Irene von Hertwig

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Hyphessobrycon simulans has a Weberian apparatus for transmission of sound energy to the auditory organ, whereas Poecilia reticulata does not. The fine structure of the auditory organs is identical in the two species. The better hearing - expressed by large bandwidth and high sensitivity - typical of the Ostariophysi - seems to be based exclusively on the(More)
The paper sums up results of a 7-day space flight experiment (D-l-Mission-BW-STA 00-STATEX) using growing frog embryos and larvae (Xenopus laevis) as a model system. Evaluation of photographs taken from the surface of sectioned deep-frozen objects, and micrographs using TEM and SEM show no aberrations in the shape, size, position, or respective electron(More)
Reply: High pregnancy rates with administration of granulocyte colony-stimulating factor in ART patients with repetitive implantation failure and lacking killer-cell immunglobulin-like receptors Sir, We read with very interest the letter of Prof. Würfel et al., in which they reported the data of their pilot study in the use of G-CSF in ART patients with(More)
Examination of the epidermis of Rana temporaria in various stages of development revealed the presence of densely ciliated cells from the late neurula until shortly before metamorphosis. Unlike the other epidermal cells, these ciliated cells do not divide; once formed, they are constant in number until they disappear. In shape, size, and structure, however,(More)
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