853 resultados para post-embrionic development
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Cytoplasmic polyadenylylation is an evolutionarily conserved mechanism involved in the translational activation of a set of maternal messenger RNAs (mRNAs) during early development. In this report, we show by interspecies injections that Xenopus and mouse use the same regulatory sequences to control cytoplasmic poly(A) addition during meiotic maturation. Similarly, Xenopus and Drosophila embryos exploit functionally conserved signals to regulate polyadenylylation during early post-fertilization development. These experiments demonstrate that the sequence elements that govern cytoplasmic polyadenylylation, and hence one form of translational activation, function across species. We infer that the requisite regulatory sequence elements, and likely the trans-acting components with which they interact, have been conserved since the divergence of vertebrates and arthropods.
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"From Transactions of the Royal Society of South Australia, vol. xlvi., 1922."
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Vol. 1 originally issued 1943 with imprint: Philadelphia, United Lutheran Publication House.
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Resolución 676(XXXV) Calendario de conferencias de la CEPAL para el período 2015-2016 .-- Resolución 677(XXXV) Conferencia Regional sobre la Mujer de América Latina y el Caribe .-- Resolución 678(XXXV) Conferencia Estadística de las Américas de la Comisión Económica para América Latina y el Caribe .-- Resolución 679(XXXV) Respaldo a la labor del Instituto Latinoamericano y del Caribe de Planificación Económica y Social (ILPES) .-- Resolución 680(XXXV) Comité de Desarrollo y Cooperación del Caribe .-- Resolución 681(XXXV) Conferencia Regional sobre Población y Desarrollo de América Latina y el Caribe .-- Resolución 682(XXXV) Establecimiento de la Conferencia Regional sobre Desarrollo Social de América Latina y el Caribe .-- Resolución 683(XXXV) Admisión de San Martín como miembro asociado de la Comisión Económica para América Latina y el Caribe .-- Resolución 684(XXXV) Prioridades y programa de trabajo de la Comisión Económica para América Latina y el Caribe para el bienio 2016-2017 .-- Resolución 685(XXXV) Actividades de la Comisión Económica para América Latina y el Caribe en relación con el seguimiento de los Objetivos de Desarrollo del Milenio y la aplicación de los resultados de las grandes conferencias y cumbres de las Naciones Unidas en las esferas económica y social y esferas conexas .-- Resolución 686(XXXV) Aplicación del Principio 10 de la Declaración de Río sobre el Medio Ambiente y el Desarrollo en América Latina y el Caribe .-- Resolución 687(XXXV) La dimensión regional de la agenda para el desarrollo después de 2015 .-- Resolución 688(XXXV) Cooperación Sur-Sur .-- Resolución 689(XXXV) Lugar del próximo período de sesiones .-- Resolución 690(XXXV) Resolución de Lima .-- Resolución 691(XXXV) Conferencia Ministerial sobre la Sociedad de la Información de América Latina y el Caribe.
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Resolution 676(XXXV) ECLAC calendar of conferences for the period 2015-2016 .-- Resolution 677(XXXV) Regional Conference on Women in Latin America and the Caribbean .-- Resolution 678(XXXV) Statistical Conference of the Americas of the Economic Commission for Latin America and the Caribbean .-- Resolution 679(XXXV) Support for the work of the Latin American and Caribbean Institute for Economic and Social Planning .-- Resolution 680(XXXV) Caribbean Development and Cooperation Committee .-- Resolution 681(XXXV) Regional Conference on Population and Development in Latin America and the Caribbean .-- Resolution 682(XXXV) Establishment of the Regional Conference on Social Development in Latin America and the Caribbean .-- Resolution 683(XXXV) Admission of Sint Maarten as an associate member of the Economic Commission for Latin America and the Caribbean .-- Resolution 684(XXXV) Programme of work and priorities of the Economic Commission for Latin America and the Caribbean for the 2016-2017 biennium .-- Resolution 685(XXXV) Activities of the Economic Commission for Latin America and the Caribbean in relation to follow-up to the Millennium Development Goals and implementation of the outcomes of the major United Nations conferences and summits in the economic, social and related fields .-- Resolution 686(XXXV) Application of Principle 10 of the Rio Declaration on Environment and Development in Latin America and the Caribbean .-- Resolution 687(XXXV) The regional dimension of the post-2015 development agenda .-- Resolution 688(XXXV) South-South cooperation .-- resolution 689(XXXV) Place of the next session .-- Resolution 690(XXXV) Lima resolution .-- Resolution 691(XXXV) Ministerial Conference on the Information Society in Latin America and the Caribbean.
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Résolution 676(XXXV) Calendrier de conférences de la CEPALC pour la période 2015-2016 .-- Résolution 677(XXXV) Conférence régionale sur les femmes de l’Amérique latine et des Caraïbes .-- Résolution 678(XXXV) Conférence statistique des Amériques de la Commission économique pour l’Amérique latine et les Caraïbes .-- Résolution 679(XXXV) Appui aux travaux de l’Institut latino-américain et des Caraïbes de planification économique et sociale (ILPES) .-- Résolution 680(XXXV) Comité de développement et de coopération des Caraïbes .-- Résolution 681(XXXV) Conférence régionale sur la population et le développement de l’Amérique latine et des Caraïbes .-- Résolution 682(XXXV) Création de la Conférence régionale sur le développement social de l’Amérique latine et des Caraïbes .-- Résolution 683(XXXV) Admission de Saint-Martin en qualité d’état membre associé de la Commission économique pour l’Amérique latine et les Caraïbes .-- Résolution 684(XXXV) Priorités et programme de travail de la Commission économique pour l’Amérique latine et les Caraïbes pour la période biennale 2016-2017 .-- Résolution 685(XXXV) Activités de la Commission économique pour l’Amérique latine et les Caraïbes dans le cadre du suivi des objectifs du Millénaire pour le développement et l’application des résultats des grandes conférences et des sommets des Nations Unies en matière économique et sociale et dans les domaines connexes .-- Résolution 686(XXXV) Application du Principe 10 de la Déclaration de Rio sur l’environnement et le développement en Amérique latine et dans les Caraïbes .-- Résolution 687(XXXV) La dimension régionale du programme de développement pour l’après 2015 .-- Résolution 688(XXXV) Coopération Sud-Sud .-- Résolution 689(XXXV) Lieu de la prochaine session .-- Résolution 690(XXXV) Résolution de Lima .-- Résolution 691(XXXV) Conférence ministérielle sur la société de l’information de l’Amérique latine et des Caraïbes.
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The Politics of the New Germany takes a new approach to understanding politics in the post-unification Federal Republic. Assuming only elementary knowledge, it focuses on debates and issues in order to help students understand both the workings of Germany's key institutions and some of the key policy challenges facing German politicians. Written in a straightforward style by four experts, each of the chapters draws on a rich variety of real-world examples. Packed with boxed summaries of key points, a guide to further reading and a range of seminar questions for discussion at the end of each chapter, this book highlights both the challenges and opportunities facing policy-makers in such areas as foreign affairs, economic policy, immigration, identity politics and institutional reforms. The book also takes a bird's-eye view of the big debates that define German politics over time, regardless of which party happens to be in power. It pinpoints three key themes that have characterised German politics over the last sixty years; reconciliation, consensus and transformation. Table of Contents: Introduction 1. Germany and the Burden of History 2. Germany’s Post-War Development, 1945-1989 3. Towards German Unity? 4. A Blockaded System of Government? 5. The Party System and Electoral Behaviour: The Path to Stable Instability? 6. Economic Management: The End of the German Model? 7. Citizenship and Demographics: A Country of Immigration? 8. The Reform of the Welfare State? 9. Germany and the European Union: A European Germany or a German Europe? 10. Foreign and Security Policy: A New Role for the Twenty-First Century? 11. Conclusion
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The present political climate in which the ideals of entrepreneurship and self-help are strongly encouraged has drawn attention to those ethnic minorities noted for their entrepreneurial activity. Since the Chinese appear to be an exemplary case in point, this thesis focusses upon the historical material conditions which have led to the formation of a Chinese 'business* community in Britain, both past and present As such, it rejects the theories of cultural determinism which characterise most studies of the Chinese. For rather than representing the endurance of cultural norms, the existence of the contemporary Chinese 'niche' of ethnically exclusive firms in the catering industry is due to the conjunction of a number of historical processes. The first is the imperialist expansion into China of Britain's capitalist empire during the nineteenth century which established a relationship of dependency upon the interests of British capital by colonial Chinese labour. The second is the post war development of the catering industry and its demand for cheap labour as administered by the British state together with the contemporaneous development of the agricultural economy of colonial Hong Kong. Far from representing a source of material benefit to all, the ethnic Chinese 'niche' in catering is highly exploitative and merely underlines the racial oppression of Chinese in Britain. Attempts to promote business interests within the ethnic community therefore serve merely to entrench the structures of oppression.
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The periconceptional period, embracing the terminal stages of oocyte growth and post-fertilisation development up to implantation, is sensitive to parental nutrition. Deficiencies or excesses in a range of macro- and micronutrients during this period can lead to impairments in fertility, fetal development and long-term offspring health. Obesity and genotype-related differences in regional adiposity are associated with impaired liver function and insulin resistance, and contribute to fatty acid-mediated impairments in sperm viability and oocyte and embryo quality, all of which are associated with endoplasmic reticulum stress and compromised fertility. Disturbances to maternal protein metabolism can elevate ammonium concentrations in reproductive tissues and disturb embryo and fetal development. Associated with this are disturbances to one-carbon metabolism, which can lead to epigenetic modifications to DNA and associated proteins in offspring that are both insulin resistant and hypertensive. Many enzymes involved in epigenetic gene regulation use metabolic cosubstrates (e.g. acetyl CoA and S-adenosyl methionine) to modify DNA and associated proteins, and so act as 'metabolic sensors' providing a link between parental nutritional status and gene regulation. Separate to their genomic contribution, spermatozoa can also influence embryo development via direct interactions with the egg and by seminal plasma components that act on oviductal and uterine tissues. © IETS 2014.
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The exponential growth of studies on the biological response to ocean acidification over the last few decades has generated a large amount of data. To facilitate data comparison, a data compilation hosted at the data publisher PANGAEA was initiated in 2008 and is updated on a regular basis (doi:10.1594/PANGAEA.149999). By January 2015, a total of 581 data sets (over 4 000 000 data points) from 539 papers had been archived. Here we present the developments of this data compilation five years since its first description by Nisumaa et al. (2010). Most of study sites from which data archived are still in the Northern Hemisphere and the number of archived data from studies from the Southern Hemisphere and polar oceans are still relatively low. Data from 60 studies that investigated the response of a mix of organisms or natural communities were all added after 2010, indicating a welcomed shift from the study of individual organisms to communities and ecosystems. The initial imbalance of considerably more data archived on calcification and primary production than on other processes has improved. There is also a clear tendency towards more data archived from multifactorial studies after 2010. For easier and more effective access to ocean acidification data, the ocean acidification community is strongly encouraged to contribute to the data archiving effort, and help develop standard vocabularies describing the variables and define best practices for archiving ocean acidification data.
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This synthesis dataset contains records of freshwater peat and lake sediments from continental shelves and coastal areas. Information included is site location (when available), thickness and description of terrestrial sediments as well as underlying and overlying sediments, dates (when available), and references.
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Ocean acidification and global warming are occurring concomitantly, yet few studies have investigated how organisms will respond to increases in both temperature and CO2. Intertidal microcosms were used to examine growth, shell mineralogy and survival of two intertidal barnacle post-larvae, Semibalanus balanoides and Elminius modestus, at two temperatures (14 and 19°C) and two CO2 concentrations (380 and 1,000 ppm), fed with a mixed diatom-flagellate diet at 15,000 cells ml-1 with flow rate of 10 ml-1 min-1. Control growth rates, using operculum diameter, were 14 ± 8 µm day-1 and 6 ± 2 µm day-1 for S. balanoides and E. modestus, respectively. Subtle, but significant decreases in E. modestus growth rate were observed in high CO2 but there were no impacts on shell calcium content and survival by either elevated temperature or CO2. S. balanoides exhibited no clear alterations in growth rate but did show a large reduction in shell calcium content and survival under elevated temperature and CO2. These results suggest that a decrease by 0.4 pH(NBS) units alone would not be sufficient to directly impact the survival of barnacles during the first month post-settlement. However, in conjunction with a 4-5°C increase in temperature, it appears that significant changes to the biology of these organisms will ensue.