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  • 1
    ISSN: 1476-4687
    Source: Nature Archives 1869 - 2009
    Topics: Biology , Chemistry and Pharmacology , Medicine , Natural Sciences in General , Physics
    Notes: [Auszug] In 1949 Barr and Bertram1 described a sexual dimorphism in intermitotic nuclei and suggested that the presence of a sex-chromatin (female nuclear sex) was dependent on the presence of two X-chromo-somes. It has been assumed that the absence of a sex-chromatin (male nuclear sex) as in normal males, ...
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  • 2
    Electronic Resource
    Electronic Resource
    Amsterdam : Elsevier
    Journal of Steroid Biochemistry 11 (1979), S. xviii 
    ISSN: 0022-4731
    Source: Elsevier Journal Backfiles on ScienceDirect 1907 - 2002
    Topics: Biology , Chemistry and Pharmacology
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  • 3
    Electronic Resource
    Electronic Resource
    Springer
    Cellular and molecular life sciences 3 (1947), S. 459-460 
    ISSN: 1420-9071
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology , Medicine
    Notes: Summary The fatty liver in phosphorus poisoning of rabbits shows a marked increase of cytochrome c.
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  • 4
    Electronic Resource
    Electronic Resource
    Springer
    Cellular and molecular life sciences 3 (1947), S. 462-464 
    ISSN: 1420-9071
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology , Medicine
    Notes: Summary Technique and discussion of a spectrophotometric method to determine cytochromec. Normal values of rabbits and rats.
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  • 5
    Electronic Resource
    Electronic Resource
    Springer
    Cellular and molecular life sciences 4 (1948), S. 153-154 
    ISSN: 1420-9071
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology , Medicine
    Notes: Summary In the rat splenectomy has no influence on the level of hæmoglobin and of cytochrome c. The participation of the spleen in the metabolism of hæm pigments is either negligible or can be compensated for by extra-splenic activities.
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  • 6
    Electronic Resource
    Electronic Resource
    Springer
    Cellular and molecular life sciences 6 (1950), S. 351-351 
    ISSN: 1420-9071
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology , Medicine
    Notes: Summary The authors found (1) in female horses a significant higher serum iron level than in male horses, and (2) in castrated male horses a significant lower level than in not castrated male horses.
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  • 7
    Electronic Resource
    Electronic Resource
    Springer
    Human genetics 〈Berlin〉 24 (1974), S. 93-104 
    ISSN: 1432-1203
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology , Medicine
    Description / Table of Contents: Zusammenfassung Unter 130 vorwiegend präpuberalen Patientinnen mit Merkmalen des Turner-Syndroms wurde bei 89 ein abnormer Geschlechtschromosomen befund erhoben, nämlich 61 Fälle von XO, 11 XXqi und XO/XXqi, 8 XO/XX, 6 XO/XXr, 1 45,XO/47,XY,+18 und 1 XO/XXq-. 5 der 11 Isochromosomen des langen X-Armes waren vom dizentrischen Typus, wobei unsere Befunde darauf hinweisen, daß dieser Typus instabil ist und deshalb öfter aus den Zellen verlorengeht als die monozentrischen Isochromosomen. Bei Patientinnen mit XO/XX-Mosaik ergab sich ein interessanter Befund bezüglich der Größe der Mosaikbezirke in der Epidermis. Der Mosaizismus war in 80% der Präparate einzelner Kopfhaare, Augenbrauen-, Axillar- und Pubeshaare nachweisbar. Dies stimmt gut überein mit klinischen Beobachtungen über das Mosaikmuster bei heterozygoten Frauen für die X-chromosomale, anhidrotische ektodermale Dysplasie: In den erwähnten Körperregionen fehlen alle Hinweise auf ein Mosaik von makroskopischem Ausmaß, dies im Gegensatz zum großflächigen Mosaizismus an Teilen des Stammes und der Extremitäten.
    Notes: Summary Of 130, mostly prepubertal girls with features of Turner's syndrome, 89 had an abnormal sex chromosome complement, namely 61 XO, 11 XXqi and XO/XXqi, 8 XO/XX, 6 XO/XXr, 1 XO/XY, 1 45,XO/47,XY+18, and 1 XO/XXq-.5 of 11 isochromosomes for the long X arm were of the dicentric type. Our data indicate that this type is unstable and there-fore is lost from the cells more often than monocentric isochromosomes. In XO/XX mosaics an interesting observation was made concerning the pattern size of mosaic areas in the epidermis. Mosaicism was demonstrable in 80% of preparations from single hair roots from the scalp, the eyebrows, the axilla, and the pubic region. This finding agrees with clinical observations on mosaic pattern size in heterozygotes for anhidrotic ectodermal dysplasia; absence of a macroscopical mosaic in the mentioned body regions, in contrast to the large pattern size evident in the epidermis of portions of the stem and extremities.
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  • 8
    Electronic Resource
    Electronic Resource
    Springer
    Human genetics 〈Berlin〉 5 (1968), S. 216-225 
    ISSN: 1432-1203
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology , Medicine
    Description / Table of Contents: Zusammenfassung Bei einem normal intelligenten, kleinwüchsigen, 219/12 jährigen Mann mit Hypospadie, fraglicher rudimentärer Vagina und hypergonadotropem Hypogonadismus findet man bei der Biopsie des nur 7 ml großen linken Hodens eine gleichförmige tubuläre Atrophie mit Fehlen des Keimepithels und eine diffuse, kleinherdige Leydigzellwucherung. Sex-Chromatin in den Leydigzellen, im Mundabstrich und Drumsticks negativ. Karyotyp in den Lymphocyten und im Knochenmark normal weiblich (46,XX), in den Fibroblasten jedoch 45,XO. Somit weist dieser Patient Testesgewebe auf, das Y-Chromosom ist aber unauffindbar. Zur Klärung dieser Diskrepanz scheint das Vorhandensein einer dritten, zahlenmäßig stark in den Hintergrund tretenden, ein Y enthaltenden Zellpopulation die naheliegendste Hypothese zu sein. Eine Zwillingsschwester kam im Neugeborenenalter ad exitum; die Blutgruppenuntersuchungen beim Patienten und seiner Familie machen aber einen Blutchimärismus sehr unwahrscheinlich. Das klinische Bild unseres Patienten ist vollkommen verschieden von demjenigen, das beim XX/XO-Mosaik üblicherweise beobachtet wird und läßt sich auch vom klassischen Klinefelter-Syndrom deutlich abgrenzen. Es zeigt Ähnlichkeiten mit einigen Fällen von XO/XY-Mosaik.
    Notes: Summary In a normally intelligent man of 219/12 years the following main physical findings were present: short stature, hypospadias, possibly a rudimentary vagina, hypergonadotropic hypogonadism, small testis (7 ml) with tubular dystrophy consisting in absence of germinal epithelium and localized proliferation of Leydig's cells. Sex chromatin in buccal mucosa cells was negative; no drumsticks were found in neutrophils. The karyotype in lymphocyte cultures and bone-marrow preparations was 46,XX; in several independent fibroblast cultures 45,XO. The most likely explanation for the presence of testicular tissue seems to be the existence of an undiscovered cell population containing a Y-chromosome. A twin sister of the patient died in early infancy; blood group investigations gave no indications for the presence of blood chimerism. The clinical picture of this patient is entirely different from that of the usual XX/XO mosaics, it also clearly differs from Klinefelter's syndrome but shows some similarities to cases of XO/XY mosaicism.
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  • 9
    Publication Date: 1947-11-01
    Print ISSN: 0014-4754
    Topics: Biology , Medicine
    Published by Springer
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  • 10
    Publication Date: 1947-11-01
    Print ISSN: 0014-4754
    Topics: Biology , Medicine
    Published by Springer
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