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  • 1
    Electronic Resource
    Electronic Resource
    Plastid ultrastructure and photosynthesis in greening petaloid hypsophylls (1985)
    Springer
    Planta 163 (1985), S. 164-174 
    Details
    ISSN: 1432-2048
    Keywords: Greening ; Guzmania ; Heliconia ; Hypsophyll ; Plastid transformation ; Postfloral greening ; Spathiphyllum
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology
    Notes: Abstract The ultrastructural and biochemicalphysiological aspects of postfloral greening have been studied in hypsophylls of Heliconia aurantiaca Ghiesbr., Guzmania cf. x magnifica Richter and Spathiphyllum wallisii Regel. In all three species the greening of the hypsophylls is due to plastid transformation, chloroplast formation proceeding from the initially different types of plastids. The degradation process of the original plastid structures and the mode of thylakoid formation are distinct in each case. In none of the species do the transformed plastids look identical to the chloroplasts of the corresponding foliage leaves. On a chlorophyll basis, the rate of photosynthesis of the greened hypsophylls surpasses the rate of the leaves considerably in Spathiphyllum, but is much lower in Heliconia (no data for Guzmania). In all species, anatomy, plastid structure, pigments, 77° K-fluorescence emission, ribulose-1,5-bis-phosphate carboxylase activities and short-term photosynthesis 14CO2-assimilation patterns prove the greened hypsophylls to be capable of providing additional carbon to the developing fruits, thus supplementing the import of organic matter from the foliage leaves.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00393502
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    Paper (German National Licenses)
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  • 2
    Electronic Resource
    Electronic Resource
    186Re/188Re labeled polypeptide microspheres as a potential radiation synovectomy agent (1996)
    Springer
    Journal of radioanalytical and nuclear chemistry 206 (1996), S. 107-117 
    Details
    ISSN: 1588-2780
    Keywords: Radiation Synovectomy ; Polypeptide Microspheres ; Re-186 ; Re-188 ; Rheumatoid Arthritis
    Source: Springer Online Journal Archives 1860-2000
    Topics: Chemistry and Pharmacology , Energy, Environment Protection, Nuclear Power Engineering
    Notes: Abstract Polypeptide microspheres containing polycysteine crosslinked with polylysine were prepared and radiolabeled with186Re and188Re. High labeling yields with the microspheres with both186Re and188Re (97%) were obtained, and above 99% retention of radiolabels in water in 24 hours was obtained. Rhenum-186 labeled polycysteine and polylysine microspheres (1∶1 ratio, 20 μm as mean diameter) were injected intra-articularly into the rear stifes (knee joints) of normal New Zealand white rabbits. About 87% of injected dose was retained in rabbit stifles and adjacent tissues in 96 hours after injection, while most of the activity lost from the joints was excreted in the urine. Due to its simplicity of preparation and radiolabeling, versatility, and biodegradability, this type of conjugate system may become the therapeutics of choice for radiation synovectomy.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF02040047
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    Paper (German National Licenses)
    Fulltext
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