Search results for "degradación"
showing 10 items of 26 documents
Evaluación de los recursos naturales para un uso y gestión sostenible de la producción agraria en una cuenca del centro-sur de Córdoba (Argentina)
2001
The economical and social development in the Center-South of Cordoba, (Argentina) depends on the agriculture. However, due to low production and severe soil erosion, the farms are not longer economically feasible. This situation implies that the agriculture in the region might not be sustainable in the long run. This study assessed the potential production of the natural resources in the Santa Catalina basin, in order to improve their use and management. The estimated potential production is 300 % higher than the actual production. In addition, the basin is severely affected by water erosion. A new and more sustainable production structure was proposed for the basin, which increases from tr…
Análisis de la distribución del tamaño de parches de vegetación como indicador de degradación de los encinares mediterráneos
2019
[ES] La monitorización y la gestión de la Desertificación requieren de indicadores útiles y sencillos de aplicar que detecten a tiempo el momento crítico antes de que ésta sea irreversible. El presente trabajo analiza la universalidad de uno de estos indicadores, la relación entre número y tamaño de parches de vegetación, cuyo uso ha sido recomendado para monitorizar la desertificación, aplicándolo a encinares del Sistema Ibérico a lo largo de gradientes simultáneos de aridez y de uso.
Effect of Chitin Whiskers on the Molecular Dynamics of Carrageenan-Based Nanocomposites
2019
[EN] Films of carrageenan (KC) and glycerol (g) with different contents of chitin nanowhiskers (CHW) were prepared by a solution casting process. The molecular dynamics of pure carrageenan (KC), carrageenan/glycerol (KCg) and KCg with different quantities of CHWs as a filler was studied using dielectric relaxation spectroscopy. The analysis of the CHW effect on the molecular mobility at the glass transition, T-g, indicates that non-attractive intermolecular interactions between KCg and CHW occur. The fragility index increased upon CHW incorporation, due to a reduction in the polymer chains mobility produced by the CHW confinement of the KCg network. The apparent activation energy associated…
Urban growth (1956-2012) and soil sealing in the metropolitan area of Valencia (Eastern Spain)
2019
[EN] The aim of this study is to understand the urban growth dynamics from the mid-1950s to 2012 in the Metropolitan Area of Valencia, eastern Spain, and its impact on soils. The study area is a very interesting example of the many changes in land use and land cover in the landscape of Mediterranean alluvial plains. The analysis of urban growth was based on photo interpretation of aerial photographs and GIS based methodology. At a detailed scale (1:10,000), results show that there has been a highly dynamic process produced by the extent of land developed as urban area. In 1956 only 3,441 hectares (9.3% of the overall study area) were occupied by urban use. In 2012 the total sealed surface w…
Caracterización electroquímica del proceso de degradación de materiales piritosos en colecciones geológicas y paleontológicas: propuestas de tratamie…
2020
Este trabajo analiza los problemas de conservación y tratamiento de ejemplares paleontológicos y geológicos en los museos centrándonos en ejemplares piritizados, destacando los principales factores que afectan la preservación de este tipo de colecciones. Se ha realizado una intervención en ejemplares paleontológicos y geológicos en la cual han sido tratados para su adecuada conservación. Para caracterizar el proceso de degradación se ha realizado un estudio electroquímico sobre diversos ejemplares conservados en pirita y, de este modo, poder identificar estadios de la degradación presente de los ejemplares (producida en el curso del almacenamiento y conservación). La identificación de estos…
Bienes comunes de la humanidad
2003
Estudio de la proteína de membrana de Saccharomyces cerevisiae Rot1: Importancia de su dominio transmembrana
2016
Las proteínas de membranas corresponden a una fracción significativa, entre un 20-30%, del proteoma eucariota y están implicadas en una variedad de funciones celulares. Sin embargo, muchas veces su estudio es complicado, con respecto a sus contrapartes citoplasmáticas, debido principalmente a su naturaleza hidrofóbica. En el presente trabajo se caracterizó a Rot1, una proteína de membrana esencial de Saccharomyces cerevisiae. Esta proteína posee un dominio transmembrana (TM) en su extremo C-terminal necesario tanto para anclarse a la membrana del retículo endoplásmico (RE) como para la función de la proteína, la cual se desconoce, aunque se ha visto relacionada con diferentes procesos celul…
A comprehensive RNA-Seq-based gene expression atlas of the summer squash (Cucurbita pepo) provides insights into fruit morphology and ripening mechan…
2021
[EN] Background Summer squash (Cucurbita pepo: Cucurbitaceae) are a popular horticultural crop for which there is insufficient genomic and transcriptomic information. Gene expression atlases are crucial for the identification of genes expressed in different tissues at various plant developmental stages. Here, we present the first comprehensive gene expression atlas for a summer squash cultivar, including transcripts obtained from seeds, shoots, leaf stem, young and developed leaves, male and female flowers, fruits of seven developmental stages, as well as primary and lateral roots. Results In total, 27,868 genes and 2352 novel transcripts were annotated from these 16 tissues, with over 18,0…
Brewer's spent grains as biofuels in combustion-based energy recovery processes: Evaluation of thermo-oxidative decomposition
2022
[EN] The high global generation of wastes and side streams from agri-food production has led to environmental impact and causes nature degradation due to their uncontrolled management. These wastes are profitable materials with significant economic value that could otherwise be exploited as new sources in the feed industry or the production of bioenergy. Among them, brewer¿s spent grain (BSG) is a solid by-product generated in the beerbrewing process that consists of the barley grain husks together with parts of the pericarp and seed coat layer. Although it is rich in fibres and proteins, its main use is currently limited to animal feed or simply deposition to landfills. This study pursues …
Connecting the data landscape of long-term ecological studies: the SPI-Birds data hub
2021
The integration and synthesis of the data in different areas of science is drastically slowed and hindered by a lack of standards and networking programmes. Long-term studies of individually marked animals are not an exception. These studies are especially important as instrumental for understanding evolutionary and eco-logical processes in the wild. Furthermore, their number and global distribution provides a unique opportunity to assess the generality of patterns and to address broad-scale global issues (e.g. climate change).