Two thousand years ago, Roman glass blowers used gold nanocrystals to create vases with brilliant colours ranging from red to purple. Today, gold nanocrystals are being used as catalysts in chemical reactions and may even become high-density data storage devices.
Gold nanocrystals aren’t gold in colour. They change colour as their size and shape change.
Australia’s iconic kangaroo may hold the secret for the war on cancer. Assoc. Prof. Ming Wei from the Griffith Institute of Health and Medical Research is using commensal bacteria found in kangaroos to develop anti-cancer agents that are expected to be effective in combating solid tumours, which account for up to 90 per cent of cancers.
The Walter & Eliza Hall Institute of Medical Research, Melbourne
Marnie Blewitt wants to know how a human being is made: how does a single fertilised egg develop into an adult with millions of cells performing a myriad of different functions. It’s the hottest issue in genetics, and one that’s close to her right now as she is expecting her first child soon.
Zenobia Jacobs wants to know where we came from, and how we got here. When did our distant ancestors leave Africa and spread across the world? Why? And when was Australia first settled?
These are difficult and controversial questions. But Zenobia has a deep understanding of time and how to measure it. She has developed a way of accurately dating when individual grains of sand were buried with human artefacts. And that technique is transforming our understanding of human evolution.
University of Queensland / University of Copenhagen
In 1998 astronomers made an astonishing discovery-the expansion of the Universe is not happening at a steady rate, nor is it slowing down toward eventual collapse. Instead, it is accelerating. The discovery required a complete rethink of the standard model used to explain how the Universe works.
“Now we know that stars, planets, galaxies and all that we can see make up just four per cent of the Universe,” says Tamara Davis, a University of Queensland astrophysicist.
“About 23 per cent is dark matter. The balance is thought to be dark energy, which we know very little about.”
Why are some plant seeds very small and others large? Angela Moles tackled this simple question by compiling information on 12,669 plant species. She discovered that plant seeds in the tropics are, on average, 300 times bigger than seeds in colder places like the northern coniferous forests. She then used these data to follow the evolutionary history of seed size over hundreds of millions of years.
The study was the first of its kind and the results, published in Science and PNAS, have revolutionised our understanding of the factors that determine the size of offspring in plants and animals. Angela is a leader in developing a new approach to ecology—one that could allow us to accurately model and predict the impact of climate change on ecosystems. Continue reading Big ecology: From tundra to savanna→
After two decades of research the first wave of nanotechnology consumer products are entering the marketplace in applications as diverse as catalysts, surface treatments for glass, cosmetics and drug delivery. But the properties that make them attractive to industry may also have unforeseen consequences. That worries Amanda Barnard, a physicist at The University of Melbourne.
“Many materials that are normally inactive—gold and silver, for example—become biologically active when the particles are just a few nanometres in size. So, if we are creating these new particles we need to understand how they will behave in the environment.”
Amanda believes she can create a theoretical framework that will allow the risk of nanoparticles to be determined in the computer—before the particle has even been made. She will use her L’Oréal Australia For Women in Science Fellowship to develop new computational tools to predict the behaviour of nanoparticles in the environment. Continue reading Are nanoparticles safe?→
As a child, Natalie Borg tried to grow crystals. Two decades on, she is still growing crystals. But now she is analysing them with synchrotron light, to figure out how our bodies mount a rapid defence when we are attacked by viruses.
“The immune system is complex and is made up of many specialised types of cells and proteins. The key is to understand their function,” Natalie says.
To date, she’s been working as part of a successful team at Monash University. In 2007 her work on how our natural killer T cells recognise fats from invaders was published in Nature.
Now she’s setting up her own laboratory at Monash—a bold move but essential if her career is to grow. With the help of her L’Oréal Australia For Women in Science Fellowship, she will study key steps in our body’s early warning system against viral attack.