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  • 1
    Electronic Resource
    Electronic Resource
    Springer
    Theoretical and applied genetics 73 (1987), S. 701-706 
    ISSN: 1432-2242
    Keywords: Triticum aestivum ; Peroxidases ; Tissue and substrate-specificity ; Chromosomal location
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology
    Notes: Summary Peroxidase isozymes were studied in the Triticum aestivum L. kernel and in nullisomic-tetrasomic and ditelocentric combinations of ‘Chinese Spring’ wheat. Analyses were carried out on different parts of dry kernels (embryo plus scutellum and endosperm) using polyacrylamide and starch gel electrophoresis, different electrophoretic buffer systems and various staining methods. The peroxidase isozymes showed a low substrate-specificity and a high tissue-specificity. The embryo plus scutellum and the endosperm always presented different peroxidase patterns. Endosperm peroxidases were associated with chromosome arms 7DS, 4BL and 7AS; whereas the embryo plus scutellum isozymes were related to chromosome arms 3AL, 3BL and 3DS. The different results obtained using various electrophoretic techniques are due to the buffer system used. All staining procedures employed revealed the same peroxidase isozymes.
    Type of Medium: Electronic Resource
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  • 2
    ISSN: 1435-1463
    Keywords: Keywords: Parkinson's disease ; selenium ; chromium ; cerebrospinal fluid levels ; serum levels.
    Source: Springer Online Journal Archives 1860-2000
    Topics: Medicine
    Notes: Summary. We compared CSF and serum levels of selenium and chromium, measured by atomic absorption spectrophotometry, in 28 patients with Parkinson's disease (PD) and 43 matched controls. The CSF and serum levels of these trace metals did not differ significantly between PD patients and controls. CSF selenium and chromium levels were not correlated with age, age at onset, duration of the disease, scores of the Unified Parkinson Disease Rating Scale of the Hoehn and Yahr staging in the PD group. Although antiparkinsonian therapy did not influence significantly the CSF levels of selenium, PD patients not treated with levodopa had significantly higher CSF selenium levels than controls (p 〈 0.01). It is possible that increased CSF selenium levels could indicate an attempt of protection against oxidative stress. The normality of CSF and serum chromium levels suggest that these values are not related with the risk for PD.
    Type of Medium: Electronic Resource
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  • 3
    ISSN: 1435-1463
    Keywords: Keywords: Alzheimer's disease ; selenium ; cerebrospinal fluid levels ; serum levels.
    Source: Springer Online Journal Archives 1860-2000
    Topics: Medicine
    Notes: Summary. We compared CSF and serum selenium levels, measured by atomic absorption spectrophotometry, in 27 patients with Alzheimer's disease (AD) (13 females, 14 males, mean ± SD age 73.6 ± 7.4 years) without major clinical signs of undernutrition, and 34 matched controls (18 females, 16 males, mean ± SD age 70.7 ± 7.8 years). CSF and serum selenium levels did not differ significantly between AD-patient (11.4 ± 7.8 ng/ml and 28.5 ± 13.0 ng/ml, respectively) and control groups (13.3 ± 7.0 ng/ml and 22.5 ± 17.5 ng/ml). These values were not correlated with age, age at onset, duration of the disease, and scores of the MiniMental State Examination in the AD group. Weight and body mass index were significantly lower in AD patients than in controls. These results suggest that CSF selenium concentrations are apparently unrelated with the reported oxidative stress processes in patients with AD.
    Type of Medium: Electronic Resource
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