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  • 1
    Electronic Resource
    Electronic Resource
    A Trigonometric Series used in Physical Problems (1953)
    [s.l.] : Nature Publishing Group
    Nature 171 (1953), S. 308-309 
    Details
    ISSN: 1476-4687
    Source: Nature Archives 1869 - 2009
    Topics: Biology , Chemistry and Pharmacology , Medicine , Natural Sciences in General , Physics
    Notes: [Auszug] The series concerned is: v sin(n n -f 9 J.(0,p; x), say, 0 〈 x 〈 w, and 〉4(0,9; x) can be expressed as -9 [ (6,2 ) + (9,2a?)], where n -f 0 The transformations for c(0,a?) and s(0,#) were obtained by G. H. Hardy4. Putting 0 = 9 and taking the sum of.A (0,0; x) and A(0, 0; x), one ...
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1038/171308b0
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    Paper (German National Licenses)
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  • 2
    Electronic Resource
    Electronic Resource
    Melanocytes adhere to and synthesize laminin-5 in vitro (1999)
    Oxford, UK : Blackwell Publishing Ltd
    Experimental dermatology 8 (1999), S. 0 
    Details
    ISSN: 1600-0625
    Source: Blackwell Publishing Journal Backfiles 1879-2005
    Topics: Medicine
    Notes: Abstract: Melanocytes arise from the neural crest, migrate to the skin, and can be detected in the basal layer of the epidermis in skin biopsies of human fetuses as early as 11 weeks gestational age. During post-natal life, melanocytes reside at the basal layer of the epidermis, but the ligands to which they attach are unknown. Laminin-5 is a component of anchoring filaments of the lamina lucida of the epidermal basement membrane. In this report we show that human melanocytes adhere to purified laminin-5 to a level comparable with normal human keratinocytes. Blocking antibodies to the 165 kDa subunit of laminin-5 significantly inhibited fetal and neonatal melanocyte attachment to the surface of saltsplit skin, which exposes laminin-5 on its surface, suggesting that laminin-5 is a ligand for melanocyte attachment to the basement membrane in vivo. Western blotting of concentrated culture supernatant of fetal and neonatal melanocytes with anti-laminin-5 antibodies demonstrated a single immunoreactive band of the expected size of laminin-5. In contrast, 3 human metastatic melanoma cell lines did not produce laminin-5. Immunofluorescence microscopy with antibodies to each of the three chains of laminin-5 confirmed the presence of laminin-5 in a peri-cellular distribution around melanocytes, but not melanoma cells. Our results suggest that laminin-5 may be a ligand for normal human melanocytes in the basement membrane, and that loss of laminin-5 production by melanoma cells may be a marker for malignant transformation.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1111/j.1600-0625.1999.tb00373.x
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  • 3
    Electronic Resource
    Electronic Resource
    Extra reproduction of a chromosome in yeast (1953)
    Springer
    Cellular and molecular life sciences 9 (1953), S. 293-294 
    Details
    ISSN: 1420-9071
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology , Medicine
    Notes: Résumé La division d'un chromosome en trois chromatides, au lieu de deux, est décrite et figurée dans deux lignées de levures diploïdes (2N=2). Il est montré que les levures triploïdes peuvent résulter d'aberrations mitotiques.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF02156017
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  • 4
    Electronic Resource
    Electronic Resource
    A prolegomenon to mathematical psychology (1952)
    Springer
    Cellular and molecular life sciences 8 (1952), S. 238-241 
    Details
    ISSN: 1420-9071
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology , Medicine
    Notes: Zusammenfassung Der Gegenstand der Psychologie ist mit zahlreichen ihm innewohnenden Fehlerquellen sowohl logischer wie auch methodischer Art durchsetzt, was wirklichen Fortschritt auf diesem Gebiet, sowie die Erlangung von wissenschaftlichem Status, verhindert hat. Um diesem Mangel abzuhelfen, ist der Versuch unternommen worden, eine unabhängige mathematische Disziplin zu entwickeln, die imstande wäre, psychische Erscheinungen zu beschreiben und zu erklären. Drei Axiome: das der Einschliessung, das der Zuschreibung und das der Handlung sind vorläufig aufgestellt worden. Es ist als erstes Ergebnis dieser Bemühung möglich geworden, den «psychischen Gegenstand» festzustellen und zu beschreiben, was ja die unentbehrliche Voraussetzung dieses Erkenntniszweiges ist. Es ist zu vermuten, dass die oben angedeuteten Postulate und Übereinkünfte zu weiteren Haupt-, Lehr- und Hilfssätzen führen werden, die dem Aufbau einer wissenschaftlichen Psychologie dienen können.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF02170732
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  • 5
    Electronic Resource
    Electronic Resource
    Effectiveness of selection methods in chickpea Cicer arietinum under different environments (1985)
    Springer
    Theoretical and applied genetics 70 (1985), S. 661-666 
    Details
    ISSN: 1432-2242
    Keywords: Fertility ; Spacing ; Response to selection ; Genetic improvement
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology
    Notes: Summary Three selection procedures, single-seed-descent, selection of the best 5% in both seed size and seed yield per plant were followed in two divergent crosses of chickpea under four environments in order to study the improvement of seed yield. Analysis of variance showed wide ranges of variability for all characters except days to maturity. Seed size (SSB) was found to be superior to single seed (SSD), followed by seed yield (YB), for developing high yielding lines. Fertility and spacing had no influence on the efficiency of any selection procedure indicating that selection under any environment is equally good.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00252293
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  • 6
    Electronic Resource
    Electronic Resource
    The slow stationary flow of a micropolar liquid past a sphere (1970)
    Springer
    Journal of engineering mathematics 4 (1970), S. 209-217 
    Details
    ISSN: 1573-2703
    Source: Springer Online Journal Archives 1860-2000
    Topics: Mathematics , Technology
    Notes: Summary The paper is concerned with the slow stationary flow of a micropolar incompressible fluid past a sphere. Adopting the Stokesian approach of neglecting the inertial terms in the momentum equation and the bilinear terms in the balance of first stress moments, the equations are integrated and the flow parameters determined. The drag on the sphere is seen to be more in the present case than that in the case of non-polar fluids. It is found that in spite of the couple stress in the fluid, there is no resultant action by it on the sphere. Numerical work shows that the streamlines in the polar case have greater deflection towards the sphere than in the non-polar (or classical) case.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF01534881
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