Science

COVID-19

Setbacks in coronavirus drug development

Health agencies are suspending the use of drugs that have lost efficacy against circulating variants of SARS-CoV-2

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ZOOLOGY

Zoonomia project compares genomes in search of answers about evolution and health

Analysis of an unprecedented volume of data could provide insights into human diseases

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ASTROPHYSICS

Dense, compact star could be made of strange matter

With 80% of the mass of the Sun and a radius of 10.4 kilometers, the object could be made up of free quarks

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Mathematics

Algorithm reduces uncertainty in proposition that has challenged mathematicians for nearly 100 years

The work is considered a major breakthrough in the search for a solution to Ramsey's theorem, formulated in 1930

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OCEANOGRAPHY

Pollution, loss of biodiversity, invasive species, and the impacts of climate change

The marine and coastal environment in Brazil is undergoing intense degradation, demanding urgent action to alleviate problems that are piling up

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Photonics

Researchers create capsule to protect ultra-thin optical fibers

Device is designed for several types of sensors, such as those used to detect gas leaks

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ANIMAL TESTING

Regulation establishes guidelines on the use of animals in research and teaching in Brazil

At 1100 pages long, the new manual took a decade to produce

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ECOLOGY

Freshwater mangroves

A study explores this rare type of coastal ecosystem located at the mouth of the Amazon River

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BIODIVERSITY

Preserving the harvest

Brazil contributed with five samples of sweet potato, four of rice, two of potato, and two of millet

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ASTROPHYSICS

Super telescope gets a funding boost

Giant Magellan Telescope to receive US$205 million in fresh investment, including US$5 million from FAPESP

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ECOLOGY

How many cubs does a jaguar have?

Scientists use technology to measure the birth rate of jaguars in the Pantanal

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cover

Amount considered as moderate alcohol consumption drops worldwide

Rise in cancer and other diseases associated with drinking small amounts of alcohol challenges the notion of moderate consumption

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cover

Alcohol has accompanied humanity since the emergence of cities and the adoption of agriculture

Some 10,000 years ago, the Chinese made a fermented drink from a mixture of rice, honey, and fruit

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Environment

Urban planning failures, heavy rainfall, and fragile soil aggravate gullies nationwide

Researchers have warned for years that without adequate soil drainage and occupation, chasms like those in Buriticupu, Maranhão, would grow

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Immunology

Antibodies defeat yellow fever in animals

Rodents and monkeys given an infusion of the compounds were able to survive infection

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Microbiology

Viruses that infect insects increase the ability of Aedes aegypti to transmit diseases to humans

Mosquitoes infected with both PCLV and HTV are three times more likely to carry the dengue virus

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COVID-19

Thai version of vaccine similar to ButanVac induces good immune response

In phase 1 trials involving 210 people, the low-cost formulation produced more neutralizing antibodies than the Pfizer / BioNTech vaccine

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NEUROSCIENCE

Learning to tell time

Neurons from one region of the brain train those from another to count the ticking of seconds

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Public health

One in seven 40-year-old Brazilian women has intentionally terminated at least one pregnancy

Half of them had abortions between the ages of 12 and 19

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Genetics

Natural defense against Chagas

Genetic alteration capable of protecting people from the disease spread among native peoples of the Amazon 7,500 years ago

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Oncology

Vaccine candidate designed to treat cancer caused by HPV

In experiments on rodents, vaccine formulations eliminated tumors and rid the animals of the disease for a long time

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Health

LGBT+ people take fewer preventive exams than heterosexual cisgender individuals

Study looked at data from 6,693 Brazilians aged 50 or over from all macro-regions of the country

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Physics

Method determines whether two particles of light are entangled based on measurements of only one of them

The approach was conceived by a Brazilian scientist working with the winner of the 2022 Nobel Prize in Physics

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Climate

Extreme rainfall with the potential to cause disasters is increasingly common in parts of Brazil

Number of days with extreme rainfall in São Paulo and other state capitals has increased since the 1990s

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Astrophysics

Brazilian astronomers find “misplaced” ring around an object distant from the Solar System

A distant circular structure is found revolving Quaoar, an icy body located in the Kuiper belt

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Nutrition

The burden of ultra-processed foods

New research links consumption of ultra-processed foods to 10% of premature deaths in Brazil and accelerated cognitive decline

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Epidemiology

Mpox in children may signal infection risk in other population groups

One in every four people infected by Mpox in Sergipe is under 18 years of age

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Neurosciences

Brazilian and French researchers identify a new possible biological cause for depression

Failure to recycle neuron components leads to signs of the disease in mice similar to those seen in humans

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Archaeology

Pre-historic site may harbor the first araucaria pine record in rock art

Cave painting at a prehistoric site in the interior of Paraná would be the first record of the species in rock art

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Ecology

The reason behind the megadiversity of fish in South America

Geological events of the last 55 million years have restructured hydrographic basins and contributed to the diversification of freshwater species

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