CELIS SÁNCHEZ, Raquel, SEPÚLVEDA GIRALDO, Claudia Alejandra. Contra el despojo. Capitalismo, degradación ambiental y desplazamiento forzado, CEAR-Euskadi. Bilbao, 2012. 139 pp

CELIS SÁNCHEZ, Raquel, SEPÚLVEDA GIRALDO, Claudia Alejandra. Contra el despojo. Capitalismo, degradación ambiental y desplazamiento forzado, CEAR-Euskadi. Bilbao, 2012. 139 p

Best local approximations by abstract norms with non-homogeneous dilations

We introduce a concept of best local approximation using abstract norms and non-homogeneous dilations. The asymptotic behavior of the normalized error function as well as the limit of some net of best approximation polynomials Pε as ε → 0 are studied.Fil: Yanzon, Norma Beatriz. Universidad Nacional de San Luis. Facultad de Ciencias Físico- Matemáticas y Naturales; Argentina. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - San Luis. Instituto de Matemática Aplicada de San Luis "Prof. Ezio Marchi". Universidad Nacional de San Luis. Facultad de Ciencias Físico, Matemáticas y Naturales. Instituto de Matemática Aplicada de San Luis "Prof. Ezio Marchi"; ArgentinaFil: Zo, Felipe. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - San Luis. Instituto de Matemática Aplicada de San Luis "Prof. Ezio Marchi". Universidad Nacional de San Luis. Facultad de Ciencias Físico, Matemáticas y Naturales. Instituto de Matemática Aplicada de San Luis "Prof. Ezio Marchi"; Argentina. Universidad Nacional de San Luis. Facultad de Ciencias Físico- Matemáticas y Naturales; Argentin

Phenological aspects of six gallery forest species of the Federal District in Brazil

A fenologia de Vochysia piramidalis, Tapirira guianensis, Talauma ovata, Tococa formicaria, Miconia pseudonervosa e Miconia chamissois foi acompanhada de abril de 1994 a setembro de 1995, em dez indivíduos de cada espécie. Todas foram perenifólias, sugerindo relação com a presença de água no solo. Vochysia piramidalis e T. guianensis apresentaram padrão de floração atrasada em relação ao início das chuvas; T. ovata, T. formicaria e M. pseudonervosa, floração precoce; e M. chamissois, floração tardia. Quanto à duração da floração, M. pseudonervosa e T. formicaria apresentaram período longo e V. piramidalis, T. ovata, T. guianensis e M. chamissois, período curto. Vochysia piramidalis revelou padrão de dispersão anemocórico, com curto período de formação e maturação dos frutos. As demais, padrão zoocórico. Miconia pseudonervosa apresentou maturação variando dentro e entre indivíduos. Talauma ovata exibiu frutos imaturos por período extenso, mas com maturação rápida e simultânea no mesmo indivíduo. A produção foi abundante em T. guianensis, com maturação simultânea dentro do mesmo indivíduo e intervalos curtos entre os períodos reprodutivos. T. formicaria e M. chamissois apresentaram um período relativamente curto de frutificação, porém com maturação não-simultânea dentro do mesmo indivíduo. A frutificação das espécies zoocóricas foi durante o período chuvoso, coincidindo com o período de dispersão de animais.The phenology of Vochysia piramidalis, Tapirira guianensis, Talauma ovata, Tococa formicaria, Miconia pseudonervosa and Miconia chamissois were observed weekly, from April/94 to September/95, on ten individuals of each specie. All species presented perennial leaves maybe due to soil water availability. According to the beginning of the rainy season, V. piramidalis and T. guianensis presented delayed flowering, T. ovata, T. formicaria and M. pseudonervosa precocious flowering, while M. chamissois was classified as late. Miconia pseudonervosa and T. formicaria showed a long period of flowering and V. piramidalis, T. ovata, T. guianensis and M. chamissois a short one. Vochysia piramidalis showed anemochorous dispersal pattern and all the other five species showed zoochorous. Miconia pseudonervosa showed ripeness varying among and within plant. Talauma ovata also showed a long period of immature fruits, but with simultaneous and quick ripening within the same tree. Tapirira guianensis presented a large period of fruit production, simultaneous ripeness and short intervals between reproductive periods. Tococa formicaria and M. chamissois showed a non-simultaneous short fruiting period within the same tree. In general, the zoocoricous species showed fruiting period within the rainy season, with corresponding animal dispersal period

Stem Cells and Cardiac Disease: Where are We Going?

During the last 10 years we have witnessed the development of a new field in research termed Stem Cell Therapy. Classically, it was considered that cells had a limited division and differentiation ability; however, this dogma was challenged when new exciting results about cell multi/pluripotency were presented to the scientific community. It was found that cells from one adult tissue source were able to originate cells of a very different type. The possibility of transplanting these cells into damaged organs with the aim of substituting sick or dead tissue, triggered many studies to understand the plasticity of the stem cells and their potential in pathological situations. Nowadays, much more is understood about stem cells, although of course, many questions, especially about their mechanism of action, still need to be answered. Their benefit after transplantation has been shown experimentally and even clinically in some cases; however, the degree of stem cell contribution through their own differentiation into the transplanted tissue, has turned out to be generally low, and increasing evidence indicates that a trophic effect must play an important role in such a benefit. A better understanding of the paracrine mechanisms involved could be of great relevance in order to develop new therapies focused on stimulating endogenous cells. On the other hand, more sophisticated methods for cell transplantation combined with bio-engineering techniques have been devised in cardiac disease models. In this review we will try to provide a critical overview of the stem cell studies performed until now and to discuss some of the questions raised about the mechanisms that are involved in their putative reparative effect in cardiovascular diseases, and their origin

Invariant surfaces for toric type foliations in dimension three

A foliation is of toric type when it has a combinatorial reduction of singularities. We show that every toric type foliation on (C3, 0) without saddle-nodes has invariant surface. We extend the argument of Cano-Cerveau for the nondicritical case to the compact dicritical components of the exceptional divisor. These components are projective toric surfaces and the isolated invariant branches of the induced foliation extend to closed irreducible curves. We build the invariant surface as a germ along the singular locus and those closed irreducible invariant curves. The result of OrtizBobadilla-Rosales-Gonzalez-Voronin about the distribution of invariant branches in dimension two is a key argument in our proof

CORPORATE SOCIAL RESPONSIBILITY: THE ROLE OF CODES OF CONDUCT IN FOSTERING ENVIRONMENTAL SUSTAINABILITY IN LATIN AMERICA

Spanish multinational enterprises (MNEs) are a prime example of how companies benefit from globalization and expand their activities worldwide through foreign direct investment. This paper has a legal perspective, focusing on the environmental performance of Spanish MNEs in Latin America and their corporate social responsibility (CSR) through the adoption of codes of conduct. As a result of a set of factors, Spanish MNEs have implemented voluntary CSR initiatives, strategies and standards in their day-to-day operations. This paper analyses the scope of codes of conduct that are aimed at achieving environmental sustainability in Latin America. The guiding question is whether these codes of conduct are able to influence the environmental performance of Spanish MNEs operating in the region

Sistemas agrarios tradicionales, medio ambiente y desarrollo sostenible: la dehesa como hecho geográfico y cultural

Los sistemas agrarios extensivos, sobre todo los ganaderos, se encuentran actualmente en un momento de cambio vinculado no sólo a los esquemas tradicionales de explotación, sino también a las nuevas funciones que deben asumir en materia de multifuncionalidad económica y, a su vez, ambiental. En este artículo sus autores plantean pormenorizadamente la situación actual de estos agrosistemas desde un punto de vista integrado y global dentro de un marco más amplio como lo es la ordenación de los territorios rurales.The extensive agrarian systems –and, above all, the cattle raisers– are presently found in a moment of change linked not only to the plans of traditional exploitation but also to the new functions that should be assumed in terms of economic and, at the same time, environmental multifunctionality. In this article its authors introduce, in detail, the present situation of these farming ecosystems from an integrated and global point of view, within a bigger framework such as the ordering of the rural territories