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  • 1
    Electronic Resource
    Electronic Resource
    Springer
    Journal of molecular medicine 53 (1975), S. 343-345 
    ISSN: 1432-1440
    Keywords: EDTA anticoagulated blood ; capillary blood ; blood platelets ; platelet phagocytosis ; thrombocytopenia ; polymorphonuclear leukocytes ; EDTA-Blut ; Capillarblut ; Thrombocyten ; Thrombocytenphagocytose ; Thrombocytopenie ; neutrophile Granulocyten
    Source: Springer Online Journal Archives 1860-2000
    Topics: Medicine
    Description / Table of Contents: Zusammenfassung Bei zwei Patienten fiel im EDTA-Blutausstrich eine außergewöhnliche Adhärenz von Blutplättchen an Granulocyten auf. In den gleichen Blutproben wurden verminderte Thrombocytenwerte gezählt. Diese Granulocyten-Plättchen-Rosetten treten sehr selten, nur in vitro im EDTA-Blut und an neutrophilen Granulocyten auf. Eine Plättchenphagocytose durch Granulocyten konnte nachgewiesen werden. Die auslösende Ursache ist unbekannt. Zur Vermeidung eines falschen Thrombocytopenie-Befundes sollte bei Beobachtung von Granulocyten-Plättchen-Rosetten eine Kontrolle der Thrombocytenzahl im Capillarblut herangezogen werden.
    Notes: Summary Extraordinary platelet adherence to polymorphonuclear leukocytes was seen in EDTA anticoagulated blood smears of two patients. From the same blood samples platelets were greatly reduced in number. Platelet satellitism (granulocyte platelet rosettes) is a rare phenomenon in vitro, only seen in EDTA anticoagulated blood, and the platelets surrounded polymorphonuclear leukocytes only. Phagocytosis of platelets was also observed. The cause of platelet satellitism is unknown. Capillary blood should be investigated in order to prevent a false thrombocytopenia.
    Type of Medium: Electronic Resource
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  • 2
    ISSN: 1476-4687
    Source: Nature Archives 1869 - 2009
    Topics: Biology , Chemistry and Pharmacology , Medicine , Natural Sciences in General , Physics
    Notes: [Auszug] THERE are considerable advantages to be obtained by using a specially designed television camera for the detection of faint optical images. These advantages arise from the greater quantum sensitivity and the absence of reciprocity failure in the photoelectric effect compared with photography, and ...
    Type of Medium: Electronic Resource
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  • 3
    Electronic Resource
    Electronic Resource
    [s.l.] : Macmillian Magazines Ltd.
    Nature 426 (2003), S. 533-537 
    ISSN: 1476-4687
    Source: Nature Archives 1869 - 2009
    Topics: Biology , Chemistry and Pharmacology , Medicine , Natural Sciences in General , Physics
    Notes: [Auszug] The most important process that allows solar-wind plasma to cross the magnetopause and enter Earth's magnetosphere is the merging between solar-wind and terrestrial magnetic fields of opposite sense—magnetic reconnection. It is at present not known whether reconnection can happen in ...
    Type of Medium: Electronic Resource
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  • 4
    Electronic Resource
    Electronic Resource
    Amsterdam : Elsevier
    Journal of Steroid Biochemistry 28 (1987), S. 178 
    ISSN: 0022-4731
    Source: Elsevier Journal Backfiles on ScienceDirect 1907 - 2002
    Topics: Biology , Chemistry and Pharmacology
    Type of Medium: Electronic Resource
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  • 5
    ISSN: 1573-0956
    Source: Springer Online Journal Archives 1860-2000
    Topics: Geosciences , Physics
    Notes: Abstract The use of simple photographic cameras on early Shuttle missions allowed spacecraft glow to be clearly identified, and its potential for the contamination of weak atmospheric emissions to be estimated. Since those early flights the equipment has been extensively modified so that it is now possible to obtain images with a spectral resolution of 0.1 nm. The early Shuttle glow observations are reviewed and the use of spatially scanned filters to obtain spectral results is described. These glow measurements are discussed in terms of some current ideas for vehicle induced glows and it is suggested that the glow intensity may be controlled by the temperature of the glowing surface. An example of an atmospheric image obtained with the interference filter camera is presented and the limitations in the use of such images are discussed.
    Type of Medium: Electronic Resource
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  • 6
    Electronic Resource
    Electronic Resource
    Springer
    European archives of oto-rhino-laryngology and head & neck 245 (1988), S. 166-169 
    ISSN: 1434-4726
    Keywords: Cisplatin ; Drug resistance ; Glutathione ; γ-Glutamyltranspeptidase ; Head and neck cancer
    Source: Springer Online Journal Archives 1860-2000
    Topics: Medicine
    Notes: Summary Drug resistance is a major problem in chemotherapy of squamous cell head and neck cancers (SCHNC). Since glutathione (GSH) plays a crucial role in mediating tumor cell resistance against various toxic insults, GSH metabolism in SCHNC xenografts was investigated. Xenografts from lymph node metastases contained markedly higher GSH concentrations compared with those derived from the corresponding primary lesions. After subcurative chemotherapy with cisplatin (DDP), a significant increase of both GSH levels and γ-glutamyltranspeptidase activity (γ-GT) was gained in tumor HT1M. Tumor HT3M showed high concentrations of GSH and γ-GT, although these latter concentrations did not increase following chemotherapy with DDP. These findings suggest a possible impact of GSH metabolism on both the formation of metastases and the phenomenon of drug resistance in SCHNC.
    Type of Medium: Electronic Resource
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  • 7
    Electronic Resource
    Electronic Resource
    [s.l.] : Nature Publishing Group
    Nature 323 (1986), S. 519-522 
    ISSN: 1476-4687
    Source: Nature Archives 1869 - 2009
    Topics: Biology , Chemistry and Pharmacology , Medicine , Natural Sciences in General , Physics
    Notes: [Auszug] Laboratory observations of the heterogeneous recombination of oxygen atoms have shown that the molecular yield is a function of temperature14 and that the surface reaction with different materials allows the preferential formation of particular excited states of O215. The in-situ recombination of ...
    Type of Medium: Electronic Resource
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  • 8
    ISSN: 1432-0584
    Keywords: Sideroblastic anemia ; Preleukemia ; Chromosome analysis ; Sideroblastische Anämie ; Präleukämie ; Chromosomenanalyse
    Source: Springer Online Journal Archives 1860-2000
    Topics: Medicine
    Description / Table of Contents: Zusammenfassung Bei zehn Patienten mit IRSA wurden zytogenetische und knochenmarkmorphologische Befunde innerhalb 24 Monaten ein- oder mehrfach kontrolliert. Acht Patienten wiesen einen euploiden Chromosomensatz auf, bei zwei Patienten bestanden stabile klonale Aberrationen (45, XO, -Y und 46, XX, + mär). Während der durchschnittlich 6,8jährigen Krankheitsdauer trat bei keinem Patienten eine Leukämie auf. Auch bei zehn weiteren, bereits verstorbenen Patienten mit IRSA wurden nach 7,7 Jahren Latenzzeit keine Leukämien und 2 maligne Tumoren (Colon- und Prostatacarcinom) beobachtet. Dagegen weisen primäre Besonderheiten der Knochenmarkmorphologie (geringgradige Myeloblastenvermehrung, normale Zellularität, hoher M∶E-Anteil, PAS-positive Erythroblasten), eine zusätzliche Thrombopenie oder schwere instabile klonale Chromosomenaberrationen auf eine Präleukämie mit symptomatischer SA hin Drei derartige Fälle entwickelten nach 1–15 Monaten eine unreifzellige Leukämie.
    Notes: Summary In ten patients with IRSA, chromosome analysis and bone marrow cytology were performed once or several times during 24 months. Bone marrow chromosomes from eight patients showed a normal karyotype. Two patients were found to have stable clonal chromosome aberrations (45, X, -Y [male] and 46, XX, + mar). In a median duration of 6.8 years of IRSA no patient has yet developed acute leukemia. In another ten deceased patients with IRSA no evidence of leukemia, but a carcinoma of colon and prostate were observed in a latency of 7.7 years. Three patients with symptomatic SA developed in 1–15 months an acute leukemia. Two of them showed severe instable clonal chromosome abnormalities. Distinct bone marrow abnormalities (increase of blasts, normal cellularity, reversed M∶E ratio, PAS-pos. erythroblasts), thrombocytopenia, and major clonal chromosome aberrations may help to differentiate IRSA from preleukemic states with symptomatic SA.
    Type of Medium: Electronic Resource
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  • 9
    ISSN: 1432-0584
    Keywords: Myelomonocytic ; Subacute and chronic leukemia ; Bone marrow cytogenetics and cytochemistry ; Lysozyme
    Source: Springer Online Journal Archives 1860-2000
    Topics: Medicine
    Description / Table of Contents: Summary 44 patients suffering from myelomonocytic leukemia (MML) have been observed over the last four years. They have been subclassified in acute myelomonocytic and acute monoblastic leukemias (AMML, n = 12; AMoL, n = 10), subacute myelomonocytic leukemias (SMML, n = 13), and chronic myelomonocytic leukemias (CMML, n = 9) on the basis of bone marrow cytology(blast and promonocyte counts, maturation of granulopoesis) and cytochemical findings (peroxydase and unspecific esterase reaction). This subclassification has been proved to be of prognostic relevance by its good correlation with the mean survival times (AMML: 4.5 months, AMoL: 2.4 months, SMML: 8 months, CMML: 18 months). The acute forms have been treated in general with combined cytostatic chemotherapy, whereas SMML and CMML have been treated this way only in case of progression to an acute phase. These progressions to an AMML have been observed more often and earlier in subacute forms than in chronic forms. The diagnosis of SMML and CMML is supported by the finding of sea-blue histiocytes in the bone marrow, increased lysozyme levels in serum and urine and by the absence of the Philadelphia-Chromosome.
    Notes: Zusammenfassung 44 Patienten mit myelomonozytärer Leukämie (MML) wurden während der letzten vier Jahre beobachtet. Eine Einteilung in akute myelomonozytäre und akute monoblastäre Leukämien (AMML, n = 12; AMoL, n = 10), subakute myelomonozytäre Leukämien (SMML, n = 13) und chronische myelomonozytäre Leukämien (CMML, n = 9) wurde aufgrund der Knochenmarkzytologie (Blasten- und Promonozytenanteil, Ausreifung der Granulopoese) und zytochemischer Befunde (Peroxydase- und unspezifische Esterase-Reaktion) vorgenommen. Diese Einteilung erwies sich als prognostisch relevant durch eine gute Korrelation mit den mittleren Überlebenszeiten (AMML: 4,5 Monate, AMoL: 2,4 Monate, SMML: 8 Monate, CMML: 18 Monate). Die akuten Verlaufsformen wurden in der Regel kombiniert zytostatisch behandelt, während SMML und CMML nur beim Übergang in eine akute Phase zytostatisch therapiert wurden. Derartige Übergänge in AMML wurden bei den subakuten Verlaufsformen häufiger und eher als bei den chronischen beobachtet. Zur Diagnose SMML, CMML trägt das Vorkommen seeblauer Histiozyten im Knochenmark, eine Lysozymerhöhung in Serum und Urin und das Fehlen des Philadelphia-Chromosoms bei.
    Type of Medium: Electronic Resource
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  • 10
    ISSN: 1432-0584
    Keywords: CML ; Busulfan ; Hydroxyurea ; Interferon-alpha ; Duration of chronic phase ; Prospective study
    Source: Springer Online Journal Archives 1860-2000
    Topics: Medicine
    Notes: Summary For palliative therapy during the chronic phase of CML busulfan has proved to be the drug of choice. During the past years hydroxyurea and also interferon-alpha have gained increasing significance since they might prolong the duration of the chronic phase. In a multicenter study it is being determined, whether the use of hydroxyurea or of interferon-alpha instead of busulfan prolongs the duration of the chronic phase of Philadelphia positive CML. Additional goals are the examination of whether the types of disease evolution and the terminal phases differ between the treatment groups, and the prospective recognition of prognostic criteria for the duration of the chronic phase of CML. By December 31, 1987, 326 CML-patients had been randomized, 150 for busulfan, 150 for hydroxyurea and 26 for interferon-alpha. The average age is 50 years. 59 patients reached the end of the chronic phase, 55 died. The mean observation time of all patients is 1.34 years. At present no significant difference in survival is recognizable between the busulfan and hydroxyurea groups. Fewer adverse effects have been observed in the hydroxyurea group. Philadelphia chromosome negative patients show a higher average age and tend to have lower white blood cell and platelet counts. The number of patients having received interferon-alpha is still too small to allow evaluation. This report intends to document organization and progress of this study which to our knowledge is, at present, the largest ongoing prospective multicenter study on the therapy of CML.
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