O presente trabalho tem como objetivo investigar as concepções escolares, apresentando uma discussão do ponto de vista teórico-metodológico acerca destas construções produzidas no âmbito escolar, através de pesquisa etnográfica, utilizando o grupo focal, levando em conta a formação ideológica (ideias sobre si, o interlocutor e o assunto) e a formação discursiva (as marcas linguísticas, temáticas e de posição id...
Enquadramento: A campilobacteriose é considerada a principal causa de gastroenterite aguda de origem bacteriana em seres humanos, nos países desenvolvidos. Esta infeção está associada principalmente ao consumo e à contaminação cruzada de alimentos, sendo as aves o principal reservatório do agente patogénico. A utilização indiscriminada de antibióticos na produção animal e para fins veterinários, tem contribuído...
Helicobacter pylori infection is the major cause of paediatric peptic ulcer disease (PUD). In children with no other aetiology for the disease, this rare event occurs shortly after infection, presuming a still poorly understood higher susceptibility of the patient and highlighting the virulence of the implicated strain. Recently, we showed that the enhanced virulence of a group of paediatric ulcerogenic-strains...
C. difficile infection (CDI) is the cause of an intestinal disease mediated by two potent cytotoxins, TcdA and TcdB. Symptoms of CDI can range from asymptomatic colonization or mild diarrhea, to life-threatening inflammatory lesions such as pseudomembraneous colitis, toxic megacolon or bowel perforation. In part because of the recent emergence of so-called hypervirulent strains, especially (but not exclusively)...
This work aimed to characterize the coagulant properties of protein preparations from Moringa oleifera seeds to remove humic acids from water. Three distinct preparations were assayed, namely extract (seeds homogenized with 0.15 M NaCl), fraction (extract precipitated with 60 % w/v ammonium sulphate) and cMoL (protein purified with guar gel column chromatography). The extract showed the highest coagulant activi...
Moringa oleifera is an important source of antioxidants, tools in nutritional biochemistry that could be beneficial for human health; the leaves and flowers are used by the population with great nutritional importance. This work investigates the antioxidant activity of M. oleifera ethanolic (E1) and saline (E2) extracts from flowers (a), inflorescence rachis (b), seeds (c), leaf tissue (d), leaf rachis (e) and ...
Financiadores do RCAAP | |||||||
![]() |
![]() |
![]() |
![]() |
![]() |
![]() |