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  • 1
    Electronic Resource
    Electronic Resource
    Precision measurement of two iodine lines at 585 nm and 549 nm (1994)
    Springer
    The European physical journal 348 (1994), S. 147-150 
    Details
    ISSN: 1434-601X
    Keywords: 06.20.Hq ; 42.50.Wm ; 29.20.Dh
    Source: Springer Online Journal Archives 1860-2000
    Topics: Physics
    Notes: Abstract The transition frequencies of thei-component of the R(99)15-1 and thew-component of the R(85)26-0 transition in the B-X system of molecular127I2 have been determined with an overall relative standard uncertainty of 1.3 · 10−10. For this purpose a commercial linear dye laser has been modified and stabilized to the corresponding iodine line. This dye laser serves as a transportable frequency standard which is compared with the wavelength standards of the PTB. The evaluation of an experiment for testing special relativity at the test storage ring (TSR) in Heidelberg is based on the precision of the reported interferometric wavelength comparison.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF01289603
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    Paper (German National Licenses)
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  • 2
    Electronic Resource
    Electronic Resource
    Ultrastructural morphology of amyloid fibrils from neuritic and amyloid plaques (1983)
    Springer
    Acta neuropathologica 60 (1983), S. 113-124 
    Details
    ISSN: 1432-0533
    Keywords: Amyloid ; Alzheimers disease ; Scrapie ; EM ; Isolation ; Gerstmann-Sträussler syndrome
    Source: Springer Online Journal Archives 1860-2000
    Topics: Medicine
    Notes: Summary The structure of partially purified, CNS amyloid fibrils from three different sources have been compared by negative stain EM. The fibrils isolated from brains with senile dementia of Alzheimer type were 4–8 nm in diameter, narrowing every 30–40 nm and apparently composed of two 2–4 nm filaments. The fibrils from a Gerstmann-Sträussler syndrome brain were 7–9 nm in diameter, narrowing every 70–80 nm and with a suggestion that they are composed of two 3–5 nm filaments. The fibrils isolated from 87V scrapie-affected mouse brains were 4–8 nm in diameter with a twist every 15–25 nm presumably composed of two 2–4 nm filaments. The fibrils from the scrapie brains were usually observed in pairs. The shape of the clusters of the isolated amyloid fibrils observed in each disease was similar in negative stain and thin section EM preparations and was related to the characteristic morphology of the amyloid fibrils in the neuritic and amyloid plaques in situ. The structural differences between the CNS amyloid fibrils from the various diseases studied by us may reflect differences in the polypeptides which comprise the fibril and/or a different pathogenesis in the formation of the amyloid fibrils.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00685355
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    Paper (German National Licenses)
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  • 3
    Electronic Resource
    Electronic Resource
    Abnormal fibrils from scrapie-infected brain (1981)
    Springer
    Acta neuropathologica 54 (1981), S. 63-74 
    Details
    ISSN: 1432-0533
    Keywords: Scrapie ; Fibrils ; Amyloid
    Source: Springer Online Journal Archives 1860-2000
    Topics: Medicine
    Notes: Summary Abnormal fibrillary structures, designated “scrapie-associated fibrils” (SAF), have been observed using negative stain techniques in subfractions of brains from scrapie-affected animals. SAF have been observed in all combinations of strain of scrapie agent and strain or species of host examined, regardless of their histopathology, in particular the presence or absence of amyloid plaques. SAF consist either of two or four filaments. They are morphologically dissimilar to the normal brain fibrils — microtubules, neurofilaments, glial filaments, and F actin. However, SAF do bear a resemblance to amyloid.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00691333
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    Paper (German National Licenses)
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