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  • 11
    Electronic Resource
    Electronic Resource
    Studien zur funktionellen Histologie und Histogenese des Amnions beim Hühnchen und beim Menschen (1953)
    Springer
    Anatomy and embryology 117 (1953), S. 166-214 
    Details
    ISSN: 1432-0568
    Source: Springer Online Journal Archives 1860-2000
    Topics: Medicine
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00523374
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  • 12
    Electronic Resource
    Electronic Resource
    Die Beziehungen des Soma und Germa beim Menschen (1919)
    Springer
    Anatomy and embryology 56 (1919), S. 335-354 
    Details
    ISSN: 1432-0568
    Source: Springer Online Journal Archives 1860-2000
    Topics: Medicine
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF02035693
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  • 13
    Electronic Resource
    Electronic Resource
    Neues Verfahren zur Berechnung der Kommutierung von Gleichstrommaschinen unter Berücksichtigung der Bürstenübergangswiderstände (1990)
    Springer
    Electrical engineering 73 (1990), S. 69-79 
    Details
    ISSN: 1432-0487
    Source: Springer Online Journal Archives 1860-2000
    Topics: Electrical Engineering, Measurement and Control Technology
    Description / Table of Contents: Contents A method of calculation of all current and voltage wave shapes of a de-machine is given. The method is based on a field-harmonic theory which takes all armature reactions between stator and rotor into account. The self- and mutual inductances depend on the rotor position and are obtained by finite element calculations and then resolved into Fourierseries. The switching between brush and commutator is simulated by brush contact resistances which depend on the rotor position and become at times infinity. A simple test machine has been investigated. The results obtained by the field harmonic theory are in good agreement with the measurements. The voltage between adjacent commutator segments seems to be a distinctive quantity to examine the commutation quality.
    Notes: Übersicht Es wird ein Verfahren zur Berechnung des zeitlichen Verlaufes aller Ströme und Spannungen einer Gleichstrommaschine beschrieben. Die Berechnung ist als Oberfeldtheorie aufgebaut, wobei alle Rückwirkungen zwischen Stator und Rotor erfaßt werden. Die ortsabhängigen Selbst-und Gegeninduktivitäten werden unter genauer Berücksichtigung der Geometrie aus numerischen Feldberechnungen gewonnen und in Form von Fourierreihen in die Oberfeld-theoric eingeführt. Der Schaltvorgang zwischen Bürste und Lamelle wird durch rotorpositionsabhängige Bürstenüber-gangswiderstände beschrieben, die zeitweise unendlich werden. Als Anwendungsbeispiel für die Oberfeldtheorie und zum Vergleich mit Messungen dient eine einfache Versuchs-maschine. Die Übereinstimmung zwischen Berechnung und Messung ist als gut zu bezeichnen. Insbesondere die zwischen zwei benachbarten Lamellen auftretende Spannung erscheint zur Beurteilung der Kommutierung geeignet.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF01573450
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  • 14
    Electronic Resource
    Electronic Resource
    Therapie-bedingte Form einer reno-cerebralen Oxalose? (1974)
    Springer
    Acta neuropathologica 27 (1974), S. 181-184 
    Details
    ISSN: 1432-0533
    Keywords: Calcium Oxalate Crystals ; Toxic Changes of Brain Vessels ; Toxic Meningoencephalitis ; Oxalate Metabolism ; Xylitol
    Source: Springer Online Journal Archives 1860-2000
    Topics: Medicine
    Notes: Summary Within a short period of time, we observed 6 cases with the appearance of calcium oxalate crystals in the renal tubuli and in the walls of cerebral arterioles. Reviewing the case histories showed that all of these patients had received large doses of xylitol and had shown subsequently disorders of consciousness. A possible deposition of oxalate crystals following high-dose-therapy with xylitol is discussed.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00687169
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  • 15
    Electronic Resource
    Electronic Resource
    Later changes in brain death. Signs of partial recirculation (1983)
    Springer
    Acta neuropathologica 62 (1983), S. 15-23 
    Details
    ISSN: 1432-0533
    Keywords: Brain death ; Ischemic neuronal alterations ; Brain stem ; Meningoencephalitic reaction ; Reperfusion
    Source: Springer Online Journal Archives 1860-2000
    Topics: Medicine
    Notes: Summary The varying cell picture of the brain in brain death is impressive. Some authors have interpreted this cell picture as a result of intravital autolysis and others as necrosis, at which the maturation time obviously plays an important part. The following time-dependent cerebral changes were established on the basis of an evaluation of 190 brain death cases: (1) neuronal necroses that arise at different rates within the cerebral cortex and the lower brain stem; (2) a hemorrhagic-meningoencephalitic reaction that occurs exclusively at least 4 days after brain death or hemorrhages alone after intervals of at least 48 h; and (3) a washed-out tissue picture. The alterations in the spinal border zone of the total infarction, like in the brain itself, increase rapidly after 48 h. The regular onset of inflammatory alterations after long brain death intervals can only be explained by partial recirculation due to a decline of the high intracranial pressure. The hermorrhages and increasing necroses in some cases with longer intervals therefore are likewise evidence of a not entirely complete cerebral ischemia in spite of an angiographically demonstrable circulatory arrest.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00684915
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  • 16
    Electronic Resource
    Electronic Resource
    Cross-reactivity of monoclonal antibody Leu-19 with some neuroectodermal and other non-immune tissues (1990)
    Springer
    Acta neuropathologica 79 (1990), S. 520-527 
    Details
    ISSN: 1432-0533
    Keywords: Natural killer cells ; Immunohistochemistry ; Leu-19 antigen ; Brain tumors ; Neuroendocrine cells
    Source: Springer Online Journal Archives 1860-2000
    Topics: Medicine
    Notes: Summary Leu-19 antigen is a 200–220 kDa surface glycoprotein, initially detected on natural killer (NK) cells exhibiting non-major histocompatibility complex-restricted cytotoxity. Using a monoclonal antibody (mAb) directed against the Leu-19 molecule, we were unable to identify NK cells immunohistologically in cryostat sections of neuroectodermal tumors. Instead, mAb Leu-19 cross-reacted with the surfaces of the tumor cells, except for melanomas. It stained mesodermal tumor cells less intensely and did not stain those of carcinoma metastases. In three plasmocytomas, cells were observed, most likely NK cells, which extend Leu-19-positive cell processes towards to the unstained tumor cells. Furthermore, the Leu-19 antigen was identified on physiological tissues, especially on all neuroendocrine cells analyzed. The cross-reactions observed with Leu-19 mAb were confirmed using mAb NKH-1, which is also directed against the Leu-19 molecule. Thus, the expression of Leu-19 on neuroectodermal cells is another example of antigen sharing between specialized immune cells and the nervous system.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00296112
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  • 17
    Electronic Resource
    Electronic Resource
    The relationship between Ki-67 labeling and mitotic index in gliomas and meningiomas: demonstration of the variability of the intermitotic cycle time (1991)
    Springer
    Acta neuropathologica 82 (1991), S. 389-394 
    Details
    ISSN: 1432-0533
    Keywords: Immunohistochemistry ; Brain tumors ; Proliferation kinetics
    Source: Springer Online Journal Archives 1860-2000
    Topics: Medicine
    Notes: Summary The monoclonal antibody (mAb) Ki-67 is a marker for the growth fraction (GF) of tumor cells. The exact relationship between the Ki-67 labeling index (LI) and the conventional diagnostic criterion of the proliferative activity of brain tumors, the mitotic index (MI), is unknown except for some general references. On serial frozen sections Ki-67 LI and MI were determined in nearly identical areas of 32 glioblastomas, 20 grade III astrocytomas, 21 grade II astrocytomas and 20 selected cases of meningioma. The data not only clearly showed different median values of LI and MI for the various malignancy grades, but also similar regression coefficients for each glioma type. A non-linear relationship between the two indices was found for all glioma cases with high significance and high correlation coefficient; (LI)=5.6 (MI)0.59. This results from differing intermitotic cycle times, the variability of which can be estimated from the data given.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00296550
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  • 18
    Electronic Resource
    Electronic Resource
    The lipopigments in human brain tissue necroses (1980)
    Springer
    Acta neuropathologica 52 (1980), S. 147-151 
    Details
    ISSN: 1432-0533
    Keywords: Special chromolipids ; Histochemistry ; Fluorescent microscopy ; Hemorrhagic brain tissue necroses
    Source: Springer Online Journal Archives 1860-2000
    Topics: Medicine
    Notes: Summary A serial and comparative histochemical examination of lipopigments in human brain tissue necroses led to a more exact characterization of a chromolipid called “hemoceroid”. It arises only in necroses with hemorrhages and not in anemic necroses nor in subdural hematomas. Its histochemical properties differ from those of all developmental stages of ceroid. An ageing phenomenon is absent. The very intense autofluorescence of the thick, clotted pigment ist striking. Hemoceroid seems to arise extracellularly and is absorbed secondarily by macrophages.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00688013
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  • 19
    Electronic Resource
    Electronic Resource
    Atypische Mitosen bei menschlichen Hirntumoren (Medulloblastome und Glioblastome) (1972)
    Springer
    Acta neuropathologica 20 (1972), S. 171-173 
    Details
    ISSN: 1432-0533
    Keywords: Brain Tumors ; Mitoses, Atypical ; Medulloblastoma ; Glioblastoma
    Source: Springer Online Journal Archives 1860-2000
    Topics: Medicine
    Notes: Summary Disturbed mitoses are classified in slices of 40 medulloblastomas and 10 glioblastomas and their frequency related to all mitotic processes are determined. In medulloblastomas atypical mitoses are to be found significantly more frequently than in glioblastomas. The distribution pattern of several characteristic abnormalities of the mitotic process exhibit a striking resemblance in both kinds of tumor. It is assumed that these disturbances are produced by necrobiotic injury. Moreover, the authors found directions to a mitotic course of the same kind in these both growths, by which they are distinguished from mesenchymal tumors.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00691133
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  • 20
    Electronic Resource
    Electronic Resource
    Amyloid in a multiple sclerosis lesion is clearly of Aλ type (2000)
    Springer
    Acta neuropathologica 100 (2000), S. 709-711 
    Details
    ISSN: 1432-0533
    Keywords: Key words Multiple sclerosis ; Aλ amyloid ; Immunohistochemistry
    Source: Springer Online Journal Archives 1860-2000
    Topics: Medicine
    Notes: Abstract In rare multiple sclerosis cases amyloid is deposited in demyelinated plaques. In one such case amyloid was examined immunohistochemically with a panel of antibodies directed against different amyloid types. The amyloid was classified as the Aλ type produced by a local monoclonal B cell population.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/s004010000244
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