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  • 1
    Electronic Resource
    Electronic Resource
    Morphological and/or functional imagiology diagnosis of epiphora (1993)
    Springer
    Documenta ophthalmologica 83 (1993), S. 337-348 
    Details
    ISSN: 1573-2622
    Keywords: Conventional subtraction macrodacryocystopraphy (CSMD) ; Digital subtraction macrodacryocystography (DSMD) ; Epiphora ; Lacrimal ducts (LD) ; Sequential dacryoscyntygraphy (SD)
    Source: Springer Online Journal Archives 1860-2000
    Topics: Medicine
    Notes: 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.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF01204336
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  • 2
    Electronic Resource
    Electronic Resource
    Effect of cyclospasmol on early diabetic retinopathy (1987)
    Springer
    International ophthalmology 10 (1987), S. 3-9 
    Details
    ISSN: 1573-2630
    Keywords: cyclospasmol ; cyclandelate ; diabetic retinopathy ; quantitative vitreous fluorophotometry
    Source: Springer Online Journal Archives 1860-2000
    Topics: Medicine
    Notes: Abstract A randomized, double-blind, placebo controlled study to investigate the long-term effect of CyclospasmolR (cyclandelate) on the abnormal permeability of the blood-retinal barrier was performed in 26 patients with insulin-dependent diabetes mellitus for at least 1 year and minimal retinopathy. Cyclospasmol 400 mg or placebo capsules were taken 4 times daily for 12 months by equal numbers in both groups. Each patient underwent a routine ophthalmoscopic examination, retinal fluorescein angiography and quantitative vitreous fluorophotometry to assess the permeability of the blood-retinal barrier just before the trial and following 6 and 12 months of therapy. Laboratory tests for determining blood and urine glucose levels and blood HbA1-levels were also carried out at these assessments. Statistically significant changes in diabetic control, in HbA1-levels or in the frequency of retinal microaneurysms could not be shown in either treatment group during the trial, nor were there any significant differences in these parameters between the two groups. Analysis of fluorophotometric data on fluorescein penetration into the left posterior vitreous demonstrated significant reductions in this parameter during the trial compared to the pretreatment level in Cyclospasmol treated diabetics. These changes in the pretreatment level after 6 and 12 months also differed significantly between the two groups. However, this statistically significant beneficial reduction in fluorescein penetration into the left posterior vitreous did not occur in the right eye in the Cyclospasmol group. In placebo treated patients a consistently deleterious trend for this parameter was observed for both eyes during the one year study. The consistently beneficial trend in the right eye following Cyclospasmol and the consistently deleterious trend in both eyes following placebo with regard to the abnormal permeability of the blood-retinal barrier of diabetics with minimal retinopathy could probably be explained by the small number of patients in both groups. No side-effects were reported.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00202775
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  • 3
    Electronic Resource
    Electronic Resource
    An ab initio study of oxygen vacancies and doping process of Nb and Cr atoms on TiO2 (110) surface models (1997)
    New York, NY : Wiley-Blackwell
    International Journal of Quantum Chemistry 65 (1997), S. 625-631 
    Details
    ISSN: 0020-7608
    Keywords: ab initio ; oxygen vacancy ; doping ; titanium oxide surface ; varistor ceramics ; Chemistry ; Theoretical, Physical and Computational Chemistry
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Notes: 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
    Additional Material: 1 Ill.
    Type of Medium: Electronic Resource
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