Variation in the diet composition and weight-length relationship of small characids in urbanized and forested streams.

The diet of indicator fish species plays a crucial role in assessing ecosystem health. This study evaluated streams with and without urban influences, focusing on abiotic parameters and the trophic ecology of Psalidodon fasciatus and Piabina argentea. Forested streams exhibited higher redox potential, dissolved oxygen, transparency, and depth, whereas urban streams had higher temperatures, greater widths, and increased levels of total dissolved solids, conductivity, total coliforms, and thermotolerant coliforms.

Fibrinolytic enzyme from Arthrospira platensis and its effects on breast cancer cells: Exploring its potential as an innovative therapy.

Fibrinolytic enzymes are promising in treating cardiovascular diseases due to their capacity to dissolve blood clots. The fibrinolytic enzyme from Arthrospira platensis (FEAP) was purified by ion exchange chromatography to investigate its ability to activate plasminogen, as well as its thrombolytic and fibrinogenolytic potential. Subsequently, two different cytotoxic assays (MTT and NR) and hemolysis test were performed to evaluate FEAP's safety.

Viability of microencapsulated species of Trichoderma as a strategy to optimize use in biological control.

The increasing use of chemical fungicides without effective control of phytopathogens has led to the development of resistance in microorganisms. As a promising alternative, products formulated with Trichoderma have emerged for their sustainable and effective potential in integrated disease management. However, the predominant formulations do not offer the necessary protection against abiotic factors.

Purification and characterization of a protease produced by submerged fermentation: Ultrasound-enhanced collagenolytic protease from Streptomyces parvulus.

Proteases are a large group of enzymes in high demand due to their wide and different biotechnological applications mainly in the biomedical field. Ultrasound (US) has been used successfully in several Bioprocesses in biotechnology, such as in the upregulation of enzymatic hydrolysis (biocatalysis). The objective of this work was to purify an enzyme from Streptomyces parvulus and to characterize it through physic-chemical applications including ultrasound effect.