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  • 1
    Keywords: Mathematics ; Mathematics, general ; Mathematics ; Konferenzschrift 1976 ; Differentialgleichung ; Numerische Integration ; Differentialgleichung ; Numerisches Verfahren ; Differentialgleichung ; Numerisches Verfahren ; Differentialgleichung ; Numerisches Verfahren ; Differenzengleichung ; Randwertproblem
    Description / Table of Contents: Some convergence results for the PEACEMAN-RACHFORD method in the noncommutative case -- Efficient embedded runge — Kutta methods -- Collocation and iterated defect correction -- Verallgemeinerte Runge-Kutta Verfahren zur Loesung steifer Differentialgleichungssysteme -- A fast iterative method for solving poisson’s equation in a general region -- On the stability regions of multistep multiderivative methods -- Prädiktoren mit vorgeschriebenem Stabilitätsverhalten -- Oscillation and nonoscillation theorems for a second order nonlinear functional differential equation -- Eine spezielle Integralgleichung erster Art -- Ein Zusammenhang zwischen Aufgaben monotoner Art und Intervall-Mathematik -- The RKFHB4 method for delay — Differential equations -- Spiegelung von Stabilitätsbereichen -- On fast poisson solvers and applications -- Considerations concerning a theory for ode-solvers -- Boundary value problems in infinite intervals -- Capacitance matrix methods for Helmholtz’s equation on general bounded regions.
    Type of Medium: Online Resource
    Pages: Online-Ressource (XII, 224 p, online resource)
    ISBN: 9783540359708 , 9783540085393
    Series Statement: Lecture Notes in Mathematics 631
    RVK:
    Language: English
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  • 2
    Electronic Resource
    Electronic Resource
    s.l. : American Chemical Society
    The @journal of organic chemistry 41 (1976), S. 2566-2571 
    ISSN: 1520-6904
    Source: ACS Legacy Archives
    Topics: Chemistry and Pharmacology
    Type of Medium: Electronic Resource
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  • 3
    Electronic Resource
    Electronic Resource
    Oxford, UK : Blackwell Publishing Ltd
    Scandinavian journal of immunology 4 (1975), S. 0 
    ISSN: 1365-3083
    Source: Blackwell Publishing Journal Backfiles 1879-2005
    Topics: Medicine
    Notes: The proband, a healthy primipara, selected for study after she had asserted that she had not previously been pregnant, gave birth to a healthy girl with the karyotype 46.XX In the 21st week of gestation, leukoagglutinin stimulated mitoses from die proband's blood were 99% 46,XX and l% 46.XY. the Y chromosome being identified by its quinacrine fluorescence In two samples taken later in pregnancy no XY mitoses were found in the cultures, but on all three occasions brightly fluorescent Y chromatin in a proportion of the uncultured lymphocyte nuclei showed the presence of XY cells in the proband's blood. High titers of cytotoxic anti-HL-A 3 were detected in the maternal serum before and after delivery. Our tentative interpretation is that the XY cells in the proband's blood emanated from a previous fetus that was legally aborted by curettage on the 10th week of an uneventful pregnancy and which the patient admitted to only after repeated questioning.
    Type of Medium: Electronic Resource
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  • 4
    Electronic Resource
    Electronic Resource
    Oxford, UK : Blackwell Publishing Ltd
    Scandinavian journal of immunology 4 (1975), S. 0 
    ISSN: 1365-3083
    Source: Blackwell Publishing Journal Backfiles 1879-2005
    Topics: Medicine
    Notes: In 10 blood samples from mothers who were studied after the delivery of a male infant and who had Y-body-containing cells in their circulations (mean value, 0.06%) the proportions of surface-Ig- and Y-body-positive lymphocytes were determined after passage through nylon wool. In each case one part of the sample was treated with pronase before the nylon wool incubation and the other was not Passage through nylon wool of maternal lymphocytes not treated with pronase resulted in a drastic decrease of fetal cells, since only 1 Y-body-containing cell was found in 1 of the 10 maternal blood samples studied, as compared with 28 Y bodies in the 10 samples not passed through nylon wool. In lymphocytes pretreated with pronase, 7 fetal cells were recovered after passage through nylon wool, although only in 5 of the 10 samples. Thus most fetal cells in maternal blood adhere to nylon wool, as do B lymphocytes, but this adherence is to some extent affected by pronase incubation.
    Type of Medium: Electronic Resource
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  • 5
    Electronic Resource
    Electronic Resource
    Springer
    Acta neuropathologica 43 (1978), S. 169-178 
    ISSN: 1432-0533
    Keywords: Peripheral nerve ; Myelin ; Axon ; Development ; Interrelationship
    Source: Springer Online Journal Archives 1860-2000
    Topics: Medicine
    Notes: Summary Axon caliber and myelin sheath thickness of individual nerve fibers were evaluated in the developing human sural nerve using three different methods of measurement: 1. ocular micrometer evaluation of large fibers, 2. photographic enlargements for evaluating large numbers of nerve fibers of all sizes, and 3. electron microscopic enlargements for more precise measurements in selected nerves. the average axonal diameter doubles from 5 months gestation to about 5 years of age. Large fiber group axons increase, during the same period, by a factor of 3–3.5 with a slight decrease thereafter. The myelin thickness increases more slowly, but continuously, between 5 months gestation until the age of 14. This asynchronous development of axons and myelin sheaths results in a statistically significant change of the ratio between axonal caliber and myelin thickness. The slope of the regression line is steeper in older than in younger individuals, and the correlation coefficient increases during development of the nerve.
    Type of Medium: Electronic Resource
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  • 6
    ISSN: 1432-0533
    Keywords: Muscle spindle ; Denervation ; Reinnervation ; Muscle fiber atrophy ; Mitochondria
    Source: Springer Online Journal Archives 1860-2000
    Topics: Medicine
    Notes: Summary The fine structure of normal, denervated, and reinnervated muscle spindles in lower lumbrical muscles of rats was studied morphometrically at time intervals ranging from 3–14 months. In control spindles, the mean transverse area of mitochondria was estimated to be more than twice as large in nuclear chain than in typical nuclear bag fibers. Following denervation, there was a severe decrease of the mean number and transverse area of mitochondria, and a moderate, but statistically significant decrease of the mean transverse area of intrafusal muscle fibers (IMFs) despite an increase of the number of IMFs. At 12–14 months of reinnervation, changes of the transverse areas of IMFs were statistically insignificant, but the mean values for the mitochondria were incompletely restored. At 4×3 months, after fourfold repeated crush injuries to the nerve, most of the values estimated (transverse area of mitochondria; number, shape, and transverse area of IMFs and nuclei) tended to approach those in denervated rather than in reinnervated IMFs. The differences of the reactions of intra- and extrafusal muscle fibers following complete motor and sensory denervation appeared to be in accordance with their normal dimensional dissimilarities.
    Type of Medium: Electronic Resource
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  • 7
    ISSN: 1432-0533
    Keywords: Unmyelinated axons ; Sensory neuropathy ; Thalidomide ; Aging ; Senile peripheral nerves
    Source: Springer Online Journal Archives 1860-2000
    Topics: Medicine
    Notes: Summary Sural nerve biopsies of four patients, aged 54–76 years, with a predominantly sensory type of neuropathy following high dosages of thalidomide were examined by light and electron microscopy. The present study includes a qualitative and quantitative evaluation of unmyelinated nerve fibers. Despite severe neuropathy, increased numbers of small unmyelinated axons per endoncurial area were noted in all patients. This numerical increase appeared to be independent of aging, since it was not seen in two senile controls, studied at the age of 83 and 88 years. The increase in the endoneurial density of unmyelinated axons, especially of small sized fibers, is likely to be related to regeneration following degeneration of unmyelinated axons although endoneurial shrinkage secondary to loss of large myelinated fibers could have caused an additional increase in the number of axons per endoneurial area. Axonal sprouting, despite degeneration of large numbers of myelinated and unmyelinated fibers, appears to be consistent with some of the characteristic clinical features of thalidomide neuropathy such as paresthesias, hyperesthesia for pain and temperature, and disturbances of autonomic functions. On the other hand, a variable number of empty Schwann cells (bands of Büngner) and pockets at the surface of many Schwann cells noted in the four patients with neuropathy were also seen in both senile controls with no signs of neuropathy. Thus, it is obvious that pockets and empty Schwann cells may be related to aging or other causes of slow axonal wasting with Schwann cell proliferation and are not necessarily associated with clinically manifest neuropathy.
    Type of Medium: Electronic Resource
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  • 8
    Electronic Resource
    Electronic Resource
    Springer
    Molecular biology reports 2 (1975), S. 119-127 
    ISSN: 1573-4978
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology
    Notes: Abstract Cell suspension cultures from parsley (Petroselinum hortense Hoffm.) were labelled in vivo with [2-3H] adenosine. The RNA isolated from the ribosomal pellet was fractionated on an oligo(dT)-cellulose column. Approximately 1.5% of the RNA, representing about 15% of the total radioactivity, was retained at high salt concentrations and eluted at low ionic strength. As determined by two independent methods, this fraction contained poly(A) segments with an average length of about 80 nucleotides. It was active as template in a cell-free system from wheat germ, directing the synthesis of peptides ranging in molecular weight from about 4000–40000 daltons.
    Type of Medium: Electronic Resource
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  • 9
    Electronic Resource
    Electronic Resource
    Springer
    Journal of cancer research and clinical oncology 49 (1939), S. 505-514 
    ISSN: 1432-1335
    Source: Springer Online Journal Archives 1860-2000
    Topics: Medicine
    Type of Medium: Electronic Resource
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  • 10
    ISSN: 1432-2242
    Keywords: Courtship-behaviour ; Poecilia reticulata ; Mutagenicitytesting
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology
    Notes: Summary An inbred strain (“Istanbul”) of guppies was divided into two substrains, one of which was maintained and bred in seawater. The offspring of irradiated animals of both substrains (1000 R X-rays to spermatogonia and oogonia of neonatal fish) were tested in a new “gruppy male courtship activity test” and compared with control groups. The postirradiation response in the seawater substrain was more intense than in the freshwater substrain.
    Type of Medium: Electronic Resource
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