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  • 1
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    Conducting Polymers with Micro or Nanometer Structure (2008)
    Berlin, Heidelberg : Springer
    Details
    Keywords: Chemistry ; Materials ; Nanotechnology ; Polymers
    ISBN: 9783540693239
    URL: https://doi.org/10.1007/978-3-540-69323-9
    Language: English
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    E-BOOK
  • 2
    Electronic Resource
    Electronic Resource
    Calendering of non-newtonian fluids (1986)
    New York, NY [u.a.] : Wiley-Blackwell
    Journal of Applied Polymer Science 31 (1986), S. 2457-2465 
    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: The calendering of non-Newtonian fluids by two rotating cylinders to produce thin films of fluids finds wide application in polymer sheet-making and food-drying industries. Theoretical work has previouly been devoted to the symmetrical case where the cylinders are of equal diameters rotating at the same speed. The present work proposes a new one-film theory of calendering of power law fluids for unequal radii and surface velocities of the calendering cylinders. The relationship between the dimensionless thickness of the calendered fluid, Δe* and that of the incoming fluid, Δi* is shown to be a function of the ratio of the surface velocities of the cylinders and the power law index. The result further shows that Δe* tends to asymptote after the second decade of Δi*
    Additional Material: 3 Ill.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/app.1986.070310806
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  • 3
    Electronic Resource
    Electronic Resource
    A spin label study of immobilized enzyme spectral subpopulations (1992)
    New York, NY [u.a.] : Wiley-Blackwell
    Biotechnology and Bioengineering 40 (1992), S. 306-312 
    Details
    ISSN: 0006-3592
    Keywords: spin label ; immobilized α-chymotrypsin ; ESR ; enzyme immobilization ; spectral subpopulation ; solvent accessibility ; Chemistry ; Biochemistry and Biotechnology
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Biology , Process Engineering, Biotechnology, Nutrition Technology
    Notes: Electron spin resonance (ESR) spin label studies have been carried out to examine the active site conformation of α-chymotrypsin before and after immobilization on two types of organic polymer supports: Amberlite XAD-8 and XAD-2. α-Chymotryspin was first chemically modified by reaction with methyl-4-phenylbutyrimidate and then inhibited by the active site spin label 4-(2,2,6,6-tetramethyl-piperdine-1-oxyl)-m-flurosulfonylbenzamide. In general, the ESR spectra of the active site lable revealed no significant changes in conformation for most of the enzyme before or after derivatization. On the other hand, two spectral subpopulations (A and B) of spin-labeled enzyme were characterized on the basis of their ESR spectra after immobilization on Amberlite XAD-8. Spectral subpopulation A (distinguished by a highly restrained spectrum) appeared to retain its active site structure and conformation and represented a large majority of the labeled chymotrypsin on the beads. Its presence correlated with the high activity and stability of phenylbutyramidinated chymotryspin on the Amberlite XAD-8 beads. Spectral subpopulation B (distinguished by a very weakly constrained spectrum) appeared to reflect loosely bound or denatured enzyme which was removable upon washing with 40% (v/v) ethylene glycol. Two methods for examining solvent accessibility to the active site lable of the kinetics of ascorbate reduction suggested that both spectral subpopulations had identical accessibilities to the bulk solvent. Paramagnetic broadening of the signal by K3Fe(CN)6 revealed differences in the spin-spin broadening of the A and B components but is deemed and inappropriate indicator of solvent accessibility.
    Additional Material: 5 Ill.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/bit.260400215
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  • 4
    Electronic Resource
    Electronic Resource
    Highly efficient secretion of heterologous proteins from Saccharomyces cerevisiae using inulinase signal peptides (1996)
    New York, NY [u.a.] : Wiley-Blackwell
    Biotechnology and Bioengineering 49 (1996), S. 473-479 
    Details
    ISSN: 0006-3592
    Keywords: INU signal peptide ; MFα1 leader peptide ; secretion ; human lipocortin-1 ; human interleukin-2 ; Chemistry ; Biochemistry and Biotechnology
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Biology , Process Engineering, Biotechnology, Nutrition Technology
    Notes: The INU genes of Kluyveromyces marxianus encode inulinases which are readily secreted from Saccharomyces cerevisiae into the culture medium. To evaluate the utility of the INU signal peptides for the secretion of heterologous proteins from S. cerevisiae, a variety of expression and secretion vectors were constructed with GAL10 promoter and GAL7 terminator. The coding sequence for human lipocortin-1 (LC1) was inserted in-frame with the INU signal sequences, and then the secretion efficiency and localization of LC1 were investigated in more detail and compared with those when being expressed by the vector with the MFα1 leader peptide. The vector systems with INU signal peptides secreted ca. 95% of the total LC1 expressed into the extracellular medium, while the MFα1 leader peptide-containing vector resulted in very low secretion efficiency below 10%. In addition, recombinant human interleukin-2 (IL-2) was expressed and secreted with the vector systems with INU signal peptide, and a majority fraction of the human IL-2 expressed was found to be secreted into the extracellular medium as observed in LC1 expression. © 1995 John Wiley & Sons, Inc.
    Additional Material: 4 Ill.
    Type of Medium: Electronic Resource
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  • 5
    Electronic Resource
    Electronic Resource
    Heparin removal from blood using poly(L-lysine) immobilized hollow fiber (1992)
    New York, NY [u.a.] : Wiley-Blackwell
    Biotechnology and Bioengineering 40 (1992), S. 530-536 
    Details
    ISSN: 0006-3592
    Keywords: heparin removal ; poly(L-lysine) imobilized surface ; affinity adsorption of heparin ; deheparinization of blood ; Chemistry ; Biochemistry and Biotechnology
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Biology , Process Engineering, Biotechnology, Nutrition Technology
    Notes: Based on the negative charge density characteristics of heparin, an affinity adsorption technique has been developed for the removal of heparin from blood. Poly(L-lysine) · HBr (PLL · HBr), a polycation, was immobilized with the help of cyanogen bromide (BrCN) onto poly(ethylene-vinyl alcohol) (PEVAL) copolymer coated polyethylene (PE) hollow fibers. Heparin bound rapidly onto PLL · HBr imobilized surface in buffer, plasma, and blood. The heparin binding capacity of PLL immobilized surface increased sevenfold as compared to a non-PLL-treated control. When heparinized blood was recirculated through a PLL immobilized PEVAL hollow fiber cartridge, the anticoagulant activity of heparin decreased by 85% from initial activity in 25 min. Moreover, circulation of blood through PLL immobilized hollow fiber did not show any adverse effects; no hemolysis was observed and no significant loss of plasma proteins was noted during the heparin removal process. These results suggest that PLL immobilized surface may be utilized for rapid and effective removal of heparin from blood. © 1992 John Wiley & Sons, Inc.
    Additional Material: 6 Ill.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/bit.260400412
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  • 6
    Electronic Resource
    Electronic Resource
    Selective protein transport through a thin cellulose coated porous membrane (1994)
    New York, NY [u.a.] : Wiley-Blackwell
    Biotechnology and Bioengineering 43 (1994), S. 207-214 
    Details
    ISSN: 0006-3592
    Keywords: composite membrane ; spin coating ; permselectivity ; implant ; regenerated cellulose ; Chemistry ; Biochemistry and Biotechnology
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Biology , Process Engineering, Biotechnology, Nutrition Technology
    Notes: A new composite membrane was designed and studied for permselectivity of various molecular weight proteins. The membrane is composed of a porous substrate membrane [Durapore; poly(vinylidene fluoride)] coated with a thin dense layer of regenerated cellulose. This composite membrane was fabricated by spin coating a cellulose acetate solution onto the membrane, followed by alkaline hydrolysis of the cellulose acetate coating to regenerate cellulose. The coated layer was physically characterized by scanning electron microscopy (SEM) and infrared (IR) spectroscopy. In addition, the water uptake into and permeation properties of macromolecules across the coated and uncoated membranes were studied. A typical composite membrane coating was 0.8 ± 0.2 μm thick, resulting in a molecular weight cutoff of approximately 40,000 daltons. This composite membrane also demonstrated negligible diffusional lag time for permeants, due to the diffusional barrier. © 1994 John Wiley & Sons, Inc.
    Additional Material: 6 Ill.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/bit.260430304
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  • 7
    Electronic Resource
    Electronic Resource
    Synthesis and characterization of soluble concanavalin A oligomer (1993)
    New York, NY [u.a.] : Wiley-Blackwell
    Biotechnology and Bioengineering 41 (1993), S. 957-963 
    Details
    ISSN: 0006-3592
    Keywords: concanavalin A ; soluble protein oligomer ; insulin derivatives ; glucose binding ; Chemistry ; Biochemistry and Biotechnology
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Biology , Process Engineering, Biotechnology, Nutrition Technology
    Notes: Concanavalin A, (Con A, MW 26,500/monomer unit) was crosslinked with glutaraldehyde to form soluble, high-molecular-weight (larger than MW 300,000) Con A Oligomers. After filtration to remove insoluble and low-molecular-weight portions (below 300,000 daltons), the size and molecular-weight distribution were characterized by laser light scattering and gel-filtration chromatography. The molecular-size determined by laser light scattering ranged from 870 to 4070 Å, while the molecular weight determined by gel chromatography ranged from 6 × 105 to higher than 2 × 106 daltons. The affinity and kinetics of Con A oligomer binding to polysaccharide (glycogen) were evaluated by precipitation test and turbidity development, respectively. The binding with glycogen was strongest at neutral pH and showed similar activity to unmodified Con A molecules. The binding constants of α-D-glucose and succinyl-aminophenyl α-D glucopyranoside-insulin to Con A oligomer were 1.0 × 103M-1 and 4.5 × 104M-1, respectively and the binding capacity of the oligomer was nearly 85% to 95% of monomeric Con A. The complexes of saccharides and soluble Con A oligomer were stable for at least 7 days. © 1993 Wiley & Sons, Inc.
    Additional Material: 10 Ill.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/bit.260411006
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  • 8
    Electronic Resource
    Electronic Resource
    A study on the anodic protection of Titanium evaporators in Al2(SO4)3 solution (1993)
    Weinheim [u.a.] : Wiley-Blackwell
    Materials and Corrosion/Werkstoffe und Korrosion 44 (1993), S. 295-299 
    Details
    ISSN: 0947-5117
    Keywords: Chemistry ; Polymer and Materials Science
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Mechanical Engineering, Materials Science, Production Engineering, Mining and Metallurgy, Traffic Engineering, Precision Mechanics
    Description / Table of Contents: Untersuchung des anodischen Schutzes von Titanverdampfern in AluminiumsulfatlösungDie Möglichkeit des anodischen Schutzes von Eindampfern aus Titan in Aluminiumsulfatlösung wurde durch Aufnahme von Polarisationskurven, Bestimmung des Gewichtsverlustes und der Löslichkeit der Passivschicht und mit Hilfe der Wechselstromimpedanz untersucht. Dabei wurden die Schutzparameter und die Schutzwirkung ermittelt. Zusätzlich wurde die Praxis des anodischen Schutzes unter Verwendung von verschiedenen Bezugselektroden und Hilfskathoden untersucht. Auch das Streuvermögen wurde gemessen. Vier Reihen von Röhrenverdampfern aus Titan wurden in situ anodisch geschützt. Die seit über einem Jahr laufenden Feldversuche haben befriedigende Ergebnisse gebracht.
    Notes: The feasibility of the anodic protection of titanium evaporators in Al2(SO4)3 solution was studied by the measurement of polarization curves, weight loss, solubility of passive film and AC impedance. The protection parameters and efficiency were determined. In addition, the practical technology of anodic protection was studied by screening reference electrodes and auxiliary cathodes. Throwing power was also measured. Four rows of tube-type evaporators of titanium have been anodically protected in situ. Field tests lasting more than one year show satisfactory results.
    Additional Material: 12 Ill.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/maco.19930440703
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  • 9
    Electronic Resource
    Electronic Resource
    The effect of Pigment volume concentration on corrosion protection of new sacrificial coating (1995)
    Weinheim [u.a.] : Wiley-Blackwell
    Materials and Corrosion/Werkstoffe und Korrosion 46 (1995), S. 33-38 
    Details
    ISSN: 0947-5117
    Keywords: Chemistry ; Polymer and Materials Science
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Mechanical Engineering, Materials Science, Production Engineering, Mining and Metallurgy, Traffic Engineering, Precision Mechanics
    Description / Table of Contents: Der Einfluß der Pigmentvolumenkonzentration auf den Korrosionsschutz einer neuen galvanisch wirkenden BeschichtungEin neuer Typ von galvanisch wirkender Beschichtung (SA Beschichtung) wurde auf der Basis eines anodischen Pigments aus einem Aluminiumlegierungspulver entwickelt, wobei das Potential des darunterliegenden Metalls unterhalb seines freien Korrosionspotentials verschoben wird. Der Einfluß der Pigmentvolumenkonzentration (PVC) auf den Korrosionsschutz des Substratmetalls wurde mittels Potentialmessung, AC Impedanzmessung, Salzwassertauchversuchen und Routinetests untersucht. Um einen ausreichenden Korrosionsschutz zu gewährleisten, wurde ein optimaler Bereich der Volumenkonzentration des Pigments ermittelt. Schutzmechanismen, die die experimentellen Ergebnisse erklären, werden vorgeschlagen.
    Notes: A new type of sacrificial coating (named SA coating) was developed by adopting anodic pigment of aluminum based alloy powder to make the underlying metal more negative than its corrosion potential. The effects of the Pigment Volume Concentration (PVC) on corrosion protection for the substrate metal were studied by potential monitoring, AC impedance measurement, salt water immersion, and routine tests. Optimum pigment volume concentration range was determined to provide satisfactory corrosion protection and the protective mechanisms were proposed to explain the experimental results.
    Additional Material: 5 Ill.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/maco.19950460107
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  • 10
    Electronic Resource
    Electronic Resource
    Ciliotoxicity of intranasal formulations: Menthol enantiomers (1993)
    New York, NY [u.a.] : Wiley-Blackwell
    Chirality 5 (1993), S. 58-60 
    Details
    ISSN: 0899-0042
    Keywords: menthol ; nasal delivery ; adverse effects ; Chemistry ; Organic Chemistry
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Notes: It is shown, using in vitro measurements of beat frequency of rat tracheal cilia, that (+)-(1S, 2R, 5S)-menthol and (-)-(1R, 2S, 5R)-menthol have equipotent ciliotoxicities despite the fact that inhalation of menthol vapours from the crystals of the pure enantiomers show clearly that the (-)-(1R, 2S, 5R)-menthol produces a more potent cooling sensation. Differential scanning calorimetry demonstrates the formation of a racemic compound when equimolar amounts of the two enantiomers are admixed. © 1993 Wiley-Liss, Inc.
    Additional Material: 4 Ill.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/chir.530050203
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