72 documents found, page 1 of 8
Impact of polysorbate 80 on the antimicrobial activity of oregano and thyme
Carvalho, Marta; Barbosa, Joana; Silva, Marcelo Belchior Rosendo da; Albano, Helena; Teixeira, PaulaPlant-derived essential oils (EOs) possess significant antimicrobial potential against spoilage and pathogenic microorganisms. However, their efficacy can vary depending on the test method, making it difficult to standardise results. This study aimed to investigate the effect of polysorbate 80, a common surfactant used to emulsify EOs, on antimicrobial activity and minimum inhibitory concentration (MIC) determi...
Phenolic Profile and Antioxidant and Biological Activities of Plant Extracts Ri...
Melo, Adma N.F.; Afonso, Tiago B.; Pedrosa, Mariana C.; Carvalho, Marta; Rodrigues, Cláudia; Dias, Maria Inês; Ribeiro, Tânia; Machado, ManuelaIn this work, hydroethanolic plant extracts (acorn husk, laurel, eucalyptus, and rockrose leaves) were screened for their content in condensed tannins (HPLC-DAD/MS), polyphenol content, antioxidant, antimicrobial, and antiviral activities, and lack of toxicity. The results showed the highest values of condensed tannins found for laurel and eucalyptus extracts, while the total phenolic content ranged within 204....
Evaluation of different virulence factors across Acinetobacter species
Carvalho, Marta; Barbosa, Joana; Teixeira, PaulaSeveral Acinetobacter species are prevalent in various food-related environments, including fresh produce, dairy products, and meat. These species have been identified as potential causative agents of a wide range of foodborne diseases, with an impact for both consumer health and food safety. While they have traditionally been considered low-grade pathogens, recent studies suggest that Acinetobacter infections ...
Medical Devices for the Management of Patients with Epilepsy
Carrola Costa, João; Dias, Leonor; Carvalho, MartaThe increasing number of medical devices developed and marketed towards management of patients with epilepsy reflects the growing interest in translating technological advances and knowledge about epilepsy into better healthcare for this population. The objective of this narrative literature review is to analyze the available options of medical devices for detecting, treating, and recording epileptic seizures, ...
Antimicrobial activity of in-situ bacterial nanocellulose-zinc oxide composites...
Silva, Francisco A. G. Soares; Carvalho, Marta; Carvalho, Teresa Bento de; Gama, Miguel; Poças, Fátima; Teixeira, PaulaActive substances such as zinc oxide nanoparticles (ZnO) have been extensively explored due to their antimicrobial properties, low cost and scalability. Yet, their effectiveness is highly dependent on their morphology and specific surface area. Bacterial nanocellulose (BNC) is a suitable carrier due to its ability to transport and deliver active substances. In the case of nanocellulose-ZnO composites, conclusio...
Characterization of the toxigenic potential of bacillus cereus sensu lato isola...
Oliveira, Márcia; Carvalho, Marta; Teixeira, PaulaBacillus cereus is estimated to be responsible for 1.4–12% of all food poisoning outbreaks worldwide. The objective of this study was to investigate the toxigenic potential of 181 isolates of B. cereus previously recovered from different types of berries and berry products (strawberries, raspberries, blackberries, and blueberries) by assessing the presence of enterotoxin genes (hblA, hblC, hblD, nheA, nheB, nhe...
Red grape pomace extract: bioactive potential against bacteria, fungi and SARS-...
Melo, Adma; Afonso, Tiago B.; Carvalho, Marta; Rodrigues, Cláudia; Ribeiro, Tânia; Carocho, Márcio; Pinto, Miguel Marques; Tavaria, FreniThe outbreak of COVID-19 disease caused by SARS-CoV-2 forced the scientific world to search for new alternatives to help control the virus. Grape pomace, which is an industrial residue obtained from the winemaking process, has bioactive compounds derived from the grape [1], which can be a starting point for research on the use this residue as a source of new antiviral agents. Thus, the objective of this study w...
Exploring the correlations between epi indicators of COVID-19 and the concentra...
Silva, Ana Rita Pereira; Mesquita, D. P.; Duarte, Maria Salomé Lira; Pereira, M. Fernando R.; Alves, M. M.; Monteiro, Sílvia; Santos, RicardoThe COVID-19 pandemic caused by the SARS-CoV-2 virus led to changes in the lifestyle and human behaviour, which resulted in different consumption patterns of some classes of pharmaceuticals including curative, symptom-relieving, and psychotropic drugs. The trends in the consumption of these compounds are related to their concentrations in wastewater systems, since incompletely metabolised drugs (or their metabo...
Antimicrobial activity of in-situ bacterial nanocellulose-zinc oxide composites...
Silva, Francisco A. G. Soares; Carvalho, Marta; Carvalho, Teresa Bento de; Gama, F. M.; Poças, Fátima; Teixeira, PaulaActive substances such as zinc oxide nanoparticles (ZnO) have been extensively explored due to their antimicrobial properties, low cost and scalability. Yet, their effectiveness is highly dependent on their morphology and specific surface area. Bacterial nanocellulose (BNC) is a suitable carrier due to its ability to transport and deliver active substances. In the case of nanocellulose-ZnO composites, conclusio...
Exploring the correlations between epi indicators of COVID-19 and the concentra...
Silva, Ana R.; Mesquita, Daniela P.; Salomé Duarte, M.; Lado Ribeiro, Ana R.; Pereira, M.Fernando R.; Madalena Alves, M.; Monteiro, SílviaThe COVID-19 pandemic caused by the SARS-CoV-2 virus led to changes in the lifestyle and human behaviour, which resulted in different consumption patterns of some classes of pharmaceuticals including curative, symptom-relieving, and psychotropic drugs. The trends in the consumption of these compounds are related to their concentrations in wastewater systems, since incompletely metabolised drugs (or their metabo...