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Fabrication of sensors by 3D printing combines speed, freedom of design, and the possibility of using waste as a substrate. Various results have been obtained in a circular economy mode, whereby residues usually thrown away are instead used as low-cost resources. A highly creative solution involving the printing of electrochemical sensors on fallen tree leaves has now been presented by a team of researchers in Brazil led by Bruno Janegitz, a professor at the Federal University of São [...]

Some 27% of Brazilian children and adolescents suffer from musculoskeletal pain of unspecified cause, according to a study reported in the Brazilian Journal of Physical Therapy. The problem is frequently underestimated by parents and health professionals, the authors of the article note, and an understanding of its true extent will contribute to better planning of public health policy regarding treatment of chronic pain in adults, the leading cause of disability in the world. In Brazil, the [...]

Photoelectrochemical processes have been considered sustainable alternatives for the remediation of water contaminated by domestic or industrial effluents. Simply put, the strategy consists of using solar energy to degrade organic pollutants. In an article published in the journal Chemosphere, researchers in Brazil describe the synthesis of several different semiconductor materials that can be used as photoanodes. Photoanodes are the medium for the photogeneration of electrons to produce [...]

Utilizing Artificial Intelligence in Mapping Low Levels of Phosphorus in Amazonian Soil   The Amazon rainforest is not only a vital ecosystem for the planet but also a crucial resource for biodiversity and climate regulation. However, the health of the Amazonian soil, particularly in terms of nutrient levels such as phosphorus, plays a significant role in the sustainability of this ecosystem. In recent years, advancements in artificial intelligence (AI) technology have revolutionized [...]

Researchers in Brazil have revealed that some frogs scream at such a frequency that other animals can hear it but it’s completely inaudible to humans. While they were in the Amazonian jungle studying frogs, researchers noticed something a little off about the frogs. Small leaf litter frogs were arching their backs, throwing their heads back and opening their mouths wide. All of which suggests that they were letting out some sort of scream or howl but the scientists actually [...]

The idea that the universe is expanding dates from almost a century ago. It was first put forward by Belgian cosmologist Georges Lemaître (1894–1966) in 1927 and confirmed observationally by American astronomer Edwin Hubble (1889-1953) two years later. Hubble observed that the redshift in the electromagnetic spectrum of the light received from celestial objects was directly proportional to their distance from Earth, which meant that bodies farther away from Earth were moving away [...]

The Brazilian Atlantic Rainforest is full of the shrill ‘screams’ of a little amphibian in distress, however previously, we human beings have actually ignored their sobs. For the very first time, scientists have actually tape-recorded South American frogs sobbing out at a regularity that entirely bypasses the human ear – however which would certainly be fairly undesirable to pets with the ideal type of receivers. The ground cover frog (Haddadus binotatus) is the most [...]

In addition to already known pollutants, the Bay of Santos—a city in the state of São Paulo (Brazil) that is home to the largest seaport in Latin America—has been affected by an emerging contaminant that is now present not only in the water but also in sediments and marine organisms throughout the São Paulo coastal region: cocaine. The drug causes serious toxicological effects in animals such as brown mussels (Perna perna), mangrove oysters (Crassotrea gasar) and [...]

The technology used to sequence SARS-CoV-2 at record speed early in the COVID-19 pandemic has been successfully tested as a technique to monitor arboviruses and diseases transmitted mainly by mosquitoes. In an article published in the journal Microbial Genomics, researchers affiliated with Pasteur Institute in São Paulo, Brazil, and the University of São Paulo (USP), in collaboration with colleagues at the University of Birmingham in the United Kingdom, describe [...]