In 1998, a team led by geologist Birger Rasmussen of the University of Western Australia discovered microscopic drops of fluid oil preserved within mineral grains (similar to gas bubbles trapped in an ice cube) in rocks more than 3 billion years old in Australia's Pilbara region.
"Something that is nonwetting to macroscopic drops does not remain nonwetting for microscopic drops," Varanasi says.
For colocalization study, seedlings were placed on microscopic slide into drop of FM4-64, covered by coverslip and transferred immediately to the microscope.
Mosquito guts were dissected on microscopic slides in several drops of the solution, mounted on other microscopic slides in a drop of the staining solution and covered with cover slips.
Individual species of plankton were mounted on microscopic slides on a drop of 20% glycerin after staining with eosin or rose bengal.
Stool specimens daily collected, in the afternoon were submitted to microscopic examination, in a drop of iodine solution, of both wet smears and sediments after Ridley concentration.
Siliques were dissected using a sharp needle and seeds were extracted and transferred onto microscopic slides into the drop of the Hoyer's solution (http://www.seedgenes.org/Tutorial.html) and cleared for 1 h similarly as described (Friml et al., 2003).
No one looking through a microscope at the intricate world of microscopic creatures living in a drop of pond water can help but be awed.
The ESM material was placed on a microscopic slide, mixed with one drop of 0.04% trypan blue (Sigma-Aldrich), a cover glass was placed onto the ESM after 2 minutes of exposure, and the dye was rinsed out with distilled water.
Visiters can discover a crowded, microscopic world living in a single drop of water, view a three-dimensional model of a hydrogen atom and visit the Great Hall, an exhibit room composed of cement blocks embedded in cobalt blue stained glass.
