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During the TEXUS-17 flight (April/May 1988) eggs of a higher organism, the anuran amphibian Xenopus laevis, have for the first time been successfully fertilized under microgravity on a Sounding… (More)
One assumes that gravity cooperates with the sperm in the establishment of bilateral symmetry in the embryo, particularly in species with yolky eggs. However, only experiments under genuine… (More)
The Embryo Collection of the Hubrecht Laboratory is a treasure house of comparative embryology. It is the largest and most important collection of its kind in the world, and consists of thousands of… (More)
Several sets of network element values may result in identical coefficients in a network function. Some or all of the alternative element sets may be comprised of elements which are all real and… (More)
A study of the reconstruction of single tone sequences from a musical instrument, a piano here, is described. The nature of piano tones is examined and a means of digital data capture and… (More)
Egg rotation and centrifugation experiments strongly suggest a role for gravity in the determination of the spatial structure of amphibian embryos. Decisive experiments can only be made in Space.… (More)