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The effect of environmental factors on transepithelial potential in a model Amazonian teleost, the tambaqui (Colossoma macropomum): Implications for sodium balance in harsh environments.
J Fish Biol
January 2025
Laboratory of Ecophysiology and Molecular Evolution, Brazilian National Institute for Research of the Amazon (INPA), Manaus, Brazil.
The tambaqui (Colossoma macropomum, G. Cuvier 1818) thrives both in the ion-poor waters of the Amazon and in commercial aquaculture. In both, environmental conditions can be harsh due to low ion levels, occasional high salt challenges (in aquaculture), low pH, extreme PO levels (hypoxia and hyperoxia), high PCO levels (hypercapnia), high ammonia levels (in aquaculture), and high and low temperatures.
View Article and Find Full Text PDFA method for in silico exploration of potential glioblastoma multiforme attractors using single-cell RNA sequencing.
Sci Rep
October 2024
Scientific Computing Program, Oswaldo Cruz Foundation (FIOCRUZ), Rio de Janeiro, 21041-222, Brazil.
We presented a method to find potential cancer attractors using single-cell RNA sequencing (scRNA-seq) data. We tested our method in a Glioblastoma Multiforme (GBM) dataset, an aggressive brain tumor presenting high heterogeneity. Using the cancer attractor concept, we argued that the GBM's underlying dynamics could partially explain the observed heterogeneity, with the dataset covering a representative region around the attractor.
View Article and Find Full Text PDFThe importance of protected areas for threatened Brazilian butterflies.
An Acad Bras Cienc
October 2024
Universidade Estadual de Campinas, Instituto de Biologia, Departamento de Biologia Animal and Museu de Diversidade Biológica, Rua Monteiro Lobato, 255, 13083-862 Campinas, SP, Brazil.
Article Synopsis
- * However, only 41.7% of these records are in fully protected zones, and 27% of species have less than half their records in PAs, indicating some are entirely unprotected.
- * Notably, 42.6% of critically endangered butterflies are found outside PAs, with almost all records occurring in the highly threatened Atlantic Forest and Cerrado ecosystems, underscoring the need for better conservation efforts.
Experimental study of rock fracture behavior under direct tension using three-dimensional digital image correlation.
Sci Rep
August 2024
School of Civil Engineering, Chongqing University of Arts and Sciences, Chongqing, 402160, China.
Understanding the mechanical characteristics of rocks when subjected to direct tension is crucial for assessing the stability of rock formations. Within the scope of this research, a series of tests was conducted using Tage tuff to assess the deformation behavior and crack extension of rock under direct tension. The axial, lateral, and shear strain fields as well as crack propagation, localized deformation behavior, and failure mode of the rocks were analyzed using three-dimensional digital image correlation method.
View Article and Find Full Text PDFPrevalence of sexually transmitted infections and human papillomavirus in cervical samples from incarcerated women in São Paulo, Brazil: a retrospective single-center study.
Front Public Health
August 2024
Post Graduation Program in Health Sciences, Santo Amaro University, São Paulo, Brazil.
Article Synopsis
- - Incarcerated women face severe health risks, particularly high rates of sexually transmitted infections (STIs) like HPV, which can lead to serious complications in the female reproductive system.
- - A study of 299 women in a São Paulo prison found a 62.2% prevalence of HPV, with a significant percentage of high-risk strains, along with a 72.8% prevalence of other STIs, indicating a critical public health issue.
- - The findings suggest that there is a need for enhanced health policies in Brazil targeting female prisoners, including better screening and treatment strategies to reduce STI incidence and prevent cervical cancer.
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