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  • 1
    Electronic Resource
    Electronic Resource
    Spinal clear cell meningioma presented with progressive paraparesis in infancy (2000)
    Springer
    Child's nervous system 16 (2000), S. 607-610 
    Details
    ISSN: 1433-0350
    Keywords: Keywords Spinal clear cell meningioma ; Infancy
    Source: Springer Online Journal Archives 1860-2000
    Topics: Medicine
    Notes: Abstract  Clear cell meningioma, about 20 cases of which have been reported in the literature, is a morphological variant of meningioma. The authors report a case of spinal clear cell meningioma that occurred in a child. A 14-month-old girl showed gradually progressive paraparesis 1 month after she started to walk. Magnetic resonance image showed an intradural extramedullary mass compressing the conus medullaris and cauda equina. Complete excision of the tumor was done, and the patient gradually recovered from motor weakness and neurogenic bladder. Histological examinations along with immunohistochemical and ultrastructural investigations allowed a diagnosis of clear cell meningioma. During the follow-up period, a recurrent mass lesion was detected on the 8-month follow-up MR image in the same region. Because clear cell meningioma might be biologically aggressive, postoperative adjuvant therapy and close follow-up investigation should be considered.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/PL00007302
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  • 2
    Electronic Resource
    Electronic Resource
    Mercury levels and its chemical form in tissues and organs of seabirds (1996)
    Springer
    Archives of environmental contamination and toxicology 30 (1996), S. 259-266 
    Details
    ISSN: 1432-0703
    Source: Springer Online Journal Archives 1860-2000
    Topics: Energy, Environment Protection, Nuclear Power Engineering , Medicine
    Notes: Abstract Liver, muscle, kidney, and feather samples from nine species of seabirds were analyzed for total and organic (methyl) mercury (MM). Total mercury (TM) levels in liver showed great intra- and inter-species variations, with the concentrations varied from 306 μg/g (dry weight) in black-footed albatross (Diomedea nigripes) to 4.9 μg/g in arctic tern (Sterna paradisaea), while MM levels were less relatively variable. The order of MM concentrations in tissues of all the seabirds except oldsquaw (Clangula hyemalis) was as follows: liver 〉 kidney 〉 muscle. The mean percentage of MM in total was 35%, 36%, and 66% in liver, kidney, and muscle, respectively, for all the species. Statistically significant negative correlations were found between the proportion of MM to TM and concentrations of TM in the liver and muscle of black-footed albatross and in the liver of laysan albatross. Furthermore, the percentage of MM decreased with an increase in TM concentrations in the liver, muscle, and kidney of all the species. Black-footed albatross had the highest concentration and burden of mercury in the liver, wherein more than 70% of the TM occurred as inorganic mercury. On the other hand, the mercury burdens in feathers were less than 10% of the body burdens, indicating that excretion of mercury by moulting is negligible. The results suggest that some seabirds are capable of demethylating MM in the tissues (mainly in liver), and store mercury as an immobilizable inorganic form in the liver. It is noteworthy that the species with a high degree of demethylation capacity and slow moulting pattern showed low mercury burdens in feathers.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00215806
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    Paper (German National Licenses)
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  • 3
    Electronic Resource
    Electronic Resource
    Characterization of a glutathione S-transferase gene ATGST 1 in Arabidopsis thaliana (1998)
    Springer
    Plant cell reports 17 (1998), S. 700-704 
    Details
    ISSN: 1432-203X
    Keywords: Key wordsArabidopsis thaliana ; Environmental stress ; Glutathione S-transferase
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology
    Notes: Abstract A glutathione S-transferase (GST) gene was cloned in Arabidopsis thaliana. The gene, designated ATGST 1, contained the entire transcription unit in three exons interrupted by two introns. The combined sequence of three exons had an open reading frame which predicted a GST protein of 208 amino acids. Gene transcription has been reported to be induced by pathogen attack and dehydration. In the present study northern blot analysis using a gene-specific DNA probe in the 3′ untranslated region revealed that expression of the gene was also rapidly induced by other environmental stresses such as wounding, low temperature, high salt and DPE herbicide treatment. The promoter region of the gene contained the sequence motif ATTTCAAA that is known to be present in ethylene-responsive elements and other motifs that are highly conserved amongst stress-inducible gene promoters.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/s002990050468
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    Paper (German National Licenses)
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  • 4
    Electronic Resource
    Electronic Resource
    Mercury Levels and its Chemical Form in Tissues and Organs of Seabirds (1996)
    Springer
    Archives of environmental contamination and toxicology 30 (1996), S. 259-266 
    Details
    ISSN: 1432-0703
    Source: Springer Online Journal Archives 1860-2000
    Topics: Energy, Environment Protection, Nuclear Power Engineering , Medicine
    Notes: Abstract. Liver, muscle, kidney, and feather samples from nine species of seabirds were analyzed for total and organic (methyl) mercury (MM). Total mercury (TM) levels in liver showed great intra- and inter-species variations, with the concentrations varied from 306 μg/g (dry weight) in black-footed albatross (Diomedea nigripes) to 4.9 μg/g in arctic tern (Sterna paradisaea), while MM levels were less relatively variable. The order of MM concentrations in tissues of all the seabirds except oldsquaw (Clangula hyemalis) was as follows: liver〉 kidney〉 muscle. The mean percentage of MM in total was 35%, 36%, and 66% in liver, kidney, and muscle, respectively, for all the species. Statistically significant negative correlations were found between the proportion of MM to TM and concentrations of TM in the liver and muscle of black-footed albatross and in the liver of laysan albatross. Furthermore, the percentage of MM decreased with an increase in TM concentrations in the liver, muscle, and kidney of all the species. Black-footed albatross had the highest concentration and burden of mercury in the liver, wherein more than 70% of the TM occurred as inorganic mercury. On the other hand, the mercury burdens in feathers were less than 10% of the body burdens, indicating that excretion of mercury by moulting is negligible. The results suggest that some seabirds are capable of demethylating MM in the tissues (mainly in liver), and store mercury as an immobilizable inorganic form in the liver. It is noteworthy that the species with a high degree of demethylation capacity and slow moulting pattern showed low mercury burdens in feathers.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00215806
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    Paper (German National Licenses)
    Fulltext
  • 5
    Electronic Resource
    Electronic Resource
    Distribution of 14 Elements in Tissues and Organs of Oceanic Seabirds (1998)
    Springer
    Archives of environmental contamination and toxicology 35 (1998), S. 638-645 
    Details
    ISSN: 1432-0703
    Source: Springer Online Journal Archives 1860-2000
    Topics: Energy, Environment Protection, Nuclear Power Engineering , Medicine
    Notes: Abstract. The concentrations of 14 trace elements (Li, V, Mn, Co, Cu, Zn, Se, Rb, Sr, Ag, Cd, Cs, Pb, and Hg) were determined in tissues and organs of three species and in the liver of 11 species of seabirds. Comparatively high concentrations of Li, Co, Sr, and V were found in the femur. Cd, Se, Cu, and Mn concentrations were relatively higher in the kidney than in other tissues and organs. Rb, Cs, and Pb concentrations were rather uniform among tissues. Concentrations of essential elements such as Mn, Cu, and Co were comparable among seabird species, except high Cu concentrations in northern giant petrel. Among nonessential elements, concentrations of Cd and Hg were variable according to seabird species. Pb levels were low in all the species. High Se levels (100 μg/g dry weight) were found in the liver of black-footed albatross and grey petrel. There were significant positive correlations between Se and Cd concentrations in three species and between Se and Hg in black-footed albatross, suggesting that Se has an antagonistic action on the toxic effects of Cd and Hg. Concentrations of Li, V, Ag, and Cs were usually low (less than 1 μg/g dry weight).
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/s002449900426
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  • 6
    Electronic Resource
    Electronic Resource
    Development of new alginate fiber for the immobilization of yeast (1996)
    Springer
    Biotechnology techniques 10 (1996), S. 579-584 
    Details
    ISSN: 1573-6784
    Source: Springer Online Journal Archives 1860-2000
    Topics: Process Engineering, Biotechnology, Nutrition Technology
    Notes: Summary Stabilities of Ca-alginate fiber and ACP(Alginate + Cclite R-634 + Pectin) gel fibers containing different concentrations of alginate were tested. The results showed that the stability of ACP gel fiber containing 5% alginate(5% ACP gel fiber) was better than those of other fibers tested, considering the degree of release of yeast from gel fiber. Scanning electron microscopic observation proved the above results, and concentrations of cell and ethanol obtained by 5% ACP gel fiber were higher than those of others, respectively.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00157365
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