Chemistry

December is Glass Month

December is Glass Month

With November behind us, we’re wrapping up our 2012 Year of Materials theme, this month, with a focus on glass. Glass, in the broadest sense of the term, does not imply any particular type of atomic or molecular composition, but rather a particular kind of ordering of atoms or molecules in space. Or rather, a lack thereof. In understanding this it is helpful to contrast glasses with crystals, in which atoms/molecules are arranged in repeating rows, columns, or other identifiable patterns, like cannonballs stacked on a courthouse lawn. Glasses, on the other hand, are more like dice poured haphazardly into a jar.

Maker Faire New York: Using Microbes to Etch PCBs

Maker Faire New York: Using Microbes to Etch PCBs

Acidithiobacillus ferrooxidans is a gram-negative bacterium that lives, in the natural world, in iron sulfide (aka “pyrite,” aka “fool’s gold) deposits, where it eats iron and sulfur and excretes sulfuric acid. Now, a team of graduates, undergraduates, and post-docs at New York’s Columbia and Cooper Union universities is working to develop a genetically-modified strain of A. ferrooxidans…