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  • 1
    Electronic Resource
    Electronic Resource
    Analytic study of chaos of the tent map: Band structures, power spectra, and critical behaviors (1983)
    Springer
    Journal of statistical physics 31 (1983), S. 279-308 
    Details
    ISSN: 1572-9613
    Keywords: Chaos ; mapping ; invariant measure ; ergodicity ; band structure of chaos ; power spectrum of chaos ; critical behavior ; scaling law ; Frobenius-Perron operator
    Source: Springer Online Journal Archives 1860-2000
    Topics: Physics
    Notes: Abstract Chaotic behaviors of the tent map (a piecewise-linear, continuous map with a unique maximum) are studied analytically throughout its chaotic region in terms of the invariant density and the power spectrum. As the height of the maximum is lowered, successive band-splitting transitions occur in the chaotic region and accumulate to the transition point into the nonchaotic region. The timecorrelation function of nonperiodic orbits and their power spectrum are calculated exactly at the band-splitting points and in the vicinity of these points. The method of eigenvalue problems of the Frobenius-Perron operator is used. 2 m−1 critical modes, wherem = 1,2, 3, ..., are found which exhibit the critical slowing-down near the 2 m−1-band to 2 m -band transition point. After the transition these modes become periodic modes which represent the cycling of nonperiodic orbits among 2 m bands together with the periodic modes generated by the preceding band splittings. Scaling laws near the transition point into the nonchaotic region are investigated and a new scaling law is found for the total intensity of the periodic part of the spectrum.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF01011583
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  • 2
    Electronic Resource
    Electronic Resource
    Cytochemical changes in lactate dehydrogenase isoenzymes in human brain tumours (1984)
    Springer
    Acta neurochirurgica 71 (1984), S. 243-253 
    Details
    ISSN: 0942-0940
    Keywords: Brain tumours ; LDH isoenzyme ; cytochemistry
    Source: Springer Online Journal Archives 1860-2000
    Topics: Medicine
    Notes: Summary The lactate dehydrogenase (LDH) isoenzyme patterns in benign and malignant brain tumours were determined by means of electrophoresis of the cell extracts and selective cytochemical stain of the smears. The LDH isoenzyme distribution of the cell extracts showed a pronounced cathodal shift in the malignant gliomas and metastatic carcinomas. Normal brain tissues and histologically benign gliomas, however, showed an anodal pattern with a dominance of the H-type LDH. Schwannomas and meningiomas had a midzone isoenzyme pattern with a dominant LDH3 fraction. Pituitary adenomas usually showed the LDH pattern similar to that of the normal cerebrum. The LDH M fraction could be cytochemically verified using an inhibitory effect by 2.6 M urea in staining. Astrocytomas grades 3–4 and metastatic carcinomas were characterized by loss or marked reduction of stainability by urea treatment, while astrocytomas grades 1–2 and oligodendrogliomas were resistant to urea inhibition.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF01401319
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    Paper (German National Licenses)
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  • 3
    Electronic Resource
    Electronic Resource
    Effect of polymer composition on the production of cationic multihollow polymer particles by the stepwise acid/alkali method (1999)
    Springer
    Colloid & polymer science 277 (1999), S. 589-594 
    Details
    ISSN: 1435-1536
    Keywords: Key words Hollow ; Particle ; Emulsion polymerization ; Morphology ; Swelling
    Source: Springer Online Journal Archives 1860-2000
    Topics: Chemistry and Pharmacology , Mechanical Engineering, Materials Science, Production Engineering, Mining and Metallurgy, Traffic Engineering, Precision Mechanics
    Notes: Abstract The effect of the polymer composition on the formation of multihollow structures formed within submicron-sized styrene–butyl acrylate–dimethylaminoethyl methacrylate terpolymer particles by the “acid/alkali method” proposed by the authors was examined. The cationic particles were produced by seeded emulsion terpolymerization with 2,2′-azobis(2-amidinopropane) hydrochloride initiator. The dimethylaminoethyl methacrylate content and the glass-transition temperature of the terpolymer greatly affected the formation of the multihollow structure.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/s003960050430
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    Paper (German National Licenses)
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  • 4
    Electronic Resource
    Electronic Resource
    Effect of nonionic emulsifier on the production of multihollow polymer particles by the stepwise acid/alkali method (2000)
    Springer
    Colloid & polymer science 278 (2000), S. 358-363 
    Details
    ISSN: 1435-1536
    Keywords: Key words Hollow ; Particle ; Emulsion polymerization ; Morphology ; Swelling
    Source: Springer Online Journal Archives 1860-2000
    Topics: Chemistry and Pharmacology , Mechanical Engineering, Materials Science, Production Engineering, Mining and Metallurgy, Traffic Engineering, Precision Mechanics
    Notes: Abstract The effects of nonionic emulsifier on the formation of multihollow structures formed within sub-micron-sized polymer particles by the “acid/alkali method” proposed by the authors were examined. The original acid-swellable particles were produced by seeded emulsion terpolymerization of styrene, butyl acrylate, and dimethylaminoethyl methacrylate. The results indicate that the nonionic emulsifier had a great effect on the formation of multihollow particles.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/s003960050525
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    Paper (German National Licenses)
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