5 documents found, page 1 of 1
Rubella antibodies in cord blood sera in Portugal: association with maternal ag...
Frade, J.; Nunes, C.; Mesquita, J. R.; Nascimento, M. São José; Gonçalves, G.This study evaluated the impact of maternal vaccination against rubella on the levels of specific rubella IgG (rIgG) in 198 newborn cord sera samples. Detailed maternal vaccination data were available. Specific rIgG was measured using a commercial enzyme immunoassay. Most mothers (78.8%) had been vaccinated against rubella at least once in their lives. In 15 (7.6%) cord sera samples, the concentration of specif...
Designing strontium titanate-based thermoelectrics: insight into defect chemist...
Kovalevsky, A. V.; Aguirre, M. H.; Populoh, S.; Patrício, S. G.; Ferreira, N. F.; Mikhalev, S. M.; Fagg, D. P.; Weidenkaff, A.; Frade, J.Driven by a need to develop low-cost and thermally stable materials for thermoelectric applications, donor-substituted strontium titanate is considered as a promising alternative to traditional thermoelectrics. The complex defect chemistry of SrTiO3-based materials imposes various limitations on identifying the relevant effects exerted on the electronic band structure and heat transfer, being a subject of debat...
Persistence of rubella and mumps antibodies, following changes in the recommend...
Gonçalves, G.; Frade, J.; Nascimento, M. S. J.; Mesquita, João R.; Nunes, C.In Portugal, the recommended age for the second dose of MMR (MMR2) was changed from 10-13 years to 5-6 years for those born in 1994 and afterwards. This study aimed to assess if MMR schedule and time elapsed from the last dose are associated with the concentration of rubella and mumps IgG antibodies. Three Portuguese birth cohorts (convenience samples) were selected for this study (66, 59 and 41 participants bo...
Microanalytical study of the fresco ‘the good and the bad judge’ in the medieva...
Gil, M.; Araujo, C.; Carvalho, M.L.; Longelin, S.; Dias, L.; Valadas, S.; Souto, C.; Frade, J.; Ribeiro, I.; Mirao, J.; Candeias, A.This article describes a study carried out on the emblematic mural painting so-called ‘fresco of the good and bad judge’ located at the medieval village of Monsaraz (southern Portugal). This painting, with two distintic narratives, is thematically unique in Portugal and rare in the context of European Renaissance art. Scientific research was undertaken to clarify doubts about the chronology of the two painted s...
Magnetite/hematite core/shell fibres grown by laser floating zone method
Ferreira, N. M.; Kovalevsky, A.; Valente, M. A.; Costa, F. M.; Frade, J.Magnetite (Fe3O4) is a very important material due to its unique physical and chemical properties. However, the low redox stability and tendency towards oxidation impose certain limitations on the conditions, where Fe3O4 can be successfully used. A possibility to control and prevent oxidation of Fe3O4 thus represents an important challenge for materials engineering. In the present work, the laser floating zone ...