She had used the presence or substitution of heavy atoms to help define earlier structures, and she realized cobalt could play a similar role. (cen.xraycrystals.org)
Get pushed off the screen and it's game over, but when early structures simply consist of pillars and platforms, it's no great hardship. (148apps.com)
There, he used his nonclassical crystallization theory to study the formation of early structures in amorphous calcium carbonate, getting these structures to develop in the absence of any additives for the first time. (sciencemag.org)