4 documents found, page 1 of 1
Impact of fifteen combinations of the main components of rosemary, lavender and...
Kharraf, Sara El; EL-GUENDOUZ, Soukaina; Farah, Abdellah; Mateus, Maria Da Conceição; Hadrami, El Mestafa El; Miguel, Maria GracaSince ancient times, essential oils or their volatiles have been used in food, health and aromatherapy. Essen-tial oils are complex mixtures constituted by dozens of compounds, which makes it difficult to attribute their biological properties to this or that compound or compound combinations. Moreover, the quantification of the volatiles is generally made through their relative percentage abundances. In the pre...
O "menu químico" das plantas: uma abordagem ao ensino da química no ensino secu...
Rio, Carolina; Mateus, Maria Da ConceiçãoO papel da interdisciplinaridade na sedimentação de conceitos básicos e estruturantes para o desenvolvimento da aprendizagem em química pode ser implementado através de pequenos projetos que implicam a realização de procedimentos laboratoriais repetitivos conducentes ao desenvolvimento da memória de longo prazo, bem como criativos e de interligação de conceitos. O projeto aqui apresentado é uma proposta de trab...
Structure, anti-Phytophthora and anti-tumor activities of a nortriterpenoid fro...
Mateus, Maria Da Conceição; Neves, Dina; Dacunha, Bruno; Laczko, Endre; Maia, Cristiana; Teixeira, Rúben; Cravador, AlfredoTo investigate bioactive compounds potentially involved in the biotic interactions exhibited by Phlomis purpurea (Lamiaceae) in rhizospheres infested with Phytophthora cinnamomi, the plant rhizome was chemically analysed. The nortriterpenoid (175)-2 alpha,3 alpha,11 alpha,23,24-pentahydroxy-19(18 -> 17)-abeo-28-norolean-12-en-18-one, was isolated and its structure was elucidated by comprehensive spectroscopic a...
Solution and surface photochemistry of fenarimol: a comparative study
Silva, José P. da; Mateus, Maria Da Conceição; Silva, Abílio M. da; Ferreira, Luís F. Vieira; Burrows, Hugh D.The photochemistry of the pesticide fenarimol was studied in methanol and on a cellulose surface. The ground state absorption and fluorescence spectra are similar in solution and at the solid/gas interface. Room temperature phosphorescence emission was observed in cellulose. Transient absorption of fenarimol and of its chromophoric units, chlorobenzene and pyrimidine, showed a common absorption band centered at...