01-Crack extension in human dentin. Crack extension from the notch in a compact tension dentin sample from a 32 year old male. Figure (a) Low magnification view (24X); (b) A higher magnification view of a crack that has reached a location of low lumen density. The crack has become partially arrested and a secondary crack has developed in the closest region with highest lumen density and further linking with the primary crack.
02-Isopod Feeding in Microcosm. The leaf shredding Isopod Caecidotea communis was utilized in a laboratory microcosm study to explore the various effects of nutrient enrichment on freshwater stream ecosystems. Pictured here is one such Isopod which has fed upon a blade of nitrogen enriched Reed Canary Grass (Phalaris arundinacea, a common riparian grass) subsequently skeletonizing it.
03-Caddisfly Larvae and Case…That’s a Wrap. Caddisfly larvae of the family Molannidae. This family of caddisflies construct “sleeping bag” like casings out of the soft sandy substrate of freshwater streams to protect them during their aquatic larval stages. Photo depicts a molannid both in and removed from its casing collected from an agriculturally impacted headwater stream in Ellicott City, MD.
04-Flabellare mating coloration. Females are typically the choosy ones in the Darter species Etheostoma. At the right time of the year males put on a display that is used to entice and impress them. The striking bands and darkening of the face can go away in a moments notice though, due to fast acting chromatophores.
05-Flower in the Desert. Image of the surface of a titanium microsample with residual debris that formed an unique dendritic flower pattern. The first image shows the dendritic flower under scanning electron microscopy mode whereas the second image on the bottom illuminates the background of the titanium microstructure through the use of backscatter electrons.
06-Icicles Hanging On Off a Cliff. Looking like icicles hanging on a cliff, these crystals are seen stitching across irregularities on the face of metallic disc. Image taken at a magnification of x1000 on a SEM (JEOL JSM-35CF).
07-Orbiting the Sun. Mars contrasting against the flare of the sun. Not really… Image taken at a magnification of x35 on a SEM (JEOL JSM-35CF).
08- “CNT-Infused Glass Fiber”. Carbon Nanotubes (CNTs) are infused and arranged radially along the surface of a glass filament. The glass filament is approximately 10 microns in diameters while each CNT is approximately 10 nanometers in diameter and 10 microns long.
09-“Nano-Mushroom”. An agglomeration of catalyst particles creates the head of the Nano-Mushroom which stands atop a stem of carbon nanotubes.
10-Organization of different cell types in the zebrafish neural tube. In vertebrates, the brain and the spinal cord develop from a tube-like structure known as the neural tube. The cells(DAPI, blue) of this tissue are highly organized. Progenitor cells are found along the ventricular surface. These cells divide (PH3, pink) and undergo neuronal differentiation (HuC, green) and migrate to basal regions. As these neurons mature they extend axonal projections (acetylated tubulin, red) and eventually form distinct connections.
11-Loss of Adhesion Disrupts the Organization of the Neural Tube. Loss of N-cadherin, a cell adhesion mutant results in disruption of the organization of the neural tube. Differentiated neurons (HuC, pink) do not migrate to basal regions and are found dispersed throughout the neural tube. The organization of the neural tube can be seen by labeling with phalloidin (polymerized actin, green).
12-Future Scientist Observing Zebrafish Embryos. Six year old Lloyd Degnan observing zebrafish embryos as they progress from the two to the four cell stage. Lloyd spent the day at UMBC exploring many different labs and performing several experiments including a PCR and a mouse olfactory choice test. When he was asked what is DNA? Lloyd responded “The recipe for life.”
13-Dentin Tubules Within Molar Root Canal. This is a photograph of the microstructure of human dentin within the root canal of a molar, where the black voids seen are the microscopic dentin tubules and the various shades of gray and white show the varying densities within the dentin. It was taken using the scanning electron microscope at 15kV under a magnification of 1500x.
14-The Colorful Uropod of the Manits Shrimp Hemisquilla Californiensis. Mantis shrimp have a highly advanced color vision system and are capable of detecting twelve distinct color wavelengths; from the ultraviolet, through our visual spectrum, and into the infrared. This visual spectral diversity is reflected in their infraspecific color signals, such as those of the Uropod, a tail feather-like structure.
15- Uropod Fluorescence of the Mantis Shrimp Odontodactylus Latirostris. In the the dim, spectrally narrow waters of the deeper oceans, mantis shrimp amplify their visual communication signals using fluorescence. In this 400X magnified view of the uropod (a tail feather-like structure), stimulation with ultraviolet light produces autofluorescence of several different pigments in the cuticle.
16-Mysterious Visitor. This Horned Ghost Crab was found scurrying across the nighttime beaches of Lizard Island, Australia. The black pupil pictured in the left eye of this crab represents the pseudopupil created when individual units of a compound eye are pointed directly at the viewer. However the eye rotates, it appears as if the crab is always looking directly at you!
17-Dance of the Little Crab Larvae. Unlike adult crabs living on the sea floor, crab larvae are adapted for life in open water. They possess mostly transparent, heavily armored carapaces as well as eyes that are very large relative to their body size. Pictured here is the tail motion larvae used to propel themselves through the water to capture prey and avoid becoming prey themselves.
18-Orientation Map of Grade 1 Titanium. The picture is a crystal orientation map of grade 1 titanium, and the data was gathered using electron backscatter diffraction (EBSD). There is no dominant crystallographic texture present, and there is a large spread in the grain sizes. The rolling and normal directions are vertical and horizontal, respectively.
19-Confocal Image of an SY5Y Neuron Exposed to Beta Amyloid-42 Fibrils. A confocal image of a SY5Y neuron that has been exposed to beta amyloid fibrils and then stained with Phycoerythrin-conjugated antibody that are specific to phosphotyrosines. The red staining corresponds to phosphorylation of cytoplasmic proteins . Beta- amyloid is believed to trigger events in cell signaling that ultimately leads to necrosis and apoptosis observed in neurodegenerative diseases like Alzheimers disease. Phosphorylation of cytoplasmic proteins is believed to be one of the early events in this pathway.
20-Nuptial Coloration in Etheostoma. The top picture is a male Ethesotoma zonistium with breeding coloration. The middle and lower panels show chromatophores from male E. zonistium and E. zonale. Chromatophores are cells containing pigment and light reflecting structures that produce coloration in fishes.