Biology

In 1986 Julia Levy was giving a talk to some doctors in Waterloo, Ontario about her work on new light-activated drugs. A few years before, she had formed a spinoff company called Quadra Logic Technologies (now QLT Inc.) to commercialize her university research. The doctors were trying these drugs on cancer patients and they were very upset because Johnson & Johnson, another drug company, was...

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Q: What type of salt melts ice the quickest?

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In the news

Pushing the limits of chemistry with iridium

October 22, 2014

Canadian scientists working with the element iridium in Gary Schrobilgen's lab at McMaster university set a new record for the highest formal oxidation state in the periodic table of the elements. Oxidation state describes the number of electrons an atom loses or gains when it joins with other atoms in chemical compounds; the higher the oxidation state, the more electrons, critical in many applications, especially batteries. Previously the highest number was 8. Working with Chinese and German colleagues, the scientists created a gaseous form of iridium tetroxide reaching an oxidation state of 9. More at the Science Media Centre...

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