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	Provedor de dados ArchiMer (1) Autor Abdel-aziz, Amal Kamal (1) Abdelfatah, Sara (1) Abdellatif, Mahmoud (1) Abdoli, Asghar (1) Abel, Steffen (1) Abeliovich, Hagai (1) Abildgaard, Marie H. (1) Abudu, Yakubu Princely (1) Acevedo-arozena, Abraham (1) Adamopoulos, Iannis E. (1) Adeli, Khosrow (1) Adolph, Timon E. (1) Adornetto, Annagrazia (1) Aflaki, Elma (1) Agam, Galila (1) Agarwal, Anupam (1) Aggarwal, Bharat B. (1) Agnello, Maria (1) Agostinis, Patrizia (1) Agrewala, Javed N. (1) Mais... Palavra-chave Autophagosome (1) Cance (1) LC3 (1) Lysosome (1) Macroautophagy (1) Neurodegeneration (1) Phagophore (1) Rflux (1) Stress (1) Vacuole (1) Mais... Tipo do documento Text (1) Ano 2021 (1) País France (1) Idioma Inglês (1)		Ordenar por:  Relevância Autor Título Ano Registros recuperados: 333 Primeira ... 1 2 3 4 5 6 7 8 9 ... Última African Regional Integration: Implications for Food Security AgEcon van Dijk, Michiel. This report looks at the African regional trade, regional integration agreements (RIAs) and the implications for food security. An overview is presented on the present state of African regional integration and the determinants of regional trade in agriculture and food commodities. In particular the study focuses on eight target countries, related RIAs and a set of strategic food commodities. The evidence presented in this study shows that African countries have made progress in opening up agriculture and food trade with partner countries. With, the exception of Ghana, Tanzania and Mozambique, the effective applied tariff rates for regional trade partners are substantially lower than the (MFN) rates applied to world trade partners. Nonetheless, regional... Tipo: Working or Discussion Paper Palavras-chave: Regional integration agreements; Africa; Food security.; Agricultural and Food Policy; Food Security and Poverty; International Development; International Relations/Trade. Ano: 2011 URL: http://purl.umn.edu/101645 Afrikaanse landbouwgigant wordt langzaam wakker Organic Eprints Johnson, Mike. De agrarische sector in Nigeria bloeide, totdat de olieindustrie opkwam. Van die industrie heeft slechts een klein deel van de bevolking geprofiteerd. Men komt nu tot het inzicht dat landbouw weer één van de pijlers van de economie zou moeten worden, en dat biologische land- bouw daarin een belangrijk aandeel moet hebben. Nigeria heeft nog veel te winnen. Tipo: Newspaper or magazine article Palavras-chave: Africa. Ano: 2011 URL: http://orgprints.org/18733/1/2514.pdf Agricultural Globalization in Reverse: The Impact of the Food Crisis in West Africa AgEcon Staatz, John M.; Dembele, Niama Nango; Kelly, Valerie A.; Adjao, Ramziath. Background paper for the Geneva Trade and Development Forum Crans-Montana, Switzerland September 17-20, 2008 Tipo: Conference Paper or Presentation Palavras-chave: Africa; Globalization; Food Security and Poverty; International Relations/Trade; Q11. Ano: 2008 URL: http://purl.umn.edu/55466 Agricultural Growth Linkages in Sub-Saharan Africa AgEcon Delgado, Christopher L.; Hopkins, Jane; Kelly, Valerie A.; Hazell, Peter B.R.; McKenna, Anna A.; Gruhn, Peter; Hojjati, Behjat; Sil, Jayashree; Courbois, Claude B.. The wide spread increase in rural purchasing power under the Green Revolution in Asia during the 1970s was key to increased rural employment and industrialization. Studies suggested that an extra dollar of agricultural income was typically associated with an additional $0.80 of nonagricultural income from local enterprises stimulated by the spending of farm house holds. Studies in Africa, where the Green Revolution was harder to discern, tended to be much more pessimistic. This report revisits these issues using especially detailed panel data sets on rural consumption and incomes, collected by IFPRI and collaborating national institutions for a variety of purposes during the mid to late 1980s in Burkina Faso, Niger, Senegal, Zambia, and Zimbabwe. Results... Tipo: Report Palavras-chave: Agriculture; Economic aspects; Africa; Sub- Saharan; Agriculture and state; International Development. Ano: 1998 URL: http://purl.umn.edu/37908 Agricultural Productivity Growth in Africa: Is Efficiency Catching-up or Lagging Behind? AgEcon Mugera, Amin W.; Ojede, Andrew. Recent empirical studies on agricultural productivity growth in African countries have produced mixed results; some find that uptake of new technology (technical progress) is the main source of total factor productivity growth while others point to improved use of existing technology (efficiency catch-up). This study tests for efficiency catch-up in the agricultural productivity of 33 African countries from 1966 to 2001. We use recent advances in data envelopment analysis (DEA) to generate standard and bootstrap bias corrected technical efficiency scores. In general, we find no evidence of efficiency catching-up. The standard DEA overestimated the efficiency scores of some countries due to small sample bias. Tipo: Conference Paper or Presentation Palavras-chave: Agriculture; Efficiency Catch-up; Bootstrap DEA; Africa; International Development; Production Economics. Ano: 2011 URL: http://purl.umn.edu/100687 Agricultural Statistics in Sub-Saharan Africa: Differences in Institutional Arrangements and their Impacts on Agricultural Statistics Systems. A Synthesis of Four Country Case Studies. AgEcon Kelly, Valerie A.; Donovan, Cynthia. A major push supporting improved data collection and analysis is required if African countries are to successfully design and implement results- based Poverty Reduction Strategy Programs (PRSP) and the Comprehensive Africa Agricultural Development Program (CAADP) being promoted by the New Partnership for African Development (NEPAD). Over the years there have been many initiatives to build statistical capacity in Africa. Many problems have plagued these efforts, including inadequate funding and... Tipo: Report Palavras-chave: Africa; Agriculture; Statistics; Institutions; Research and Development/Tech Change/Emerging Technologies; Q10. Ano: 2008 URL: http://purl.umn.edu/54558 Agricultural Subsidies and Forest Pressure in Malawi's Miombo Woodlands AgEcon Fisher, Monica G.; Shively, Gerald E.. This paper examines impacts of an agricultural subsidy program on forest pressure in Malawi. Using household survey data, we measure the effect on forest product marketing and on forest clearing of Malawi's Starter Pack Scheme (SPS). Regression results show households receiving a free packet of hybrid maize seed and chemical fertilizer (a "starter pack") had lower levels of commercial forest extraction than nonrecipient households. In addition, no measurable effect of starter pack receipt is found on forest clearing decisions, suggesting the program raised agricultural output without encouraging agricultural expansion. Findings thus indicate potential modest improvement in forest condition due to the SPS. Tipo: Journal Article Palavras-chave: Africa; Agricultural intensification; Conservation and development; Malawi; Tropical deforestation; Agricultural and Food Policy; Resource /Energy Economics and Policy. Ano: 2007 URL: http://purl.umn.edu/8646 Agricultural trade for food security in Africa: A Ricardian model approach AgEcon Diagne, Mandiaye; Abele, Steffen; Diagne, Aliou; Seck, Papa Abdoulaye. Regionalism and food security is a relatively neglected topic with very limited literature. We use a Ricardian trade model with multiple goods and countries which embeds a structure of gravity equation and yield variability. Our study shows that integration with African markets of staple foods is associated with higher growth, underpinning the need for growth strategies to emphasize scaling up and diversifying exports within Africa. Africa needs to unlock its high potential untapped land and fill up the yield gap. We found as well that enhanced competitiveness and reduced barriers to trade are the two critical areas of action. Tipo: Presentation Palavras-chave: Ricardian model; Yield variability; Agricultural trade; Staple foods; Africa; Agricultural and Food Policy; Food Security and Poverty; International Relations/Trade. Ano: 2012 URL: http://purl.umn.edu/123842 Alert at Maradi: Preventing Food Crises in West Africa by Using Price Signals AgEcon Araujo, Claudio; Araujo-Bonjean, Catherine; Brunelin, Stephanie. The aim of this paper is to exploit grain price data to detect the warning signs of looming food crises in Mali, Burkina Faso and Niger. Firstly we identify which markets play a leading role at the national and regional level. The second step consists of identifying crisis periods and characterizing price movements during the period proceeding a crisis. This analysis leads to the identification of early warning indicators whose relevance is tested using panel data qualitative choice models. The results show that monitoring price movements on "leading markets" during crucial periods of the year can help in forecasting future crises. Tipo: Conference Paper or Presentation Palavras-chave: Food security; Africa; Niger; Early warning systems; Discrete choice panel model; Food Security and Poverty; Q18; C25; D40; O18. Ano: 2011 URL: http://purl.umn.edu/114226 Alternative Instruments for Ensuring Food Security and Price Stability in Zambia AgEcon Dorosh, Paul A.; Dradri, Simon; Haggblade, Steven. Given heavy dependence on rainfed maize production, Zambia must routinely cope with pronounced production and consumption volatility in their primary food staple. Typical policy responses include increased food aid flows, government commercial imports and stock releases, and tight controls on private sector trade. This paper examines recent experience in Zambia, using a simple economic model to assess the likely impact of maize production shocks on the domestic maize price and on staple food consumption under alternative policy regimes. In addition to an array of public policy instruments, the analysis evaluates the quantitative impact of two key private sector responses in moderating food consumption volatility— private cross-border maize trade and... Tipo: Report Palavras-chave: Food security; Policy; Zambia; Africa; Price; Crop Production/Industries; Food Security and Poverty; Q18. Ano: 2007 URL: http://purl.umn.edu/54488 Ambient noise Rayleigh wave tomography across the Madagascar island ArchiMer Adimah, N I; Padhy, S. The unusual complex lithospheric structure of Madagascar is a product of a number of important geological events, including: the Pan-African Orogeny, episodes of Late Cenozoic intraplate volcanism and several phases of deformation and metamorphism. Despite this rich history, its detailed crustal structure remains largely underexplored. Here, we take advantage of the recently obtained data set of the RHUM-RUM (Réunion Hotspot and Upper Mantle–Réunions Unterer Mantel) seismological experiment, in addition to previously available data sets to generate the first Rayleigh wave group velocity maps across the entire island at periods between 5 and 30 s using the ambient noise tomography technique. Prior to preliminary data preparation, data from Ocean Bottom... Tipo: Text Palavras-chave: Seismic tomography; Africa; Crustal structure; Surface waves and free oscillations; Seismic noise.. Ano: 2020 URL: https://archimer.ifremer.fr/doc/00600/71184/69539.pdf An Assessment of the UN's Millennium Development Goals and its Millennium Declaration AgEcon Tisdell, Clement A.. The United Nations’ Millennium Declaration, passed by the General Assembly in September 2000, is assessed with particular attention being given to the Millennium Development Goals and associated targets outlined in the Declaration. The focus of the article is not so much on the extent to which these goals are being met but on the adequacy of the Declaration itself. The fundamental values outlined in the Declaration are listed and assessed. The Millennium Development Goals are means for the attainment of these values, along with some other objectives specified in the Declaration. Both sets of objectives are examined, with most attention being given to the Millennium Development Goals and Targets. The Millennium Development Goals aim to reduce social and... Tipo: Working Paper Palavras-chave: United Nations' Millennium Development Goals; Environmental sustainability; Poverty eradication; Africa; Community/Rural/Urban Development; Environmental Economics and Policy; International Development; International Relations/Trade; Labor and Human Capital. Ano: 2006 URL: http://purl.umn.edu/123453 AN EXAMINATION OF PROFIT INEFFICIENCY OF RICE FARMERS IN NORTHERN GHANA AgEcon Abdulai, Awudu; Huffman, Wallace E.. This paper employs a stochastic frontier model to examine profit inefficiency of rice farmers in the Northern Region of Ghana using farm-level survey data. The efficiency index, based on a half-normal distribution of the stochastic error term is related to farm and household characteristics. The empirical results show that farmers' human capital represented by the level of schooling contributes positively to production efficiency, suggesting that investment in farmers' education improves their allocative performance. Access to credit and greater specialization in rice production, are found to be positively related to production efficiency. A farmer's participation in nonfarm employment and being older, however, reduce production efficiency. Farmers... Tipo: Working or Discussion Paper Palavras-chave: Africa; Ghana; Production efficiency; Profit frontier; Rice; Crop Production/Industries. Ano: 1998 URL: http://purl.umn.edu/18271 An Impact Study of the Economic Partnership Agreements (EPAs) in the Six ACP Regions AgEcon Fontagne, Lionel; Laborde, David; Mitaritonna, Cristina. This article intends to present a very detailed analysis of the trade-related aspects of Economic Partnership Agreements (EPAs) negotiations. We use a dynamic partial equilibrium model – focusing on the demand side – at the HS6 level (covering 5,113 HS6 products). Two alternative lists of sensitive products are constructed, one giving priority to the agricultural sectors, the other focusing on tariff revenue preservation. In order to be WTO compatible, EPAs must translate into 90 percent of bilateral trade fully liberalised. We use this criterion to simulate EPAs for each negotiating regional block. ACP exports to the EU are forecast to be 10 percent higher with the EPAs than under the GSP/EBA option. On average ACP countries are forecast to lose 70... Tipo: Conference Paper or Presentation Palavras-chave: Preferential Trade Agreements; Africa; EPAs; Partial Equilibrium Simulations; International Relations/Trade. Ano: 2008 URL: http://purl.umn.edu/44194 Analyse des déterminants de la rentabilité du coton biologique et conventionnel au Bénin Organic Eprints Tovignan, D. Silvère; Sodjinou, Epiphane; Glin, Laurent C.; Hinvi, Jonas; Bonou-zin Dossi, Clariss Regina; Koussahoué, Stanislas; Nicolay, Gian L.. L’objectif de l’article est de faire une analyse financière comparative de la production du coton biologique et du coton conventionnel ainsi que les déterminants de leur rentabilité. L’étude a été conduite dans les communes de Glazoué, Banikoara et Tanguiéta appartenant à trois zones agro écologiques différentes. Dans chacune de ces communes, les données été collectées, dans des villages produisant les deux types de coton, sur un échantillon aléatoire stratifié de 215 producteurs (111 producteurs conventionnels et 104 biologiques). Il ressort des résultats obtenus que le coton biologique et le coton conventionnel sont rentables dans les trois zones d’étude. Le coton biologique a présenté les meilleures performances financières. D’une manière générale... Tipo: Journal paper Palavras-chave: Crop husbandry; Africa. Ano: 2018 URL: http://orgprints.org/34703/1/Tovignon_etal-2018_InternJInnovationSciResearch-Vol39-No1-p79-90.pdf Analysis of paternal lineages in Brazilian and African populations Genet. Mol. Biol. Carvalho,Mónica; Brito,Pedro; Lopes,Virgínia; Andrade,Lisa; Anjos,Mª João; Real,Francisco Corte; Gusmão,Leonor. The present-day Brazilian population is a consequence of the admixture of various peoples of very different origins, namely, Amerindians, Europeans and Africans. The proportion of each genetic contribution is known to be very heterogeneous throughout the country. The aim of the present study was to compare the male lineages present in two distinct Brazilian populations, as well as to evaluate the African contribution to their male genetic substrate. Thus, two Brazilian population samples from Manaus (State of Amazon) and Ribeirão Preto (State of São Paulo) and three African samples from Guinea Bissau, Angola and Mozambique were typed for a set of nine Y chromosome specific STRs. The data were compared with those from African, Amerindian and European... Tipo: Info:eu-repo/semantics/article Palavras-chave: Chromosome Y; STRs; Lineages; Brazil; Africa. Ano: 2010 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1415-47572010000300004 Ancyrocephalidae (Monogenea) of Lake Tanganyika: does the Cichlidogyrus parasite fauna of Interochromis loocki (Teleostei, Cichlidae) reflect its host’s phylogenetic affinities? Naturalis Pariselle, A.; Van Steenberge, M.; Snoeks, J.; Volckaert, F.A.M.; Huyse, T.; Vanhove, M.P.M.. The faunal diversity of Lake Tanganyika, with its fish species flocks and its importance as a cradle and reservoir of ancient fish lineages seeding other radiations, has generated a considerable scientific interest in the fields of evolution and biodiversity. The Tropheini, an endemic Tanganyikan cichlid tribe, fills a peculiar phylogenetic position, being closely related to the haplochromine radiations of Lakes Malawi and Victoria. Several problems remain regarding their genus-level classification. For example, the monotypic genus Interochromis is phylogenetically nested within Petrochromis; its only representative, I. loocki, has often been reclassified. As monogenean flatworms are useful markers for fish phylogeny and taxonomy, the monogenean fauna of... Tipo: Article / Letter to the editor Palavras-chave: Africa; Dactylogyridea; Petrochromis; Platyhelminthes; Species description; Tropheini; 42.81. Ano: 2015 URL: http://www.repository.naturalis.nl/record/515971 Ancyrocephalidae (Monogenea) of Lake Tanganyika: I: Four new species of Cichlidogyrus from Ophthalmotilapia ventralis (Teleostei: Cichlidae), the first record of this parasite family in the basin Rev. Bras. Zool. Vanhove,Maarten P. M.; Volckaert,Filip A. M.; Pariselle,Antoine. Examination of gill parasites from Ophthalmotilapia ventralis (Boulenger, 1898) in Lake Tanganyika (Africa) revealed the presence of four new species of Monogenea, all members of Cichlidogyrus Paperna, 1960 (Ancyrocephalidae). In view of the systematic importance of haptoral structure, the fish host shows a remarkable diversity of morphological groups. Cichlidogyrus vandekerkhovei sp. nov. and C. makasai sp. nov. are especially characterized by the unusual length of the dorsal transverse bar auricles, while C. sturmbaueri sp. nov. is distinguished by the unique shape of the accessory piece of its male copulatory organ. Importantly, C. centesimus sp. nov. displays a number of features new to the genus, namely a spirally coiled thickening at the end of the... Tipo: Info:eu-repo/semantics/article Palavras-chave: Cichlidogyrus vandekerkhovei sp. nov.; Cichlidogyrus makasai sp. nov.; Cichlidogyrus centesimus sp. nov.; Cichlidogyrus sturmbaueri sp. nov.; Africa. Ano: 2011 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1984-46702011000200016 Animal husbandry in Africa: Climate change impacts and adaptations AgEcon Seo, S. Niggol; Mendelsohn, Robert. This paper uses a cross-sectional approach to analyze the impacts of climate change on animal husbandry and the way farmers adapt. The study is based on surveys of almost 5000 livestock farmers across ten countries in Africa. A traditional Ricardian regression finds that the livestock net revenues of large farms in Africa are more sensitive to temperature than those of small farms. Cross-sectional analysis also reveals that large farms (but not small farms) have fewer animals per farm in warmer places. Farmers tend to select beef cattle and chickens in cool climates and goats and sheep in hot climates. Using the Ricardian results and examining climate scenarios for 2060 and beyond, the net revenues of small farms are predicted to increase as much as 120%... Tipo: Journal Article Palavras-chave: Climate change; Livestock; Impact; Adaptation; Africa; Livestock Production/Industries; Resource /Energy Economics and Policy; Q12; Q25. Ano: 2008 URL: http://purl.umn.edu/56968 Animal-friendly pig husbandry Organic Eprints Früh, Barbara. The guide explains the relevant aspects for animal-friendly husbandry systems to trainers based on the natural behaviour and needs of pigs. It presents proven solutions as well as relevant additional information on production issues. Tipo: Book Palavras-chave: Health and welfare; Pigs; Africa. Ano: 2016 URL: http://orgprints.org/30560/1/1713-animal-friendly-pig-husbandry.pdf Registros recuperados: 333 Primeira ... 1 2 3 4 5 6 7 8 9 ... Última

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