Guia Covid-19

Chemistry

Materials engineering

The power of copper

Copper nanoparticles can be used to create biocidal fabrics and agricultural pesticides

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Nobel Prize

Everything as before

The Royal Swedish Academy of Sciences decided not to award this year’s Nobel Prize to the development of mRNA-based vaccines

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Chemistry

The Lavoisiers, transformed

Researchers discovered important differences in the original composition of the iconic portrait of Antoine Lavoisier and his wife

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Chemistry

A 100-year-old Brazilian patent

A century ago, chemist and photographer Ubaldo Conrado Augusto Wessel (1891–1993) patented a new formula in the country for bathing photographic papere

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Environment

CO2 extraction plant

The largest plant designed to remove carbon dioxide from the atmosphere began operating in Ireland on September 8

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Retrospect

Perfecting the art of cachaça making

How a self-taught chemist helped to improve cachaça production techniques in the late eighteenth century

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Obituary

Solid knowledge

Oswaldo Luiz Alves helped advance inorganic chemistry and nanotechnology in Brazil

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Pharmacology

New Alzheimer’s drug sparks controversy

A new compound designed to fight Alzheimer's disease is causing controversy

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Agriculture

New biological pest control agents

Natural tick control and lacewings could help fight pests in Brazil’s cattle and coffee industries

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Medicine

Breathing microplastics

Tiny and potentially harmful polymer particles and fibers found in human lungs

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Materials engineering

Made to order

Artificial intelligence system determines glass formulation based on the desired characteristics

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nuclear tests

France underestimated how many were affected by nuclear testing

The inhabitants of the archipelagos of French Polynesia were exposed to 2–20 times more radiation than previously estimated

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Photolab

Bottled color

Under a blacklight, the lab-made solution shines

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Ecology

Lowered immunity

Even modest doses of insecticide make bees more susceptible to bacterial infections and increased mortality

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Crop science

Soil genetics

New mineral mapping technique can help farmers save on farm inputs and minimize environmental impacts

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Astrophysics

Persistent connection

International team captures unexpected simultaneous creation of star and planet in system continuously sustained by cloud of gas

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Geophysics

Hidden light

Brazilian group identifies rare light in the upper atmosphere over northeastern Brazil, created by the Moon passing in front of the Sun

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Chemistry

Signs of life on Venus fade

Venus was the center of attention in September when Jane Greaves of Cardiff University, UK, and her colleagues published a paper in Nature Astronomy on the high concentrations of phosphine gas (PH3) detected in the planet’s atmosphere

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Careers

Quantum biology

Emerging field demands interdisciplinary collaboration and knowledge of both chemistry and physics

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Geology

Gas from an ancient sea

Methane released by a saline lake may have caused a rise in temperature leading to the diversification of life forms on the planet

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COVID-19

Monitoring the evolution of COVID-19

Blood levels of a particular protein can indicate the severity of coronavirus infections and guide the response of the attending health care team

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Geology

Water on the near side of the moon

There is water on the Moon, and not only in the dark craters located near its poles

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Memory

The chemist of evolution

Otto Gottlieb associated the structural complexity of substances with the development plants and their environment

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Energy

Electric cars, the economy, and health

Replacing 25% of American cars with electric vehicles would save the country US$17 billion per year

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Chemistry

Impurities in psychedelics

Researchers analyzed drugs seized in Santa Catarina between 2011 and 2017 and found a change in the composition of blotters

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Photolab

Fluorescence in motion

When added to viscous alcohol using a pipette, aminoquinoline slowly rises due to differences in density between the two substances, and as they mix, a fluorescent glow is emitted, visible in black light

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Public health

Lead in the Paris air

A ton of lead may have been deposited over a 1 kilometer radius around Notre-Dame Cathedral in Paris as a result of the April 2019 fire

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Biochemistry

Venomous amphibians

Caecilians are venomous animals, capable of injecting venom into their prey, say researchers from the Butantan Institute

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COVID-19

A SARS-CoV-2-proof fabric

Researchers from São Paulo–based company Nanox have developed a fabric containing silver nanoparticles that can inactivate the novel coronavirus, SARS-CoV-2

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Innovation

From cocoons to bones

A team has developed a potentially simpler, faster, and cheaper strategy for producing a biocompatible material that can be used as a scaffold for repairing long bones

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