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  • 1975-1979  (4)
  • 1955-1959  (1)
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Erscheinungszeitraum
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  • 1
    Digitale Medien
    Digitale Medien
    GANGLIOSIDES OF PERIPHERAL NERVE MYELIN (1976)
    Oxford, UK : Blackwell Publishing Ltd
    Journal of neurochemistry 26 (1976), S. 0 
    Details
    ISSN: 1471-4159
    Quelle: Blackwell Publishing Journal Backfiles 1879-2005
    Thema: Medizin
    Notizen: —Gangliosides have been isolated from myelin obtained from three types of peripheral nerve: bovine spinal roots, bovine sciatic nerve and human sciatic nerve. Yields in most cases were 218–287 μg of lipid-bound sialic acid per g myelin, less than half that previously obtained from CNS myelin. Myelin accounted for approx 60% of total ganglioside present in whole spinal root. The human sample contained only N-acetylneuraminic acid but the two bovine preparations contained that as well as N-glycolylneuraminic acid; N-acetylglucosamine and N-acetylgalactosamine were both present in all three preparations. Sphingosine was the major long-chain base in each preparation while 4-eicosasphingenine (d20:1) comprised about 14% in the two bovine samples and 3% in the human sample. The major fatty acids in all preparations were 16:0, 18:0, 22:0, 24:0 and 24:1. Sialosylgalactosyl ceramide (G7), a ganglioside characteristic of CNS myelin, was not detected in any of the PNS samples. The majority of gangliosides in bovine spinal root myelin were monosialo species, although the structures differed in some respects from those of CNS myelin. The molar concentration of lipid-bound sialic acid in PNS myelin is roughly equivalent to that of the P1 basic protein.
    Materialart: Digitale Medien
    URL: http://dx.doi.org/10.1111/j.1471-4159.1976.tb04451.x
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  • 2
    Digitale Medien
    Digitale Medien
    AN UNUSUAL CASE OF LEPROSY. (1958)
    Oxford, UK : Blackwell Publishing Ltd
    British journal of dermatology 70 (1958), S. 0 
    Details
    ISSN: 1365-2133
    Quelle: Blackwell Publishing Journal Backfiles 1879-2005
    Thema: Medizin
    Materialart: Digitale Medien
    URL: http://dx.doi.org/10.1111/j.1365-2133.1958.tb13344.x
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  • 3
    Digitale Medien
    Digitale Medien
    Changes in the sialic acid content of chick thymus and bursa of Fabricius during age-involution (1979)
    Springer
    Cellular and molecular life sciences 35 (1979), S. 1251-1252 
    Details
    ISSN: 1420-9071
    Quelle: Springer Online Journal Archives 1860-2000
    Thema: Biologie , Medizin
    Notizen: Summary The sialic acid content of both thymus and bursa of Fabricius during their growth and involution phases in chick has been reported in this study. It is observed that the sialic acid concentration is very high in 1-week-old chickens. The concentration subsequently decreases to a significant level and rises again prior to the onset of involution. In the postinvolution period, a more or less minimal and constant level is maintained. The role of sialic acid in cellular activities of thymo-bursal system has been discussed.
    Materialart: Digitale Medien
    URL: http://dx.doi.org/10.1007/BF01963320
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  • 4
    Digitale Medien
    Digitale Medien
    Formation of chiasmata in the synchronous meiotic cycle of Lilium longiflorum (1977)
    Springer
    Chromosoma 64 (1977), S. 167-174 
    Details
    ISSN: 1432-0886
    Quelle: Springer Online Journal Archives 1860-2000
    Thema: Biologie , Medizin
    Notizen: Abstract The results of treatment of meiotic cells of Lilium longiflorum by cycloheximide at the time of chiasma initiation and formation suggest that in the sequential phases of nuclear development, complete chiasma suppression resulting in achiasmate cells is attained prior to a quantitative reduction of chiasma frequency. Reduction of chiasma frequency and complete suppression are believed to be based on two different mechanisms.
    Materialart: Digitale Medien
    URL: http://dx.doi.org/10.1007/BF00327056
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  • 5
    Digitale Medien
    Digitale Medien
    Ultrastructural studies of late meiotic prophase nuclei of spermatocytes in Ascaris suum (1979)
    Springer
    Chromosoma 70 (1979), S. 375-384 
    Details
    ISSN: 1432-0886
    Quelle: Springer Online Journal Archives 1860-2000
    Thema: Biologie , Medizin
    Notizen: Abstract Post pachytene stages of meiotic prophase in males of Ascaris suum have been analyzed with the electron microscope. No synaptonemal-like polycomplexes (PCs) have been observed in the nucleoplasm or cytoplasm during the period from pachytene to diakinesis. From Serially sectioned diplotene nuclei it was found that the bivalents are located near the periphery of the nuclei, the central part of the nuclei being vacant. Each nucleus contains one nucleolus. Up to 1 μm long stretches of unpaired lateral elements (LEs) are found in some of the diplotene bivalents. These LEs are morphologically similar to unpaired LEs in early zygotene nuclei. Partial 3-dimensional reconstruction of two nuclei shows that the bivalents contain some small stretches of synaptonemal complex (SC) up to 1.9 μm long. Some bivalents at diakinesis show remnants of SCs. At this stage chromosomes are fibrous, condensed, attached to the nuclear envelope and mostly with a rounded profile in cross section. The synchronous development of the spermatocytes and small bivalents at diplotene in A. suum make this system a good object for the study of localization of SC remnants.
    Materialart: Digitale Medien
    URL: http://dx.doi.org/10.1007/BF00328773
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