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Digitale Medien

Malignant renal rhabdoid tumour. Immunohistochemical and ultrastructural studies (1988)

SEO, I. S. ; MIN, K. W. ; BRODHECKER, C. ; [weitere]

Oxford, UK : Blackwell Publishing Ltd

Histopathology 13 (1988), S. 0

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ISSN: 1365-2559

Quelle: Blackwell Publishing Journal Backfiles 1879-2005

Thema: Medizin

Notizen: In an effort to establish their possible histogenesis, three cases of renal rhabdoid tumour and their metastases were studied both by a battery of polyclonal and monoclonal antibodies using the avidin-biotin-peroxidase complex technique and by electron microscopy. Vimentin was demonstrated in renal rhabdoid tumour in two cases and in all metastatic deposits. Cytokeratin (39, 43 and 50 kD) was not demonstrable in the three renal rhabdoid tumours, but was strongly positive in all metastatic lesions in one case. Epithelial membrane antigen was present in one renal rhabdoid tumour and in pulmonary metastases in two cases. Ultrastructural study showed epithelial differentiation in all tumours: basal lamina and convergent tight junctions were demonstrated; intracytoplasmic intermediate filaments were present in all primary and metastatic tumours. Rhabdoid tumours thus exhibited heterogeneous immunophenotypic expression suggesting that they are derived from mesenchymal cells which are capable of differentiating into epithelial cells.

Materialart: Digitale Medien

URL: http://dx.doi.org/10.1111/j.1365-2559.1988.tb02096.x

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Digitale Medien

Computational approach to the radio-emission of pulsars (1988)

Choi, C. S. ; Choi, K. H. ; Kim, S. Y. ; [weitere]

Springer

Astrophysics and space science 145 (1988), S. 241-249

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ISSN: 1572-946X

Quelle: Springer Online Journal Archives 1860-2000

Thema: Physik

Notizen: Abstract Radio-emission of pulsars is investigated through computer simulation. We assume that electronpositron plasma is thermal and beam particles haveγ b ≈ in the plasma rest frame. The main purpose of this study is to search for unstable electromagnetic waves which may be caused by beam-plasma interactions. We obtain the dominant waves in the range of radio frequencies in the observer frame. The results show that transverse electromagnetic waves grow rapidly, while electrostatic waves have very slow growth.