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PROTRACTOR

A protractor for clinical use is a device intended for use in measuring the angles of bones, such as on X-rays or in surgery.
National Institutes of Health

Papers overview

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2008
2008
SUMMARY The limbs of running mammals are thought to function as inverted struts. When mammals run at constant speed, the ground… 
1996
1996
Mochokid catfish have two sound‐producing (sonic) organs—a pectoral spine stridulatory apparatus and a swimbladder whose… 
Highly Cited
1987
Highly Cited
1987
Some characteristics of the gravity sensing mechanism in maize root caps were investigated using a bioelectric current as an… 
1982
1982
The structure and mechanism involved in jaw movements are described for an inertial high‐speed suction feeding fish, Chaetodon… 
Highly Cited
1977
Highly Cited
1977
We have purified a cardioexcitatory substance, previously designated peak C, from ganglia of the Sunray Venus clam, Macrocallista… 
Highly Cited
1970
Highly Cited
1970
The radula protractor can be made to be spontaneously rhythmic, although it is normally a quiescent, phasic muscle, with…