oalib

Publish in OALib Journal

ISSN: 2333-9721

APC: Only $99

Submit

Any time

2020 ( 5 )

2019 ( 28 )

2018 ( 37 )

2017 ( 35 )

Custom range...

Search Results: 1 - 10 of 22171 matches for " Araujo Ricardo "
All listed articles are free for downloading (OA Articles)
Page 1 /22171
Display every page Item
Efeitos de varia??es cambiais em uma abordagem de dinamica de mudan?a estrutural à teoria do crescimento restrito pelo balan?o de pagamentos
Araujo, Ricardo Azevedo;
Economia e Sociedade , 2012, DOI: 10.1590/S0104-06182012000300005
Abstract: in this paper it is shown that once-for-all variations at the level of the exchange rate can play an important role in the sectoral composition of the economy. this fact has important implications in terms of a disaggregated version of thirlwall's law, even when the argument of the quantitative unimportance of relative price movements holds. the growth rate of a country is therefore shown to be affected by once-for-all movements at the level of nominal exchange rates and the concept of a natural exchange rate is introduced.
Efeitos de varia es cambiais em uma abordagem de dinamica de mudan a estrutural à teoria do crescimento restrito pelo balan o de pagamentos The effects of exchange rate variations in a structural economic dynamic approach to the balance of payment constrained growth theory
Ricardo Azevedo Araujo
Economia e Sociedade , 2012,
Abstract: Neste trabalho, mostra-se que varia es once-for-all do nível da taxa de cambio podem desempenhar um papel importante na composi o setorial da economia e tal fato tem implica es importantes em termos de uma vers o desagregada da Lei de Thirlwall mesmo diante do argumento da insignificancia quantitativa dos movimentos de pre os relativos. Mostra-se, ent o, que a taxa de crescimento de um país compatível com o equilíbrio no balan o de pagamentos pode ser afetada por movimentos do nível de taxas de cambio nominal e o conceito de uma taxa de cambio natural é introduzida. In this paper it is shown that once-for-all variations at the level of the exchange rate can play an important role in the sectoral composition of the economy. This fact has important implications in terms of a disaggregated version of Thirlwall's law, even when the argument of the quantitative unimportance of relative price movements holds. The growth rate of a country is therefore shown to be affected by once-for-all movements at the level of nominal exchange rates and the concept of a natural exchange rate is introduced.
Soybean Seed Co-Inoculation with Bradyrhizobium spp. and Azospirillum brasilense: A New Biotechnological Tool to Improve Yield and Sustainability  [PDF]
Mariangela Hungria, Marco Antonio Nogueira, Ricardo Silva Araujo
American Journal of Plant Sciences (AJPS) , 2015, DOI: 10.4236/ajps.2015.66087
Abstract: Legume nodulation by rhizobia can supply crops with nitrogen and reduce environmental impacts caused by chemical fertilization. The soybean crop in Brazil is an impressive example of how biological N2 fixation can be employed with a plant species of high economic value. However, the development of more productive cultivars, along with the increasing global climatic changes demand agricultural practices to become more productive and yet more environmentally friendly. Plant growth-promoting rhizobacteria (PGPR) are highly beneficial to agriculture worldwide, acting in plant nutrition, protection, and growth stimulation. Azospirillum is, certainly, the most employed PGPR in the world, but little is known about its interaction with rhizobia, when both are applied to legume seeds. We have evaluated the co-inoculation of bradyrhizobia and azospirilla on soybean seeds under different soil and climate conditions in Brazil. Our results demonstrated that co-inoculation is efficient and beneficial to the crop, and promotes yield increases without adding any chemical N fertilizers even in soils where established populations of soybean bradyrhizobia exist. The strategy of co-inoculation thus represents a new biotechnological tool to improve soybean yield without adding any chemical N fertilizers, thus contributing to current practices of sustainability in agriculture.
Novos cenários das políticas públicas na quest o ambiental: os entornos eco-sócio-terrotoriais
Araujo, Paulo Ricardo da Rocha
Civitas , 2005,
Abstract: Este artigo trata das rela es entre o Estado-redimensionado em sua fun o social - e os novos espa os e atores da sociedade contemporanea contextualizados a partir das quest es ambientais. Entendo as políticas públicas como forma de express o das expectativas e necessidades desses agentes, sua concep o, implementa o e avalia o ocorreriam de modo complexo em suas fases de planejamento e gest o ambiental. Tal condi o seria agravada em se tratando das complexas rela es de negocia o entre os distintos espa os, a saber, econ mico, cultural, político e, ainda, o espa o territorial, propriamente dito, que caracterizam as quest es ambientais.
Structural change and macrodynamic capabilities
Araujo, Ricardo Azevedo;Teixeira, Joanílio Rodolpho;
Nova Economia , 2011, DOI: 10.1590/S0103-63512011000300001
Abstract: in this paper we study some mechanisms that block a rapid diffusion of technological progress from advanced to underdeveloped countries. in order to accomplish this task we focus on two approaches that challenge the view that technological gaps between rich and poor nations are diminishing. the first is the structural economic dynamic approach and the second is the evolutionary view. both of them reveal that the elimination of technological gaps between rich and poor nations is more complex than what has been reported by the mainstream theory of economic growth.
Decisions on investment allocation in the post-keynesian growth model
Araujo, Ricardo Azevedo;Teixeira, Joanílio Rodolpho;
Estudos Econ?micos (S?o Paulo) , 2012, DOI: 10.1590/S0101-41612012000300007
Abstract: in this article the growth models of feldman (1928) and mahalanobis (1953) are extended to consider the analysis of decisions of investment allocation in the context of the post keynesian growth model. by adopting this approach it is possible to introduce distributive features in the feldman-mahalanobis model that allows us to determine the rate of investment allocation according to the equilibrium decisions of investment and savings. finally, an additional condition is added to the post keynesian growth model in order to fully characterise the equilibrium path in an extended version of this framework, where capital goods are also needed to produce capital goods.
Atlas digital: uma contribuicao para o sistema de informacoes do municipio de Sao Joao de Meriti – RJ
Ricardo Araujo Mathias,Liane Maria Azevedo Dornelles
Geografares , 2011,
Abstract: Um Atlas Digital é um atlas que pode ser acessado atraves de um computador, sendo possivel a utilizacao de uma variada gama de temas, formatos e escalas. Neste trabalho apresenta-se um prototipo de Atlas Digital como colaboracao ao Sistema de Informacao Municipal – SIM, para o municipio de Sao Jo o de Meriti, RJ. O SIM tem como meta os servicos municipais, sendo as suas informacoes fundamentais para a melhoria da gestao das prefeituras. A pesquisa foi direcionada para o tema da habitabilidade, que consiste num conjunto de condicoes voltadas para a criacao de um habitat saudavel, conseguinte foram trabalhados os subtemas: infraestrutura de abastecimento de agua, esgoto, coleta de lixo, saude e educacao.
Capital-Specific Technological Change and Human Capital Accumulation in a Model of Export-Led Growth
Ricardo Azevedo Araujo,Gilberto Tadeu Lima
PSL Quarterly Review , 2012,
Abstract: This paper contributes to the literature on economic growth by seeking to join several lines of research on structural factors in a more fully specified framework, on the one hand, and by making this more inclusive supply side to interact with demand factors in a model of export-led growth, on the other hand. Balance-of-payments constraints influence the adoption of investment-specific technological change which requires the import of capital goods, while the sectoral allocation of physical and human capital is likewise revealed to be crucial for growth, both results having important policy implications.
Sequential Injection Analysis of Ampicillin in Pharmaceuticals by Using Potentiometric Detectors Based on PVC and Sol-Gel Membranes  [PDF]
Nestor Zárate, Alberto N. Araujo, M. Concei?ao B. S. M. Montenegro, Ricardo Pérez-Olmos
American Journal of Analytical Chemistry (AJAC) , 2011, DOI: 10.4236/ajac.2011.24059
Abstract: This work describes the construction and the evaluation of the general performance of new ampicilli-nate-selective electrodes based on manganese (III) tetraphenylporphyrin [Mn(III) TPP-Cl] as ionophore, incorporated in both PVC and sol-gel membranes and directly applied onto a conductive graphite/epoxy resin support. The units were constructed without inner reference solution adopting conventional configuration and in the case of PVC membrane the tubular configuration was also adopted. The good working characteristics of these electrodes, made possible its application to the determination of ampicillin in pharmaceuticals formulations, both in conventional batch analysis and in flow conditions, when the electrodes were coupled to a SIA system. In the last case the potentiometric sensors presented linear response towards ampicillin concentration between 5.0 × 10–4 and 5.0 × 10–2 mol?l–1 with slopes of –57.4 and –63.5 mV?dec–1 for the PVC and sol-gel membranes, respectively. The developed procedures enable mean relative standard deviations better than 3% for all the samples analysed. The obtained results do not statistically differ from those furnished by applying the HPLC reference method.
Co-Inoculation of Soybean with Bradyrhizobium and Azospirillum Promotes Early Nodulation  [PDF]
Amaral Machaculeha Chibeba, Maria de Fátima Guimar?es, Osmar Rodrigues Brito, Marco Antonio Nogueira, Ricardo Silva Araujo, Mariangela Hungria
American Journal of Plant Sciences (AJPS) , 2015, DOI: 10.4236/ajps.2015.610164
Abstract: Soybean inoculation with elite strains of Bradyrhizobium to improve nodulation, N2 fixation, and grain yield is well established worldwide. However, when grown in soils where N is deficient, soybean undergoes an initial phase of N starvation that may last up to 20 days after seedling germination due to the lack of synchronism between the phase when seed N reserves are exhausted and the moment when plants begin to benefit from the nitrogen fixed by the bacteria. Practices that promote early nodulation may play a key role in reducing the N starvation period. Azospirillum is a plant growth promoting rhizobacteria (PGPR) that can stimulate root hair formation and root growth, creating more sites for early root infection and nodule formation by N2-fixing Bradyrhizobium spp. In this study, the effects of co-inoculating soybeans with Bradyrhizobium spp. and Azospirillum brasilense on nodulation precocity and N2 fixation were evaluated under greenhouse and field conditions. Nodule number and dry weight, as well as plant and root dry weight and N accumulated in shoots at 15, 18, 21, 24 and 30 days after emergence (DAE) were evaluated in response to inoculation with Bradyrhizobium spp. alone or when co-inoculated with Azospirillum sp. In the greenhouse, co-inoculated plants nodulated precociously as indicated by a significant increase (p < 0.05) in nodule biomass observed at (include) 21 DAE. More pronounced effects of co-inoculation were observed in the field as early as 18 DAE, suggesting that the presence of Azospirillum helps plants to overcome environmental stresses.
Page 1 /22171
Display every page Item


Home
Copyright © 2008-2017 Open Access Library. All rights reserved.