[Prone position--a risk factor for sudden infant death].
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Humans↗
Biomedical subjects
Schäfer
Publications and source records attributed to Schäfer.
Variations in the number of the Y chromosomal rRNA genes in Drosophila hydei.
The number of rRNA cistrons is measured by filter saturation hybridization in different stocks of D. hydei, where the wild-type X chromosome has one nucleolus organizer (NO) and wild-type Y has two separated NO's. XX/Y females having no X chromosomal NO show an rDNA content exceeding that of a Y chromosome. An even greater increase in the rRNA cistron number is measured in two translocation stocks where the XX is combined with one half of a Y and, therefore, each stock contains only one of the two Y chromosomal NO's. But when the same Y fragments are brought together with a wild-type X chromosome they lose about one-half of their rRNA cistrons within one generation. Males with two complementary Y fragments but having no X chromosomal NO show a considerably higher rDNA content than the XX/Y females, although both are equal in respect of their NO number. Consideration is given to related phenomena in Drosophila melanogaster.
Aneuploidy↗
[Ketosis--a problem of our high-producing milking cow herds].
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Acidosis↗
Report on the Cortical Areas removed from the Brain of a Dog, and from the Brain of a Monkey.
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Journal Article↗