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Metal contents in honey and mushrooms from serpentine soils in the Morais site
Ramalhosa, Elsa; Magalhães, Marta; Afonso, Maria João A.P.S.; Plasencia, Paula; Saraiva, Daniel; Azevedo, João; Castro, MarinaMorais site, located in the northeast of Portugal, is known by its geology because it is one of the most representative areas of ultramafic rocks. This kind of soils has particular chemical characteristics, such as high levels of some heavy metals, namely chromium (Cr) and nickel (Ni). However, in Morais site several non-wood forest products (NWFP) are collected by the local community, and, so, it is of great i...
Metal contents in honey and mushrooms from serpentinite soils in the Morais site
Ramalhosa, Elsa; Magalhães, Marta; Afonso, Maria João A.P.S.; Plasencia, Paula; Saraiva, Daniel; Azevedo, João; Castro, MarinaThe Morais Natura 2000 Site (PTCON0023), located in the northeast of Portugal, is an area of very high geological and botanical interest. This site has in its core the Morais Ophiolite Complex that is one of the most representative areas of ultramafic rocks, and the largest continuous unit of serpentine soils in Portugal. These soils have particular chemical characteristics, such as high levels of some heavy me...
Polymer laboratory: an educational approach
Barreiro, M.F.; Plasencia, Paula; Afonso, Maria João A.P.S.; Silva, Adília; Ferreira, OlgaPolymers are part of our everyday lives. They assume different forms such as plastics, fibres, foams and elastomers. Its prevalence in modern society and impact on several industrial sectors is well recognized and motivates the development of different educational tools to support the demonstration of polymer chemistry principles, very often hard to rationalize. This work aims to present the work developed with...
Synthesis and photochromic behaviour of new methyl induced linear and angular t...
Queiroz, Maria João R. P.; Plasencia, Paula M. S.; Dubest, Roger; Aubard, Jean; Guglielmetti, Robert J.New methyl induced linear and angular thieno-2H-chromenes 4, 5 and 6 were prepared by reaction of new methylated 6-hydroxybenzo[b]thiophenes 2 (a, b and c) and propargylic alcohols 3a and 3b, using acidic Alumina Brockmann I as catalyst and drying agent. Compounds 2 were prepared in good to excellent yields in a “one pot” three step reaction from the corresponding bromo compounds 1. The photochromic behaviour ...
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