HANS U. DEBRUNNER (Translated by GOTTFRIED STIASNY) "Orthopaedic Diagnosis"

Translated from the German By

Anomalous Evolution of the Gottfried Sum

We discuss nonperturbative QCD evolution of nonsinglet nucleon structure functions, with particular application to the Gottfried sum. We show that the coupling of the quark partons to bound state mesons leads to nonperturbative contributions to the Altarelli– Parisi equations which, due to the axial anomaly, result in a strong scale dependence of nonsinglet structure functions for values of Q a...

Ultrasound and the diagnosis of orthopaedic disorders.

Diagnostic ultrasound is an invaluable technique in the management of a variety of skeletal disorders. Technical innovations such as colour-flow Doppler, 3-D surface reconstruction and ultrasound contrast agents have introduced new areas of practice and the quality of the images has continued to improve. These developments have led to better understanding of the role of diagnostic ultrasound in...

Diatoms from Brazil: the taxa recorded by Christian Gottfried Ehrenberg

The flora of diatoms from Brazil has been studied by several authors from the beginning of the 19(th) up to now. Some of the old lists and descriptions are unknown or have been ignored by Brazilian researchers and the situation of the names cited was not assessed. Here we compiled a list of 101 taxa of diatoms from Brazil registered by Christian Gottfried Ehrenberg during the 19(th) century. We...

Johann Gottfried Herder : Selected Writings on Aesthetics

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