Search results for "changes"
showing 10 items of 901 documents
Understanding melt generation beneath the slow-spreading Kolbeinsey Ridge using 238U, 230Th, and 231Pa excesses
2011
International audience; To examine the petrogenesis and sources of basalts from the Kolbeinsey Ridge, one of the shallowest locations along the global ridge system, we present new measurements of Nd, Sr, Hf, and Pb isotopes and U-series disequilibria on 32 axial basalts. Young Kolbeinsey basalts (full-spreading rate = 1.8 cm/yr; 67 degrees 05'-70 degrees 26'N) display ((230)Th/(238)U) 1 with ((230)Th/(238)U) from 0.95 to 1.30 and have low U (11.3-65.6 ppb) and Th (33.0 ppb-2.40 ppm) concentrations. Except for characteristic isotopic enrichment near the Jan Mayen region, the otherwise depleted Kolbeinsey basalts (e. g. (87)Sr/(86)Sr = 0.70272-0.70301, epsilon(Nd) = 8.4-10.5, epsilon(Hf) = 15…
Nomenclatural changes in Apteranthes Mikan (Asclepiadoideae, Apocynaceae)
2006
El género Apteranthes Mikan se considera constituido por unos ocho táxones, en su mayoría distribuidos por el norte de África. Sin embargo, algunos de sus componentes han sido infravalorados en las revisiones más recientes del género, pese a estar bien caracterizados morfológica y biogeográficamente. En la presente contribución, se aportan datos que sirven para justificar la propuesta de dos nuevas combinaciones nomenclaturales: Apteranthes europaea subsp. negevensis (Zohari ex Feinbrun) M.B. Crespo –que incluye las poblaciones orientales de la especie–, y A. munbyana subsp. hispanica (Coincy) M.B. Crespo & Mateo –que se aplica las poblaciones del sudeste ibérico–. Para ambas se adjuntan ic…
Professionals' naming of intellectual disability, past and present practice and rationales
2011
The study illuminates four research questions: What terms for the diagnosis ICD10: F70-79 do Norwegian professionals utilize in their work? Which changes of terminology have professionals experienced? How do professionals explain such changes? Is there a substantive explanation? A semi-structured qualitative interview guide was used on a sample of 41 informants. The main findings are: (1) Different terms are in use; (2) two major changes in naming are observed by the informants: (a) during the 1970s from ‘feeble-minded’ to ‘mental developmental disability’, and (b) after year 2000 from ‘mental developmental disability’ to ‘developmental disability’; (3) professionals are in doubt as to whic…
Record of latest Barremian-Cenomanian environmental change in tectonically controlled depressions from the Jura-Burgundy threshold (Jura Mountains, e…
2019
The area of the western Jura Mountains constitutes the former Jura-Burgundy threshold between the Tethys Ocean and the epicontinental Paris Basin Sea. During the Barremian, the area was covered by a shallow-water Urgonian carbonate platform. Tectonic processes influenced the architecture of the Urgonian platform and were notably responsible for the formation of fault-related depressions on top of the Urgonian series, which were subsequently transformed into incised valleys and then to marine depocenters. Their sedimentary infills are mostly represented by the Perte-du-Rhône Formation and record stepwise environmental change on the innermost platform, which was strongly influenced by the nea…
Study of axillary lymph node asymmetry in a female population
2001
We analysed a large series of axillary lymph nodes, with and without metastases following radical mastectomy for breast cancer. We found left/right asymmetry in numbers of lymph nodes, and also asymmetry of lymph node dimensions, which could have been the caused by tumoral antigenic stimulation. The distribution of hyperplastic node patterns differed significantly.
Back to Pupillometry: How Cortical Network State Fluctuations Tracked by Pupil Dynamics Could Explain Neural Signal Variability in Human Cognitive Ne…
2017
Visual Abstract
Straßennamen als Spiegelbild der Geschichte: Zu den Veränderungen im Bereich der Straßennamen in Oppeln von den Anfängen bis zum Zweiten Weltkrieg
2012
This article examines changes to street names in the city of Oppeln before the transformation to Polish names in 1945. The research is based on a corpus comprising a complete official register of streets and squares in Oppeln/Opole from the beginnings of the town’s history to 2010. The author focuses on the changes in the use of language over the centuries, the form of the hodonyms (on the morphosyntactic level), and the motives for the changes in individual street names.
Theoretical study of the effect of substituent and backbone conformation on the electronic properties of symmetrically substituted poly(di‐n‐alkylsil…
1994
We present the results of ab initio 3‐21G∗ geometry optimizations and valence effective Hamiltonian (VEH) band structure calculations aimed at determining the evolution of the geometric and electronic (ionization potential, electron affinities, and band gaps) properties of all‐trans poly(dimethylsilane), poly(diethylsilane), poly(di‐n‐propylsilane), and poly(di‐n‐butylsilane) when increasing the size of the alkyl group. In the latter polymer, we have also studied the 7/3 conformation, in order to analyze the effect of the backbone conformation on the geometric and electronic structure. The VEH ionization potentials of all‐trans poly(di‐n‐alkylsilanes) are almost equal, and as experimental p…
Effect of over-the-counter whitening strips and toothpaste on shear bond strength of orthodontic brackets
2021
Background To investigate: 1) the effects of over-the-counter white strip enamel bleaching and 2-Step whitening toothpaste application on the shear bond strength of orthodontic brackets at 24-hours and 7-days post-bleaching latent period; and 2) the correlation between amount of bleaching and shear bond strength. Material and Methods Sixty human premolar teeth were randomly assigned into two bleaching groups, white strip group treated with Crest® 3D WHITE™ LUXE Professional Effects Whitestrips (Proctor & Gamble, Greensboro, NC), and whitening toothpaste group, treated with Crest® 3D WHITE™ BRILLIANCE 2-Step Toothpaste (Proctor & Gamble, Greensboro, NC). The groups were further divided into …
A new breath of life for anoxia.
2008
The middle of the Cretaceous (120–80 Ma) was one of the warmest periods of the past 300 m.y., with tropical sea-surface temperatures well over 30 °C ([Puceat et al., 2007][1]; [Forster et al., 2007a][2]) and atmospheric CO2 levels much higher than today. Therefore this period can give us crucial