Several land crab species inhabit oceanic islands worldwide, where they often dominate terrestrial arthropod communities, and act as ecosystem engineers. In the South Atlantic, Johngarthia lagostoma is the only gecarcinid species, endemic to Rocas Atoll, Fernando de Noronha, Ascension, and Trindade. Despite its classification as ‘Endangered’, there is a gap in knowledge on the spatial and temporal distribution of this species....

The antihypertensive effects of nitrate and nitrite are widely described. Likewise, the physiological relevance of the nitrate-nitrite-nitric Oxide (NO) cycle in cardiovascular homeostasis is well known. Nevertheless, the mechanisms underlying the effects of nitrite are not completely understood, particularly in relation to S-nitrosothiol formation. On the other hand, the angiotensin-converting enzyme (ACE) plays a central rol...

A new species of Hyphessobrycon is described from a tributary of Rio Jatuarana, lower Rio Aripuanã basin, Rio Madeira basin, Apuí, Amazonas. The new species is part of the Hyphessobrycon agulha lineage, with the typical midlateral narrow black stripe immediately followed dorsally by an iridescent stripe. Its phylogenetic position is corroborated by the DNA barcoding methodology, which also indicates the new species as closely...

Snakebite envenomation is a neglected tropical disease and incidents of the pit viper Lachesis muta cause hemorrhage, muscle damage, blood coagulation disturbances, and even death; the proteases and phospholipase A 2 (PLA 2 ) of snake venoms contribute to such toxic effects. This work evaluated the inhibitory effect of commercial fucoidans from two species of brown seaweeds Fucus vesiculosus (FVF) and Undaria pinnatifida (UPF)...

Red macroalgae represent an underexplored yet promising resource due to their rich composition in proteins, pigments, and bioactive compounds with potential uses in nutraceutical, pharmaceutical, and agricultural industries. However, despite their abundance in coastal regions many species remain neglected and the development of efficient extraction and valorisation methods is still limited. This work assesses the optimization...

Pharmaceuticals are increasingly detected in surface water, and even at trace concentrations, they may pose ecological and health risks. In this study, heterogeneous photocatalysis using titanium dioxide (TiO 2 ) was applied under simulated solar irradiation to degrade sodium diclofenac. Irradiation times of 60, 120, and 180 min were used with a TiO 2 loading of 0.6 g L −1 . Under these conditions, only ~ 20% diclofenac degrad...

Model organisms are species selected for studies due to characteristics that make them ideal for research purposes. These species are chosen for their suitability for scientific investigations. For ecological and evolutionary studies, good model organisms typically exhibit the following characteristics: (1) small genome size; (2) rapid reproductive cycle; and (3) easy manipulation. A small genome size is important for quicker...