Encontrados 266 documentos, a visualizar página 1 de 27
Managing arbuscular mycorrhizal fungi for bioprotection: Mn toxicity
Brito, I.; Carvalho, M.; Alho, L.; Goss, M. J.We investigated whether an intact extraradical mycelium (ERM) is more effective than other forms of propagule from indigenous arbuscular mycorrhizal fungi (AMF) in providing protection against stress to a host plant. The response of wheat (Triticum aestivum L.) to Mn toxicity was studied in a two-phase greenhouse experiment. In Phase 1, four Mn tolerant species from the natural vegetation, ranging from strongly...
New test methodologies to analyse direct expansion solar assisted heat pumps fo...
Facão, Jorge; Carvalho, M. J.Since there are not specific standards for testing direct expansion solar assisted heat pumps for domestic hot water, new testing methodologies are proposed supported by laboratory experiments. Two methodologies were developed for performance measurement: modified BIN method and long term performance prediction with a TRNSYS model validated with specific experimental conditions. The long term performance predic...
UNISOL: solar combistore evaluation and optimization
Amorim, Ricardo; Facão, Jorge; Rodrigues, João Carlos Teixeira; Carvalho, M. J.In the frame of UNISOL project, a test bench was installed to perform tests of a combistore which includes a two-way heat exchanger already submitted to a national patent application. The present work describes the main characteristics of the test bench installed and the tests performed with the objective of optimization of the configuration of the inner storage tank of the combistore (two way heat exchanger),...
Stability of LaNiO3 gas diffusion oxygen electrodes
Silva, R. A.; Soares, C. O.; Carvalho, M. D.; Rangel, C. M.; Pereira, M. I. da SilvaIn this work LaNiO3 perovskite-type oxide, prepared by a self-combustion method, was optimized for activity and stability as an anode material for water electrolysis. A full electrochemical study was conducted in order to kinetically characterize electrodes prepared using carbon paper as a base for porous gas-diffusion electrodes in alkaline media, regarding water oxidation and oxygen reduction reactions at roo...
Relating air Pollution and Respiratory Diseases Occurrences
Teodoro, M. F.; Garcia, J. N.; Coelho, L. M.; Carvalho, M. G.Com o apoio RAADRI. ; In this article we study the impact of air pollution on children's health in Portugal. In particular, we focus our attention on the city of Barreiro. We use the general linear methods (GLM), taking advantage of all the ease of handling and analyzing data in order to relate air quality and health. We relate levels of air pollution and incidence of entries from children with symptoms of res...
Interaction between Arbuscular Mycorrhizal Fungi and rhizobia on the growth of ...
Alho, L.; Carvalho, M.; Goss, M. J.; Brito, I.When Arbuscular Mycorrhizal (AM) colonization started from an intact extraradical mycelium (ERM) its bioprotective effect on subclover was enhanced in comparison with other sources of inoculum. The presence in the soil of an intact ERM, developed previously on mycotrophic plants tolerant to Mn toxicity, resulted in the earlier colonization of subclover, reduced Mn concentration in the roots, improved developmen...
Climatologia e anos meteorológicos de referência para o Sistema Nacional de Cer...
Aguiar, Ricardo; Carvalho, M. J.; Gonçalves, HelderRelatório produzido pelo LNEG no âmbito da revisão do Sistema Nacional de Certificação de Edifícios.
UNISOL: solar combistore evaluation and optimization
Amorim, Ricardo; Facão, Jorge; Rodrigues, João Carlos Teixeira; Carvalho, M. J.In the frame of UNISOL project, a test bench was installed to perform tests of a combistore which includes a two-way heat exchanger already submitted to a national patent application. The present work describes the main characteristics of the test bench installed and the tests performed with the objective of optimization of the configuration of the inner storage tank of the combistore (two way heat exchanger),...
The earrings of Pancas treasure: Analytical study by X-ray based techniques – A...
Tissot, I.; Tissot, M.; Manso, M.; Alves, L. C.; Barreiros, Maria Alexandra; Marcelo, Teresa; Carvalho, M. L.; Corregidor, V.; Guerra, M. F.The development of new metallurgical technologies in the Iberian Peninsula during the Iron Age is well represented by the 10 gold earrings from the treasure of Pancas. This work presents a first approach to the analytical study of these earrings and contributes to the construction of a typological evolution of the Iberian earrings. The manufacture techniques and the alloys composition were studied with three co...
Components of solar thermal systems
Mendes, J. Farinha; Carvalho, M. J.; Schossig, PeterThe heat production sub-system is the part of the overall system which provides heat to a thermally driven air-conditioning system. With regards to the solar-driven equipment, the solar collector is the main component of the sub-system. A brief review on the present state-of-the-art with respect to performance characteristics and available certification schemes of solar collectors is given in the following chap...
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