3 posts tagged with crystallography.
Displaying 1 through 3 of 3. Subscribe:

Let it snow P3s

All snowflakes are special, but they are classified into just 8 general, 29 intermediate and 121 elementary categories.
posted by hat_eater on Dec 11, 2014 - 9 comments

Painting the first of life's molecules, circa 1961

These days, it's easy to take visualizations of biological molecules for granted, what with the easy availability of an ever-increasing supply of high-resolution X-ray and neutron crystallography data, as well as freely available software that render them into beautiful and useful images that help us understand how life works. The lack of computers and computer networks in the mid-1950s made creating these illustrations a painstaking collaboration, requiring an artist's craftsmanship and aesthetic sense, as well as, most importantly, the critical ability to visualize the concepts that scientists wish to communicate. One such scientific artist was Irving Geis, who painted the first biological macromolecule obtained through X-ray data: an iconic watercolor representation of the structure of sperm whale myoglobin, as seen in the third slide of this slideshow of selected pieces. His first effort was a revolutionary work of informatics, including coloring and shading effects that emphasized important structural and functional features of the myoglobin protein, simultaneously moving the less-important aspects into the background, all while stressing simplicity and beauty throughout. The techniques that Geis developed in this and subsequent works influenced the standards for basic 2D protein visualization that are used today.
posted by Blazecock Pileon on Aug 8, 2012 - 6 comments

From ridicule to Nobel: The quasi-crystals of Daniel Shechtman

In 1982, Daniel Shechtman was on sabbatical at Johns Hopkins University studying aluminum-manganese alloys, and discovered that the resulting crystalline patterns of the alloy resulted in five-way symmetry, much like the famed Penrose Tiles. The resulting publication of these "quasicrystals" resulted in scathing ridicule from most of the scientific community, including Linus Pauling saying "There is no such thing as quasicrystals, only quasi-scientists.", and his research director claiming he had "Brought disgrace" upon their program. However, by 1987 he had managed to grow large enough crystals to be imaged with electron microscopy, verifying his results. His subsequent studies of quasicrystals eventually earned him the 2011 Nobel Prize in Chemistry.
posted by kaszeta on Nov 8, 2011 - 45 comments

Page: 1