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Monitorization of alveolar deposited surface area of nanoparticles and ultrafin...
Albuquerque, Paula; Gomes, João P.; Bordado, J.; Reis, M.Nanotechnology is an important emerging industry with a projected annual market of around one trillion dollars by 2015. It involves the control of atoms and molecules to create new materials with a variety of useful functions. Although there are advantages on the utilization of these nano-scale materials, questions related with its impact over the environment and human health must be addressed too, so that pote...
Preparation of Poly(vinyl chloride) Latexes Using a Dual Surfactant System: The...
Tomás, A.; Gil, M. H.; Bordado, J. C.; Gonçalves, P.; Rodrigues, P.The control of the average particle size and size distribution in the emulsion polymerization of vinyl chloride monomer is an important parameter to determine, not only the latex characteristics, but also the properties of the final dispersion powder in several industrial applications. It is possible to manipulate the particle size distribution (PSD) by applying a mixture of an anionic surfactant-fatty alcohol ...
New heterogeneous catalysts for trans-esterification of triglycerides
Gomes, João F.; Puna, J. F.; Bordado, J. Carlos; Correia, M. JoanaThis paper describes preliminary work done towards the development of new metallic heterogeneous catalysts to be used in the transesterification reaction of triglycerides, which is of considerable interest in the production of biodiesel. Biodiesel, is a mixture of mono-alkyl esters of fatty acids, and is currently manufactured by transesterification of triglycerides with methanol using NaOH or KOH as liquid bas...
Efeito dos polímeros AN9OS e FO4550SH na infiltração e perda de solo num solo M...
Fernandez, P.; Ferreira, A.G.; Bordado, J.Artigo apresentado como comunicação no I Congresso Nacional das Ciências do Solo que decorreu em Lisboa, no Instituto Superior de Agronomia de 23 a 27 de Junho de 2001. ; Neste estudo comparou-se o efeito da aplicação dos polímeros AN905 (aniónico muito fraco) e FO4550SH (catiónico forte) na infiltração e perda de solo, em relação à testemunha (solo sem tratamento), através de chuva artificial (21,6 mm h-1) co...
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