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  • Electronic Resource  (33)
  • 1985-1989  (18)
  • 1980-1984  (11)
  • 1970-1974  (4)
  • 1
    Electronic Resource
    Electronic Resource
    Diffusion of ion-implanted Sn and Sb in heavily doped n-type silicon (1988)
    Woodbury, NY : American Institute of Physics (AIP)
    Applied Physics Letters 53 (1988), S. 755-757 
    Details
    ISSN: 1077-3118
    Source: AIP Digital Archive
    Topics: Physics
    Notes: The diffusion of ion-implanted Sn and Sb in silicon single crystals during rapid thermal annealing at 1000 and 1050 °C has been studied as a function of P donor concentration. For extrinsic/intrinsic carrier concentration ratios (n/ni )≥20, almost identical, extremely large diffusion coefficients are found for both impurities. The diffusion coefficients exhibit approximately an (n/ni )4 dependence. The onset of this dependence is accompanied by the appearance of a new defect-complex type containing Sb or Sn, respectively.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1063/1.99823
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    Paper (German National Licenses)
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  • 2
    Electronic Resource
    Electronic Resource
    Properties of sputtered superconducting films of Bi2Sr2CaCu2Ox made by low-temperature in situ growth (1989)
    Woodbury, NY : American Institute of Physics (AIP)
    Applied Physics Letters 55 (1989), S. 2135-2137 
    Details
    ISSN: 1077-3118
    Source: AIP Digital Archive
    Topics: Physics
    Notes: Superconducting films of Bi2Sr2CaCu2Ox have been fabricated on single-crystal MgO substrates by a low-temperature in situ process. Using a substrate temperature Ts≈645 °C, metallic films with a superconducting onset of 90–100 K and an extrapolated Tc0=56 K have been obtained. X-ray diffraction shows the films to be c-axis oriented. Electron microscopy reveals that the films are not significantly smoother than films which were post-annealed at 865 °C, and that some segregation into nonsuperconducting phases had occurred. The exact mechanism by which crystallization and superconductivity occurs at such low temperatures is not yet known, but it can be speculated that the surface atoms are less constrained and thus have a smaller energy barrier to overcome in forming a crystal structure.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1063/1.102347
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    Paper (German National Licenses)
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  • 3
    Electronic Resource
    Electronic Resource
    Occurrence of Aspergillus umbrosus Antibodies in Danish Farmers (1986)
    Oxford, UK : Blackwell Publishing Ltd
    Allergy 41 (1986), S. 0 
    Details
    ISSN: 1398-9995
    Source: Blackwell Publishing Journal Backfiles 1879-2005
    Topics: Medicine
    Notes: Antibodies to Aspergillus umbrosus were investigated in 181 Danish farmers, 137 farmers spouses and a control group of 104 male blood donors with no relation to farming. By enzyme-linked immunosorbent assay (ELISA) higher levels of IgG antibodies were found in farmers than in their spouses and in non-farming controls (P 〈 0.0001). By double immunodiffusion precipitating antibodies occurred in 11 farmers, in none of farmers' spouses and in one control subject. Farmers and farmers' spouses who were non-smokers had higher IgG antibody levels than smokers in the same groups (P 〈 0.04). Farmers more than 30 years of age had higher IgG antibody levels than younger farmers (P 〈 0.04). Farmers rearing cattle tended to have higher IgG antibody levels than farmers without cattle. No correlation between antibody levels and respiratory symptoms or lung function parameters (FEV1 or FVC) could be demonstrated.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1111/j.1398-9995.1986.tb00285.x
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  • 4
    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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  • 5
    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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  • 6
    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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  • 7
    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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  • 8
    Electronic Resource
    Electronic Resource
    A precise multipass method for satellite Doppler positioning (1988)
    Springer
    Celestial mechanics and dynamical astronomy 44 (1988), S. 317-338 
    Details
    ISSN: 1572-9478
    Source: Springer Online Journal Archives 1860-2000
    Topics: Physics
    Notes: Abstract A precise and efficient algorithm is developed for determining the locations of radio beacons (e.g. of the ARGOS or COSPAS/SARSAT type) based on Doppler shift measurements in overflying satellites. The method distinguishes itself through: (1) the use of a very compact analytic orbital theory valid for all eccentricities, (2) autonomous orbit improvement based on Doppler data for one or more local reference beacons accessible at a single LUT, (3) simultaneous orbit improvement and calculation of beacon coordinates for an arbitrary number of satellites, satellite passes, and beacons, and (4) very efficient semi-analytic matrix inversion by partitioning into global, semi-global, and local parameters. The algorithm has been implemented in a FORTRAN program which can be run on a PC. Error statistics are presented from applications of the program to a large number of actual Doppler curves obtained with the ARGOS and COSPAS/SARSAT systems.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF01234271
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  • 9
    Electronic Resource
    Electronic Resource
    Reversibility of cortical hyperostosis following long-term prostaglandin E1 therapy in infants with ductus-dependent congenital heart disease (1988)
    Springer
    Pediatric radiology 18 (1988), S. 149-153 
    Details
    ISSN: 1432-1998
    Source: Springer Online Journal Archives 1860-2000
    Topics: Medicine
    Notes: Abstract Two neonates with complex cyanotic congenital heart disease, receiving long-term prostaglandin E1 infusion, for 59 and 78 days respectively, demonstrated significant radiographic changes of symmetric cortical hyperostosis of the long bones. Bone biopsies from one of the patients elucidated the histological changes and serial X-rays revealed regression of the hyperostosis. Long-term follow-up after 13 months did not reveal any late bony changes or growth disturbance.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF02387559
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  • 10
    Electronic Resource
    Electronic Resource
    Intrinsic asthma and bacterial histamine release (1982)
    Springer
    Inflammation research 12 (1982), S. 101-102 
    Details
    ISSN: 1420-908X
    Source: Springer Online Journal Archives 1860-2000
    Topics: Medicine
    Notes: Abstract In this study of intrinsic asthma (IA) in children the pathogenic role of bacteria in respiratory disease was elucidated by a basophil histamine liberation technique. Several strains of bacteria caused release of histamine from peripheral leukocytesin vitro. Normal, non-infectious and non-atopic children frequently responded in a similar fashion, although positive responses were less frequent. It seems that two different mechanisms of bacterial histamine release exist: interaction with the basophil-bound IgE and a direct interaction with the cell surface. It is suggested that the histamine release takes place only in the lung of IA patients, where a defective pulmonary barrier could permit the bacteria to enter, but not in healthy individuals.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF01965116
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