960 resultados para Margem Continental Ibérica


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"A terceira margem do rio", conto de Joao Guimaraes Rosa, é objeto de análise deste trabalho, que se utiliza do referencial teórico da semiótica francesa que, desde os anos 1980, constrói uma semântica da dimensao passional dos discursos e passa a considerar a paixao "como efeito de sentido inscrito e codificado na linguagem". Nosso texto focaliza os estados de alma do sujeito da história, que, projetado no presente da enunciaçao, ao rememorar o passado, já entrado em anos, toma consciência da anulaçao de sua existência, que foi marcada pela ausência do pai. Focalizamos o percurso patêmico do "eu" narrador, como sujeito do enunciado, em cenas enunciativas do texto nas quais se manifestam variantes da paixao da cólera , tendo em vista o modo como Jacques Fontanille (2005) a descreve em Dictionnaire de passsions Littéraires. Nossa hipótese é que o eu nao teve consciencia da raiva e da revolta que sentiu em relaçao ao distanciamento do pai e, nesse sentido, observamos como essa revolta, ao final, provoca-lhe o sentimento de culpa e de medo. Logo, o estado afetivo de medo o impede de seguir o percurso do pai ao final da história

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This report contains the occurrence data for dinoflagellate cysts recorded from 163 samples taken from Sites 902 through 906, during Ocean Drilling Program (ODP) Leg 150. The dinoflagellate cyst (dinocyst) stratigraphy has been presented in Mountain, Miller, Blum, et al. (1994, doi:10.2973/odp.proc.ir.150.1994), and was based on these data. This report provides the full dinocyst data set supporting the dinocyst stratigraphic interpretations made in Mountain, Miller, Blum, et al. (1994). For Miocene shipboard dinocyst stratigraphy, I delineated 10 informal zones: pre-A, and A through I, in ascending stratigraphic order. These zones are defined in Shipboard Scientific Party (1994a, doi:10.2973/odp.proc.ir.150.103.1994), and are based on my studies of Miocene dinocyst stratigraphy in the Maryland and Virginia coastal plain (de Verteuil and Norris, 1991, 1992; de Verteuil, 1995). This zonation has been slightly revised (de Verteuil and Norris, 1996), and the new formal zone definitions are repeated below. Each new zone has an alpha-numeric abbreviation starting with "DN" (for Dinoflagellate Neogene). The equivalence between the informal zones reported in Mountain, Miller, Blum, et al. (1994), and the new DN zones is illustrated in Figure 1. For clarity, I delineated both zonations in the range charts that accompany this report (Tables 1-6). De Verteuil and Norris (1996a), using these and other data, correlated the DN zonation with the geological time scale of Berggren et al. (1995). Figure 2 summarizes these correlations and can be used to check the chronostratigraphic position of samples in this report, as determined by dinocyst stratigraphy. A thorough discussion of the basis for, and levels of uncertainty associated with, these correlations to the Cenozoic time scale can be found in de Verteuil and Norris (1996a). The Appendix lists all the dinocyst taxa recorded during shipboard analyses of Leg 150 samples. Open nomenclature is used for undescribed taxa. The range charts and Appendix also include reference to several new taxa that de Verteuil and Norris (1996b) described from Miocene coastal plain strata in Maryland and Virginia. Names of these taxa in Tables 1 through 6 and in the Appendix of this report are not intended for effective publication as defined in the International Code of Botanical Nomenclature (ICBN, Greuter et al., 1994). Therefore, taxonomic nomenclature contained in this report is not to be treated as meeting the conditions of effective and valid publication (ICBN; Article 29).

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El término latino que da el castellano "llanto", llegó a designar una especie lírica muy cultivada, el planto (en castellano) o el planh-plany (en occitano-catalán), es decir, el lamento fúnebre por la muerte de una persona querida o un personaje célebre. El gran modelo o paradigma de todo planctus, para la sensibilidad medieval, era el de la Virgen María a los pies de la cruz de Jesús. Se analizan en este trabajo algunos elementos de la tradición del planctus mariano en la Península Ibérica, la cual incluye no sólo célebres poemas de largo aliento como el Duelo de la Virgen de Gonzalo de Berceo, sino también manifestaciones líricas más breves, desde las piezas litúrgicas en latín hasta los poemas de los dolores de la Virgen presentes en las Cantigas de Santa María de Alfonso X.

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"A terceira margem do rio", conto de Joao Guimaraes Rosa, é objeto de análise deste trabalho, que se utiliza do referencial teórico da semiótica francesa que, desde os anos 1980, constrói uma semântica da dimensao passional dos discursos e passa a considerar a paixao "como efeito de sentido inscrito e codificado na linguagem". Nosso texto focaliza os estados de alma do sujeito da história, que, projetado no presente da enunciaçao, ao rememorar o passado, já entrado em anos, toma consciência da anulaçao de sua existência, que foi marcada pela ausência do pai. Focalizamos o percurso patêmico do "eu" narrador, como sujeito do enunciado, em cenas enunciativas do texto nas quais se manifestam variantes da paixao da cólera , tendo em vista o modo como Jacques Fontanille (2005) a descreve em Dictionnaire de passsions Littéraires. Nossa hipótese é que o eu nao teve consciencia da raiva e da revolta que sentiu em relaçao ao distanciamento do pai e, nesse sentido, observamos como essa revolta, ao final, provoca-lhe o sentimento de culpa e de medo. Logo, o estado afetivo de medo o impede de seguir o percurso do pai ao final da história

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Pore water and solid phase from surface sediments of the continental slope off Uruguay and from the Argentine Basin (southwestern Atlantic) were investigated geochemically to ascribe characteristic early diagenetic reactions of iron and manganese. Solid-phase iron speciation was determined by extractions as well as by Mössbauer spectroscopy. Both methods showed good agreement (<6% deviation) for total-Fe speciation. The proportion of easy reducible iron oxyhydroxide relative to total-Fe oxides decreased from the continental slope to the deep sea which is attributed to an increase in crystallinity during transport as well as to a general decrease of iron mobilization. The product of iron reoxidation is Fe oxyhydroxide which made up less than 5% of total Fe. In addition to this fraction, a proportion of smectite bound iron was found to be redox reactive. This fraction made up to 10% of total Fe in sediments of the Argentine Basin and was quantitatively extracted by 1 N HCl. The redox reactive Fe(+II) fraction of smectite was almost completely reoxidized within 24 h under air atmosphere and may therefore considerably contribute to iron redox cycling if bioturbation occurs. In the case of the slope sediments we found concurrent iron and manganese release to pore water. It is not clear whether this is caused by dissimilatory iron and manganese reduction at the same depth or dissimilatory iron reduction alone inducing Mn(+IV) reduction by (abiotic) reaction with released Fe2+. The Argentine Basin sediment showed a significant manganese solid-phase enrichment above the denitrification depth despite the absence of a distinct pore-water gradient of Mn. This implies a recent termination of manganese mobilization and thus a non-steady-state situation with respect to sedimentation or to organic carbon burial rate.

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A stable oxygen and carbon isotope stratigraphy is established for a Late Weichselian/Holocene glaciomarine/marine seguence in Andfjorden and Malangsdjupet on the continental shelf off Troms, Northern Norway. The stratigraphy demonstrates that the global signals, Termination I B and possibly also I A (upper parts), are present and radiocarbon date to 10.3-9.7 kyr B.P. and >14-13.5 kyr B.P., respectively. A temperature increase of 5°-6°C and possibly a small salinity increase occurred during Term. I. A near-glacial environment between 13 and 14 kyr B.P. was characterized by poorly ventilated bottom waters followed by a meltwater pulse at circa 13 kyr B.P. During the beginning intrusion of Atlantic Water between 13 and 10 kyr B.P., the bottom water was characterized by somewhat fluctuating temperatures and salinities. Temperatures close to those of the present were established around 9.7 kyr B.P. and seem to have been rather stable since.

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El término latino que da el castellano "llanto", llegó a designar una especie lírica muy cultivada, el planto (en castellano) o el planh-plany (en occitano-catalán), es decir, el lamento fúnebre por la muerte de una persona querida o un personaje célebre. El gran modelo o paradigma de todo planctus, para la sensibilidad medieval, era el de la Virgen María a los pies de la cruz de Jesús. Se analizan en este trabajo algunos elementos de la tradición del planctus mariano en la Península Ibérica, la cual incluye no sólo célebres poemas de largo aliento como el Duelo de la Virgen de Gonzalo de Berceo, sino también manifestaciones líricas más breves, desde las piezas litúrgicas en latín hasta los poemas de los dolores de la Virgen presentes en las Cantigas de Santa María de Alfonso X.

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"A terceira margem do rio", conto de Joao Guimaraes Rosa, é objeto de análise deste trabalho, que se utiliza do referencial teórico da semiótica francesa que, desde os anos 1980, constrói uma semântica da dimensao passional dos discursos e passa a considerar a paixao "como efeito de sentido inscrito e codificado na linguagem". Nosso texto focaliza os estados de alma do sujeito da história, que, projetado no presente da enunciaçao, ao rememorar o passado, já entrado em anos, toma consciência da anulaçao de sua existência, que foi marcada pela ausência do pai. Focalizamos o percurso patêmico do "eu" narrador, como sujeito do enunciado, em cenas enunciativas do texto nas quais se manifestam variantes da paixao da cólera , tendo em vista o modo como Jacques Fontanille (2005) a descreve em Dictionnaire de passsions Littéraires. Nossa hipótese é que o eu nao teve consciencia da raiva e da revolta que sentiu em relaçao ao distanciamento do pai e, nesse sentido, observamos como essa revolta, ao final, provoca-lhe o sentimento de culpa e de medo. Logo, o estado afetivo de medo o impede de seguir o percurso do pai ao final da história

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During the Netherlands Indian Ocean Project (NIOP, 1992-1993) sediment community oxygen consumption (SCOC) was measured on two continental margins in the Indian Ocean with different productivity: the productive upwelling region off Yemen-Somalia and the supposedly less productive Kenyan margin, which lacks upwelling. The two margins also differ in terms of river input (Kenya) and the more severe oxygen minimum in the Arabian Sea. Simultaneously with SCOC, distributions of benthic biomass and phytodetritus were studied. Our expectation was that benthic processes in the upwelling margin of the Arabian Sea would be relatively enhanced as a result of the higher productivity. On the Kenyan margin, SCOC (range 1-36 mmol/m**2/d) showed a clear decrease with increasing water depth, and little temporal variation was detected between June and December. Highest SCOC values of this study were recorded at 50 m depth off Kenya, with a maximum of 36 mmol/m**2/d in the northernmost part. On the margin off Yemen-Somalia, SCOC was on average lower and showed little downslope variation, 1.8-5.7 mmol/m**2/d, notably during upwelling, when the zone between 70 and 1700 m was covered with low O2 water (10-50 µM). After cessation of upwelling, SCOC at 60 m depth off Yemen increased from 5.7 to 17.6 mmol/m**2/d concurrently with an increase of the near-bottom O2 concentration (from 11 to 153 µM), suggesting a close coupling between SCOC and O2 concentration. This was demonstrated in shipboard cores in which the O2 concentration in the overlying water was raised after the cores were first incubated under in situ conditions (17 µM O2). This induced an immediate and pronounced increase of SCOC. Conversely, at deeper stations permanently within the oxygen minimum zone (OMZ), SCOC showed little variation between monsoon periods. Hence, organic carbon degradation in sediments on a large part of the Yemen slope appears hampered by the oxygen deficiency of the overlying water. Macrofauna biomass and the pooled biomass of smaller organisms, estimated by the nucleic acid content of the sediment, had comparable ranges in the two areas in spite of more severe suboxic conditions in the Arabian Sea. At the Kenyan shelf, benthic fauna (macro- and meiofauna) largely followed the spatial pattern of SCOC, i.e. high values on the northern shelf-upper slope and a downslope decrease. On the Yemen-Somali margin the macrofauna distribution was more erratic. Nucleic acids displayed no clear downslope trend on either margin owing to depressed values in the OMZ, perhaps because of adverse effects of low O2 on small organisms (meiofauna and microbes). Phytodetritus distributions were different on the two margins. Whereas pigment levels decreased downslope along the Kenya margin, the upper slope off Yemen (800 m) had a distinct accumulation of mainly refractory carotenoid pigments, suggesting preservation under low 02. Because the accumulations of Corg and pigments on the Yemen slope overlap only partly, we infer a selective deposition and preservation of labile particles on the upper slope, whereas refractory material undergoes further transport downslope.