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  • 1
    Electronic Resource
    Electronic Resource
    Antibodies to hen and duck antigens in poultry workers (1984)
    Oxford, UK : Blackwell Publishing Ltd
    Clinical & experimental allergy 14 (1984), S. 0 
    Details
    ISSN: 1365-2222
    Source: Blackwell Publishing Journal Backfiles 1879-2005
    Topics: Medicine
    Notes: Serum antibodies to avian and Aspergillus antigens were detected by enzyme-linked immunosorbent assays (ELISA) in forty-two workers from a poultry abattoir and in twenty healthy blood donors. The levels of IgG and IgA antibodies to hen and duck serum were significantly higher in poultry workers than in blood donors (P〈0.01). In workers employed for less than 1 year the antibody levels were lower than in those who had been employed for a longer period of time (P〈0.05). The IgA antibody level to a high molecular weight Aspergillus antigen was higher in poultry workers than blood donors (P〈0-05), whereas the level of other Aspergillus antibodies were similar in the two groups. The level of IgG antibodies to hen antigen was higher in non-smokers than in smokers (P〈0-02). A correlation between the antibody levels to hen and duck antigens and to pigeon antigen was found (P〈0.05). indicating cross-reactivity between these antibodies. No cases of allergic alveolitis were found, and no correlation between antibody levels and respiratory symptoms could be demonstrated.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1111/j.1365-2222.1984.tb02225.x
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  • 2
    Electronic Resource
    Electronic Resource
    Simulation of a Neuronal Network operating Rhythmically through Recurrent Inhibition (1964)
    [s.l.] : Nature Publishing Group
    Nature 204 (1964), S. 289-290 
    Details
    ISSN: 1476-4687
    Source: Nature Archives 1869 - 2009
    Topics: Biology , Chemistry and Pharmacology , Medicine , Natural Sciences in General , Physics
    Notes: [Auszug] The theory has been tested by simulation of a neuronal network on a digital computer, IBM 1620. Eighty neurones were made to discharge randomly, all at a given probability of firing (PF) (Fig. IA). Following the discharge of any cell, up to five other neurones were subjected to a drop of their PF ...
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1038/204289a0
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  • 3
    Electronic Resource
    Electronic Resource
    Inhibitory Phasing of Neuronal Discharge (1962)
    [s.l.] : Nature Publishing Group
    Nature 196 (1962), S. 645-647 
    Details
    ISSN: 1476-4687
    Source: Nature Archives 1869 - 2009
    Topics: Biology , Chemistry and Pharmacology , Medicine , Natural Sciences in General , Physics
    Notes: [Auszug] SEVERAL large aggregations of neurones in the central nervous system exhibit a tendency to synchronize responses which recur at relatively slow frequencies. The best-known example is the alpha rhythm which occurs in various areas of the cerebral cortex, neuronal discharges tending to occur in phase ...
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1038/196645a0
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  • 4
    Electronic Resource
    Electronic Resource
    Hippocampus of the Brain: Recurrent Inhibition in the Hippocampus with Identification of the Inhibitory Cell and its Synapses (1963)
    [s.l.] : Nature Publishing Group
    Nature 198 (1963), S. 540-542 
    Details
    ISSN: 1476-4687
    Source: Nature Archives 1869 - 2009
    Topics: Biology , Chemistry and Pharmacology , Medicine , Natural Sciences in General , Physics
    Notes: [Auszug] IN an investigation of cortical functions the simple structure of the hippocampus offers great advantages1 over other cortical regions, particularly as its detailed histology is better known2-5. A special feature of the hippocampal cortex is that, within a given area, the fibres of a certain ...
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1038/198540a0
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  • 5
    Electronic Resource
    Electronic Resource
    Inhibitory Synapses on Somas of Purkinje Cells in the Cerebellum (1963)
    [s.l.] : Nature Publishing Group
    Nature 199 (1963), S. 655-656 
    Details
    ISSN: 1476-4687
    Source: Nature Archives 1869 - 2009
    Topics: Biology , Chemistry and Pharmacology , Medicine , Natural Sciences in General , Physics
    Notes: [Auszug] IN the hippocampal cortex a very powerful postsynaptic inhibition is produced by synapses concentrated on the sonias of the pyramidal cells; hence it has been concluded that these synapses belong to the basket cells, which have extensive axon ramifications that terminate exclusively on the cell ...
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1038/199655a0
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  • 6
    Electronic Resource
    Electronic Resource
    Presynaptic Inhibitory Actions: Presynaptic Inhibition in the Cuneate Nucleus (1962)
    [s.l.] : Nature Publishing Group
    Nature 194 (1962), S. 741-743 
    Details
    ISSN: 1476-4687
    Source: Nature Archives 1869 - 2009
    Topics: Biology , Chemistry and Pharmacology , Medicine , Natural Sciences in General , Physics
    Notes: [Auszug] IN the pathway from cutaneous nerves to the sensory cortex a conditioning volley is followed by a deep and prolonged (about 150 msec.) depression of the primary cortical response evoked by a testing volley in the same nerve or in another nerve of that limb1-4. Much of the depression has been shown ...
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1038/194741a0
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  • 7
    Electronic Resource
    Electronic Resource
    Acetylcholine: a Central Transmitter? (1962)
    [s.l.] : Nature Publishing Group
    Nature 195 (1962), S. 1105-1106 
    Details
    ISSN: 1476-4687
    Source: Nature Archives 1869 - 2009
    Topics: Biology , Chemistry and Pharmacology , Medicine , Natural Sciences in General , Physics
    Notes: [Auszug] This communication is concerned with the excitatory effect of acetylcholine on neurones in the ventrobasal complex of the thalamus of cats anaesthetized with sodium pentobarbital. Extracellular action potentials (0-2-1-0 mV) were recorded by means of the central barrel of five-barrel ...
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1038/1951105a0
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  • 8
    Electronic Resource
    Electronic Resource
    On universal 22 (1982)
    Cambridge : Cambridge University Press
    Journal of linguistics 18 (1982), S. 231-243 
    Details
    ISSN: 0022-2267
    Source: Cambridge Journals Digital Archives
    Topics: Linguistics and Literary Studies
    Notes: Greenberg's pioneering work on word order universals (Greenberg, 1966) in which he proposed a total of universals concerning the ‘order of meaningful elements’ as well as a typology based on this order distinguishing 24 language types has truly had a great influence on linguistic research in the past few years. Not only has this important contribution to our understanding of language universals and typology precipitated such widespread interest in this particular field of linguistics which has culminated in a number of language specific monographs (see for instance Heine, 1976; Lehmann, 1974; Friedrich, 1975); symposia (see Li, 1975, 1976, 1977) and even larger projects (for example the Language Universals Project of Stanford University, and the Cologne project on language universals, see Greenberg, 1978; Seiler, 1973, 1978), but it also has influenced linguistics in general to such an extent that many consider syntactic description and research to be incomplete without a thorough discussion of word order, in some cases to the virtual exclusion of other topics.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1017/S0022226700013591
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  • 9
    Electronic Resource
    Electronic Resource
    Effect of root anaerobiosis on the water relations of several Pyrus species (1984)
    Oxford, UK : Blackwell Publishing Ltd
    Physiologia plantarum 62 (1984), S. 0 
    Details
    ISSN: 1399-3054
    Source: Blackwell Publishing Journal Backfiles 1879-2005
    Topics: Biology
    Notes: Solution culture experiments were designed to investigate the plant water relations of 3 Pyrus species subjected to root anaerobiosis. Root anaerobiosis induced partial stomatal closure prior to alterations in leaf water potential (ΨLW) or root osmotic potential (ΨRπ). In contrast, stomatal closure was accompanied by a decline in root hydraulic conductivity (Lp). Anoxia markedly reduced ΨLW for Pyrus communis L. and eventually led to wilting and defoliation. Pyrus betulaefolia Bunge and Pyrus calleryana Decne, however, were less affected by root anaerobiosis. To delineate if the increased root resistance was in the radial or longitudinal direction, 10−4M cistrans abscisic acid (ABA) was added to detopped root systems of P. communis in solution culture after steady-state rates of Lp were established. A consistent 25 to 30% promotion of Lp was observed 1.5 h after the addition of ABA for aerobically treated plants. ABA did not influence Lp when applied to roots previously deprived of O2 for 4 days. Additional evidence against the limiting resistance being in the radial direction was obtained when water fluxes were compared through intact P. communis roots, roots with all feeder roots detached, and stems without root systems. Severing feeder roots from anaerobically treated plants did not increase water flux to rates observed for aerobically treated plants. Resistance progressed basipetally to eventually encompass the stem itself. These results can only be explained by occlusion of the xylem vessels.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1111/j.1399-3054.1984.tb00378.x
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  • 10
    Electronic Resource
    Electronic Resource
    Water and ion fluxes of abscisic acid-treated root systems of pear, Pyrus communis (1984)
    Oxford, UK : Blackwell Publishing Ltd
    Physiologia plantarum 60 (1984), S. 0 
    Details
    ISSN: 1399-3054
    Source: Blackwell Publishing Journal Backfiles 1879-2005
    Topics: Biology
    Notes: Water and ion fluxes of intact root systems of Pyrus communis L. cv. Old Home × Farmingdale 97 immersed in a nutrient solution were determined at various pressures and temperatures. Water flux (Jv was normalized on the basis of initial flow rates of a root system after 30 min at 0.50 MPa and 25°C, expressed as the ratio Qv. Qv responded linearly to pressures between 0.20 and 0.62 MPa, implying a constant root hydraulic conductivity (Lp) within this range. Similarly Qv was linearly related to temperatures between 7 and 35°C; however, large, rapid temperature changes resulted in a break of the Arrhenius plot of Qv versus the reciprocal of temperature, Abscisic acid (ABA) from 2 × 10−6 to 10−4M, applied to intact root systems, increased Qv within 10–20 min, with the effect leveling off after 1.5 h. At a pressure of 0.50 MPa, ABA at 10-4M enhanced Qv by 28%. The stimulation of Qv was not due to the ethanol solvent since 0.13 or 1.33% ethanol decreased Qv-, The osmotic potential of the xylem fluid was determined and was used to calculate total normalized solute flux. The results suggest that ABA-induced or ethano1-induced changes in Qv were mainly due to changes in Lp and not to changes in ion transport to the xylem.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1111/j.1399-3054.1984.tb04555.x
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