plutonium was stable within the time of the experiment. In the humate and fulvate complexes, the plutonium(III) is surrounded by about eight oxygen atoms with an average Pu–O distance of 2.48 ± 0.02 A. The structural parameters determined for plutonium(III)–humate and –ful…

Sesquiterpene lactones from Anthemis plutonia.

1998

Abstract Aerial parts of Anthemis plutonia furnished three guaianolides, one of them new.

Depth profiling of Pu, 241Am and 137Cs in soils from southern Belarus measured by ICP-MS and alpha- and gamma-spectrometry

2003

The depth distribution of plutonium, americium, and Cs-137 originating front the 1986 accident at the Chernobyl Nuclear Power Plant (NPP) was investigated in several soil profiles in the vicinity from Belarus. The vertical migration of transuranic elements in soils typical of the 30 km relocation area around Chernobyl NPP was studied using inductively coupled plasma mass spectrometry (ICP-MS), alpha spectrometry, and gamma spectrometry. Transuranic concentrations in upper soil layers ranged from 6 x 10(-12) g g(-1) to 6 x 10(-10) g g(-1) for plutonium and from 1.8 x 10(-13) g g(-1) to 1.6 x 10(-11) g g(-1) for americium. These concentrations correspond to specific activities of Pu239+240 of…

Evaluación de la capacidad de un nuevo colutorio de inhibir la formación del cálculo dental supragingival

2014

Introducción: El cálculo dental supone un problema para la salud oral ya que incrementa la acumulación de placa y toxinas bacterianas e impide su adecuada eliminación debido a la rugosidad de su superficie favoreciendo de esta manera a la evolución de la enfermedad periodontal. Objetivos: Este trabajo pretende estudiar la magnitud de cálculo formado tras el empleo de un colutorio antisarro a base de pirofosfatos para analizar así su eficacia y los efectos adversos sobre diversos aspectos de la cavidad oral. Material y método: Se realizó un ensayo clínico aleatorizado, cruzado y a doble ciego. Todos los individuos utilizaron un colutorio B (pirofosfatos) y un colutorio A (placebo) con las mi…

Temperature, fluid content and rheology of localized ductile shear zones in subsolidus cooling plutons

2020

Temperature and fluid content are critical parameters that control rock rheology and strain localization in the continental crust. Here, we determine by thermodynamic modelling the urn:x-wiley:02634929:media:jmg12553:jmg12553-math-0004 of localized ductile shearing during cooling of three different granitoid plutons: the Rieserferner and the Adamello plutons in the Italian Alps, and the Lake Edison pluton in the Sierra Nevada—USA. Shear zones exploited precursor joints, associated veins and alteration zones. urn:x-wiley:02634929:media:jmg12553:jmg12553-math-0005 and P−T phase diagram sections were computed with Perple_X in the system MnO−Na2O−CaO −K2O−FeO−MgO−Al2O3−SiO2−H2O−Fe2O3. The phase…

Poczucie koherencji a style radzenia sobie ze stresem rodziców dzieci z chorobą nowotworową

2018

Wstęp: Sytuacja rozpoznania choroby nowotworowej u dziecka jest jedną z najtrudniejszych w życiu rodziców, nie dziwi więc fakt, że wywołuje ona stres o bardzo dużym nasileniu. O radzeniu sobie z nim można mówić w kategorii procesu, stylu i strategii. Styl radzenia sobie jest trwałą, osobowościową dyspozycją jednostki do określonego sposobu zmagania się z sytuacjami trudnymi. Jednym z najważniejszych zasobów istotnych w procesie radzenia sobie jest poczucie koherencji, czyli globalna orientacja życiowa, na którą składają się wysokie poczucie zrozumiałości, zaradności i sensowności. Cel pracy: Celem badań było określenie związku pomiędzy poczuciem koherencji a stylami radzenia sobie ze strese…

Exploring ethics : a philosophical inquiry into the education sector of one Finnish city

2016

Construyendo el espacio geográfico a partir del mundo subjetivo de los alumnos

2014

El presente trabajo se enmarca dentro de la geografía subjetiva. A través de un estudio de caso se observa cómo las experiencias personales de los niños y niñas influyen en la construcción y en la deformación del espacio geográfico. Este documento puede servir de orientación para poner en práctica un proyecto de innovación, pues se ofrece una secuencia de actividades donde se trabaja el conocimiento y la autonomía espacial. This work is part of subjective geography. A case study shows how children's personal experiences influence the construction and deformation of geographic space. This may provide guidance to implement an innovation project. The series of activities which are proposed wor…

Variscan evolution of the Tanneron Massif, SE France, examined through U-Pb monazite ages

2008

The Tanneron massif belongs to the southernmost segment of the Variscan belt in France and is composed of migmatitic orthogneisses and paragneisses cross-cut by a main tonalite–granite complex. Late Carboniferous detrital basins are bounded by north–south-trending ductile to brittle normal faults and delineate three distinct zones. Our new isotope dilution U–Pb monazite dating indicates a pre-Variscan history in the central part of the massif recorded by monazites from an orthogneiss yielding ages from 440 to 410 Ma, whereas monazites from a migmatitic paragneiss record a late Carboniferous high- T event at 317 ± 1 Ma. In the eastern part, a migmatization event is recorded by monazites from…

Pressure-temperature evolution during two granulite-facies metamorphic events (2.62 and 2.02 Ga) in rocks from the Central Zone of the Limpopo Belt, …

2018

Abstract The Central Zone of the Limpopo Belt in southern Africa is a classical example of a polymetamorphic terrane that experienced three metamorphic events at 3.22 Ga (M1), 2.66–2.61 Ga (M2) and 2.02 (M3). However, the geodynamic significance of these events is controversial as their P-T evolution was poorly constrained. We present new petrological and geochronological data for the M2 and M3 events. The Neoarchean M2 event is well-preserved in samples from a newly discovered enclave of supracrustal and magmatic rocks in the 2.612 Ga Bulai pluton that shielded the enclave against a Paleoproterozoic M3 overprint, which is dominant in rocks exposed outside the pluton. P-T pseudosection mode…