Titlebook: Atlas of Xenopus Development; G. Bernardini,M. Prati,G. Scarì Book 1999 Springer-Verlag Italia 1999 Vertebrate.Xenopus, Embryologie.Xenopu

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https://doi.org/10.1007/978-3-540-79386-1ington, PA, U.S.A.) were cut with a metal knife. Semithin sections were stained with Lee’s methylene-blue basic fuchsin stain (data sheet no. 123, Polyscience, Inc.). Micrographs were taken with an Axioplan equipped with an MC80DX camera system (Carl Zeiss Ober¬kochen, Germany) on 50 ISO Velvia Fuji

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, Gametes,es. Cystic spermatogenesis, on the other hand, occurs in anamniotes that often require many spermatozoa for external fertilization. In the cystic testis of ., spermiogenesis is active throughout the year and occurs in continuous waves of differentiating cells (Figs. 1,2).

Terminal

Cleavage,gs. lOd-j, 12). The rate of development depends on the temperature, on the clutch and on the individual embryo. Figure 10 shows how two eggs of the same clutch and fertilized at the same time do not cleave simultaneously. It must therefore be kept in mind that the correspondence between developmental stages and time is not strict.

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Gastrulation,ir apices, mostly in the animal-vegetal direction, forming a groove (which will become the blastopore) and pulling the epithelium of the marginal zone toward the sub-blastoporal endoderm. The bottle cells sink into the embryo, followed by the involuting marginal zone. The area of involution is called the blastopore lip (Fig. 14).

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Networked Slepian-Wolf: Theory and Algorithms,ned by the given optimal transmission structure. We also prove that, if any arbitrary traffic matrix is allowed, then the problem of finding the optimal transmission structure is NP-complete. For some particular traffic matrix cases, we fully characterize the optimal transmission structures and we a

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Condition Monitoring of Machinery in Non-Stationary OperationsProceedings of the S