729 research outputs found
μXRF Synchrotron analysis on genus Subbotina from the Tethyan Alano section (NE Italy) across the Middle Eocene Climatic Optimum (MECO)
No full text(Table 3) Mg/Ca, Sr/Ca and Calcium isotope ratios of benthonic foraminifers
No full textWe analysed Mg/Ca, Sr/Ca and Ca isotope ratios of benthonic foraminifers from sediment core tops retrieved during several research cruises in the Atlantic Ocean, in order to improve the understanding of isotope fractionation and element partitioning resulting from biomineralisation processes and changes in ambient conditions. Species include foraminifers secreting tests composed of hyaline low magnesium calcite, porcelaneous high magnesium calcite as well as aragonite. Our results demonstrate systematic isotope fractionation and element partitioning patterns specific for these foraminiferal groups. Calcium isotope fractionation is similar in porcelaneous and hyaline calcite tests and both groups demonstrate the previously described anomaly with enrichment of heavy isotopes around 3-4 degrees C (Gussone and Filipsson, 2010). Calcium isotope ratios of the aragonitic species Hoeglundina elegans, on the other hand, are about 0.4 parts per thousand lighter compared to the calcitic species, which is in general agreement with stronger fractionation in inorganic aragonite compared to calcite. However, the low and strongly variable Sr content suggests additional processes during test formation, and we propose that transmembrane ion transport or a precursor phase to aragonite may be involved. Porcelaneous tests, composed of high Mg calcite, incorporate higher amounts of Sr compared to hyaline low Mg calcite, in agreement with inorganic calcite systematics, but also porcelaneous tests with reduced Mg/Ca show high Sr/Ca. While calcium isotopes, Sr/Ca and Mg/Ca in benthonic foraminifers primarily appear to fractionate and partition with a dominant inorganic control, delta Ca-44/40 temperature and growth rate dependencies of benthonic foraminifer tests favour a dominant contribution of light Ca by transmembrane transport relative to unfractionated seawater Ca to the calcifying fluid, thus controlling the formation of foraminiferal delta Ca-44/40 and Sr/Ca proxy signals. (C) 2015 Elsevier Ltd. All rights reserved
Helena Kolody, carbono & diamante: uma biografia ilustrada
No full textTese (doutorado) - Universidade Federal de Santa Catarina, Centro de Comunicação e Expressão. Programa de Pós-Graduação em LiteraturaHelena Kolody, carbono & diamante - uma biografia ilustrada conta a vida da escritora Helena Kolody, a partir de sua inscrição na literatura, questionando sua identidade, o mundo que a cercava e o sentido de sua existência. Equivale a dizer: em sua lírica, reflexões e sentimentos se entretecem a partir de uma matéria pessoal e localizada. Da estação ferroviária à estação tubo; da Ucrânia ao centro de Curitiba; de Paisagem interior a Reika; do século XIX ao século XXI, a literatura de Helena Kolody gerencia sua presença na consolidação do binômio arte-vida. O retrato da autora acaba se constituindo também por meio de farto aparato iconográfico; pelos mais de quinhentos textos críticos elencados e por sua obra completa. Fragmentação deliberadamente assumida, a pessoa se revela em sua inteireza.Helena Kolody, carbon & diamond - an illustrated biography tells the life of Helena Kolody, from her very insertion in literature, as it questions her identity, the world surrounding her, and the meaning of her existence. That is equivalent to saying that in her poetry there is the intermingling of reflections and feelings that derive from personal and localized material. From the railroad station to the tube-shaped bus stops; from Ukraine to downtown Curitiba; from Paisagem interior to Reika; from the nineteenth century to the twenty-first century, Helena Kolody's literature guarantees her presence in the consolidation of the art/life binomial. The portrait of the author ends up by also being made up of an abundant iconographic apparatus, of the over five hundred critical texts listed, and of her complete work. The person, although deliberately accepting her own fragmentation, reveals herself in her entireness
Transient observations : the textualizing of St Helena through five hundred years of colonial discourse
No full textThis thesis explores the textualizing of the South Atlantic island of St Helena (a
British Overseas Territory) through an analysis of the relationship between
colonizing practices and the changing representations of the island and its
inhabitants in a range of colonial 'texts', including historiography, travel writing,
government papers, creative writing, and the fine arts.
Part I situates this thesis within a critical engagement with post-colonial
theory and colonial discourse analysis primarily, as well as with the recent
'linguistic turn' in anthropology and history. In place of post-colonialism's rather
monolithic approach to colonial experiences, I argue for a localised approach to
colonisation, which takes greater account of colonial praxis and of the continuous
re-negotiation and re-constitution of particular colonial situations.
Part II focuses on a number of literary issues by reviewing St Helena's
historiography and literature, and by investigating the range of narrative tropes
employed (largely by travellers) in the textualizing of St Helena, in particular
with respect to recurrent imaginings of the island in terms of an earthly Eden.
Part III examines the nature of colonial 'possession' by tracing the island's
gradual appropriation by the Portuguese, Dutch and English in the sixteenth and
early seventeenth century and the settlement policies pursued by the English
East India Company in the late seventeenth and early eighteenth century.
Part IV provides an account of the changing perceptions, by visitors and
colonial officials alike, of the character of the island's inhabitants (from the late
eighteenth to the early twentieth century) and assesses the influence that these
perceptions have had on the administration of the island and the political status of
its inhabitants (in the mid- to late twentieth century).
Part V, the conclusion, reviews the principal arguments of my thesis by
addressing the political implications of post-colonial theory and of my own
research, while also indicating avenues for further research.
A localised and detailed exploration of colonial discourse over a period of
nearly five hundred years, and a close analysis of a consequently wide range of
colonial 'texts', has confirmed that although colonising practices and
representations are far from monolithic, in the case of St Helena their continuities
are of as much significance as their discontinuities
Aspects of diagnosis and treatment of hypopituitarism in adult life
No full textManagement of adult patients with hypopituitarism can improve with better char¬ac¬terisation of idiopathic pituitary insufficiency (IPI) and clearer diagnosis of central hy¬pothy¬roidism (CH). Moreover, optimised treatment strategies for glucocorticoid (GC) re¬placement therapy and of long-term growth hormone (GH) in GH deficiency (GHD) are needed.
This thesis contains four studies addressing these issues. By evaluating patients with IPI, mutations generating hypopituitarism were identified in an unselected adult IPI population. A new allel constellation in a compound PROP1 mutation was re¬vealed in two siblings, with a phenotype of very late onset ACTH-insufficiency. Those cases were only detected in patients with documented childhood onset disease. A pilot study investigated the response of the thyroid gland after stimulation with 0.9 mg re¬combinant human thyreotropin (rhTSH) in patients with newly diagnosed CH and healthy controls. The untreated CH patients had lower free thyroxine response than controls. A database study containing 2424 hypopituitary patients, di¬vided into ACTH-insufficient and ACTH-sufficient (AS) patients, demonstrated a clear GC dose-re¬sponse relation with metabolic outcome. Patients with hydrocortisone equivalent doses of <20 mg/day had a similar metabolic profile as AS patients. In a large study on GHD patients on long-term GH treatment quality of life (QoL), body composition, and metabolic outcome were evaluated during 4-month-GH-dis¬continuation in a dou¬ble blind, placebo controlled design. QoL deteriorated, body com¬position moved towards a GHD state and metabolic parameters were impaired during placebo treatment.
These studies infer that genetic hypopituitarism should be searched for in IPI cases, especially in childhood onset disease and where there is a family history. The diag¬nosis of CH can be improved by an rhTSH test. In many cases, doses of GC can be reduced in ACTH-insufficient patients in order to improve their metabolic outcome and continuous long-term GH replacement is needed to maintain beneficial effects on QoL, body composition, and metabolism
(Appendix B) Oxygen and carbon isotopic data of living (stained) Stainforthia fusiformis from Gullmar Fjord
No full textThe uppermost 10 mm of the cores were used
Benthic foraminifers of sediment core Skagerrak01_GA113-2Aa
No full textBenthic foraminifers of sediment core Skagerrak01_GA113-2A
Grain size distribution of Gåsfjärden fjord (southeast of Swedish Baltic Sea coast)
No full textGrain size distribution of Gåsfjärden fjord (southeast of Swedish Baltic Sea coast
δ¹³C of Cassidulina laevigata in sediment core Svanic90_9004 from the Gullmar Fjord on the west coast of Sweden
No full textδ¹³C of Cassidulina laevigata in sediment core Svanic90_9004 from the Gullmar Fjord on the west coast of Swede
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