FCT: CQFB/REQUIMTE - Artigos em revista internacional com arbitragem científica
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- Long chain alkyl and alkenyl phenols from the roots of Ozoroa insignisPublication . Abreu, Pedro Jorge Macedo de; Liu, Yonghong; CQFB-REQUIMTE - Centro de Química Fina e Biotecnologia (Lab. Associado REQUIMTE); DQ - Departamento de Química; Sociedade Brasileira de Quimica / Sociedade Brasileira de Qu�mica, SBQAbstract : Bioassay-guided fractionation of the ethanolic root extract of Ozoroa insignis, collected in Guinea-Bissau, led to the isolation of a 41-member library of alkyl and alkenylphenols, whose structures were determined by 1H and 13C NMR, and GCMS. Determination of double-bond positions in the side chains of alkenylphenols were established by methylthiolation-GCMS. Resumo: O fracionamento biodirecionado do extrato etanólico das raízes da espécie Ozoroa insignis, colhida na Guiné-Bissau, conduziu ao isolamento de uma biblioteca de 41 compostos alquil- e alquenil-fenólicos, cujas estruturas foram elucidadas por RMN1H e 13C, e CGEM. A localização das insaturações nas cadeias laterais dos alquenil-fenóis foi determinada por CGEM dos respectivos derivados metiltiolados.
- Use Social Media Knowledge for Exploring the Portuguese Wine IndustryPublication . Pérez-Rodríguez, Gael; Baptista, João Pedro; Igrejas, Gilberto; Fdez-Riverola, Florentino; Lourenço, Anália; LAQV@REQUIMTE; IOS PressThis work presents an exploratory study that retrieves, processes, and analyses Twitter data to gain insights about the relevance and perceptions of the wine industry in the Douro Portuguese region (including Porto and Douro wines), as well as other regions in the country. The main techniques and algorithms used in our work belong to the families of natural language processing and machine learning, and the practical relevance of the proposed methodology has been proven in the analysis of 1.2 million unique messages from more than 764,000 distinct users retrieved from the Twitter platform. Derived results from this study are valuable to provide insights that can be further used in the context of Business Informatics to promote better and more efficient marketing campaigns, for example, centering the topic on the most interested people or communicating with the most appropriate words.
- Staphylococcus aureus and Methicillin-Resistant Coagulase-Negative Staphylococci in Nostrils and Buccal Mucosa of Healthy Camels Used for Recreational PurposesPublication . Silva, Vanessa; Caniça, Manuela; Manageiro, Vera; Verbisck, Newton; Tejedor-Junco, María Teresa; González-Martin, Margarita; Corbera, Juan Alberto; Poeta, Patrícia; Igrejas, Gilberto; LAQV@REQUIMTE; MDPI - Multidisciplinary Digital Publishing InstituteSeveral different species of animals host staphylococci as normal microbiota. These animals can be a source of staphylococci zoonotic infections. People with routine or occupational exposure to infected/colonized animals are at risk of a potential transmission. Therefore, we aimed to investigate the presence of S. aureus and other staphylococci in camels used for recreational purposes as well as their antimicrobial resistance, virulence factors and genetic lineages. A total of 172 samples were collected from 86 healthy camels (nose and mouth) from different farms located in the Canary Islands, Spain. Antimicrobial susceptibility testing was performed against 14 antimicrobial agents. The presence of virulence genes was studied by PCR. Multilocus sequence typing, spa typing and agr typing were performed in all S. aureus isolates. From the 86 camels tested, 42 staphylococci were isolated, of which there were 11 S. aureus, 13 S. lentus, 12 S. sciuri, 3 S. xylosus, S. epidermidis, S. hominis and S. chromogenes. Staphylococci isolates were resistant to penicillin, ciprofloxacin, clindamycin and fusidic acid. All S. aureus isolates harbored the hla, hlb and hld virulence genes. S. aureus isolates were ascribed to three sequence types (STs) and three spa types. All S. aureus isolates belonged to agr type III. Camels from Gran Canaria used in recreational purposes have a moderate prevalence of S. aureus and other coagulase-negative staphylococci. Nevertheless, S. aureus isolates are susceptible to almost all antibiotics tested.