2020 Small World in Motion Competition

Fluorescent actin (Lifeact-EGFP) expressed in an embryonic rat hippocampal neuron

Dr. Andrew Moore Dr. Pedro Guedes-Dias

Affiliation
Howard Hughes Medical Institute (HHMI)
Janelia Research Campus
Ashburn, Virginia, USA
Technique
Confocal
Magnification
100X (Objective Lens Magnification)

Dr. Andrew Moore captured this stunning video of neurons in an embryonic rat using a confocal microscope and fluorescent actin (Lifeact-EFGP) and is part of a larger experiment that set out to observe actin dynamics during neurite outgrowth. This movie was a combination of efforts which began with the transient transfection of a fluorescent actin sensor in to the neuron. Often the efficiency of this process is quite low so the next efforts required being able to optimize the microscope system to visualize the expression shown. In the end, it was all worth it, since this was the first time Dr. Moore had witnessed Neurite outgrowth. And of course, winning 4th Place in the Nikon Small World in Motion competition was an added bonus!

A blackworm (Lumbriculus variegatus) displaying peristaltic movements

Martin Kaae Kristiansen

Affiliation
My Microscopic World
Aalborg, Nordjylland, Denmark
Technique
Polarized Light
Magnification
4X (Objective Lens Magnification)

This video of a blackworm, found in a pond water sample shows peristaltic (wavelike muscular contraction) movement inside the worm. Using a combination of optical staining and polarized light, it allowed Martin Kaae Kristiansen the ability to not only see inside the creature, but to observe and record its movements without hurting it. He finds this type of study important because it allows people to learn more about these tiny subjects and helps refine the lighting and staining techniques used in this and many other types of research.

Crystallization of a callus removal solution

Wojtek Plonka

Location
Krakow, Malopolskie, Poland
Technique
Polarized Light
Magnification
6.3X (Objective Lens Magnification)

The 5th place movie shows crystals from an over-the-counter callus remover growing as moisture is removed from the sample. Although Mr. Plonka’s main work involves computer simulations in chemistry (primarily for the purpose of drug design), he enjoys capturing stunning images of crystallization through the microscope as a sideline. Callus remover, which is a combination of lactic acid and salicylic acid, is a particularly popular sample due to its ability to crystalize into beautiful structures. It does require practice and talent to capture crystallization at this quality. From an equipment perspective, however, callus removal solution crystals can be observed with a standard high school science laboratory microscope.