Thermal decomposition of the different particles size fractions of almond shells and olive stones. Thermal behaviour changes due to the milling processes

The aim of this study is to investigate the effect of particle size on the non-isothermal pyrolysis of almond shells (AS) and olive stones (OS) and to show possible differences in the composition of the different fractions obtained after milling and sieving. The results obtained from the study of different particle size of AS and OS samples show significant differences in the solid residue obtained and in the shape and overlapping degree of the peaks, especially with the smaller particle size. These differences can be due to different factors: (a) the amount of inorganic matter, which increases as particle size decreases, (b) heat and mass transfer processes, (c) different sample composition as a consequence of the milling process which may provoke changes in the structure and the segregation of the components (in addition to the ashes) increasingly changes the composition of the sample as the particle size decreases.

Work-related health problems among resident immigrant workers in Italy and Spain

Background: in both Spain and Italy the number of immigrants has strongly increased in the last 20 years, currently representing more than the 10% of workforce in each country. The segregation of immigrants into unskilled or risky jobs brings negative consequences for their health. The objective of this study is to compare prevalence of work-related health problems between immigrants and native workers in Italy and Spain. Methods: data come from the Italian Labour Force Survey (n=65 779) and Spanish Working Conditions Survey (n=11 019), both conducted in 2007. We analyzed merged datasets to evaluate whether interviewees, both natives and migrants, judge their health being affected by their work conditions and, if so, which specific diseases. For migrants, we considered those coming from countries with a value of the Human Development Index lower than 0.85. Logistic regression models were used, including gender, age, and education as adjusting factors. Results: migrants reported skin diseases (Mantel-Haenszel pooled OR=1.49; 95%CI: 0.59-3.74) and musculoskeletal problems among those employed in agricultural sector (Mantel-Haenszel pooled OR=1.16; 95%CI: 0.69-1.96) more frequently than natives; country-specific analysis showed higher risks of musculoskeletal problems among migrants compared to the non-migrant population in Italy (OR=1.17; 95% CI: 0.48-1.59) and of respiratory problems in Spain (OR=2.02; 95%CI: 1.02-4.0). In both countries the risk of psychological stress was predominant among national workers. Conclusions: this collaborative study allows to strength the evidence concerning the health of migrant workers in Southern European countries.

Promoción de salud para la generación de entornos saludables en un barrio vulnerable: el caso de Las Remudas, Gran Canaria

Las desigualdades sociales en salud se reflejan también en la segregación espacial de barrios que concentran desventajas estructurales generando entornos poco saludables. Este estudio describe las acciones y estrategias desarrolladas, dentro de un proceso de intervención socio-comunitaria en salud, para mejorar el entorno de un barrio desfavorecido y la percepción vecinal de las transformaciones vividas. Metodología: Se construye un estudio de caso a partir de entrevistas semiestructuradas a informantes clave. Resultado: los informantes reconocen la transformación del entorno en aspectos urbanísticos, ambientales y sociales y la importancia de su participación en ello. La apertura de nuevos comercios o la disminución de la criminalidad son indicadores objetivos de esta mejora. Conclusión: Las intervenciones de promoción de salud para mejorar el entorno deben considerar su multidimensionalidad y, por tanto, su abordaje multisectorial a través de metodologías participativas que involucren a los diversos actores sociales.