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  • 1
    ISSN: 1432-1130
    Source: Springer Online Journal Archives 1860-2000
    Topics: Chemistry and Pharmacology
    Notes: Abstract SiO2 protective coatings have been deposited on polycarbonate substrates by plasma ion assisted deposition. The influence of ion energy on the water permeability and the surface topography of the coatings was studied by infrared spectroscopy and atomic force microscopy. Coatings deposited at sufficiently high ion energies show a barrier effect against moisture uptake and considerably reduced film roughness. Both effects are attributed to an increase of the packing densities of the coatings.
    Type of Medium: Electronic Resource
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  • 2
    ISSN: 1434-6052
    Source: Springer Online Journal Archives 1860-2000
    Topics: Physics
    Notes: Abstract We present an analysis of the octet baryon masses and the πN andKN σ-terms in the framework of heavy baryon chiral perturbation theory. At next-to-leading order,O(q 3), knowledge of the baryon masses and σπN (0) allows to determine the three corresponding finite low-energy constants and to predict the twoKN σ-terms σ KN (1,2) (0). We also include the spin-3/2 decuplet in the effective theory. The presence of the non-vanishing energy scale due to the octet-decuplet splitting shifts the average octet baryon mass by an infinite amount and leads to infinite renormalizations of the low-energy constants. The first observable effect of the decuplet intermediate states to the baryon masses starts out at orderq 4. We argue that it is not sufficient to retain only these but no other higher order terms to achieve a consistent description of the three-flavor scalar sector of baryon CHPT. In addition, we critically discuss anSU (2) result which allows to explain the large shift σπN (2M π 2 )-σπN (0) via intermediate Δ (1232) states.
    Type of Medium: Electronic Resource
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