Luciana Retz de Carvalho

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While evaluating several laboratory-cultured cyanobacteria strains for the presence of paralytic shellfish poison neurotoxins, the hydrophilic extract of Microcystis aeruginosa strain SPC777—isolated from Billings’s reservoir, São Paulo, Brazil—was found to exhibit lethal neurotoxic effect in mouse bioassay. The in vivo test showed symptoms that(More)
The activities of bioactive compounds can be influenced by countless factors, including post-collection sample treatment. In this study, the activities of Ochtodes secundiramea extracts obtained using different processes are compared; the biomass was macerated immediately, lyophilized in liquid nitrogen, or dried in an oven at 50 °C after collection. The(More)
Seaweeds are subject to numerous biological interactions and sometimes to extreme abiotic conditions, so they have developed among other defense mechanisms, the ability to produce biologically active substances. Thus, these organisms produce mainly terpenes and phenols. Among others, the antifungal activity, due to its importance in human and animal health(More)
Livestock poisoning by plants is a frequent occurrence which determines severe losses, such as the fall in the milk and meat production, the cost of expensive treatments, the state of immunosuppression, or even the animal’s death. Cattle ingest toxic plants only when there is food shortage, when they cannot select what they eat, or when they ingest food for(More)
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