Australasian Science Magazine

By AusSMC (ed.)

A study published in Injury Prevention suggests a link between high fizzy soft drink consumption and violence among teenagers, but how strong is the evidence?

“These findings probably tell us more about the people who drink large volumes of soft drink rather than necessarily suggesting a causal link between soft drink and anti-social behaviour. The study really cries out for more research to understand why heavy use of soft drink may be an indicator of poor behaviour and what are the social conditions that lead to such heavy use. Such a study would also need to look at the impact of alcohol, caffeinated drinks and illicit drugs, which we do know have both an indicator and a causal link.”

By Martin Pera and Debra Yin Foo

The European Court of Justice has ruled that research involving the removal of a stem cell from a human embryo at the blastocyst stage – and therefore entailing the destruction of that embryo – cannot be patented. The ruling removes a key commercial incentive for biotechnology and pharmaceutical companies to back stem-cell research in Europe.

"The decision by the European Union Court of Justice will slow or halt the translation of advances in stem cell research into treatments for patients.

“Though the ruling does not affect Australia directly, we have to recognise that progress in this field depends on international collaboration, particularly in clinical trials. European stem cell scientists are leaders in the field, and everyone will suffer if there are barriers to such collaboration.

By Trevor Island

Last year the Hayabusa capsule landed in South Australia with a sample of dust collected from the Itokawa asteroid. The dust has now been analysed and the results of the preliminary investigation published in Science. Here the only Australian involved in the research outlines its significance.

“The Hayabusa mission has provided us with samples of a pristine asteroid – and what a message it contains.

“We can now unequivocally link the asteroids we see in space with meteorites that we collect on land. There have been problems relating the nature of asteroids with meteorites because meteorites are ablated as they come in through the atmosphere. The samples from Itokawa are the previously unknown ‘skin’ of an asteroid.

By Dr Anu Anuradha and Prof Jo Salmon

A study of children in Sydney suggests that retinal blood vessel narrowing increases with sedentary activity. Children who engaged in more physical activities, such as rugby or cricket, had wider retinal arterioles. The magnitude of vessel narrowing for each hour per day of sedentary behaviour was similar to a 10 mm of mercury rise in systolic blood pressure. Experts independent of the study respond to the research and what it means for children’s health.

“This research conducted in 6-year old children in Sydney, Australia has shown that physical activity is beneficially associated with wider arterioles in the retina of the eye, while greater TV time is adversely associated with narrower arterioles. The eye is a unique site where the small blood vessels of the retina can be seen with the naked eye and photographed. These micro vessels represent those in the rest of the body. As a general rule, narrower arterioles and wider venules are adverse signs when one is examining the small blood vessels of the retina.