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  • 1
    Electronic Resource
    Electronic Resource
    Hormone control of heme synthesis in cultures of human fetal liver cells (1974)
    s.l. : American Chemical Society
    Biochemistry 13 (1974), S. 4255-4263 
    Details
    ISSN: 1520-4995
    Source: ACS Legacy Archives
    Topics: Biology , Chemistry and Pharmacology
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1021/bi00718a002
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  • 2
    Electronic Resource
    Electronic Resource
    Octopaminergic neurons in the locust brain: morphological, biochemical and electrophysiological characterisation of potential modulators of the visual system (1995)
    Springer
    Journal of comparative physiology 177 (1995), S. 611-625 
    Details
    ISSN: 1432-1351
    Keywords: Cobalt staining ; Gas chromatography-mass spectrometry ; Immunohistochemistry ; Insect ; Neuromodulation
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology , Medicine
    Notes: Abstract The two Protocerebral-Medulla 4 neurons (PM4a and b) in the locust brain have adjacent cell bodies in the medial deutocerebrum. They project through the posterior protocerebrum, forming limited arborisations en route, and enter the lobula and medulla of the ipsilateral optic lobe, where they form extensive, overlapping arborisations. The PM4a and b neurons are octopamine immunoreactive. Their octopamine content (approximately 25 pg per cell) is confirmed by gas chromatography-mass spectrometry; each cell contains approximately 25 pg p-octopamine. Simultaneous intracellular recording from exposed PM4a and b cell bodies reveals that the two cells are physiologically indistinguishable. They receive multimodal sensory inputs. Tactile/mechanosensory stimuli to much of the animal's body and head, acoustic stimuli, and simple visual stimuli all give rise to e.p.s.p.s and action potentials in the PM4 cell body. Simultaneous recording from the cell body in the deutocerebrum and the axon in the lobula demonstrates that action potentials are predominantly initiated in the deutocerebrum and propagate centrifugally, towards the optic lobe. Occasionally, bright light flashes will initiate an action potential in the axon in the optic stalk, which probably propagates bidirectionally: centripetally to the cell body, and centrifugally into the optic lobe. The extensive arborisations in the lobula and medulla are therefore likely to be sites of octopamine release. Because PM4 neurons are octopaminergic, project to the optic lobe, and receive modalities of sensory input known to dishabituate the Descending Contralateral Movement Detector (DCMD) visual interneuron, it is proposed that PM4 neurons are neuromodulatory — mediating dishabituation or arousal of the visual system.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00207190
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  • 3
    Electronic Resource
    Electronic Resource
    Die Wirkung des Glyzins auf chronischen Morphinismus (1974)
    Springer
    Cellular and molecular life sciences 30 (1974), S. 1432-1432 
    Details
    ISSN: 1420-9071
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology , Medicine
    Notes: Sumamry Glycine inhibits withdrawal induced by nalorphine-like synthetic ‘substance P’ on mice chronically treated with morphine.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF01919679
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  • 4
    Electronic Resource
    Electronic Resource
    Chimaeras Obtained by Aggregation of Mouse Eggs with Rat Eggs (1973)
    [s.l.] : Nature Publishing Group
    Nature 243 (1973), S. 472-473 
    Details
    ISSN: 1476-4687
    Source: Nature Archives 1869 - 2009
    Topics: Biology , Chemistry and Pharmacology , Medicine , Natural Sciences in General , Physics
    Notes: [Auszug] Eggs were collected from Q strain mice and Wistar rats and cultured in Whittingham?s medium5. They were prepared for aggregation using routine techniques1. Fig. 1 An eight-cell mouse egg (M) conjoined with an eight-cell rat egg (R). Of fifty-nine eight-cell rat eggs paired with mouse eggs at ...
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1038/243472a0
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  • 5
    Electronic Resource
    Electronic Resource
    Variant in sulfonylurea receptor-1 gene is associated with high insulin concentrations in non-diabetic Mexican Americans: SUR-1 gene variant and hyperinsulinemia (1998)
    Springer
    Human genetics 〈Berlin〉 103 (1998), S. 280-285 
    Details
    ISSN: 1432-1203
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology , Medicine
    Notes: Abstract The high-affinity sulfonylurea receptor (SUR1) gene regulates insulin secretion and may play a role in type 2 diabetes. A silent variant in exon 31 of SUR1 (AGG→AGA) was detected by single-strand conformational polymorphism and genotypes were determined for 396 Mexican American subjects (289 non-diabetic). The normal and mutant alleles were designated G and A, respectively. Among non-diabetics, those with the AA genotype had higher fasting insulin values than those with the AG and GG genotypes (113.4 pmol/l for AA vs 82.8 pmol/l for AG/GG, P=0.043). Similar results were observed for 2-h insulin (849.6 pmοl/l for AA vs 498.6 pmol/l for AG/GG, P=0.0003) and for the proinsulin to specific insulin ratio (0.068 for AA vs 0.056 for AG/GG, P=0.030). Specific insulin levels also differed significantly across the three genotypic classes (P=0.021). No differences in fasting glucose, body mass index, or waist circumference according to genotype were noted. Two-hour glucose was modestly higher in individuals with the AA genotype. Since we have previously reported linkage between SUR1 and hyperglycemia, the present association between a SUR1 variant and hyperinsulinemia in normal individuals from a high diabetes risk ethnic group raises the possibility of primary insulin hypersecretion as an antecedent of type 2 diabetes in at least some individuals from this population.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/s004390050817
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  • 6
    Electronic Resource
    Electronic Resource
    Formation and deexcitation of the composite nucleus in the Ni + Al reaction at 28 A·MeV (1998)
    Springer
    The European physical journal 3 (1998), S. 325-333 
    Details
    ISSN: 1434-601X
    Keywords: PACS:25.70 Pq Multifragment emission and correlations
    Source: Springer Online Journal Archives 1860-2000
    Topics: Physics
    Notes: Abstract. The formation and the deexcitation of the composite nucleus formed during the Ni + Al reaction at 28 A·MeV has been studied with the 4 π multidetector AMPHORA. A rigourous selection of the experimental data is described in order to extract a central collision sample. Then different models are compared to the data. The incomplete fusion process is in agreement with the data. The azimuthal angle correlations of He-Li and Li-Li pairs have been used to discriminate sequential or instantaneous emission. The sequential deexcitation is more consistent with all the data. The different analyses allow to describe all the characteristics of the compound nucleus and finally a fusion cross section of 300 ± 100 mbarn has been measured.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/s100500050187
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  • 7
    Electronic Resource
    Electronic Resource
    Modelling of diffraction in pillar vertical cavity surface-emitting lasers with embedded Bragg layers (1996)
    Springer
    Optical and quantum electronics 28 (1996), S. 1677-1684 
    Details
    ISSN: 1572-817X
    Source: Springer Online Journal Archives 1860-2000
    Topics: Electrical Engineering, Measurement and Control Technology , Physics
    Notes: Abstract An analytical expression for the reflectivity between the active cavity of a circular symmetric pillar vertical cavity surface-emitting laser (VCSEL) and Bragg mirror, which takes account of diffraction at the interface, is derived. The method (mode-matching in Hankel space) is also used to determine the reflectivity with some of the Bragg layers embedded in the cavity region. The dependence of reflectivity upon various parameters, including number of Bragg pairs, cavity radius and mode number, is discussed. The validity of using the plane wave reflectivity value (which ignores diffraction effects) is seen to depend significantly upon these parameters. As an indicator of the importance of taking these effects into account for pillar diameters of ∼6 μm and less, the variation of threshold gain with cavity radius is given for a commonly used type of VCSEL structure.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00331057
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  • 8
    Electronic Resource
    Electronic Resource
    A converse to the Kurosh-Ore theorem (1996)
    Springer
    Acta mathematica hungarica 70 (1996), S. 177-184 
    Details
    ISSN: 1588-2632
    Source: Springer Online Journal Archives 1860-2000
    Topics: Mathematics
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF02188203
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  • 9
    Electronic Resource
    Electronic Resource
    Wave propagation in elastic laminates using a multi-continuum theory (1972)
    Springer
    Acta mechanica 15 (1972), S. 21-38 
    Details
    ISSN: 1619-6937
    Source: Springer Online Journal Archives 1860-2000
    Topics: Mechanical Engineering, Materials Science, Production Engineering, Mining and Metallurgy, Traffic Engineering, Precision Mechanics , Physics
    Description / Table of Contents: Zusammenfassung Die in einer früheren Arbeit vorgeschlagene allgemeine Betrachtungsweise des dynamischen Verhaltens elastischer Verbundwerkstoffe wird für infinitesimale Deformationen elastischer Schichtwerkstoffe spezialisiert. Ein einfaches Verfahren zur Bestimmung der Werkstoffparameter, passend für spezielle Bestandteile, wird vorgeschlagen. Dieses Verfahren läßt sich leicht auf andere Arten von Materialien und Verbundwerkstoffen verallgemeinern. Diese Theorie wird anschließend zur Untersuchung der Ausbreitung ebener harmonischer Wellen verwendet um eine Grundlage für einen Vergleich mit anderen Methoden zu schaffen.
    Notes: Summary A general continuum approach to the dynamical behavior of elastic composites proposed in an earlier paper is specialized to infinitesimal deformations of elastic laminates. A simple procedure is proposed to evaluate the constitutive parameters appropriate to a particular choice of constituents, which is easily generalized to other types of material behavior and composite structure. The resulting theory is then used to investigate the propagation of plane harmonic waves to furnish a basis for comparison with other dynamical treatments of elastic laminates.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF01177284
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  • 10
    Electronic Resource
    Electronic Resource
    A multi-continuum theory for composite elastic materials (1972)
    Springer
    Acta mechanica 14 (1972), S. 85-102 
    Details
    ISSN: 1619-6937
    Source: Springer Online Journal Archives 1860-2000
    Topics: Mechanical Engineering, Materials Science, Production Engineering, Mining and Metallurgy, Traffic Engineering, Precision Mechanics , Physics
    Description / Table of Contents: Zusammenfassung Eine Kontinuumstheorie dev Verbundwerkstoffe wird angegeben in der die einzelnen Bestandteile durch überlagerte Kontinuen, die sich thermisch und mechanisch beeinflussen, dargestellt werden. Kinematische Begriffe, Feldgleichungen und eine Werkstofftheorie werden entwickelt einschließlich der Folgerungen aus dem Prinzip der Bezugsindifferenz und der Werkstoffsymmetrie. Das Resultat besteht aus einem System, von linearisierten Gleichungen für thermische und mechanische Prozesse in geschichteten oder faserverstärkten elastischen Verbundwerkstoffen.
    Notes: Summary A continuum theory for composite materials is presented in which the composite constituents are modeled by superimposed continua which undergo thermal and mechanical interactions. Kinematical notions, field equations and a constitutive theory are developed, including consequences of material frame indifference and material symmetry which restrict the form of the response functions. The final result is a set of linearized equations for thermal and mechanical processes in laminated or fiber reinforced composite elastic materials.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF01184851
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