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Space age for metals, foams and the living
by Staff Writers
Paris (ESA) May 08, 2020

A sample cell unit of the Foam Coarsening experiment on the International Space Station. By shaking the pistons inside the cell, foam is generated. Additional information here

Astronauts donned gloves on the International Space Station to kick off two European experiments on metals and foams, while preparing spacesuits for future work outside their home in space.

The new crew, NASA's Chris Cassidy and Roscosmos' Anatoly Ivanishin and Ivan Vagner, has completed three full weeks of their 195-day mission. They have more space for themselves than the typical crew of six, but not much time to spare.

New metallurgy
Most metals used today are mixtures - alloys - of different metals, combining properties to make new materials. Alloys are everywhere now, from your smartphone to aircraft.

Scientists want to improve their understanding of melting-solidification processes in alloys, and they are taking organic compounds to the Space Station as analogues to experiment with. Microgravity allowed the Transparent Alloys experiment to observe their formation unaffected by convection at microscopic resolution.

Before the new crew arrived, former inhabitant Andrew Morgan handled the samples using the European Microgravity Science Glovebox, a device that allows them to carry out experiments in a sealed and controlled environment, isolated from the rest of the International Space Station.

Foams in orbit
The behaviour of foams was also in the spotlight. The Foam-Coarsening experiment started the science campaign to better understand how bubbles evolve in microgravity. In space, foams are quite stable because there is no drainage in weightlessness. This allows scientists to study the slower phenomena of a bubble becoming bigger and bursting.

Three sample cells filled with liquid were stored inside the Fluid Science Laboratory in the European Columbus module. After some shaking by pistons inside the cells, laser optics and high-resolution cameras could record the birth evolution of the foam.

The results from this research will not just apply to the foam in your morning cappuccino. Foams are used in a wide range of areas from food to cleaning and sealing products, and even construction.

Bones and muscles
On average astronauts in space lose 1% bone density a month due to living in weightlessness. Studying what happens during long stays in space offers a good insight into osteoporosis.

Cosmonauts Anatoly Ivanishin and Ivan Vagner ran their first sessions of European experiment EDOS-2 to help scientists understand the effects of spaceflight on bone, and how it recovers after returning to Earth.

A better understanding of bone loss and its recovery is crucial not only for astronauts, but also for patients suffering from bone diseases or fractures during ageing and immobilisation on our planet.

NASA astronaut Chris Cassidy performed his first in-space session of the Myotones experiment that monitors his muscle tone, stiffness and elasticity. A non-invasive device measured his back, shoulders, arms and legs - areas known to be affected by atrophy during extended inactivity periods.

Results will be compared with measurements before and after his spaceflight. Chris is one 12 astronauts to take part in this experiment that could improve the lives of many people affected by strained muscles with new strategies for rehabilitation treatments.

Related Links
Human and Robotic Exploration at ESA
Space Technology News - Applications and Research

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Sustainable structural material for plastic substitute
Beijing, China (SPX) May 04, 2020
Plastic is a kind of widely used artificial material. The invention of plastic gives us a lightweight, strong and inexpensive material to use but also bring us the plastic apocalypse. Many of the unrecycled plastic waste ends up in the ocean, Earth's last sink. Broken by waves, sunlight and marine animal, a single plastic bag can be broken down into 1.75 million microscopic fragments, which is called microplastics. Those microplastics might finally end up in our blood and system through the fish w ... read more

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