997 resultados para brown-out


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O tema desta Dissertação é o suicídio como conseqüência da identificação com a mãe morta. Trata-se de uma pesquisa teórica fundamentada na teoria psicanalítica, que recorre à análise do personagem Richard Brown, do filme As Horas, para ilustrar o argumento teórico de que a revivescência da identificação com a mãe morta pode ser um fator desencadeante do suicídio do melancólico na vida adulta. Inicialmente procura explicitar o conceito de mãe morta, caracterizada como uma mãe que mesmo quando está presente mostra-se ausente nos cuidados e no investimento amoroso ao filho em função de sua depressão. Assim, para a criança, a imagem materna será a de uma mãe sem vida, de uma mãe morta. Mostra a identificação com a mãe morta como saída psíquica para a situação traumática proveniente do desinvestimento amoroso maternal. A criança na relação com esta mãe vive uma catástrofe psíquica chamada por Green de trauma narcisista, o que vai determinar o destino do investimento libidinal, objetal e narcisista do sujeito. Assim sendo, considera-se a melancolia como uma psicopatologia manifestada na vida adulta pelo sujeito subjugado pelo complexo da mãe morta. O estudo da melancolia no texto Luto e Melancolia, de Freud, fornece subsídios para se compreender os processos do mundo interior daqueles que querem dar cabo à sua própria existência. A melancolia evidencia o embate entre o Eu e o Supereu nos papéis de acusado e acusador. Mostra que o Supereu se torna sádico ao cobrar perfeição do Eu masoquista empobrecido narcisicamente pela identificação com a mãe morta. Quando chega às raias do sadismo esse embate leva o Eu, identificado com a mãe morta, a desejar eliminar o objeto mau introjetado numa parte do Eu, para resgatar o seu valor narcísico idealizado. Aponta o suicídio como a saída psíquica encontrada pelo melancólico para livrar-se da identificação com a mãe morta. Conclui que no suicídio os conflitos inconscientes manifestados na vida adulta são revivescências dos conteúdos psíquicos registrados na infância. No caso estudado em questão, a revivescência da identificação com a mãe morta teria sido o fator desencadeante do suicídio de Richard Brown na vida adulta.

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Fundação de Amparo à Pesquisa do Estado de São Paulo (FAPESP)

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With the objective to establish the best metabolizable energy (ME) intake for layers, and the best dietary vegetable oil addition level to optimize egg production, an experiment was carried out with 432 30-week-old Hisex Brown layers. Birds were distributed into nine treatments with six replicates of eight birds each according to a 3 x 3 factorial arrangement, consisting of three daily metabolizable energy intake (280, 300 or 320 kcal/bird/day) and three oil levels (0.00; 0.75 and 1.50 g/bird/day). Daily feed intake was limited to 115, 110 and 105 g/bird in order to obtain the desired energy and oil intake in each treatment. The following parameters were evaluated: initial weight, final weight, body weight change, egg production, egg mass, feed conversion ratio per dozen eggs and per egg mass and energy conversion. There was no influence of the treatments on egg production (%) or egg mass (g/bird/day). Final weight and body weight change were significantly affected by increasing energy intake. Feed conversion ratio per egg mass, feed conversion ratio per dozen eggs and energy conversion significantly worsened as a function of the increase in daily energy intake. An energy intake of 280 kcal/bird/day with no addition of dietary oil does not affect layer performance.

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On the basis of the experiments carried out over various years, it was concluded that (1) grayling Thymallus thymallus and brown trout Salmo trutta are resistant to temperature-induced sex reversal at ecologically relevant temperatures, (2) environmental sex reversal is unlikely to cause the persistent sex ratio distortion observed in at least one of the study populations and (3) sex-specific tolerance of temperature-related stress may be the cause of distorted sex ratios in populations of T. thymallus or S. trutta.

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The incidence of uterine torsion in cattle is 0.5–1 per cent of all calvings and up to 30 per cent of all dystocia cases (Berchtold and Rüsch 1993). The unstable suspension of the bovine uterus is a predisposition cited by different authors (Pearson 1971, Schulz and others 1975, Berchtold and Rüsch 1993). Age of the cow, season and weight and sex of the calf have been inconsistently reported to be associated with uterine torsion (Distl 1991, Frazer and others 1996, Tamm 1997). Small amount of fetal fluids and a large abdomen may contribute to uterine torsion (Berchtold and Rüsch 1993). Furthermore, some authors describe a predisposition in the Brown Swiss breed (Distl 1991, Schmid 1993, Frazer and others 1996) and in cows kept in alpine regions (Schmid 1993). Uterine torsion is predominantly seen under parturition, and the degree of torsion is most often between 180° and 360°. The direction is counter-clockwise in 60–90 per cent of the cases (Pearson 1971, Berchtold and Rüsch 1993, Erteld and others 2012). Vaginal delivery is possible after manual detorsion or after rolling of the cow, whereas caesarean section has to be performed after unsuccessful detorsion or if the cervix is not dilating adequately following successful correction of the torsion (Berchtold and Rüsch 1993, Frazer and others 1996). Out of all veterinary-assisted dystocia cases, 20 per cent (Aubry and others 2008) to 30 per cent (Berchtold and Rüsch 1993) are due to uterine torsion. Many publications describe fertility variables after dystocia, but only Schönfelder and coworkers described that 40 per cent of the cows got pregnant after uterine torsion followed by caesarean section (Schönfelder and Sobiraj 2005).

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In search of a meaningful stress indicator for Fucus vesiculosus we found that the often used quantitative determination procedures for the polysaccharide laminarin (beta-1,3-glucan) result in different kind of problems, uncertainties and limitations. This chemical long-term storage form of carbon enables perennial brown algae in seasonally fluctuating ecosystems to uncouple growth from photosynthesis. Because of this high ecological relevance a reliable and precise method for determination and quantification of laminarin is needed. Therefore, a simple, cold water extraction method coupled to a new quantitative liquid chromatography-mass spectrometrical method (LC-MS) was developed. Laminarin was determined in nine out of twelve brown algal species, and its expected typical molar mass distribution of 2000-7000 Da was confirmed. Furthermore, laminarin consisted of a complex mixture of different chemical forms, since fifteen chemical laminarin species with distinct molecular weights were measured in nine species of brown algae. Laminarin concentrations in the algal tissues ranged from 0.03 to 0.86% dry weight (DW). The direct chemical characterization and quantification of laminarin by LC-MS represents a powerful method to verify the biochemical and ecological importance of laminarin for brown algae. Single individuals of Laminaria hyperborea, L. digitata, Saccharina latissima, F. serratus, F. vesiculosus, F. spiralis, Himanthalia elongata, Cystoseira tamariscifolia, Pelvetia canaliculata, Ascophyllum nodosum, Halidrys siliquosa and Dictyota dichotoma were collected in fall (18.11.2013) during spring low tide from the shore of Finavarra, Co. Clare, west coast of Ireland (53° 09' 25'' N, 09° 06' 58'' W). After sampling, the different algae were immediately transported to the lab, lyophilized and sent to the University of Rostock. Laminarin was extracted with cold ultrapure water from the algal samples. Before extraction they were ground to < 1 mm grain size with an analytical mill (Ika MF 10 Basic). The algal material (approx. 1.5 g DW) was extracted in ultrapure water (8 mL) on a shaker (250 rpm) for 5 h. After the addition of surplus ultrapure water (4 mL) and shaking manually, 1 mL of the sample was filter centrifuged (45 µm) at 14,000 rpm (Hettich Mikro 22 R). The slightly viscous supernatant was free of suspended material and converted into a microvial (300 µL) for further analysis. The extracts were analyzed using liquid chromatography-mass spectrometry (LC-MS) analysis (LTQ Velos Pro ion trap spectrometer with Accela HPLC, Thermo Scientific). Laminarin species were separated on a KinetexTM column (2.6 µm C18, 150 x 3 mm). The mobile phase was 90 % ultrapure water and 10 % acetonitrile, run isocratically at a flow rate of 0.2 mL min-1. MS was working in ESI negative ion mode in a mass range of 100 - 4000 amu. Glucose contents were determined after extraction using high-performance liquid chromatography (HPLC). Extracted samples were analyzed in an HPLC (SmartLine, Knauer GmbH) equipped with a SUPELCOGELTM Ca column (30 x 7,8 mm without preColumn) and RI-detector (S2300 PDA S2800). Water was used as eluent at a flow rate of 0.8 mL min-1 at 75 °C. Glucose was quantified by comparison of the retention time and peak area with standard solutions using ChromGate software. Mannitol was extracted from three subsamples of 10-20 mg powdered alga material (L. hyperborea, L. digitata, S. latissima, F. serratus, F. vesiculosus, F. spiralis, H. elongata, P. canaliculata, A. nodosum, H. siliquosa) and quantified, following the HPLC method described by Karsten et al. (1991). For analyzing carbon and nitrogen contents, dried algal material was ground to powder and three subsamples of 2 mg from each alga thalli were loaded and packed into tin cartridges (6×6×12 mm). The packages were combusted at 950 °C and the absolute contents of C and N were automatically quantified in an elemental analyzer (Elementar Vario EL III, Germany) using acetanilide as standard according to Verardo et al. (1990).

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Si hubiese un denominador común entre todas las artes en lo que ha venido llamándose postmodernidad, éste tendría mucho que ver con el final del origen de la obra. Desde la literatura y la música hasta las artes plásticas y la arquitectura, la superación de la modernidad ha estado caracterizada por la sustitución del concepto de creación por el de intervención artística, o lo que es lo mismo, la interpretación de lo que ya existe. A principios del siglo XX los conceptos modernos de creación y origen implicaban tener que desaprender y olvidar todo lo anterior con el ánimo de partir desde cero; incluso en un sentido material Mies sugería la construcción literal de la materia y su movimiento de acuerdo a unas leyes. A partir de la segunda mitad de siglo los planteamientos historicistas empezaron a surgir como reacción ante la amnesia y la supuesta originalidad de los modernos. En este contexto surgen los libros Learning from Las Vegas, 1972 y Delirious New York, 1978, ambos deudores en muchos aspectos con el anterior libro de Venturi, Complexity and Contradiction in Architecture, 1966. Estos dos libros sobre ciudades, alejándose decididamente de las tendencias historicistas de la época, proponían utilizar el análisis crítico de la realidad existente como vehículo para la teoría y el proyecto de manera simultánea, convirtiéndose indirectamente en Manifiestos. Si en un primer momento Venturi, Rossi y otros planteaban acabar con los límites formales establecidos por la modernidad, así como por cualquiera de los cánones anteriores, tomando la totalidad de la obra construida como sistema de referencia, - al igual que hiciera Eliot en literatura, - los libros de Las Vegas y Nueva York sugerían directamente borrar los límites de la propia disciplina, llegando a poner en duda ¿Qué puede ser considerado arquitectura? Sin embargo, debido precisamente a la ausencia total de límites y a la inmensidad del sistema referencial planteado, “todo puede ser arquitectura”, como apuntaba Hans Hollein en 1968, los libros proponen al mismo tiempo definir el campo de actuación de cada cual de manera individual. Los escritos sobre Las Vegas y Nueva York suponen por un lado la eliminación de los limites disciplinares y por otro, la delimitación de ámbitos de trabajo concretos para sus autores: los propios de cada una de las ciudades interpretadas. La primera parte de la Tesis, Lecciones, se ocupa del necesario proceso de aprendizaje y experimentación previo a la acción crítica propiamente dicha. Los arquitectos contemporáneos necesitan acumular material, conocimiento, documentación, experiencias... antes de lanzarse a proponer mediante la crítica y la edición; y al contrario que ocurría con los modernos, cuanto más abundante sea ese bagaje previo más rica será la interpretación. Las ciudades de Roma, Londres y Berlín se entienden por tanto como experiencias capaces de proporcionar a Venturi, Scott Brown y Koolhaas respectivamente, sus “personales diccionarios”, unas interminables imaginerías con las que posteriormente se enfrentarían a los análisis de Las Vegas y Nueva York. La segunda parte, Críticas, se centra en la producción teórica en sí: los dos libros de ciudades analizados en estrecha relación con el Complexity and Contradiction. El razonamiento analógico característico de estos libros ha servido de guía metodológica para la investigación, estableciéndose relaciones, no entre los propios escritos directamente, sino a través de trabajos pertenecientes a otras disciplinas. En primer lugar se plantea un importante paralelismo entre los métodos de análisis desarrollados en estos libros y los utilizados por la crítica literaria, observando que si el new criticism y el nuevo periodismo sirvieron de guía en los escritos de Venturi y Scott Brown, la nouvelle critique y su propuesta de identificación poética fueron el claro referente de Koolhaas al abordar Nueva York. Por otro lado, la relevancia ganada por la actividad de comisariado artístico y la aparición de la figura del curator, como autoridad capaz de utilizar la obra de arte por encima de las intenciones de su propio autor, sirve, al igual que la figura del editor, como reflejo de la acción transformadora y de apropiación llevada a cabo tanto en Learning from Las Vegas, como en Delirious New York. Por último y a lo largo de toda la investigación las figuras de Bergson y Baudelaire han servido como apoyo teórico. A través de la utilización que de sus ideas hicieron Venturi y Koolhaas respectivamente, se ha tratado de mostrar la proximidad de ambos planteamientos desde un punto de vista ideológico. La Inclusión propuesta por Venturi y la ironía utilizada por Koolhaas, la contradicción y la paradoja, no son sino el reflejo de lógicas que en ambos casos reaccionan al mismo tiempo contra idealismo y materialismo, contra modernidad y antimodernidad, en un continuo intento de ser lo uno y lo otro simultáneamente. ABSTRACT If there was a common denominator among all the arts in what has been called postmodernism, it would have much to do with the end of the origin of the artwork. From literature and music to fine arts and architecture, overcoming modernity has been characterized by replacing the concept of artistic creation by the one of intervention, in other words, the interpretation of what already exists. In the early twentieth century modern concepts of creation and origin involved unlearning and forgetting everything before with the firm intention of starting from scratch. Even in a material sense Mies suggested the literal construction of matter and its motion according to laws. From the mid-century historicist approaches began to emerge in response to the amnesia and originality alleged by moderns. In this context appeared the books Learning from Las Vegas, 1972 and Delirious New York, 1978, both debtors in many respects to the previous book by Venturi, Complexity and Contradiction in Architecture, 1966. These two books on cities, which broke away decidedly with the historicist trends of the time, proposed using critical analysis of the existing reality as a vehicle for theory and projecting at the same time, indirectly becoming manifests. If at first Venturi, Rossi and others pose to erase the formal limits set by modernity, as well as any of the canons before, taking the entire work built as a reference system, - as did Eliot in literature - the books on Las Vegas and New York proposed directly erasing the boundaries of the discipline itself, coming to question what could be considered architecture? However, and precisely because of the absence of limits and the immensity of the established framework, - “everything could be architecture” as Hans Hollein pointed in 1968, - the books suggested at the same time the definition of a field of action for each one individually. The cities of Las Vegas and New York represented on the one hand the elimination of disciplinary limits and on the other, the delimitation of specific areas of work to its authors: Those on each of the cities interpreted. The first part of the thesis, Lessons, attend to the necessary process of learning and experimentation before the critical action itself. Contemporary architects need to accumulate material, knowledge, information, experiences... before proposing through criticism and editing; and unlike happened with moderns, the most abundant this prior baggage is, the richest will be the interpretation. Rome, London and Berlin are therefore understood as experiences capable of providing Venturi, Scott Brown and Koolhaas respectively, their “personal dictionaries”, interminable imageries with which they would later face the analysis of Las Vegas and New York. The second part, Critiques, focuses on the theoretical production itself: the two books on both cities analyzed closely with the Complexity and Contradiction. The analogical reasoning characteristic of these books has served as a methodological guide for the research, establishing relationships, not directly between the writings themselves, but through works belonging to other disciplines. First, an important parallel is set between the methods of analysis developed in these books and those used by literary criticism, noting that if the new criticism and new journalism guided Venturi and Scott Brown´s writings, the nouvelle critique and its poetic identification were clear references for Koolhaas when addressing New York. On the other hand, the relevance gained by curating and the understanding of the figure of the curator as an authority capable to use artworks above the intentions of their authors, like the one of the Editor, reflects the appropriation and processing actions carried out both in Learning from Las Vegas, and Delirious New York. Finally and over all the research Bergson and Baudelaire figures resonate continuously. Through the use of their ideas done by Venturi and Koolhaas respectively, the research has tried to show the proximity of both approaches from an ideological point of view. Inclusion, as posed by Venturi and irony, as used by Koolhaas, contradiction and paradox are reflections of the logic that in both cases allow them to react simultaneously against idealism and materialism, against modernism and anti-modernism.

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Fungi that cause brown rot of wood are essential biomass recyclers and also the principal agents of decay in wooden structures, but the extracellular mechanisms by which they degrade lignocellulose remain unknown. To test the hypothesis that brown-rot fungi use extracellular free radical oxidants as biodegradative tools, Gloeophyllum trabeum was examined for its ability to depolymerize an environmentally recalcitrant polyether, poly(ethylene oxide) (PEO), that cannot penetrate cell membranes. Analyses of degraded PEOs by gel permeation chromatography showed that the fungus cleaved PEO rapidly by an endo route. 13C NMR analyses of unlabeled and perdeuterated PEOs recovered from G. trabeum cultures showed that a major route for depolymerization was oxidative C—C bond cleavage, a reaction diagnostic for hydrogen abstraction from a PEO methylene group by a radical oxidant. Fenton reagent (Fe(II)/H2O2) oxidized PEO by the same route in vitro and therefore might account for PEO biodegradation if it is produced by the fungus, but the data do not rule out involvement of less reactive radicals. The reactivity and extrahyphal location of this PEO-degrading system suggest that its natural function is to participate in the brown rot of wood and that it may enable brown-rot fungi to degrade recalcitrant organopollutants.

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A method was developed to extract adenine nucleotides AMP, ADP, and ATP from marine macroalgal tissue to gain information on the cellular energy charge. Quantification was carried out by high performance liquid chromatography (HPLC). Three species from the rocky shore of the island of Helgoland (German Bight) were examined: Laminaria saccharina (Phaeophyta), Chondrus crispus (Rhodophyta), and Ulva lactuca (Chlorophyta). In L. saccharina and C. crispus, the adenylate energy charge (AEC) was determined in different thallus regions. AEC varied in relation to tissue age and function. Higher AEC values typically occurred in thallus regions with meristematic activity. Furthermore, L. saccharina and U. lactuca were exposed to UV-A and elevated UV-B radiation. The AEC was calculated and the maximal quantum yield of photosystem II (Fv/Fm) was determined as indicators for UV stress. In both species, the AEC remained at high values (0.72 ± 0.04), while Fv/Fm dropped rapidly. The results show that the photosynthesis of the phaeophyte is more resistant to UV radiation than the chlorophyte.

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Mode of access: Internet.

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Blank pages for "Family record": [8] p. between Apocrypha and New Testament.