993 resultados para Maturation des extrémités des ARN
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Charles-Marie de La Condamine nasceu em Paris, em 1701, e morreu, em 1774, na mesma cidade. Foi militar enquanto jovem, carreira que abandonou para dedicar-se ao estudo das ciências, sobretudo da Matemática, da Física, da História Natural e da Medicina. Seu interesse por novos conecimentos levou-o a participar de expedições científicas, entre as quais, a que descreve nesta obra.
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Voyage au Brésil narra a experiência de observar a vida e os costumes dos habitantes do Brasil e oferece um registro cheio de interesse sociológico e até científico. Segundo Rubens Borba de Moraes, " é obra valiosíssima sobre a Bahia colonial", sendo esta edição mais preciosa que a inglesa de 1805. A obra foi traduzida também para o alemão. Afonso de Taunay resume e comenta o livro de Lindley em Aventuras de Thomas Lindley.
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A história Bibliográfica de Sertum palmarum brasiliensium... é a seguinte: em 1900, o Deputado Federal por São Paulo, D. Augusto César Miranda Azevedo, apresentou ao Congresso Nacional uma emenda à proposta orçamentária para 1901, autorizando o Poder Executivo "a mandar imprimir na Imprensa Nacional o texto e as estampas da monografia sobre palmeiras do botânico brasileiro Dr. João Barbosa Rodrigues..." Entretanto, a autorização não pôde ser efetivada porque a Imprensa Nacional não dispunha de equipamento para a reprodução de estampas. Em 1901, o Senador pelo Estado do Pará, Dr. Lauro Sodré, apresentou emenda à proposta orçamentária para 1902, cuja lei estabeleceu no art. 6º : "é o Governo autorizado a mandar imprimir na Europa ou em país onde houver mais vantagem, a obra Sertum palmarum..., abrindo para tal fim o necessário crédito, e de acordo com o autor". O crédito -- duzentos contos de réis -- foi finalmente, aberto o Decreto nº 4.428, de 12 de junho de 1902, assinado por Campos Sales e referendado por Sabino Barroso, Ministro da Justiça. A obra foi impressa em Bruxelas sob a direção do próprio Barbosa Rodrigues, que, para esse fim ali se demorou nove meses. Trata-se de trabalho gráfico de primeira ordem, tanto pela reprodução colorida das estampas, como pelo texto e encadernação.
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Illustré de 12 dessins impremés en 2 couleurs
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Early illustrated book about fish, fishing and fisheries by one of the preeminent scientific investigators of the French enlightenment. This work deals extensively with the species of fish found in Europe and beyond, their habits and habitats, techniques and equipment used in fishing and fish processing, and many other aspects of these endeavours. Roughly 185 engraved plates illustrate the text. The scans for this version come from 3 volumes bound in two parts in folio.
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Contém os empreendimentos, as navegações e os gestos memoráveis dos portugueses, inclusive em suas colônias.
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Notas tipográficas retiradas de Brunet, v. 2, col. 1780.
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Discute o processo de reforma política no parlamento brasileiro a partir do estudo de caso da não aprovação do anteprojeto apresentado pelo relator na comissão especial de reforma política da Câmara dos Deputados em 2011.
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Der globale Handel mit Fischen und Fischereierzeugnissen funktioniert nur dann reibungslos, wenn sich die Handelspartner über die Qualität und Sicherheit der Produkte einig sind. Um diesen Handel zu erleichtern, tagen Experten aus aller Welt regelmäßig im CodexAlimentarius-Komitee für Fisch und Fischereierzeugnisse (CCFFP). Sie erarbeiten unter besonderer Beachtung des Gesundheitsschutzes der Verbraucher sowie der Sicherung fairer Praktiken im Handel internationale Lebensmittelstandards, Richtlinien und Vorschriften wie Codes of Practice. Die Mitarbeit in diesem Komitee ist auch aus dem Grunde besonders wichtig, da es eine Plattform dafür bietet, Ergebnisse aus eigener experimenteller forschender Tätigkeit direkt in hochrangige internationale Rechtsnormen umzusetzen, die unmittelbar dem Verbraucher und der betroffenen Lebensmittelindustrie zugute kommen, wie es beispielsweise bei der Grätendefinition, der Bestimmung des Fischkerngewichtes, der Bestimmung der Lebensfähigkeit von Nematoden, dem Heringsstandard, dem Standard für Fischstäbchen usw. der Fall war.
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The cod stock in the Western Baltic Sea is assessed to be overfished regarding the definitions of the UN World Summit on Sustainable Development at Johannesburg in 2002. Thus, the European Fisheries Council enforced a multi-annual management plan in 2007. Our medium term simulations over the future 10 years assume similar stock productivity as compared with the past four decades and indicate that the goals of the management plan can be achieved through TAC and consistent effort regulations. Taking account of the uncertainty in the recruitment patterns, the target average fishing mortality of age groups 3 – 6 years of F = 0.6 per year as defined in the management plan is indicated to exceed sustainable levels consistent with high long term yields and low risk of depletion. The stipulated constraint of the annual TAC variations of ±15% will dominate future fisheries management and implies a high recovery potential of the stock through continued reductions in fishing mortality. The scientific assessment of sustainable levels of exploitation and consideration in the plan is strongly advised, taking account of uncertainties attributed to environmental and biological effects. We recommend our study to be complemented with economic impact assessments including effects on by-catch species, which have been disregarded in this study. It is further demonstrated, that the goals of the management plan can alternatively be achieved by mesh size adaptations. An alternative technical option of mesh size increases to realize the required reductions in fishing mortality provides avoidance of discards of undersized fish after a few years by means of improved selectivity, another important element of the Common Fisheries Policy. However, it is emphasized that technical regulations since 1990 failed to affect the by-catch and discards of juvenile cod. In any way, the meaningful implementation of the multiannual management plan through stringent control and enforcement appears critical.
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A new concept for resource oriented federal research within the competence of the German Ministry of Food, Agriculture and Consumer Protection was implemented in 2008. The Johann Heinrich von Thünen-Institute, Federal Research Institute for Rural Areas, Forestry and Fisheries is one of 4 newly established large scale federal research institutions. It comprises the former Federal Research Centre for Fisheries, the Federal Research Centre for Forestry and Forest Products and large parts of the Federal Agricultural Research Centre. The institute is named after Johann Heinrich von Thünen, a famous national economist and social reformer of the 19th century. He developed the first serious treatment of spatial economics (the so-called Thünen rings) and the basics of the theory of the natural pay.
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Though the stocks of North Sea herring seemed to have recovered from small numbers since the mid-1990s we do recently observe a new decline in the spawning stock biomass. This is mainly caused by four consecutive years of small reproduction. Whilst the adults produce enough eggs and larvae only few survive until mature stages. The reasons for the bad recruitment are not clear. In this paper we investigate the influence of climate conditions, in particular the North Atlantic Oscillation (NAO) that obviously triggers the interaction between the size of the spawning stock and the abundance of larvae. We show that approximately 60 % of the recruitment variance can be explained by specific constellations of spawning stock size and climatic conditions. Beside physical factors we also discuss several working hypotheses shedding light on the influence of biological variables on the fluctuation of herring offspring.
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Mathematical modelling shows that the projection area of the trawl twine influencing its hydrodynamic resistance can be reduced by approx. 30 % through increasing the mesh size of the trawl wings and the conical parts of the trawls, in combi-nation with the use of thinner twine. The interrelation between fuel consumption and projection area of the trawl twine as well as the influence of the enlarged meshes of the wings and first panels on the catch composition can only be measured by trials on fishing boats.
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The basis for a long-term profitable fishery is a precautionary and environment-compatible use of fish stocks. The fishery management presently models the exploitation through the parameters of fishing mortality and the age at first capture. These two parameters are translated into the technical measures of fishing effort and mesh openings and quotas, which are then used in practice for controlling the fishery. Stock protection can be achieved by reducing the fishing effort, by assigning smaller quotas, by reducing the number of days at sea, or by increasing the mesh opening. The respective protection measures have different effects on the development of the stocks but also on the revenue obtained by the fishery. These alternatives have been examined taking as an example the cod stock in the western Baltic. The optimization goal was the maximization of profit observing at the same time the prerequisites for stock protection according to the precaution approach. For these calculations the same models and data have been used as are beeing used in the stock management of the ACFM of ICES. The response of altered technical measures to the recruitment of cod stock was considered, and a proposal to overcome overfishing of cod in the western Baltic Sea was derived.