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Full-Text Articles in Life Sciences
Tales That Teeth Tell, Patricia W. Freeman, Pauline R. Denham Illustrator
Tales That Teeth Tell, Patricia W. Freeman, Pauline R. Denham Illustrator
University of Nebraska State Museum: Mammalogy Papers
Many of us enjoy walking in the woods or prairie and looking for interesting natural items or behavior. My oldest child now takes delight in spotting and finding things before I do. Often we find skulls, teeth, and bones of mammals and, I suspect, many other people do too given the fact that many of these items are brought into the Museum to be identified. With just a little explanation about what mammals eat and the effect of these foods on the shapes of teeth, an observant person can start to categorize several common mammals if they know what to …
Quantifying The Tooth-Food Interface With Finite-Element Analysis And Photoelasticity, Patricia W. Freeman, W. N. Weijs
Quantifying The Tooth-Food Interface With Finite-Element Analysis And Photoelasticity, Patricia W. Freeman, W. N. Weijs
University of Nebraska State Museum: Mammalogy Papers
We are interested in the tooth-food interface and the functioning of teeth. The cross-sectional shapes of canine teeth of bats can be triangular or polygonal. The vertices of the triangle or polygon represent edges that extend longitudinally from tip to cingulum. One of us proposed there should be differences in how cracks are propagated in the substance being penetrated based on the shape of the tooth. To test this idea we have used finite-element analysis to simulate the effect of an edged tooth versus a non-edged or circular tooth as it penetrated a substance. To see what actually happens we …
Water-Nymphs Of The Platte, Patricia W. Freeman, Keith Perkins
Water-Nymphs Of The Platte, Patricia W. Freeman, Keith Perkins
University of Nebraska State Museum: Mammalogy Papers
Little known, but hauntingly beautiful and valuable to the environment as well, clams and mussels inhabit many Nebraska lakes and rivers. In the first survey of the entire Platte River, the authors found 11 species.
We surveyed mollusks (clams and snails) of the Platte River during the summers of 1990 and 1991. With the exception of the Big Bend reach of the river in Dawson, Buffalo, and Hall counties, no mussels were found in the river's main channel. But in backwaters, lakes and sand-pits along the river, we found 11 species of mussels at 49 different sites from east to …