982 resultados para Livros antigos - séc.17 – Bibliografia


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Coordenação de Aperfeiçoamento de Pessoal de Nível Superior (CAPES)

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Pós-graduação em Linguística e Língua Portuguesa - FCLAR

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Inhibition of aromatase, a key enzyme in the biosynthesis of oestradiol-17 beta, by the addition of 1,4,6-androstatrien-3,17-dione resulted in a significant increase in the levels of immunoreactive human chorionic gonadotrophin (hCG) in the medium and tissue. This increase was partially reversed by the simultaneous addition of oestradiol-17 beta. These effects on the levels of immunoreactive hCG were also reflected by the increased levels of mRNA specific for the alpha and beta subunits of hCG following the addition of the aromatase inhibitor. However, addition of tamoxifen resulted in a drastic decrease in the levels of both the messages. Based on these results, it is suggested that the synthesis of hCG is negatively modulated by oestradiol-17 beta in the human placenta.

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I. INTRODUCCION..............1; 1.1. Objetivos................ 3; 1.2. Deberes y Derechos........4; 1.3. Logros obtenidos...........5; II. CARACTERIZACION DEL CENTRO DE PRODUCCION...........6; III. GINECOLOGIA Y OBSTETRICIA......................16; IV. SANIDAD ANIMAL.......34; 4.1. Anatomía patológica (necropsia>.... 34; 4.2. Parasitología.....38; 4.3. Epizootiología....42; V. SITUACION TOXICOLOGICA DE LA ZONA.....46; VI. EVALUACION DE LAS PERDIDAS ECONOMICAS.....49; VII. CONCLUSIONES........54; VIII. RECOMENDACIONES.......55; IX. BIBLIOGRAFIA.........56; X. ANEXOS .............57

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Coral reefs exist in warm, clear, and relatively shallow marine waters worldwide. These complex assemblages of marine organisms are unique, in that they support highly diverse, luxuriant, and essentially self-sustaining ecosystems in otherwise nutrient-poor and unproductive waters. Coral reefs are highly valued for their great beauty and for their contribution to marine productivity. Coral reefs are favorite destinations for recreational diving and snorkeling, as well as commercial and recreational fishing activities. The Florida Keys reef tract draws an estimated 2 million tourists each year, contributing nearly $800 million to the economy. However, these reef systems represent a very delicate ecological balance, and can be easily damaged and degraded by direct or indirect human contact. Indirect impacts from human activity occurs in a number of different forms, including runoff of sediments, nutrients, and other pollutants associated with forest harvesting, agricultural practices, urbanization, coastal construction, and industrial activities. Direct impacts occur through overfishing and other destructive fishing practices, mining of corals, and overuse of many reef areas, including damage from souvenir collection, boat anchoring, and diver contact. In order to protect and manage coral reefs within U.S. territorial waters, the National Oceanic and Atmospheric Administration (NOAA) of the U.S. Department of Commerce has been directed to establish and maintain a system of national marine sanctuaries and reserves, and to monitor the condition of corals and other marine organisms within these areas. To help carry out this mandate the NOAA Coastal Services Center convened a workshop in September, 1996, to identify current and emerging sensor technologies, including satellite, airborne, and underwater systems with potential application for detecting and monitoring corals. For reef systems occurring within depths of 10 meters or less (Figure 1), mapping location and monitoring the condition of corals can be accomplished through use of aerial photography combined with diver surveys. However, corals can exist in depths greater than 90 meters (Figure 2), well below the limits of traditional optical imaging systems such as aerial or surface photography or videography. Although specialized scuba systems can allow diving to these depths, the thousands of square kilometers included within these management areas make diver surveys for deeper coral monitoring impractical. For these reasons, NOAA is investigating satellite and airborne sensor systems, as well as technologies which can facilitate the location, mapping, and monitoring of corals in deeper waters. The following systems were discussed as having potential application for detecting, mapping, and assessing the condition of corals. However, no single system is capable of accomplishing all three of these objectives under all depths and conditions within which corals exist. Systems were evaluated for their capabilities, including advantages and disadvantages, relative to their ability to detect and discriminate corals under a variety of conditions. (PDF contains 55 pages)

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Sobre esta obra Inocêncio informa que a compilação ocorrida por ordem do Rei D. João I e seu filho D. Duarte esteve a cargo, inicialmente, de João Mendes e, posteriormente, de Rui Fernandes. Entretanto, sua conclusão só ocorreu no reinado de D. Afonso V, a 17 de julho de 1446, acrescida de revisões e aperfeiçoada por uma junta composta pelo mesmo Rui Fernandes, por Lopo Vasques, corregedor de Lisboa, e por Luíz Martins e Fernão Rodrigues, desembargadores do rei. Finalmente concluída , a compilação recebeu a denominação de Código ou Ordenaçoens do Senhor Rey D. Affonso V, que, após ficar por alguns séculos quase desconhecida, foi publicada pela primeira vez em Coimbra, em 1792, por mandado e diligência de D. Francisco Rafael de Castro, então reitor e reformador da universidade. A direção e a responsabilidade pela impressão foram confiadas a Joaquim Correa da Silva, autor do prefácio que aparece no início do Tomo I. A obra reveste-se de grande importância devido à grande utilidade que apresenta para os estudos da jurisprudência, da história de Portugal, da filologia e para o conhecimento do idioma português.

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In this paper, we demonstrated a dual-wavelength competitive output in Nd:Y3SC1.5Al3.5O12 ceramic disk laser. Different dual-wavelength output behaviors for Nd:YSAG and Nd:YAG ceramic disk laser were investigated and discussed. By applying the energy transfer model, we suggested the reasonable explanation for this new phenomenon as the disordered replacing of Al3+ ions by Sc3+ ions. The main advantage of the dual-wavelength ceramic laser is the possibility to serve as the seed source to generate Terahertz radiation. (C) 2008 Elsevier B.V. All rights reserved.

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The extraction kinetics of Sc, Y, La and Gd(III) from the hydrochloric acid medium using Cyanex 302 (hereafter HL) in heptane solution have been measured by the constant interfacial cell with laminar flow. Reaction regions are explored at liquid-liquid interface. Extraction regimes are deduced to be diffusion-controlled for Sc(Ill) and mixed controlled for Y, La and Gd(Ill). Extraction mechanisms are discussed according to the dimeric model of Cyanex 302 in non-polar solution. From the temperature dependence of rate measurement, the values of E-a, Delta H-+/-, Delta S-+/- and Delta G(300)(+/-) are calculated and it is found that the absolute values of these parameters keep crescent trend for Sc, Y, La and Gd(III). At the same time, it is found that it can easily achieve the mutual separation among the Sc, Y and La(III) with kinetics extraction methods.

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Este livro é um dos produtos científicos do II Encontro da Sociedade Brasileira de Melhoramento de Plantas - Regional DF, realizado nos dias 16 e 17 de dezembro de 2008, na Embrapa Cerrados, Planaltina, Distrito Federal. O tema central do evento "Pré-melhoramento, Melhoramento e Pós-melhoramento: estratégias e desafios" foi o escolhido como delineador das principais discussões. Este livro registra a memória do II Encontro da SBMP - regional-DF. Os livros e as cultivares apresentados foram lançados nos últimos anos com importante participação de pesquisadores, professores e profissionais do Distrito Federal.