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  • 1
    Electronic Resource
    Electronic Resource
    [S.l.] : American Institute of Physics (AIP)
    Journal of Applied Physics 87 (2000), S. 1153-1158 
    ISSN: 1089-7550
    Source: AIP Digital Archive
    Topics: Physics
    Notes: Mobility of sodium in SrS-based electroluminescent thin film stacks grown by atomic layer epitaxy was studied in the temperature range 600–850 °C using ion implantation for doping and nuclear resonance broadening for profiling of sodium. The crystallinity and orientation of SrS and SrS:Ce films were studied using wide angle x-ray scattering (WAXS). It was found that sodium diffuses rapidly to the interfaces between SrS and upper and lower Al2O3 insulators. These insulators act effectively as diffusion barriers for sodium up to a temperature of about 700 °C. In the case of SrS:Ce films, even after annealing at high temperatures for long times, the Na concentration in the bulk of the film remained in the range 0.4–0.6 at. % which is about two to three times the concentration of Ce. WAXS measurements revealed the preferred [111] orientation of SrS and SrS:Ce films with an average size of crystallites ≥120 nm. It turned out that annealing for a few hours at about 700–750 °C was needed to recover the implantation damage and restore the crystallinity of SrS to its original level. © 2000 American Institute of Physics.
    Type of Medium: Electronic Resource
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  • 2
    Electronic Resource
    Electronic Resource
    Amsterdam : Elsevier
    Journal of Thermal Biology 19 (1994), S. 321-325 
    ISSN: 0306-4565
    Keywords: Brown bear ; hibernation induction trigger ; winter sleep
    Source: Elsevier Journal Backfiles on ScienceDirect 1907 - 2002
    Topics: Biology
    Type of Medium: Electronic Resource
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  • 3
    ISSN: 1662-9752
    Source: Scientific.Net: Materials Science & Technology / Trans Tech Publications Archiv 1984-2008
    Topics: Mechanical Engineering, Materials Science, Production Engineering, Mining and Metallurgy, Traffic Engineering, Precision Mechanics
    Type of Medium: Electronic Resource
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  • 4
    Electronic Resource
    Electronic Resource
    Springer
    Archives of orthopaedic and trauma surgery 120 (2000), S. 448-451 
    ISSN: 1434-3916
    Source: Springer Online Journal Archives 1860-2000
    Topics: Medicine
    Notes: Abstract The aim of this study is to compare the results of non-operative and anterior operative treatment of cervical burst and flexion teardrop fractures. Sixty-nine consecutive patients treated during 1980 to 1995 were reviewed retrospectively. Thirty-four of them had been treated with skull traction or halo-vest and 35 with anterior decompression, bone grafting and fixation by an anterior Caspar plate. Neurological functioning on admission and at the end of the follow-up was assessed by using Frankel’s classification. Kyphosis and spinal canal encroachment by retropulsed fragments were measured radiographically. Operatively treated patients recovered more often with at least one Frankel grade (P = 0.027) and presented less narrowing of the spinal canal (P = 0.0006) and kyphotic deformity (P = 0.00003) at the end of the follow-up. In comparison with the conservative methods, the operative Caspar technique provided superior decompression and fixation as well as promoted the healing of cord injuries caused by burst and flexion teardrop fractures.
    Type of Medium: Electronic Resource
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  • 5
    ISSN: 1432-119X
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology , Medicine
    Notes: Summary Receptor-bound hCG was localized in pseudopregnant rat ovarian cells at semiultrastructural level with the peroxidase-antiperoxidase (PAP) complex method. The animals received 2, 6, 12 or 24 h prior to killing a single intravenous injection of hCG and the hormone was localized in the 5-μm paraffin sections and in the 1-μm epon sections using the pre-embedding technique. The peroxidase staining localized to the periphery of the luteal and interstitial glandular cells. No significant staining occurred in the intracellular structures of the cells during the 24-h observation period. However, the appearance of staining in the subplasmalemmal structures can not be excluded. These results are compatible with the previous observations that the receptor-hCG complexes are primarily formed at the surface of the luteal and interstitial glandular cells.
    Type of Medium: Electronic Resource
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  • 6
    ISSN: 1432-5195
    Source: Springer Online Journal Archives 1860-2000
    Topics: Medicine
    Description / Table of Contents: Résumé On a comparé les résultats immédiats et tardifs obtenus chez 42 patients traités de 1976 à 1985 par plaques de Williams ou par tiges de Harrington. Il n'y a pas eu de différence significative entre les deux groupes quant au type et au degré de la fracture ainsi qu'à la déformation initiale d'une part et aux soins post-opératoires d'autre part. Le matériel a été enlevé 13 à 19 mois après l'intervention. L'analyse statistique a été effectuée en mesurant 13 paramètres concernant l'anatomie vertébrale, la réduction du rachis et le maintien du résultat pendant une longue période de surveillance (7.6 ans en moyenne pour le groupe Williams et 4 ans pour le groupe Harrington). La réduction du tassement antérieur obtenue par l'appareil de Harrington a été nettement supérieure à celle obtenue par la technique de Williams. Cependant, la perte de correction des déformations vertébrales, tout particulièrement celle de la cyphose, a été au cours de l'évolution presque identique dans les deux groupes. Certains facteurs opératoires techniques jouant en faveur du groupe Harrington, la supériorité des résultats obtenus dans ce groupe aurait du être plus nette que ne l'a montré l'évaluation finale. Les résultats finaux se ressemblent tellement que, si l'on prend en compte le devenir à long terme, il devient difficile d'affirmer la supériorité de l'instrumentation de Harrington par rapport aux plaques de Williams. Ces deux techniques, n'agissant que par voie postérieure, ne sont pas capables de maintenir une correction permanente de la déformation du rachis. Pour en prévenir la reproduction, on devrait s'orienter vers la reconstruction de la partie antérieure des vertèbres.
    Notes: Summary Two similar groups of patients with unstable fractures and fracture dislocations of the thoracic or lumbar spine have been treated with the posterior application of Williams plates or Harrington distraction rods over a period of 10 years. The instrumentation was routinely removed from 13 to 19 months after insertion. The initial preoperative kyphotic angle was corrected by a mean of 4.5 and 6.9° respectively. However, follow up after a minimum of four years has shown a loss of correction by a mean of 14.4 and 12.7° to an angle of 21.9° even in the Harrington rod cases. These results do not show the ability to maintain correction of deformity by either method with a dorsal approach. Reduction and stabilization of fractures of the spine should be directed to the anterior part of the vertebrae to overcome late deformity of the spine.
    Type of Medium: Electronic Resource
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  • 7
    ISSN: 1432-2242
    Keywords: Key words Scots pine ; Molecular markers ; Isozymes ; Population structure ; Adaptive genetic variation
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology
    Notes: Abstract We have examined patterns of variation of several kinds of molecular markers (isozymes, RFLPs of ribosomal DNA and anonymous low-copy number DNA, RAPDs and microsatellites) and an adaptive trait [date of bud set in Scots pine (Pinus sylvestris L.)]. The study included Finnish Scots pine populations (from latitude 60°N to 70°N) which experience a steep climatic gradient. Common garden experiments show that these populations are adapted to the location of their origin and genetically differentiated in adaptive quantitative traits, e.g. the date of bud set in first-year seedlings. In the northernmost population, bud set took place about 21 days earlier than in the southernmost population. Of the total variation in bud set, 36.4% was found among the populations. All molecular markers showed high levels of within-population variation, while differentiation among populations was low. Among all the studied markers, microsatellites were the most variable (H–=0.77). Differences between populations were small, GST was less than 0.02. Our study suggests that molecular markers may be poor predictors of the population differentiation of quantitative traits in Scots pine, as exemplified here by bud-set date.
    Type of Medium: Electronic Resource
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  • 8
    ISSN: 1432-2242
    Keywords: Scots pine ; Molecular markers ; Isozymes ; Population structure ; Adaptive genetic variation
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology
    Notes: Abstract We have examined patterns of variation of several kinds of molecular markers (isozymes, RFLPs of ribosomal DNA and anonymous low-copy number DNA, RAPDs and microsatellites) and an adaptive trait [date of bud set in Scots pine (Pinus sylvestris L.)]. The study included Finnish Scots pine populations (from latitude 60°N to 70°N) which experience a steep climatic gradient. Common garden experiments show that these populations are adapted to the location of their origin and genetically differentiated in adaptive quantitative traits, e.g. the date of bud set in first-year seedlings. In the northernmost population, bud set took place about 21 days earlier than in the southernmost population. Of the total variation in bud set, 36.4% was found among the populations. All molecular markers showed high levels of within-population variation, while differentiation among populations was low. Among all the studied markers, microsatellites were the most variable (He=0.77). Differences between populations were small, GST was less than 0.02. Our study suggests that molecular markers may be poor predictors of the population differentiation of quantitative traits in Scots pine, as exemplified here by bud-set date.
    Type of Medium: Electronic Resource
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  • 9
    Electronic Resource
    Electronic Resource
    Springer
    European archives of oto-rhino-laryngology and head & neck 222 (1979), S. 85-89 
    ISSN: 1434-4726
    Keywords: Synthetic speech ; Portable speech synthesizer ; Compressed speech test ; Synthesized speech test ; Speech device for the mute
    Source: Springer Online Journal Archives 1860-2000
    Topics: Medicine
    Notes: Summary A preliminary report on speech test results with a portable, text-tospeech synthesizer is presented. The differentiation scores achieved at speed 80 words/min vary. So far the best mean differentiation scores in normal material are 75%. The increase of the presentation level improves the differentiation score, as does the decrease of word speed and training. The future and present uses of this system are discussed. These include: devices for the handicapped, e.g. to produce speech for the mute, man-machine communication through speech in industry control, data processing systems and uses in audiological diagnostics. The study is continued.
    Type of Medium: Electronic Resource
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