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  • 1
    Electronic Resource
    Electronic Resource
    Feasibility of a limiting D mechanism for complex formation and ligand substitution reactions of pentacyanoferrate(II) (1992)
    s.l. : American Chemical Society
    Inorganic chemistry 31 (1992), S. 5480-5483 
    Details
    ISSN: 1520-510X
    Source: ACS Legacy Archives
    Topics: Chemistry and Pharmacology
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1021/ic00052a025
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  • 2
    Electronic Resource
    Electronic Resource
    Is the oxidation of L-ascorbic acid by aquated iron(III) ions in acidic aqueous solution substitution- or electron-transfer-controlled? A combined chloride, pH, temperature, and pressure dependence study (1991)
    s.l. : American Chemical Society
    Inorganic chemistry 30 (1991), S. 4555-4559 
    Details
    ISSN: 1520-510X
    Source: ACS Legacy Archives
    Topics: Chemistry and Pharmacology
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1021/ic00024a018
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  • 3
    Electronic Resource
    Electronic Resource
    Analysis of a workplace air particulate sample by synchronous luminescence and room-temperature phosphorescence (1981)
    s.l. : American Chemical Society
    Analytical chemistry 53 (1981), S. 253-258 
    Details
    ISSN: 1520-6882
    Source: ACS Legacy Archives
    Topics: Chemistry and Pharmacology
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1021/ac00225a030
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  • 4
    Electronic Resource
    Electronic Resource
    Supraependymal cell clusters in the rat hypothalamus (1983)
    Springer
    Anatomy and embryology 168 (1983), S. 371-393 
    Details
    ISSN: 1432-0568
    Keywords: Supraependymal cell clusters ; Median eminence ; Ventricular system ; Hypothalamus ; rat-GFA staining
    Source: Springer Online Journal Archives 1860-2000
    Topics: Medicine
    Notes: Summary The fine structure of supraependymal cell clusters of the median eminence was studied with TEM. The cluster cells were identified on the basis of ultrastructure and histochemical determination of glial fibrillar acidic protein (GFA). The phagocytic properties were also studied by means of intraventricular injections of HRP. Neurons, neuroglia cells and degenerating ependyma- and glial cells were found. The extrusion of degenerating infundibular elements into the ventricle is a constant phenomenon but its precise localization and intensity are variable. The close proximity of the clusters to capillary loops is stressed. Because of the broken ependyma at the neck of the cluster, the permeability of the infundibular lining for HRP is increased. Clusters may be seen as sites lacking a brain-CSF barrier.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00304275
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  • 5
    Electronic Resource
    Electronic Resource
    The fine structure of the ependymal surface of the recessus infundibularis in the rat (1977)
    Springer
    Anatomy and embryology 151 (1977), S. 241-265 
    Details
    ISSN: 1432-0568
    Keywords: Scanning E.M. ; Third ventricle ; Neurohypophysis ; Rat
    Source: Springer Online Journal Archives 1860-2000
    Topics: Medicine
    Notes: Summary The surface of the recessus infundibularis of the third ventricle has been studied with the scanning and transmission technique in normal and experimental material. Surface specializations such as microvilli, craters and areas of discontinuous lining are described. Supraependymal cells and fibres have been found; some of these cells form wide-meshed networks. The supraependymal fibres may be regular or varicose; the former seem to perforate the ependyma. With the transmission electron microscope the supraependymal cells are divided into three categories: nerve cells, lymphocytes and “dense cells”. Two fibre populations are distinguished: thin profiles (nerve fibres) and thick profiles (nerve terminals). Axosomatic and axoaxonic synapses are described. Synapses between supraependymal fibres and ependyma cells have also been found.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00318929
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  • 6
    Electronic Resource
    Electronic Resource
    Antioxidant enzymes in the digestive gland of the common musselMytilus edulis (1992)
    Springer
    Marine biology 112 (1992), S. 265-276 
    Details
    ISSN: 1432-1793
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology
    Notes: Abstract Antioxidant enzymes function to remove deleterious reactive oxygen species, including the superoxide anion radical and H2O2. Subcellular distributions and optimal and other properties of catalase (EC. 1.11.1.6), superoxide dismutase (SOD; EC. 1.15.1.1), selenium-dependent glutathione peroxidase (Se-GPX; EC. 1.11.1.9) and total glutathione peroxidase (GPX) activities were determined in the digestive gland of the common musselMytilus edulis L. by spectrophotometric and cytochemical/electron microscopic (catalase) techniques. Assay conditions for Se-GPX and total GPX activities were determined which optimized the difference between the non-enzymic and enzymic rates of reaction. General peroxidase activity (guaiacol as substrate) (EC. 1.11.1.7) was not detectable in any subcellular fraction. Catalase was largely, if not totally, peroxisomal, whereas SOD and GPX activities were mainly cytosolic. Distinct mitochondrial (Mn-SOD) and cytosolic (CuZn-SOD) SOD forms were indicated. Catalase properties were consistent with a catalase, rather than a catalase-peroxidase. The pH-dependence and temperature-dependence of GPX activity were different with H2O2 or CHP as substrate, and these and other observations indicate the existence of a distinct Se-GPX. Under saturating or optimal (GPX) assay conditions, the apparent Michaelis constantsK m (mM) were: catalase, 48 to 68 (substrate, H2O2); Se-GPX, 0.11 (H2O2) and 2.0 (glutathione); and total GPX, 2.2 (eumene hydroperoxide) and 1.2 (glutathione). Calculated catalase activity was 2 to 4 orders of magnitude greater than Se-GPX activity over an [H2O2] of 1 to 1000 μM. The results are discussed in relation to theoretical calculations of in vivo oxyradical production and phylogenetic differences in antioxidant enzyme activities.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00702471
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  • 7
    Electronic Resource
    Electronic Resource
    Karotypic characterization of turbot (Scophthalmus maximus) with conventional, fluorochrome and restriction endonuclease-banding techniques (1994)
    Springer
    Marine biology 120 (1994), S. 609-613 
    Details
    ISSN: 1432-1793
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology
    Notes: Abstract A karyotypic analysis was carried out in turbot (Scophthalmus maximus) using conventional banding techniques, fluorochromes and restriction endonucleasebanding. The standard karyotype of turbot is 2n=44 chromosomes, with 48 chromosome arms. Nucleolar organizer regions, which were localized in the short arm of Chromosome Pair No. 3, showed C-and chromomycin A3-positive staining. C-bands were mainly located at the centromeres, but were also present in some interstitial and telomeric locations. No differences were revealed among constitutive heterochromatin bands after treatment of fixed chromosomes with fluorochrome staining and restriction endonucleases. Digestion with DdeI restriction enzyme produced a pattern of interstitial banding which suggested some degree of differentiation along the chromosome arms in turbot. Neither variation in chromosome number of arm number nor polymorphism in nucleolar organizer regions was revealed in the turbot analyzed.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00350082
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  • 8
    Electronic Resource
    Electronic Resource
    Clinical and CT scan assessment of benign versus fatal spontaneous cerebellar haematomas (1986)
    Springer
    Acta neurochirurgica 79 (1986), S. 80-86 
    Details
    ISSN: 0942-0940
    Keywords: Cerebellar haemorrhage ; computerized tomography ; posterior fossa ; haematoma resolution ; hydrocephalus
    Source: Springer Online Journal Archives 1860-2000
    Topics: Medicine
    Notes: Summary We have studied 15 cases of spontaneous intracerebellar haematomas in 9 males and 6 females. A significant correlation between the clinical presentation and the CT scan features of benign and fatal haemorrhages of the cerebellum is presented. Diagnostic computerized tomographic studies were performed in a mean interval of 31 hours after the initial symptoms. 60% were diagnosed and treated in less than 24 hours; 11 patients had haematomas larger than 3 cm, and 5 (45%) of these cases died with evidence of irreversible brain-stem damage. Twelve (80%) showed compression of the fourth ventricle, 9 (60%) obliteration of the brainstem cisterns and 8 (53%) ventricular dilatation. 8 cases were treated with surgery; 50% of them showed neurological improvement, including two cases with signs of brain-stem compression. 7 patients who were treated conservatively were followed closely with repeated CT scans, which showed that resolution of the mass effect and isodensity of the haematomas occurred within 9 to 15 days, with a mean of 11 days, after the initial CT scan. An increased mortality was observed with haematomas larger than 3cm (73%), hydrocephalus (45%) and intraventricular haemorrhage (40%). Smaller haematomas without CT scan evidence of obliteration of the brain-stem cisterns or hydrocephalus had a better outcome.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF01407449
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  • 9
    Electronic Resource
    Electronic Resource
    Cavernomas of the central nervous system: Clinical syndromes, CT scan diagnosis, and prognosis after surgical treatment in 25 cases (1987)
    Springer
    Acta neurochirurgica 85 (1987), S. 29-33 
    Details
    ISSN: 0942-0940
    Keywords: Cavernous haemangioma ; cavernoma ; cystic tumour of the CNS ; computed tomography of cavernomas ; vascular hamartoma ; seizures in cerebral cavernomas
    Source: Springer Online Journal Archives 1860-2000
    Topics: Medicine
    Notes: Summary We present our clinical experience and the results of surgical management with 25 cavernomas of the CNS, treated in our hospital in the last 10 years. The location of the lesion assessed by clinical and CT scan examinations, proved to be the most significative factor determining the prognosis of cavernomas of the CNS, after surgical removal. The symptoms started in most of the cases in the third decade of life. 19 cases were located in the cerebral hemispheres and produced three well defined clinical syndromes: 1) Irritative syndrome (seizures) present in 70% of the cases. 2) Space-occupying lesion syndrome (20%) and 3) haemorrhagic syndrome (10%). The remaining six cases were located within the basal ganglia, brainstem, pineal region, cerebellum and spinal cord, showing a progressive course. CT scan studies were performed on 24 cases. The characteristic image of a cavernoma is represented by a moderately hyperdense nodule with discreet contrast uptake. Calcification was observed in and around the lesions in 33% of the cases. Perilesional hypodensities suggestive of brain tissue atrophy were noted in 22% of the CT scans. On the other hand, 12% of cerebral hemisphere cavernomas showed atypical CT scan images that suggested an erroneous diagnosis of cystic gliomas. Radical surgical removal was performed in all cases. The postoperative results varied according to the location of the lesions. Complete recovery was obtained with cerebral hemisphere cavernomas presenting with a progressive history suggesting tumour or a haemorrhagic syndrome. 85% of the cases presenting with seizures, were symptom-free and taking no anticonvulsants 1 year after surgery. In deeply placed cavernomas (basal ganglia and brainstem) the surgical results were poor. In the latter cases surgery has to be carefully evaluated when a mode of treatment is to be considered in patients whose CT scan data strongly suggest a diagnosis of cavernoma.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF01402366
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  • 10
    Electronic Resource
    Electronic Resource
    Neuropsychological evaluation in a series of 17 cases operated on for craniosynostosis (1993)
    Springer
    Acta neurochirurgica 120 (1993), S. 123-125 
    Details
    ISSN: 0942-0940
    Keywords: Craniosynostosis ; malformations ; neuropsychological tests
    Source: Springer Online Journal Archives 1860-2000
    Topics: Medicine
    Notes: Summary In a study of patients suffering from Craniosynostosis various pre- and post-operative parameters were identified that may affect subsequent intellectual capacity. In particular, facial malformations appeared to be closely correlated with impaired intellectual development. Other parameters included measurement of cranial circumference and volume; their subaverage values correlated with slight mental insufficiency. However, in the pre-operative period they cannot be used as prognostic indices because these relations were statistically not significant. The remaining parameters (neurological and electroencephalographic findings, post-operative re-ossification of the skull, pre-operative digital impressions, CT findings) did not seem to be related to intellectual development.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF02112029
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