. Bonner zoologische Monographien. Zoology. 39 likely contribute to the most mechanically resistant egg jelly layers. Details of the mechanical properties of the urodele egg jelly are unknown, however. After oviposition size of gland cells is markedly reduced and cells are largely free of secretions (Fig. 7; see Kambara 1956; Andreozzi et al. 1970). More detailed fme structural studies are lacking. The vivid synthesis of secretions and the pronounced compartmentalization of gland cells can be shown already at the light microscopical level by staining the different secretory products and by dem
. Bonner zoologische Monographien. Zoology. 39 likely contribute to the most mechanically resistant egg jelly layers. Details of the mechanical properties of the urodele egg jelly are unknown, however. After oviposition size of gland cells is markedly reduced and cells are largely free of secretions (Fig. 7; see Kambara 1956; Andreozzi et al. 1970). More detailed fme structural studies are lacking. The vivid synthesis of secretions and the pronounced compartmentalization of gland cells can be shown already at the light microscopical level by staining the different secretory products and by demonstrating activity of key enzymes such as thiaminepyrophosphatase in the dictyosomes (Fig. 8a). In the uterine epithelium activity of several hydrolases and oxidoreductases has been demonstrated (Greven et ) that occurs also in other portions of the oviduct (Fig. 8b). The latter indicate the strong oxidative metabolism of the tissue. Positive reactions of. Please note that these images are extracted from scanned page images that may have been digitally enhanced for readability - coloration and appearance of these illustrations may not perfectly resemble the original Bonn, Zoologisches Forschungsinstitut und Museum Alexander Koenig
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