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Characterization of molecular factors from plants pathogen Phytophthora cinnamomi
Choupina, Altino; Martins, Fátima; Vaz, Madalena; Dominguez, Angel; Martins, I.M.The culture of the chestnut tree is extremely important in the northern region of Portugal, occupying a significant proportion of useful agricultural area. The annual average chestnut production in Portugal can reach 20 000 tons. New plantation areas have increased in the last few decades. However the ink disease caused by the oomycete Phytophthora cinnamomi has damage and killed many trees and up to now no con...
Characterization of a glucanase inhibitor protein from Phytophthora cinnamomi i...
Martins, I.M.; Martins, Fátima; Belo, Hélio; Vaz, Madalena; Choupina, AltinoOomycetes from the genus Phytophthora are fungos-likeplant pathogens that are devastating fr agriculture and natural ecosystems. Due to their partucular physiological characteristics, no eficiente tratmentts, it against diseases caused by these microorganisms are presently available. To develop such treatments, it appears essential to dissect the molecular mechanisms that determine the interaction between Phy...
Synthesis of polyurethane-urea microcapsules with perfume for textile application
Rodrigues, S.N.; Martins, I.M.; Mata, V.G.; Barreiro, M.F.; Rodrigues, A.E.This work is a contribution to the introduction of emergent technologies in the textile sector, namely the microencapsulation of fragrances and its application to obtain added-value products. Polyurethane/urea microcapsules with a perfume have been produced using the interfacial polymerization technology for industrial application on textile substrate having in view man suits production. The specific objective ...
Microencapsulation by coacervation of biodegradable polymer with thyme oil
Martins, I.M.; Rodrigues, S.N.; Barreiro, M.F.; Rodrigues, A.E.The objective of this work is to develop a novel coacervation process to produce microcapsules of PLA to encapsulate thyme oil that will be used in cosmetics. PLA is soluble in organic solvents but insoluble in water. Generally, PLA is used to encapsulate water soluble active principles such as drugs, pesticides and dye-stuffs by coacervation, mainly by means of microspheres production or by using double emulsi...
Microencapsulation of thyme oil by coacervation
Martins, I.M.; Barreiro, M.F.; Rodrigues, A.E.In this work we have developed a process to encapsulate thyme oil using PLA as the wall material. Firstly, an oil-in-water (o/w) emulsion stabilized with tween 20 (HLB of 16,7) and a solution of PLA in dimethylformamide (DMF) have been prepared. Thereafter, the PLA solution was added to the previously prepared o/w emulsion. The o/w emulsion was obtained by dispersion with an ultraturrax and the encapsulation pr...
Ceramic products obtained from rock wastes
Catarino, L.; Sousa, J.; Martins, I. M.; Vieira, M. T.; Oliveira, M. M.Residue powders resulting from cutting and machining operations in slate quarries were processed by a press and sintering route to manufacture ceramic products such as flooring and roofing tiles. The first part of this work consisted of a laboratory study carried out by uniaxially pressing the powders to shape and sintering in air using a muffle type furnace. A plan of sintering experiments was followed in orde...
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