Zur Frage der Umdifferenzierung der Knorpelzellen der Gelenkoberfläche am Beispiel der Synovialgrubenbildung*

It was shown both light and electronmicroscopically on cartilage of elbow and hock joints of calves and pigs that during formation of synovial fossae, fibrocytes and covering cells of the synovial layer can arise from chondrocytes.     

Zur mikroskopischen Anatomie der Epidermis an der Schweineklaue

To gain a basis for diagnosing the frequent pathological changes of the porcine hoof, the fine structure of normal hoofs taken from landrace pigs was examined with the light microscope, the polarizing microscope and the electron microscope. The hoofs were taken mostly from 6 to 7 month-old slaughtered pigs, but also from younger animals, beginning at birth. The hoofs destined for light microscopical study were not softened before frozen sections were made; these sections were stained while floating on the stain. The hoof horn of the pig consists of mostly flat cells which are shaped like pancakes. The horn tubules often have oval cross sections and do not present a distinct boundary with the adjacent intertubular horn. The harder horn of the hoof has more horn tubules per mm² than the softer horn.     

Zur Feinstruktur der normalen Kapillaren in der grauen Substanz der Großhirnrinde beim Schwein1

Fine structure of normal capillaries in the gray matter of the cerebral cortex of the pig The capillaries in the cerebral cortex over the Ammon's horn were studied with the electron microscope in 8 specific pathogen-free pigs. The capillaries had a thin continuous endothelium without perivascular space and their lumina on the average measured 5.8 ± 1.23 μm. in diameter. Their fine structure was by and large similar to that described for the capillaries of other species.