Neuroscience

New imaging method illuminates oxygen's journey in the brain

The human brain consumes vast amounts of energy, which is almost exclusively generated from a form of metabolism that requires oxygen. While the efficient and timely delivery of oxygen is known to be critical to healthy brain ...

Health

Why does alcohol make my poo go weird?

As we enter the festive season it's a good time to think about what all those celebratory alcoholic drinks can do to your gut.

Psychology & Psychiatry

Excessive fluid consumption: Habit or hormonal disorder?

People who drink more than three liters of fluid a day may be suffering from a rare hormone deficiency. For many, however, it is just a harmless habit. Failing to differentiate the two correctly can be fatal, so researchers ...

Health

Should I be getting my vitamin D levels checked?

Australia has seen a surge in vitamin D testing of children, with similar trends reported for adults around the world. GPs are now being urged not to test for vitamin D unnecessarily.

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Concentration

In chemistry, concentration is defined as the abundance of a constituent divided by the total volume of a mixture. Four types can be distinguished: mass concentration, molar concentration, number concentration, and volume concentration. The term concentration can be applied to any kind of chemical mixture, but most frequently it refers to solutes in homogeneous solutions.

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