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  • 1
    Electronic Resource
    Electronic Resource
    Concentration fluctuations in mixtures of linear and star-shaped polymers (1990)
    s.l. : American Chemical Society
    Macromolecules 23 (1990), S. 654-659 
    Details
    ISSN: 1520-5835
    Source: ACS Legacy Archives
    Topics: Chemistry and Pharmacology , Physics
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1021/ma00204a044
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  • 2
    Electronic Resource
    Electronic Resource
    Star-branched polymers. 5. The .theta. temperature depression for 8- and 12-arm polyisoprenes in dioxane (1980)
    s.l. : American Chemical Society
    Journal of the American Chemical Society 102 (1980), S. 2410-2413 
    Details
    ISSN: 1520-5126
    Source: ACS Legacy Archives
    Topics: Chemistry and Pharmacology
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1021/ja00527a045
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  • 3
    Electronic Resource
    Electronic Resource
    Relaxation after a temperature jump within the one-phase region of a polymer mixture (1996)
    College Park, Md. : American Institute of Physics (AIP)
    The Journal of Chemical Physics 104 (1996), S. 9647-9650 
    Details
    ISSN: 1089-7690
    Source: AIP Digital Archive
    Topics: Physics , Chemistry and Pharmacology
    Notes: Small-angle neutron scattering was used to observe the relaxation of the structure factor from a smaller to a larger fluctuation state after a temperature jump within the one-phase region of a miscible polymer blend. The blend studied is a 60/40 by weight mixture of a hydrogen bonded polymer blend which consists of hydroxy modified deuterated polystyrene and poly(butylmethacrylate). A peak clearly evolved during the transition from the initial state at Ti to the final state at Tf as predicted by linear as well as nonlinear theories. This relaxation process, which took more than 10 h, could be represented reasonably well by a simple linear approximation of the Cahn–Hilliard–Cook (CHC) theory without involving nonlinear calculations for the evolution of the dynamic structure factor. The measurement offers an alternative method for estimating the order parameter relaxation rate in the one-phase region. Also, this demonstrates experimentally the correct relaxation (to a higher fluctuation state) mechanism predicted by the linear theory of CHC type. © 1996 American Institute of Physics.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1063/1.471717
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  • 4
    Electronic Resource
    Electronic Resource
    Experiences with the use of an argon beam coagulator in reduction mammaplasty (1998)
    Springer
    European journal of plastic surgery 21 (1998), S. 230-235 
    Details
    ISSN: 1435-0130
    Keywords: Key words Argon beam coagulator ; Reduction mammaplasty ; Electrosurgery ; Hemostasis
    Source: Springer Online Journal Archives 1860-2000
    Topics: Medicine
    Notes: Abstract  Argon beam coagulation is a method that is steadily gaining popularity in plastic surgery procedures. In an attempt to judge its true value, a prospective, randomized trial was performed in reduction mammaplasty. Fifty-six patients were studied; in 28 the Valleylab Force GSU® System was used and in 28 conventional electrocautery. Pre-, intra- and postoperative hemoglobin and hematocrit values for the two groups were compared; the intra- and early postoperative levels were higher in the argon beam group. A pilot study promised significant differences between the two groups, however, the main study failed to show this. An analysis of this situation revealed problems related to individual surgeon experience with the device, and the technique needed to be changed in order to benefit from argon gas enhanced surgery. Minor complications occurred equally in both study groups.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/s002380050077
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  • 5
    Electronic Resource
    Electronic Resource
    In vitro production of enzymatically active myosin heavy chain (1993)
    Springer
    Journal of muscle research and cell motility 14 (1993), S. 26-34 
    Details
    ISSN: 1573-2657
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology , Medicine
    Notes: Summary In order to initiate studies on the structural and functional relationships of the myosin heavy chain, we constructed a full-length complementary DNA encoding the isoform that is found in the fast white muscle of the embryonic chicken. The complementary DNA contained 108 basepairs of its 3′-untranslated region and was preceded by a leader sequence derived from the alfalfa mosaic virus. Similarly, a complementary DNA encoding 963 amino acids which encompass the subfragment-1 of myosin and part of the subfragment-2 was also constructed. Each was inserted into the expression vector pMT2 and transiently transfected into COS-1 cells. Both constructs directed the expression of the respective proteins, each of which was immunogenic. The full-length and subfragment-1 proteins interacted with actin and demonstrated high levels of a K+-actived, EDTA-resistant ATPase activity, which is characteristic of myosin.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00132177
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  • 6
    Electronic Resource
    Electronic Resource
    Equilibrium structure of hydrogen-bonded polymer blends (1998)
    Bognor Regis [u.a.] : Wiley-Blackwell
    Journal of Polymer Science Part B: Polymer Physics 36 (1998), S. 2745-2750 
    Details
    ISSN: 0887-6266
    Keywords: polymer blends ; hydrogen bonding ; small-angle neutron scattering ; Physics ; Polymer and Materials Science
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology , Physics
    Notes: Deuterium-labeled polystyrene modified by random distributions of the comonomer p-(1,1,1,3,3,3-hexaflouro-2-hydroxyisopropyl)-α-methyl-styrene [DPS(OH)] has been blended with poly(butyl methacrylate) (PBMA) and studied with small-angle neutron scattering (SANS). Miscibility is induced via hydrogen bonding between the DPS(OH) hydroxyl group and PBMA carbonyl groups. The data suggest that the nature of the miscible-phase structure in these blends differs from that of the usual homopolymer blends at small scattering angles, which we attribute to the short-range site specific nature of the hydrogen bond interaction. © 1998 John Wiley & Sons, Inc. J Polym Sci B: Polym Phys 36: 2745-2750, 1998
    Additional Material: 5 Ill.
    Type of Medium: Electronic Resource
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    Paper (German National Licenses)
  • 7
    Electronic Resource
    Electronic Resource
    Static and kinetic studies of polystyrene/poly(vinylmethylether) blends (1986)
    Stamford, Conn. [u.a.] : Wiley-Blackwell
    Polymer Engineering and Science 26 (1986), S. 3-8 
    Details
    ISSN: 0032-3888
    Keywords: Chemistry ; Chemical Engineering
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology , Mechanical Engineering, Materials Science, Production Engineering, Mining and Metallurgy, Traffic Engineering, Precision Mechanics , Physics
    Notes: A systematic study of static and kinetic phase behavior of deuterated polystyrene/poly(vinylmethylether) blends is presented in this paper. The static properties are studied by the small angle neutron scattering techniques and the kinetics of phase decomposition are studied by the temperature jump light scattering; technique. This procedure provides detailed information about phase behavior with regard to both thermodynamics and kinetics.
    Additional Material: 12 Ill.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/pen.760260104
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  • 8
    Electronic Resource
    Electronic Resource
    Phase decomposition phenomena in polystyrene/(polyvinylmethylether) (1986)
    Stamford, Conn. [u.a.] : Wiley-Blackwell
    Polymer Engineering and Science 26 (1986), S. 1208-1212 
    Details
    ISSN: 0032-3888
    Keywords: Chemistry ; Chemical Engineering
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology , Mechanical Engineering, Materials Science, Production Engineering, Mining and Metallurgy, Traffic Engineering, Precision Mechanics , Physics
    Notes: This paper reports studies on polystyrene/poly-(vinylmethylether) blends to elucidate phase decomposition phenomena. Small angle neutron scattering (SANS) and temperature jump light scattering (TJLS) techniques were used to study both static and kinetic properties. The SANS methods were used to characterize the blends with respect to phase diagram, the Flory-Huggins interaction parameter, and the critical fluctuation length as a function of temperature. From the TJLS experiments, we have demonstrated the possibility of two kinds of phase decomposition mechanisms which should lead to distinct morphology and material properties.
    Additional Material: 7 Ill.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/pen.760261708
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