Issue # 260 _ October 2017

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Cover

Back to the laboratory bench
Stem cell therapy for heart problems, which has been tested in humans since the 2000s, has not shown conclusive results and is undergoing new tests in vitro and in animal models By

S&T Policy

EDUCATION

Advances in graduate studies

Quadrennial CAPES evaluation shows increasing number and quality of courses, and fails 3% of programs

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INNOVATION

Shared risk

Model adopted by Embrapii offers companies funding and cooperation with research groups

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Public Policy 

Heralds of change

Study addresses the role of individuals who help mobilize society and catalyze transformation

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Science

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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EMBRYOLOGY

Silencing in order to survive

One of the copies of the X chromosome is inactivated in females during the early days of embryonic development

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PALEOBIOLOGY

More than met the eye

Fossilized burrows suggest complex organisms arose before the Cambrian explosion of diversity

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paleontology

Fossils on the move

3D reconstructions highlight new characteristics of crocodiles and dinosaurs that lived millions of years ago in Brazil

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PHYSICS

The origin of cosmic rays

Study indicates with greater precision that these ultra-high-energy particles come from outside the Milky Way

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Astrophysics

Worlds like ours

A new generation of spectrographs should permit the discovery of planets that are Earth twins

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astrophysics

The rocks that remained

An alternative model suggests the asteroid belt originated in leftovers from the formation of the planets in the solar system

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Technology

ENERGY

More efficient light

Perovskite solar cells may be a cheaper and more effective alternative to the silicon solar panels that dominate the world’s solar panel market.

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ROAD ECOLOGY 

Animals on the highway

New technologies to prevent animals being hit and reduce highway accidents are created in Brazil

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Chemistry

Green reactions

Products incorporating renewable feedstocks are gradually replacing petroleum-based products

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Agriculture

Less water for rice

Agronomist develops new rice cultivation method

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Humanities

LITERATURE

Lima Barreto as a chronicler of post-Abolition Brazil

An anthropologist’s biography of the Brazilian writer marks the genre’s resurgence in academia

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MUSEOLOGY

The uncertain fate of police museum collections

Researchers defend the preservation of collections, while social movements and relatives demand the removal of objects and bodily remains

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