New lubricants containing star-shaped polymers have hit the market, thanks to Australian polymer technology. Lubrizol Corporation has launched the first commercial products developed using CSIRO’s Reversible Addition Fragmentation chain Transfer (RAFT) polymer synthesis process.
CSIRO chemist Dr Ezio Rizzardo says the RAFT process allows much greater flexibility and potential for polymer synthesis, compared with conventional methods. “Conventional polymerisation is a relatively simple process with two ingredients: large amounts of monomer and a small amount of an initiating agent. You apply heat; a chain reaction starts and runs to completion, making polymer chains that can have widely varying lengths.” Continue reading Star-shaped polymers boost engine performance→
Queensland scientists are helping radiologists to spot the more subtle signs of breast cancer, using computer tools and magnetic resonance imaging (MRI).
Currently MRI allows radiologists to detect lumps or other growths by creating a 3D anatomical image of the breast.
Prof Stuart Crozier and his team at the University of Queensland have developed a computer tool that improves MRI detection by spotting more subtle indicators of cancer.
“When cancers are just starting to form, they form abnormal blood vessels very early, to feed their rapid cell division,” Stuart says.
“By seeing how certain contrast agents move through the tissue, we can pick up the formation of these blood vessels.”
This works towards solving two issues with conventional MRIs.
First, it should reduce the number of false positive results and therefore the number of women put through biopsies of benign tumours.
Second, this should catch tumours earlier, not just when tumours are big enough to discern visually.
“The goal is to assist radiologists to identify areas of cancer risk that may not be obvious on conventional images,” Stuart says.
Stuart, a Fellow of the Australian Academy for Technological Sciences and Engineering (ATSE), was recently presented with a 2012 Clunies Ross Award for his contributions to the engineering of magnetic resonance imaging (MRI) technology.
The research, funded as an Australian Research Council’s Discovery Project, is now undergoing trials with 140 women at private radiology firm Queensland X-ray.
Photo: Contrast-enhanced MRI of a breast.
Credit: Yaniv Gal
Photo: Research Assistant Michael Wildermoth works with the software that shows how certain contrast agents move through breast tissue.
Credit: Kim Nunes