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ScienceDaily (EUA)
Em 2026: 31 notícias
Desde 1995: 245 notícias
Artificial magnetic field produces exotic behavior in graphene sheets
Publicado em 29 de novembro de 2018
A simple sheet of graphene has noteworthy properties due to a quantum phenomenon in its electron structure named Dirac cones in honor of British theoretical physicist Paul Dirac (1902-1984), who was awarded the Nobel Prize for Physics in 1933.
The system becomes even more interesting if it comprises two superimposed graphene sheets, and one is very slightly turned in its own plane so that the holes in the two carbon lattices no longer completely coincide.
For specific angles of twist, the [...]
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Ointment to counter the effects of brown recluse spider bites is tested on humans
Publicado em 28 novembro 2018Fundação de Amparo à Pesquisa do Estado de São Paulo Summary: Brazil reports more than 7,000 cases a year of poisoning as a result of the bite of the brown recluse spider; there are also reports of occurrences in North America and Europe. Share: FULL STORY The bite from a brown recluse spider (Loxosceles) can cause skin necrosis, renal failure, and even death. A new ointment is being tested in Brazil, however. Its effects have already been proven in tests conducted in cell cultures and [...]ver notícia -
Understanding the dynamics of dune formation
Publicado em 26 novembro 2018Crescent-shaped dunes called barchans are structures that appear in a wide variety of environments, including beaches and deserts, riverbeds and the seafloor, inside water pipes and oil pipelines, and on the surface of Mars and other sandy planets with an atmosphere. advertisement Despite differences in scale varying from ten-centimeter ripples for underwater dunes to kilometer-high mountains for Martian dunes, the dynamics of barchan formation and motion appear to be highly similar [...]ver notícia -
Salmonella found to be resistant to different classes of antibiotics
Publicado em 09 novembro 2018Brazil's Ministry of Health received reports of 11,524 outbreaks of foodborne diseases between 2000 and 2015, with 219,909 individuals falling sick and 167 dying from the diseases in question. Bacteria caused most outbreaks of such illnesses, including diarrhea and gastroenteritis. The most frequent were Salmonella spp., with 31,700 cases diagnosed in the period (14.4% of the total), Staphylococcus aureus (7.4%), and Escherichia coli (6.1%). According to a survey by the Ministry of Social [...]ver notícia -
The new face of South American people
Publicado em 09 novembro 2018Date: Fundação de Amparo à Pesquisa do Estado de São Paulo Summary: Study by 72 researchers from eight countries concludes that the Lagoa Santa people are descendants of Clovis culture migrants from North America. Distinctly African features attributed to Luzia were wrong. FULL STORY Study by 72 researchers from eight countries concludes that the Lagoa Santa people are descendants of Clovis culture migrants from North America. Distinctly African features attributed to Luzia were [...]ver notícia -
Bioluminescent substance discovered in Brazilian cave worm larva
Publicado em 01 novembro 2018Date: November 1, 2018 Source: Fundação de Amparo à Pesquisa do Estado de São Paulo Summary: Identification of the first luciferin-producing insect belonging to the order Diptera in the Neotropics paves the way for researchers to investigate other biochemical functions of the molecule in these organisms. An insect larva found in the caves of Intervales State Park, an Atlantic Rainforest remnant in the municipality of Ribeirão Grande, São Paulo State, Brazil, was initially of no [...]ver notícia -
Zika circulates among wild animals in the Americas, making eradication nearly impossible
Publicado em 01 novembro 2018Date:November 1, 2018 Source:University of Texas Medical Branch at Galveston Summary: Researchers report that wild monkeys in the Americas are transmitting the Zika virus to humans via mosquitoes, making complete eradication of the virus in the Americas very unlikely. A collaborative group of researchers from The University of Texas Medical Branch at Galveston and the Faculty of Medicine of Sao Jose do Rio in Brazil is the first to report that wild monkeys in the Americas are transmitting [...]ver notícia -
Discovery of Zika virus in monkeys suggests disease may also have wild cycle
Publicado em 30 outubro 2018Date: October 30, 2018 Source: Fundação de Amparo à Pesquisa do Estado de São Paulo Summary: Zika virus has been detected in dead monkeys found in several areas in Brazil. The monkeys had been killed by locals who thought the animals had yellow fever. In fact, the monkeys were not bearers of that disease, but infection by Zika virus had made them sick and more vulnerable to attack by humans. Zika virus has been detected in dead monkeys found in Brazil near São José do Rio Preto, São [...]ver notícia -
Cappuccino made with jackfruit seed flour has chocolate aroma
Publicado em 26 outubro 2018Date: October 26, 2018 Source: Fundação de Amparo à Pesquisa do Estado de São Paulo Summary: A study conducted in Brazil shows that flour made from roasted jackfruit seeds can replace cocoa powder in a mixture of milk and coffee used to make cappuccino. Cappuccino made with jackfruit instead of cocoa powder. According to a new study, roasted jackfruit seeds can replace between 50% and 75% of the cocoa that is blended with milk and coffee to make cappuccino without impairing flavor or [...]ver notícia -
Colored filter improves dyslexic children's reading speed
Publicado em 18 outubro 2018Date: October 18, 2018 Source: Fundação de Amparo à Pesquisa do Estado de São Paulo Summary: Volunteers aged 9-10 with dyslexia took less time to read passages from children's books, possibly thanks to attenuated excitability of the cerebral cortex. Reading, one of the most difficult activities for children with dyslexia, can be improved by the use of green filters. A study described in an article by Brazilian and French researchers reports increased reading speed for nine- and [...]ver notícia