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  • Sequential dacryoscyntygraphy (SD)  (1)
  • ab initio  (1)
  • blood-retinal barrier  (1)
  • doping  (1)
  • 1
    Digitale Medien
    Digitale Medien
    Springer
    Documenta ophthalmologica 83 (1993), S. 337-348 
    ISSN: 1573-2622
    Schlagwort(e): Conventional subtraction macrodacryocystopraphy (CSMD) ; Digital subtraction macrodacryocystography (DSMD) ; Epiphora ; Lacrimal ducts (LD) ; Sequential dacryoscyntygraphy (SD)
    Quelle: Springer Online Journal Archives 1860-2000
    Thema: Medizin
    Notizen: Abstract Several tests and examinations are necessary for an accurate diagnosis of disorders of the lacrimal drainage system. The AA studied 100 patients with epiphora, divided in two groups. Forty patients, first group (I), aged between 4 and 78 years old (mean age 47.8 ± 9.6 years), were examined using the classical tests for the study of epiphora, sequential dacryoscintigraphy (SD) and conventional subtraction macrodacryocystrography (CSMD). In the second group (II), 60 patients (aged 45.5 ± 8.7 years) were studied using the classical tests and by digital subtraction macrodacryocystography (DSMD). The results showed that when functional epiphora is present, there is no difference between a simple clinical approach and sequential dacryoscintigraphy. However, when information is needed regarding choice of surgical approach, DSMD appears to give the best results.
    Materialart: Digitale Medien
    Bibliothek Standort Signatur Band/Heft/Jahr Verfügbarkeit
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  • 2
    Digitale Medien
    Digitale Medien
    Springer
    International ophthalmology 14 (1990), S. 81-88 
    ISSN: 1573-2630
    Schlagwort(e): calcium dobesilate ; diabetic retinopathy ; blood-retinal barrier ; vitreous fluorophotometry ; penetration ratio
    Quelle: Springer Online Journal Archives 1860-2000
    Thema: Medizin
    Notizen: Summary The effect of calcium dobesilate on the alteration of the blood-retinal barrier was studied in 41 adult-onset, non-insulin dependent diabetic patients with minimal or no retinopathy, randomly assigned to receive either oral calcium dobesilate (1000 mg twice daily) or a placebo for 12 months. The posterior vitreous value and the penetration ratio, determined by vitreous fluorophotometry, reflected stabilisation of blood-retinal barrier permeability in the calcium dobesilate patients and deterioration of blood retinal barrier in those given placebo. During the relatively short period of the study, one year, no significant change in microaneurysm and capillary closure gradings was observed. No side effects were associated with calcium dobesilate.
    Materialart: Digitale Medien
    Bibliothek Standort Signatur Band/Heft/Jahr Verfügbarkeit
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  • 3
    Digitale Medien
    Digitale Medien
    New York, NY : Wiley-Blackwell
    International Journal of Quantum Chemistry 65 (1997), S. 625-631 
    ISSN: 0020-7608
    Schlagwort(e): ab initio ; oxygen vacancy ; doping ; titanium oxide surface ; varistor ceramics ; Chemistry ; Theoretical, Physical and Computational Chemistry
    Quelle: Wiley InterScience Backfile Collection 1832-2000
    Thema: Chemie und Pharmazie
    Notizen: We theoretically investigated how the formation of oxygen vacancies and the addition of niobium and chromium atoms as dopants modify the varistor properties of TiO2. The calculations were carried out at the HF level using a contracted basis set, developed by Huzinaga et al., to represent the atomic centers on the (110) surface for the large (TiO2)15 cluster model. The change of the values for the net atomic charges and band gap after oxygen vacancy formation and the presence of dopants in the lattice are analyzed and discussed. It is shown that the formation of oxygen vacancies decreases the band gap while an opposite effect is found when dopants are located in the reduced surface. The theoretical results are compared with available experimental data. A plausible explanation of the varistor behavior of this system is proposed.   © 1997 John Wiley & Sons, Inc. Int J Quant Chem 65: 625-631, 1997
    Zusätzliches Material: 1 Ill.
    Materialart: Digitale Medien
    Bibliothek Standort Signatur Band/Heft/Jahr Verfügbarkeit
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