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  • Artikel: DFG Deutsche Nationallizenzen  (5)
  • 1995-1999  (5)
  • 1999  (5)
Datenquelle
  • Artikel: DFG Deutsche Nationallizenzen  (5)
Materialart
Erscheinungszeitraum
  • 1995-1999  (5)
Jahr
  • 1
    ISSN: 1432-1920
    Schlagwort(e): Key words Magnetic resonance angiography ; Ageing
    Quelle: Springer Online Journal Archives 1860-2000
    Thema: Medizin
    Notizen: Abstract We investigated age-related changes in the visibility of intracranial arteries on magnetic resonance angiography (MRA) and the influence of risk factors for stroke. We studied 230 adult patients without specific neurological deficits. MRA was performed using the three-dimensional time-of-flight technique with a spoiled gradient-recalled acquisition sequence. We classified internal carotid artery (IC) and the horizontal (M1) and distal (beyond M2) middle cerebral segments into 4 grades. Linear regression revealed a significant negative relation between age and the quality of demonstration on MRA. For IC and M1, the score was significantly lower in subjects with risk factors than in those without. The distal MCA was poorly seen in patients without a history of hypertension or lacunar infarcts. A marked correlation was observed between visibility and age patients with no history of hypertension, diabetes mellitus and hyperlipidaemia. We suggest that atherosclerotic change and decline in flow velocity with normal ageing are factors leading to decreased visibility on MRA.
    Materialart: Digitale Medien
    Bibliothek Standort Signatur Band/Heft/Jahr Verfügbarkeit
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  • 2
    Digitale Medien
    Digitale Medien
    Springer
    Archives of virology 144 (1999), S. 879-892 
    ISSN: 1432-8798
    Quelle: Springer Online Journal Archives 1860-2000
    Thema: Medizin
    Notizen: Summary.  About half of Japanese isolates of beet necrotic yellow vein virus (BNYVV) were found to contain RNA 5 molecules, which were also detected in virus isolates from China and France. Sequence comparisons of RNA 5 (nucleotides 327 to 1171) in 25 isolates showed that there are up to 8% sequence differences, and that RNA 5 variants fall into three groups: group I contains most of the Japanese and Chinese isolates, group II two Japanese isolates, and group III four French isolates. The group I isolates fall into three small clusters. In the 26 kDa coding region of RNA 5, there was a maximum of 1.5% nucleotide sequence differences (6 amino acid changes) within the group and 8.4% nucleotide sequence differences (17 amino acid changes) between the groups. Comparisons of the coat protein gene of RNA 2 revealed that most of the Japanese and Chinese isolates belonged to the A type strain, but some isolates were of the B type. The French isolates (P type) were closely related to those of the A type. Mixed infections of the two types of virus and the two groups of RNA 5 were detected in a small area of Hokkaido. BNYVV might have been introduced into Japan and China by a similar route from at least two origins. These results, together with other evidence, suggest that the three groups of RNA 5 variants separated from an original population a long time ago and, thereafter, the group I population diverged further into three clusters, which may have been associated with the A type strain rather than the B type.
    Materialart: Digitale Medien
    Bibliothek Standort Signatur Band/Heft/Jahr Verfügbarkeit
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  • 3
    Digitale Medien
    Digitale Medien
    Springer
    European journal of pediatrics 158 (1999), S. 872-873 
    ISSN: 1432-1076
    Quelle: Springer Online Journal Archives 1860-2000
    Thema: Medizin
    Materialart: Digitale Medien
    Bibliothek Standort Signatur Band/Heft/Jahr Verfügbarkeit
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  • 4
    Digitale Medien
    Digitale Medien
    Springer
    International urogynecology journal 10 (1999), S. 182-187 
    ISSN: 1433-3023
    Schlagwort(e): Key words:Intrinsic sphincter deficiency – Loop length – Sling operation – Stress incontinence – Urethral hypermobility
    Quelle: Springer Online Journal Archives 1860-2000
    Thema: Medizin
    Notizen: Abstract: Fifty-four women with stress incontinence underwent a vaginal nylon sling procedure. Of these, 15 were diagnosed as having type I, 27 as type II, and 12 as type III genuine stress incontinence. Follow-up averaged 25 months (range 6–42). The total suture length prior to ligation, which supports the bladder neck with no tension, varied from 200 to 313 mm and demonstrated weak correlation with body mass index (R2= 0.076, P = 0.043) and body weight (R2= 0.082, P = 0.036). The objective success rate was 89% (48 of 54 patients) 25 months later; the subjective rate was 93% (50 of 54 patients). Kaplan–Meier analysis demonstrated that the cumulative continence rate was 85.6% at 42 months for those with type I, 88.4% at 42 months for those with type II, and 91.7% at 40 months for those with type III incontinence (P〉0.05). The main postoperative complication was retention or difficulty in urination. It was concluded that the total suture length cannot be determined in relation to patient’s physical parameters, but rather on surgical experience, and that this operation is recommended to those with not only intrinsic sphincter deficiency but also with urethral hypermobility, provided surgery is executed with safe precautions.
    Materialart: Digitale Medien
    Bibliothek Standort Signatur Band/Heft/Jahr Verfügbarkeit
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  • 5
    ISSN: 1434-6079
    Schlagwort(e): PACS: 36.40.-c Atomic and molecular clusters
    Quelle: Springer Online Journal Archives 1860-2000
    Thema: Physik
    Notizen: Abstract. Oxide film formation using high-intensity oxygen cluster ion beams has been developed. This deposition process uses large cluster ions, which can transport thousands of atoms per ion with very low energy per constituent atom. As a result, the interactions between the cluster and substrate atoms occur in the near-surface region, and cluster ions can deposit their energy with a high density in a very localized surface region. Enhancement of the oxidation reactions is clearly demonstrated. High-quality tin-doped indium-oxide (ITO) films, which are widely used in electrical and optical devices, are formed. Very smooth, highly transparent (〉80%) and low-resistivity (〈4×10-4 Ω cm, which are the lowest values for films grown at room temperature) films, were obtained by the use of a 7 keV oxygen cluster ion beam. The energetic oxygen clusters collapsed at the surface and reacted with the metal atoms, and about 10% of them were incorporated when the kinetic energy of the cluster ion was above 5 keV. Oxidation reaction can be enhanced by energetic cluster ion bombardment, which offers a new technique for ion-assisted thin-film formation.
    Materialart: Digitale Medien
    Bibliothek Standort Signatur Band/Heft/Jahr Verfügbarkeit
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