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Phys.Org (Reino Unido)
Em 2021: 13 notícias
Desde 1995: 283 notícias
Model describes interactions between light and mechanical vibration in microcavities
Publicado em 02 março 2021
Optomechanical microcavities are extremely small structures with diameters of less than 10 micrometers (about a tenth of a human hair) inside which light and mechanical vibrations are confined. Thanks to their small size and to efficient microfabrication techniques that enable them to hold intense light energy and interact with mechanical waves, microcavities can be used as mass and acceleration sensors and in Raman scattering (a spectroscopy technique deployed to analyze materials, including [...]
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Behavior of wild capuchin monkeys can be identified by marks left on their tools
Publicado em 01 março 2021A group of researchers including Tiago Falótico, a Brazilian primatologist at the University of São Paulo's School of Arts, Sciences and Humanities (EACH-USP), archeologists at Spain's Catalan Institute of Human Paleoecology and Social Evolution (IPHES) and University College London in the UK, and an anthropologist at the Max Planck Institute for Evolutionary Anthropology in Germany, have published an article in the Journal of Archeological Science: Reports describing an [...]ver notícia -
A research group proposes six guidelines for managing the impacts of invasive species
Publicado em 01 março 2021Invasive alien species, defined as animals and plants that breed and disperse in a landscape beyond their native range, have negative environmental, social, and economic impacts. One example among many is the forage grass genus Brachiaria, originally African and introduced to Brazil to form cattle pasture. It has become a major threat to the survival of native species and biodiversity at several spatial scales. Complete eradication of invasive species is often impracticable. Attempts [...]ver notícia -
Over 80% of Atlantic Rainforest remnants have been impacted by human activity
Publicado em 24 fevereiro 2021A Brazilian study published in Nature Communications shows that human activities have directly or indirectly caused biodiversity and biomass losses in over 80% of the remaining Atlantic Rainforest fragments. According to the authors, in terms of carbon storage, the biomass erosion corresponds to the destruction of 70,000 square kilometers (km²) of forest—almost 10 million soccer pitches—or USD 2.3 billion-USD 2.6 billion in carbon credits. "These figures [...]ver notícia -
South American lizard’s blood pressure mechanism is more efficient at cool temperatures
Publicado em 18 fevereiro 2021The mechanism that keeps arterial blood pressure stable in black and white tegu lizards (Salvator merianae) even as their body temperature varies substantially is more efficient at lower than higher external temperatures, contrary to what has always been believed, and vascular regulation plays a key role in pressure adjustments, according to an article published in PLOS ONE by researchers at the Federal University of São Carlos (UFSCar) in the state of São Paulo, Brazil. The [...]ver notícia -
Application of potassium to grass used as cover crop guarantees higher-quality cotton
Publicado em 16 fevereiro 2021The use of cover crops between cotton harvests protects the soil, conserves water, and reduces the risk of erosion. Researchers at the University of Western São Paulo (UNOESTE) and São Paulo State University (UNESP) in Brazil found that application of potassium (K) to a grass cover crop grown before cotton in sandy soil lowered production cost and resulted in cotton with a higher market value. "The dynamics of early application of potassium to grass planted as [...]ver notícia -
Scientists create flexible biocompatible cilia that can be controlled by a magnet
Publicado em 09 fevereiro 2021Researchers at the University of Campinas's Chemistry Institute (IQ-UNICAMP) in the state of São Paulo, Brazil, have developed a template-free technique to fabricate cilia of different sizes that mimic biological functions and have multiple applications, from directing fluids in microchannels to loading material into a cell, for example. The highly flexible cilia are based on polymer-coated iron oxide nanoparticles, and their motion can be controlled by a magnet. In nature, [...]ver notícia -
Researchers create plastic film that suppresses the coronavirus
Publicado em 08 fevereiro 2021A consortium comprised by companies Braskem, AplFilm and Nanox and the UFSCar (Brazil) and Jaume I of Castellón (Spain) universities have released a plastic film capable of deactivating 99.99% of the new coronavirus in 15 minutes. The new product called AlpFilm Protect PVC is already available on the market. The scientific collaboration initiated 15 years ago between the UFSCar and UJI with company Nanox had already developed in 2014 a product with antifungal and bactericidal [...]ver notícia -
Startup develops yeast-based COVID-19 diagnostic test
Publicado em 29 janeiro 2021Incubated at the University of Campinas (UNICAMP) in the state of São Paulo, Brazil, and supported by São Paulo Research Foundation- FAPESP's Innovative Research in Small Business Program (PIPE), BIOinFOOD is a startup that is developing a rapid COVID-19 diagnostic test based on a patent application filed by students at UNICAMP's Genomics and Bioenergy Laboratory. The test is based on a biosensor consisting of a genetically modified [...]ver notícia -
Large mammals make soil more fertile in tropical forests
Publicado em 15 janeiro 2021The White-lipped peccary (Tayassu pecari) is a boar-like hoofed mammal found throughout Central and South America. These animals roam the forest in bands of 50 to 100 individuals, eating a wide variety of foods. In Brazil's Atlantic Rainforest, they prefer the fruit of the jussara palm Euterpe edulis. The jussara is very abundant in this biome, probably thanks to vast amounts of dung, urine, and soil trampling by peccaries as well as tapirs (Tapirus terrestris) and other fruit-eating [...]ver notícia