/oss/taxonomy/term/853/all en /oss/article/videos-technology-history/right-chemistry-making-javel-water <p><div class="media-youtube-video media-element file-default media-youtube-1"> <iframe class="media-youtube-player" id="media-youtube-xvhub-zmabs" width="640" height="390" title="Dr Joe Schwarcz: The making of Javel water" src="https://www.youtube-nocookie.com/embed/xVhUB-zmABs?wmode=opaque&controls=&enablejsapi=1&modestbranding=1&playerapiid=media-youtube-xvhub-zmabs&origin=https%3A//www.mcgill.ca&rel=0" name="Dr Joe Schwarcz: The making of Javel water" frameborder="0" allowfullscreen>Video of Dr Joe Schwarcz: The making of Javel water</iframe> </div> </p> Fri, 14 Sep 2018 16:28:26 +0000 Joe Schwarcz PhD 7355 at /oss /oss/article/health-you-asked/how-does-peroxide-whiten-teeth <p>Ancient Romans, for example, used urine and goat milk to whiten their teeth. This concoction is not as far-fetched as it might first appear. Urine, contains ammonia which is a cleaning agent found in many household products. But today there’s no need to rinse the mouth with urine, which incidentally is usually sterile. Chemistry has given us more effective products.</p> Mon, 21 Jan 2013 02:00:49 +0000 Joe Schwarcz PhD 1862 at /oss