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  • 1990-1994  (2)
  • 1975-1979
  • 15N recovery  (1)
  • Immunotactoid  (1)
  • 1
    Electronic Resource
    Electronic Resource
    Immunotactoid-like endoneurial deposits in a patient with monoclonal gammopathy of undetermined significance and neuropathy (1992)
    Springer
    Acta neuropathologica 84 (1992), S. 484-494 
    Details
    ISSN: 1432-0533
    Keywords: Neuropathy ; Immunotactoid ; Endoneurial deposits ; Monoclonal gammopathy ; Skin
    Source: Springer Online Journal Archives 1860-2000
    Topics: Medicine
    Notes: Summary An 85-year-old man with a 2-year history of progressive lower limb weakness and paresthesia was found to have an IgG kappa monoclonal gammopathy of undetermined significance (mgus). Clinical and electrophysiological studies revealed a severe distal bilateral symmetrical polyneuropathy. a sural nerve biopsy showed extensive nerve fibre loss with the deposition of large amounts of amorphous material throughout the endoneurium. Electron microscopy showed the deposits to be composed of microtubular structures which were located diffusely throughout the endoneurium. The deposits were also located within the lumina of the vasa nervorum, some of which were undergoing disintegration and rupture with release of the proteinaceous material into the endoneurium. The regions of the nerve in which they appeared most numerous showed more severe nerve fibre damage than other areas. These microtubular structures were also observed in disintegrating vessels and adjacent endoneurium. On immunohistochemistry they stained with antibody to IgG. Identical deposits were found in the dermis in which there was a leucocytoclastic vasculitis. Located in linear arrays within the axons of myelinated and unmyelinated fibres were highly organised tubular structures resembling immunotactoids. Identification of immunotactoidlike structures within the nerve is unique and may be another mechanism by which monoclonal proteins can induce nerve fibre injury.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00304467
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    Paper (German National Licenses)
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  • 2
    Electronic Resource
    Electronic Resource
    The nitrogen mineralization rate of legume residues in soil as influenced by their polyphenol, lignin, and nitrogen contents (1990)
    Springer
    Plant and soil 129 (1990), S. 251-259 
    Details
    ISSN: 1573-5036
    Keywords: 15N recovery ; nitrogen release ; nitrogen availability
    Source: Springer Online Journal Archives 1860-2000
    Topics: Agriculture, Forestry, Horticulture, Fishery, Domestic Science, Nutrition
    Notes: Abstract A 12-week greenhouse experiment was conducted to determine the effect of the polyphenol, lignin and N contents of six legumes on their N mineralization rate in soil and to compare estimates of legume-N release by the difference and 15N-recovery methods. Mature tops of alfalfa (Medicago sativa L.), round leaf cassia (Cassia rotundifolia Pers., var. Wynn), leucaena (Leucaena leucocephala Lam., deWit), Fitzroy stylo (Stylosanthes scabra Vog., var Fitzroy), snail medic (Medicago scutellata L.), and vigna (Vigna trilobata L., var verde) were incorporated in soil at the rate of 100 mg legume N kg-1 soil. The medic and vigna were labeled with 15N. Sorghum-sudan hybrid (Sorghum bicolor, L. Moench) was used as the test crop. A non-amended treatment was used as a control. Net N mineralization after 12 weeks ranged from 11% of added N with cassia to 47% of added N for alfalfa. With the two legumes that contained less than 20 g kg-1 of N, stylo and cassia, there was net N immobilization for the first 6 weeks of the experiment. The legume (lignin + polyphenol):N ratio was significantly correlated with N mineralization at all sampling dates at the 0.05 level and at the 0.01 level at 6 weeks (r2=0.866). Legume N, lignin, or polyphenol concentrations or the lignin:N ratio were not significantly correlated with N mineralization at any time. The polyphenol:N ratio was only significantly correlated with N mineralization after 9 weeks (r2=0.692). The (lignin + polyphenol):N ratio appears to be a good predictor of N mineralization rates of incorporated legumes, but the method for analyzing plant polyphenol needs to be standardized. Estimates of legume-N mineralization by the difference and 15N recovery methods were significantly different at all sampling dates for both 15N-labeled legumes. After 12 weeks, estimates of legume-N mineralization averaged 20% more with the difference method than with the 15N recovery method. This finding suggests that estimates of legume N available to subsequent crops should not be based solely on results from 15N recovery experiments.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00032420
    Library Location Call Number Volume/Issue/Year Availability
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    Paper (German National Licenses)
    Fulltext
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