Library

feed icon rss

Your email was sent successfully. Check your inbox.

An error occurred while sending the email. Please try again.

Proceed reservation?

Export
  • 1
    Electronic Resource
    Electronic Resource
    Springer
    Annals of hematology 39 (1979), S. 177-190 
    ISSN: 1432-0584
    Keywords: Chronische myelo-monozytäre Leukämie ; Seeblaue Histiozyten ; Knochenmarksbiopsie ; Elektronenmikroskopie ; Chronic myelomonocytic leukemia ; Sea-blue histiocytes ; Bone marrow biopsy ; Electron microscopy
    Source: Springer Online Journal Archives 1860-2000
    Topics: Medicine
    Description / Table of Contents: Summary Clinical data and light and electron microscopic findings are presented in a patient with chronic myelomonocytic leukemia of about 5 years' duration and no need for specific therapy. Cytogenetic studies failed to demonstrate a Philadelphia-chromosome. The leading clinical symptoms were anemia, moderate hepatomegaly, and leukocytosis with monocytes in the peripheral blood count. Light microscopy of bone marrow cores showed hypercellularity of neutrophil granulocytic and monocytic cell lines including some precursor forms. Electron microscopy confirmed the existence of a biphasic myelomonocytic cell proliferation with predominance of mature forms in both lineages; there were no gross cellular abnormalities and no “hiatus leukaemicus”. Conspicuous were cells of an undeterminated origin apparently neither belonging to the neutrophil granulocytic nor monocytic series and large histiocytic cells, possibly corresponding to the so-called sea-blue histiocytes of light microscopy. The high degree of maturation of both cell lines in the bone marrow is in accordance with the relatively benign and prolongated course of this rare type of leukemia.
    Notes: Zusammenfassung Von einem Patienten mit einer chronischen myelo-monozytären Leukämie von etwa 5 Jahren Dauer und ohne spezifische Therapie werden klinische sowie licht- und elektronenmikroskopische Befunde vorgestellt. Zytogenetische Untersuchungen ließen ein Philadelphia-Chromosom nicht erkennen. Die führenden Symptome waren eine geringe Anämie, eine mäßige Lebervergrößerung und Leukozytose mit Monozyten im peripheren Blutausstrich. Lichtmikroskopische Untersuchungen des Knochenmarkes zeigten eine Zellvermehrung der neutrophilen granulozytären und der monozytären Zellreihen einschließlich einiger Frühformen. Die Elektronenmikroskopie bestätigte das Vorhandensein einer biphasischen myelo-monozytären Zellproliferation mit Vorwiegen der reifen Formen in beiden Zellinien. Es bestanden keine bemerkenswerten zellulären Anomalien und kein „hiatus leucaemicus“. Auffallend waren Zellen unbestimmbarer Herkunft, die weder der neutrophilgranulozytären oder monozytären Reihe sicher zuzuordnen waren, und große histiozytäre Zellen, die wahrscheinlich den sogenannten „seeblauen Histiozyten“ der Lichtmikroskopie entsprechen. Der hohe Grad der Ausreifung in beiden Zellinien im Knochenmark steht in Übereinstimmung mit dem relativ gutartigen und langen Verlauf dieses seltenen Types einer Leukämie.
    Type of Medium: Electronic Resource
    Library Location Call Number Volume/Issue/Year Availability
    BibTip Others were also interested in ...
  • 2
    Electronic Resource
    Electronic Resource
    Springer
    Annals of hematology 38 (1979), S. 407-420 
    ISSN: 1432-0584
    Keywords: Polycythämia vera ; Ultrastruktur des Knochenmarkes ; Kernspalten ; Mikromegakaryozyten ; myeloproliferative Erkrankungen ; Polycythemia vera ; Bone marrow ultrastructure ; Nuclear clefts ; Micromegakaryocytes ; Myeloproliferative disorders
    Source: Springer Online Journal Archives 1860-2000
    Topics: Medicine
    Description / Table of Contents: Summary Electron microscopy (thin sections and freeze-fracture replicas) was performed on the bone marrow of ten patients with Polycythemia vera prior to any treatment. In addition to a hyperplasia of all three cell lineages and the sinuses, atypias were observed in the maturing erythroblasts. These aberrations of normal development consisted mainly of deep invaginations of the nuclear envelope in proerythroblasts and conspicuous nuclear clefts in erythro- and normoblasts. In comparison with similar changes in dyserythropoietic and aplastic anemia as well as leukemia these alterations are discussed in connection with disturbances of DNA synthesis. Further atypias involved megakaryopoiesis which displayed microforms probably as an evidence for maturation arrest. These ultrastructural abnormalities with their morphological features of a neoplastic proliferation of all three cell lineages in Polycythemia vera are in good agreement with the new concept of a transformation of a pluripotent stem cell with clonal character.
    Notes: Zusammenfassung Elektronenmikroskopische Untersuchungen (Dünnschnitte und Gefrierbrechungen) wurden am Knochenmark von zehn Patienten mit Polycythämia vera vor der Behandlung durchgeführt. Au\er der Hyperplasie aller drei Zellreihen und der Sinus wurden vor allem Atypien der reifenden Erythroblasten gesehen. Diese Abweichungen der normalen Entwicklung bestanden hauptsächlich aus tiefen Einstülpungen der Kernhülle im Proerythroblasten und in auffallenden Kernspalten in Erythro- und Normoblasten. Im Vergleich zu ähnlichen Veränderungen bei dyserythropoetischen und aplastischen Anämien ebenso wie bei Leukämien werden diese Anomalien im Zusammenhang mit Störungen der DNA-Synthese diskutiert. Weitere Atypien betrafen die granulocytäre Reihe mit abnormen Kernschleifen und die Megakaryopoese, die Mikroformen aufwies, was wohl als ein Ausdruck der Reifungshemmung zu werten ist. Diese ultrastrukturellen Anomalien mit ihren morphologischen Kriterien der neoplastischen Proliferation aller drei Zellreihen bei der Polycythämia vera passen gut in das neue Konzept der Transformation einer pluripotenten Stammzelle mit klonalem Charakter.
    Type of Medium: Electronic Resource
    Library Location Call Number Volume/Issue/Year Availability
    BibTip Others were also interested in ...
  • 3
    ISSN: 1434-0879
    Keywords: Experimental bladder carcinoma ; Cyclophosphamide ; Tumour weight
    Source: Springer Online Journal Archives 1860-2000
    Topics: Medicine
    Notes: Summary Infiltrating transitional cell carcinomas of the urinary bladder were induced by ingestion of 0.188% N-[4-(5-nitro-2-furyl)-2-thiazolyl] formamide (FANFT) in 145 female Wistar rats. After 8 months of carcinogen exposure, the animals were divided into different treatment groups. They received cyclophosphamide intraperitoneally as a single injection or BCG either once intralesionally or weekly subcutaneously or a combination of cyclophosphamide followed by subcutaneous BCG. The treatment effect was determined by body weight measurements and bladder tumour weight after 12 months. Compared with a control group statistically significant differences of bladder tumour weights were found after treatment with BCG alone or in combination with cyclophosphamide. Intralesional BCG resulted in an insignificant increase of tumour weights.
    Type of Medium: Electronic Resource
    Library Location Call Number Volume/Issue/Year Availability
    BibTip Others were also interested in ...
  • 4
    Electronic Resource
    Electronic Resource
    Stamford, Conn. [u.a.] : Wiley-Blackwell
    Polymer Engineering and Science 19 (1979), S. 284-293 
    ISSN: 0032-3888
    Keywords: Chemistry ; Chemical Engineering
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology , Mechanical Engineering, Materials Science, Production Engineering, Mining and Metallurgy, Traffic Engineering, Precision Mechanics , Physics
    Notes: Single phase interpenetrating polystyrene networks were synthesized using a room temperature photopolymerization method. Divinylbenzene was used for crosslinking both networks in most cases; a few IPNs were prepared using acrylic acid anhydride to provide labile crosslinkages in the primary network. The IPNs were characterized by means of equilibrium swelling in toluene. The results of these experiments closely approached the predictions of a swelling equation derived under the assumption that the two networks were elastically independent. Deviations from the swelling equation predictions could be explained in terms of contributions from internetwork entanglements. Small amplitude dynamic mechanical measurements indicated that the presence of the small amount (∼10 percent) of tight primary network chains had no perceptible effect on the linear viscoelastic properties.
    Additional Material: 16 Ill.
    Type of Medium: Electronic Resource
    Library Location Call Number Volume/Issue/Year Availability
    BibTip Others were also interested in ...
  • 5
    Electronic Resource
    Electronic Resource
    Springer
    Archives of virology 62 (1979), S. 77-82 
    ISSN: 1432-8798
    Source: Springer Online Journal Archives 1860-2000
    Topics: Medicine
    Notes: Summary The ultrastructure and maturation of avian pox virus particles is described in the rare case of a naturally infected hawk(Falco cherrug). As in other cells infected by fowlpox virus two types of inclusion bodies are encountered in the cytoplasm: firstly assemblies of fluffy filamentous material apparently giving rise to immature virions. They are thought to present virus factories (inclusion body B). Secondly mature virus particles budded into extensive groupings (Bollinger bodies, inclusion body A) which display a fine structure identical to other strains of fowlpox virus.
    Type of Medium: Electronic Resource
    Library Location Call Number Volume/Issue/Year Availability
    BibTip Others were also interested in ...
Close ⊗
This website uses cookies and the analysis tool Matomo. More information can be found here...