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  • 1
    Electronic Resource
    Electronic Resource
    Micro- and macroconformation of macromolecules (1981)
    Springer
    Polymer bulletin 5 (1981), S. 131-135 
    Details
    ISSN: 1436-2449
    Source: Springer Online Journal Archives 1860-2000
    Topics: Chemistry and Pharmacology , Mechanical Engineering, Materials Science, Production Engineering, Mining and Metallurgy, Traffic Engineering, Precision Mechanics , Physics
    Notes: Summary Cyclotetracosane exhibits complex phase behaviour in the solid state as well as in the melt as evidenced by complementary methods, DSC, BRILLOUIN scattering, dielectric constant and PE-MAS 13c-NMR. Three solid phases have been verified, one of them — within the range from 299.5 to 312 K — exhibits extremely high molecular mobility. Between the start of melting, 312 K, and the first order transition at ∼ 321 K a mesomorphic type region develops. Two additional transitions have been detected in the melt. That occuring at 361 K (DSC), 356 K (BRILLOUIN data) resembles the Tu as observed in n-alkanes.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00265156
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  • 2
    Electronic Resource
    Electronic Resource
    Micro and macroconformation of macromolecules (1982)
    Springer
    Polymer bulletin 8 (1982), S. 503-510 
    Details
    ISSN: 1436-2449
    Source: Springer Online Journal Archives 1860-2000
    Topics: Chemistry and Pharmacology , Mechanical Engineering, Materials Science, Production Engineering, Mining and Metallurgy, Traffic Engineering, Precision Mechanics , Physics
    Notes: Summary By variable temperature proton enhanced magic angle spinning 13C NMR below Tg individual conformational diads could be resolved for glassy phase segments in semicrystalline erythrodiisotactic poly(1,2-dimethyltetramethylene). An assignment based on γ-shift increments associated with antigauche conformational transitions is given. In addition an improved interpretation of conformational effects in the glassy phase solid state spectrum of amorphous threodiisotactic poly(1,2-dimethyltetramethylene) is presented.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00262928
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  • 3
    Electronic Resource
    Electronic Resource
    Novel blends of alternating propene-carbon monoxide copolymers and styrenic copolymers (1999)
    Springer
    Polymer bulletin 42 (1999), S. 611-618 
    Details
    ISSN: 1436-2449
    Source: Springer Online Journal Archives 1860-2000
    Topics: Chemistry and Pharmacology , Mechanical Engineering, Materials Science, Production Engineering, Mining and Metallurgy, Traffic Engineering, Precision Mechanics , Physics
    Notes: Summary Alternating propene-carbon monoxide copolymers (P-CO) were melt-blended with polystyrene, poly(styrene-co-acrylonitrile) (SAN), and with poly(styrene-co-maleic anhydride) (SMA). P-CO forms homogeneously miscible blends with SAN containing 25 wt% AN at the investigated blend compositions. The transparent blends have single, intermediate glass transition temperatures that fit the Fox equation. The elastic properties of P-CO at room temperature disappear upon blending with SAN because the T g is driven above RT. Polystyrene and SMA are not miscible with P-CO and form heterogeneous blends with two glass transitions. This demonstrates that both the polarity of the styrenic copolymer and the nature of the comonomer govern its phase behavior.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/s002890050509
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  • 4
    Electronic Resource
    Electronic Resource
    Micro- and macroconformation of macromolecules (1981)
    Springer
    Polymer bulletin 6 (1981), S. 93-100 
    Details
    ISSN: 1436-2449
    Source: Springer Online Journal Archives 1860-2000
    Topics: Chemistry and Pharmacology , Mechanical Engineering, Materials Science, Production Engineering, Mining and Metallurgy, Traffic Engineering, Precision Mechanics , Physics
    Notes: Summary The first results are reported about the conformational analysis of an amorphous polymer in the glassy state by means of proton enhanced variable-temperature magic angle spinning 13C NMR experiments. In amorphous threodiisotactic poly(1,2-dimethyltetramethylene) at 220 K different conformational diads could be resolved and assigned. From the spectrum of the glassy polymer the shift increment associated with a conformational change of main chain bonds from anti to gauche is determined. In addition the populations of the conformations of CH-CH bonds and of CH-CH-CH2 bond pairs of poly(1,2-dimethyltetramethylene)s are determined in the glassy state and energy differences between these conformations are estimated.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00256510
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  • 5
    Electronic Resource
    Electronic Resource
    On the essential spectrum of the linearized Navier-Stokes operator (2000)
    Springer
    Integral equations and operator theory 38 (2000), S. 9-27 
    Details
    ISSN: 1420-8989
    Keywords: Primary 35G15 ; 35P05 ; 35Q30 ; Secondary 35E99 ; 35J45 ; 47F05
    Source: Springer Online Journal Archives 1860-2000
    Topics: Mathematics
    Notes: Abstract We determine the essential spectrum of the linearized Navier-Stokes operator with physical boundary conditions. In contrast to other approaches we do not make use of pseudo-differential operators. We establish a direct proof using only some fundamental results for matrix operators.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF01192299
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  • 6
    Electronic Resource
    Electronic Resource
    The effect of tumour sera on the growth of plant tissues (1981)
    Springer
    Naturwissenschaften 68 (1981), S. 271-272 
    Details
    ISSN: 1432-1904
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology , Chemistry and Pharmacology , Natural Sciences in General
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF01047336
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  • 7
    Electronic Resource
    Electronic Resource
    Measuring chaotic scenarios in a sodium-filled resonator (1992)
    Springer
    Applied physics 55 (1992), S. 126-131 
    Details
    ISSN: 1432-0649
    Keywords: 42.50.Tj ; 42.65.Pc
    Source: Springer Online Journal Archives 1860-2000
    Topics: Physics
    Notes: Abstract A sodium-filled Fabry-Perot resonator shows many different types of irregular behavior. A sophisticated experimental apparatus allows reproducible measurements of oscillation scenarios leading to chaos and thus permits a detailed classification of the different phenomena. A quantitative explanation — featuring a new mechanism — for the best reproducible class of chaotic oscillations is given.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00324062
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  • 8
    Electronic Resource
    Electronic Resource
    Unusual conformation of molecular cylindrical brushes strongly adsorbed on a flat solid surface (2000)
    Springer
    The European physical journal 1 (2000), S. 99-103 
    Details
    ISSN: 1292-895X
    Keywords: PACS. 61.25.Hq Macromolecular and polymer solutions; polymer melts; swelling - 61.20.Ja Computer simulation of liquid structure - 07.05.Tp Computer modeling and simulation
    Source: Springer Online Journal Archives 1860-2000
    Topics: Physics
    Notes: Abstract: Conformational properties of comb-like polymers strongly adsorbed on a flat solid surface were investigated using computer simulation and scanning force microscopy. The computer simulation showed that the macromolecules with asymmetric distribution of the side chains relatively to the backbone are effectively in a collapsed state even under conditions of a good solvent. They formed peculiar helical superstructures which could be observed by scanning force microscopy of cylindrical brushes of polymethylmethacrylate on mica.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/s101890050012
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  • 9
    Electronic Resource
    Electronic Resource
    Voglibose has no effect on the pharmacokinetics of hydrochlorothiazide (1998)
    Springer
    European journal of clinical pharmacology 54 (1998), S. 273-274 
    Details
    ISSN: 1432-1041
    Keywords: Key words Hydrochlorothiazide ; Voglibose
    Source: Springer Online Journal Archives 1860-2000
    Topics: Chemistry and Pharmacology , Medicine
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/s002280050458
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  • 10
    Electronic Resource
    Electronic Resource
    New chromosome counts inStreptocarpus (Gesneriaceae) from Madagascar and the Comoro Islands and their taxonomic significance (2000)
    Springer
    Plant systematics and evolution 224 (2000), S. 173-182 
    Details
    ISSN: 1615-6110
    Keywords: Gesneriaceae ; Streptocarpus ; Chromosome numbers ; growth patterns ; taxonomy ; Africa ; Comoro Islands ; Madagascar
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology
    Notes: Abstract This study records the chromosome numbers of 10 species ofStreptocarpus; nine of the counts are new. With the exception ofS. buchananii of mainland Africa, all the results are for plants endemic to Madagascar and the Comoro Islands. While there is a strong correlation between basic number and growth form in the two subgenera of the genus on the African mainland (x = 15 among caulescent species in subgenusStreptocarpella; x = 16 among acaulescent species in subgenusStreptocarpus), the situation appears more complex among Madagascan and Comoro Island species. One notable example of deviation from this correlation is shown byS. papangae, a shrubby caulescent species, with 2n = 32 (x = 16). Polyploidy in the genus appears to be absent on mainland Africa, but is present in Madagascar and the Comoro Islands, ranging from tetraploidy to octoploidy. Evolutionary implications of the cytological observations are considered.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00986341
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