Chemistry

Public Health

Deaths linked to e-cigarettes

As of September 27, at least 12 deaths caused by lung problems in the USA have been attributed to the use of electronic cigarettes

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Physico-chemistry

The hidden strokes of Portinari

Tests show how the artist produced his artwork and may be useful in confirming the author of a piece found in the painter’s former home

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Pharmacology

Material releases drug at regular intervals

An international group of researchers has developed a nanostructured material capable of releasing drugs in low concentrations at regular intervals

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Genetics

The glowing mosquito from Vale do Ribeira

It may be possible to genetically engineer the larvae of disease-causing mosquitoes such as Aedes aegypti to make them glow

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Geology

Diamonds as old as the Earth

Mined in the municipality of Juína, Mato Grosso State, the diamonds were formed 410–660 kilometers deep inside the Earth

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Profile

Pure air

Chemical engineer creates air purifier startup based on prototype developed during PhD research

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Cover

The threat of microplastics

Tiny plastic fragments are everywhere and removing them poses a major challenge

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PHOTOLAB

The aesthetics of imperfection

A large electric voltage bias is used to spin ultrafine nanometric fibers into membranes that can filter water

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New materials

New energy applications for gold and platinum

Platinum-coated gold nanoparticles could enhance the efficiency of fuel-cell catalysts

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Biology

The changing venom of a stingray

Stingray venom changes as the fish mature

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Photolab

Niobium in bloom

"Flowers" bloom inside a device that works like a pressure cooker at a University of São Paulo Chemistry Institute laboratory

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Oceanography

Sources of methane

Two thousand craters releasing the greenhouse gas found off the Brazilian coast

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Corporate research

Natural flavor

Duas Rodas, in southern Brazil, is investing to develop food ingredients that are responsive to emerging consumer demands

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INTERVIEW

Jairton Dupont: The radical chemist

The specialist in ionic liquids defends a more open, pluralistic, and democratic university

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PHOTOLAB

Medicinal necklaces

Crnkovic studied microalgae in fresh water as part of her PhD research, which involved bioprospecting for compounds that could help fight cancer

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Mining

The niobium controversy

Niobium, of which Brazil is by far the world’s largest producer, is surrounded by myths and misconceptions

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Physical chemistry 

The periodic table at a crossroads

After 150 years, the diagram that arranges the chemical elements based on their similar properties faces difficulties for further growth

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Physico-chemistry

Hidden strokes of Portinari

Tests show how the artist produced his artwork and may be useful in confirming the painter of a piece found in his former home

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INTERVIEW

Glaucius Oliva: Complex structures

Self-declared molecule tamer, physicist marries scientific research with administrative management

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Meteorology

From the earth to the sky

Researchers to use German aircraft to investigate how nanoparticles produce storms in the Amazon

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Biochemistry

Green, yellow, or red

Bioluminescence research sheds new light on the mechanisms behind firefly colors

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Nobel Prize 2018 | Chemistry

Directed protein evolution

The Nobel Prize in Chemistry was shared by three researchers who controlled genetic changes and selective processes in a laboratory

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Environment

Mangroves store more carbon than the rainforest

In the Amazon, every hectare of mangrove contains twice as much carbon as the same area of inland forest

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ENVIRONMENT

Contamination beyond the mines

Areas of the Amazon flooded by dams may lead to an increase of the mercury levels in fish consumed by local residents

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Biology

The chemical language of insects

Within colonies, bees and ants recognize each other and organize themselves through compounds that cover their bodies

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Video

Analyses show how Portinari produced his work

The findings can help confirm authorship of a painting found in what used to be his home and now is the Portinari House Museum

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COVER

Options on the table

Agriculture 4.0 can help to reduce pesticide use on farms in Brazil

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OCEANOGRAPHY

Sources of methane under the sea

Two thousand craters releasing greenhouse gas found off the Brazilian coast

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COVER

Pesticides in the balance

Debate stirs over proposed regulations on pesticides—the mainstay of large-scale farming but a hazard to the environment and the health of rural communities

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ASTROPHYSICS

A meteorite in Serra Pelada

Fragments of one of the largest asteroids in the solar system recovered by researchers in Amazonia

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