Gao et al. [ 41] performed pullout tests on another design of distally expansive pedicle screw that contains two expanding fins rather than four.
The results demonstrate that the designed propulsor, imitating bluespotted rays with large expanded undulatory fins, is able to propel itself by changing various kinematic parameters.
The prototype contained KNO3/NaNO3 eutectic mixture as phase change material (PCM) and expanded graphite fins arranged in a "sandwich configuration" for improving thermal conductivity.
These include lungs, internal and external gills, the internal skin of the mouth and pharynx (buccopharyngeal epithelium), and the external skin, which can be specialized into respiratory papillae, folds, and expanded tail fins (Duellman and Trueb, 1986; Noble, 1931).
Pantodon has greatly expanded winglike pectoral fins (behind the gills), which are used for short flights in the air, either to escape predators or to catch insects.
The hill stream loaches (Balitoridae) of southeastern Asia possess a large ventral suction disk formed by the expanded pectoral and pelvic fins.
On breaking surface, the pectoral fins are expanded, but the lower lobe of the tail remains in the water, sculling rapidly and accelerating the fish.
The New Yorker, August 31 , 1992P. 28 Talk Story about a horrible smell on North Moore Street, in Tribeca, that turns out to come from T. Chan Enterprises, a food export business, that had recently expanded into the shark-fin business.
Phylogenetic analysis using mammalian IGFBP-2 as an out-group indicated that the duplication of the igfbp-2a/b subfamily expanded during the ray-fin fish genome duplication (Fig. 2B).
Instead, they evolved a flat body by expanding their pectoral fins, which they use to "fly" underwater much like birds use their wings to fly in the air.
