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  • Polymer and Materials Science  (10)
  • infrared spectroscopy  (2)
  • serine dehydratase  (2)
  • 1
    Electronic Resource
    Electronic Resource
    Four polymorphic markers on rat chromosome 12 form a single linkage group (1993)
    Springer
    Biochemical genetics 31 (1993), S. 441-448 
    Details
    ISSN: 1573-4927
    Keywords: linkage analysis ; serine dehydratase ; plasminogen activator inhibitor ; simple sequence repeats ; microsatellites ; rat chromosome 12
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology , Chemistry and Pharmacology
    Notes: Abstract Four PCR-typable polymorphic markers were mapped to rat chromosome 12 by linkage analysis of F2 intercross progeny of Fischer (F344/N) and Lewis (LEW/N) rat strains. The markers formed a single linkage group, covering 27.7 cM, with the following order and distance between markers: plasminogen activator inhibitor (Planh)—0.0 cM—phosphoenolpyruvate carboxykinase-related sequence 2 (Pepckr2)—15.4 cM—anonymous marker (D12N155)—12.3 cM—serine dehydratase (Sdh). All markers were identified and genotyped by PCR analysis of simple sequence repeats. The gene encoding Planh was previously assigned to rat chromosome 12, which allowed us to assign the entire linkage group to this chromosome. These markers were highly polymorphic in 13 additional inbred rat strains (BUF/N, BN/SsN, WKY/N, MNR/N, LER/N, WBB1/N, WBB2/N, MR/N, LOU/MN, SHR/N, ACI/N, SR/Jr, and SS/Jr). These markers should be useful tools for further genetic studies in rats.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00553460
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  • 2
    Electronic Resource
    Electronic Resource
    Four polymorphic markers on rat chromosome 12 form a single linkage group (1993)
    Springer
    Biochemical genetics 31 (1993), S. 441-448 
    Details
    ISSN: 1573-4927
    Keywords: linkage analysis ; serine dehydratase ; plasminogen activator inhibitor ; simple sequence repeats ; microsatellites ; rat chromosome 12
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology , Chemistry and Pharmacology
    Notes: Abstract Four PCR-typable polymorphic markers were mapped to rat chromosome 12 by linkage analysis of F2 intercross progeny of Fischer (F344/N) and Lewis (LEW/N) rat strains. The markers formed a single linkage group, covering 27.7 cM, with the following order and distance between markers: plasminogen activator inhibitor (Planh)—0.0 cM—phosphoenolpyruvate carboxykinase-related sequence 2 (Pepckr2)—15.4 cM—anonymous marker (D12N155)—12.3 cM—serine dehydratase (Sdh). All markers were identified and genotyped by PCR analysis of simple sequence repeats. The gene encoding Planh was previously assigned to rat chromosome 12, which allowed us to assign the entire linkage group to this chromosome. These markers were highly polymorphic in 13 additional inbred rat strains (BUF/N, BN/SsN, WKY/N, MNR/N, LER/N, WBB1/N, WBB2/N, MR/N, LOU/MN, SHR/N, ACI/N, SR/Jr, and SS/Jr). These markers should be useful tools for further genetic studies in rats.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF02396228
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  • 3
    Electronic Resource
    Electronic Resource
    Number of binding sites of DNA and polynucleotides with tris(2,2′-bipyridyl)ruthenium(II) cationsDedicated to professor arther charesby on the occasion of his 70th birthday. (1987)
    New York : Wiley-Blackwell
    Biopolymers 26 (1987), S. 189-201 
    Details
    ISSN: 0006-3525
    Keywords: Chemistry ; Polymer and Materials Science
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Notes: The binding of tris(2,2′-bipyridyl)ruthenium(II) cations [Ru(bpy)2+3] with single- and double-stranded (ss and ds) DNA, and the polynucleotides poly(A), poly(C), poly(G), poly(I), poly(I) · poly(C), and poly(U), was studied in aqueous solution. Steady-state electrical conductivity measurements with the polynucleotides, ssDNA, and dsDNA reveal that approximately three nucleotides offer one binding site. This may be compared with the ratio [nucleotide]/[Mg2+] of 2.4 : 1 for dsDNA. After laser excitation (353 nm), the luminescence of Ru(bpy)2+3 bound to nucleic acids shows two decay components. The contribution of the fast component, which is interpreted as resulting from quenching processes of the absorbed ruthenium complex, exhibits a maximum with increasing [nucleotide]/[Ru(bpy)2+3] at a ratio of about three to one. Bound Ru(bpy)2+3 can be released from the strand by addition of NaClO4 [half-concentration: 2.5 and ≤ 10 mM for poly(U) and dsDNA, respectively].
    Additional Material: 5 Ill.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/bip.360260203
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  • 4
    Electronic Resource
    Electronic Resource
    Investigation of the ceriumIV oxidation of poly(vinyl alcohol) (1989)
    Bognor Regis [u.a.] : Wiley-Blackwell
    Journal of Polymer Science Part A: Polymer Chemistry 27 (1989), S. 3837-3854 
    Details
    ISSN: 0887-624X
    Keywords: Chemistry ; Polymer and Materials Science
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Notes: Initiation of ceric ion-induced grafting from poly(vinyl alcohol) (PVOH) was studied by examining the formation and lifetime of colored complexes between ceriumIV and (1) a commercial PVOH, (2) a diol-free PVOH, and (3) several model 1,2-diols. UV/visible spectroscopy was employed using a wavelength of 520 nm. Results showed that the 1,2-diols, which are an inherent defect in PVOH, are the sites most reactive toward ceric ion. The observed rate constant for the reaction was found to increase with decreasing [CeIV] until the maximum rate was reached at which time reaction took place exclusively with 1,2-diols. The activation energy for oxidation of commercial PVOH at the maximum rate was 15.4 kcal/mol while that for diol-free PVOH was 22.4 kcal/mol. The 1,2-diols of PVOH displayed a high equilibrium constant for complexation with ceric ion, compared to the model 2,3-butanediol. It was suggested that the PVOH chain segments bring about crowding of the diol group, and this leads to a higher equilibrium constant for complexation. The lowest energy conformation of a PVOH chain segment containing a 1,2-diol linkage was calculated using the CHEMLAB-II molecular design program, and the 1,2-diol was predicted to be at the center of a sharp bend in the chain brought about by its presence.
    Additional Material: 10 Ill.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/pola.1989.080271124
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  • 5
    Electronic Resource
    Electronic Resource
    Effect of water sorption on the dielectric behavior of calcium chondroitin-4-sulfate (1971)
    New York : Wiley-Blackwell
    Journal of Polymer Science Part A-2: Polymer Physics 9 (1971), S. 917-926 
    Details
    ISSN: 0449-2978
    Keywords: Physics ; Polymer and Materials Science
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology , Physics
    Notes: The dielectric properties of calcium chondroitin-4-sulfate were studied as a function of frequency, temperature, and water content. The dielectric constant changes very little with water content below “monolayer” coverage, and after that the dielectric constant follows the shape of the adsorption isotherm. The dielectric behavior is discussed as affected by interfacial polarization and by the increase in the rotational freedom of the polymer side chains.
    Additional Material: 5 Ill.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/pol.1971.160090511
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  • 6
    Electronic Resource
    Electronic Resource
    Heats of water vapor sorption in swelling biopolymers (1970)
    New York : Wiley-Blackwell
    Biopolymers 9 (1970), S. 1531-1538 
    Details
    ISSN: 0006-3525
    Keywords: Chemistry ; Polymer and Materials Science
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Notes: Heats of water vapor sorption by three biopolymers, polygalacturonic acid, sodium hyaluronate, and calcium salt of bovine submaxillary mucin, were determined calorimetrically. These calorimetric heats of sorption were compared with the isosteric heats of sorption as a function of water uptake. Maxima in both of these functions occur at “monolayer” coverage. The differences between the calorimetric and isosteric heats are explained in terms of the irreversibility of the sorption process, especially in terms of the structural changes that occur in the biopolymers during swelling.
    Additional Material: 3 Ill.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/bip.1970.360091212
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  • 7
    Electronic Resource
    Electronic Resource
    FTIR-ATR studies of drawing and poling in polymer bilaminate films (1994)
    Bognor Regis [u.a.] : Wiley-Blackwell
    Journal of Polymer Science Part B: Polymer Physics 32 (1994), S. 2065-2075 
    Details
    ISSN: 0887-6266
    Keywords: nylon 11 ; poly(vinylidene fluoride) ; bilaminate ; one-way drawing and poling ; FTIR-ATR spectroscopy ; Chemistry ; Polymer and Materials Science
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology , Physics
    Notes: A large increase in the remnant polarization of drawn and poled poly(vinylidene fluoride) (PVF2)/nylon 11 bilaminates compared with the individual films observed in other studies provides the motivation for the examination of dipole orientation in variously treated single and bilaminate films with FTIR-ATR spectroscopy. Four ATR spectra are collected from each surface using two sample orientations and two light polarizations for each incident light angle. The incident light angle is varied to obtain information about the change in structure with depth. Computer simulations of the experimental optics using anisotropic optical constants aides in the interpretation of experimental results. As the result of simple one-way drawing in PVF2 and nylon 11, anisotropy in dipole orientation is observed in the plane transverse to the draw direction. In both single and bilaminate films, the average direction of the amide plane in nylon 11 and the CF2 dipoles in PVF2 resides in the plane of the film, perpendicular to the subsequent poling field direction as a result of one-way drawing. The transverse plane orientation is depth dependent in nylon 11 in both single and bilaminate films and is attributed to a surface-induced effect. Poling fields of 1.6 MV/cm produce large differences between the surfaces of single films and the bilaminates. At the interior interface of the drawn and poled bilaminates, the PVF2 and nylon 11 dipoles important in polarization appear to be random. The structural implications of this as well as other observations from the spectra are interpreted in terms of the large remnant bulk polarization in the poled bilaminate. © 1994 John Wiley & Sons, Inc.
    Additional Material: 10 Ill.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/polb.1994.090321213
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  • 8
    Electronic Resource
    Electronic Resource
    Electric field-induced dipole reorientation in oriented nylon 11 by in situ infrared spectroscopy (1996)
    Bognor Regis [u.a.] : Wiley-Blackwell
    Journal of Polymer Science Part B: Polymer Physics 34 (1996), S. 781-788 
    Details
    ISSN: 0887-6266
    Keywords: nylon ; infrared spectroscopy ; electric field poling ; Chemistry ; Polymer and Materials Science
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology , Physics
    Notes: Dipole reorientation under the influence of an electric field is investigated in oriented nylon 11 films with polarized infrared spectroscopy for the amide A and amide I bands. Butterfly-shaped hysteresis loops are obtained from peak intensity versus applied electric field strength. Least-squares Gaussian curve fitting of the resolved multiple contributions to the amide I peak show that the components change in either a continuously reducing S-shaped fashion, or in butterfly-shaped curves under ac poling fields. Time-dependent studies of the absorption intensities show that both ordered and disordered species switch towards the electric field direction with the application of electric fields higher than the coercive field. Upon field removal, only the disordered species show orientation relaxation away from the field direction. Below the coercive field, neither species responds orientationally to the field. © 1996 John Wiley & Sons, Inc.
    Additional Material: 10 Ill.
    Type of Medium: Electronic Resource
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  • 9
    Electronic Resource
    Electronic Resource
    Fermi resonance in the infrared spectra of Nylon-11 (1992)
    Bognor Regis [u.a.] : Wiley-Blackwell
    Journal of Polymer Science Part B: Polymer Physics 30 (1992), S. 1073-1080 
    Details
    ISSN: 0887-6266
    Keywords: Nylon-11 ; infrared spectroscopy ; Fermi resonance ; crystal structures ; symmetry ; Chemistry ; Polymer and Materials Science
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology , Physics
    Notes: Nylon-11 is prepared by casting from the solvents trifluoroacetic acid and m-cresol and by melt-crystallization. Room-temperature infrared spectra are compared in terms of possible crystal structures. The spectra are examined for the presence of Fermi resonance which occurs between the N-H stretching fundamental mode and the overtone and combination modes of the amide I and II vibrations. An analysis of peak frequencies and intensities is used to provide support for the assignment of the amide II overtone and the amide I + II combination modes. A newly observed peak in the spectra is assigned to the amide I overtone. Symmetry considerations are discussed which predict the resonance of the overtone and combination modes with the N-H stretching fundamental. © 1992 John Wiley & Sons, Inc.
    Additional Material: 6 Ill.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/polb.1992.090301001
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  • 10
    Electronic Resource
    Electronic Resource
    Orientation gradients at polymer surfaces. I. Description of methods (1993)
    New York, NY [u.a.] : Wiley-Blackwell
    Journal of Applied Polymer Science 48 (1993), S. 1229-1240 
    Details
    ISSN: 0021-8995
    Keywords: Chemistry ; Polymer and Materials Science
    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 method capable of quantitative predictions of orientation gradients at the surface of polymers is proposed. It is based on the transformation of variable-angle attenuated total reflected infrared intensities to absorption coefficients versus depth from the surface. Two alternate approaches have been used to demonstrate the viability of the method: computer simulation and sample analysis. Exact reflected intensities from anisotropic layered systems have been calculated with Fresnel coefficients. The exact intensities are used to reextract the orientation gradient with data transformation. This analysis demonstrates the conditions under which the variable-angle method is expected to optimally perform. Simulation results clearly indicate high accuracy near the interface and low accuracy at remote distances. Thin films of isotropic and uniaxially drawn isotactic polypropylene are prepared and used as layered systems. Step functions in orientation can be accurately predicted only when some information is known prior to the gradient calculation. In uniaxially oriented thick films of polypropylene, the analysis indicates that the crystal phase is highly oriented at the surface and in the bulk. Within the first 2 microns from the surface, both the amorphous and crystal phases show negligibly small gradients in orientation. © 1993 John Wiley & Sons, Inc.
    Additional Material: 13 Ill.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/app.1993.070480711
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