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  • Wiley-Blackwell  (114)
  • Annual Reviews  (1)
  • Landes Bioscience; Kluwer Acad  (1)
  • 1
    Keywords: DUBIN-JOHNSON-SYNDROME ; TRANSPORT ; DOMAIN ; DOMAINS ; MEMBRANE ; PATHOGENESIS ; NEW-YORK
    Type of Publication: Book chapter
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  • 2
    Electronic Resource
    Electronic Resource
    Weinheim : Wiley-Blackwell
    ISSN: 0365-9496
    Keywords: Chemistry ; Inorganic Chemistry
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Type of Medium: Electronic Resource
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  • 3
    Electronic Resource
    Electronic Resource
    Weinheim : Wiley-Blackwell
    ISSN: 0365-9496
    Keywords: Chemistry ; Inorganic Chemistry
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Type of Medium: Electronic Resource
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  • 4
    Electronic Resource
    Electronic Resource
    Chichester [u.a.] : Wiley-Blackwell
    ISSN: 0029-5981
    Keywords: Engineering ; Engineering General
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Mathematics , Technology
    Notes: A new method of performing the shakedown analysis of structures subjected to variable repeated loads and temperature fields is presented. The method employs the standard incremental elastic-plastic finite element algorithm and is based upon a cyclic repetition of piecewise-proportional paths that contain all the vertices of the load-temperature variation domain. A numerical example illustrates the approach.
    Additional Material: 4 Ill.
    Type of Medium: Electronic Resource
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  • 5
    Electronic Resource
    Electronic Resource
    New York : Wiley-Blackwell
    Die Makromolekulare Chemie 125 (1969), S. 302-305 
    ISSN: 0025-116X
    Keywords: Chemistry ; Polymer and Materials Science
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology , Physics
    Additional Material: 1 Ill.
    Type of Medium: Electronic Resource
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  • 6
    Electronic Resource
    Electronic Resource
    New York : Wiley-Blackwell
    Die Makromolekulare Chemie 99 (1966), S. 193-201 
    ISSN: 0025-116X
    Keywords: Chemistry ; Polymer and Materials Science
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology , Physics
    Description / Table of Contents: Zur Untersuchung des Phänomens der Kettenfaltung in unverzweigtem Polyäthylen wurde eine IR-Methode entwickelt, die auf der Zuordnung der 1350- und 1304-cm-1-Banden zu Methylengruppen in gauche-Konformation basiert. Diese Struktur kann sowohl in ungeordneten Bereichen als auch in den Faltungsbögen auftreten; da jedoch die Absorptionskoeffizienten in beiden Fällen versehieden sind, lassen sich die Anteile in jedem Bereich durch Lösung der Absorptionsgleichungen ermitteln.Die Ergebnisse zeigen, daß in langsam abgekäbltem, schmelzkristallisiertem Polyäthylen im wesentlichen die gleiche Faltungsstruktur vorliegt wie in lösungskristallisiertem Material und daß keine ungeordneten Methylengruppen in gauche-Konformation enthaltenden Bereichen auftreten. Schnell abgekühlte Proben enthalten solche Methylengruppen in anomalen Strukturen, welche jedoch während des Temperns verschwind. Durch Tempern bei 120°C läßt sich keine Änderung der Faltungsstruktur bei Einkristallen erreichen.
    Notes: An infrared method has been developed for studying folding in linear polyethylene utilizing the assignment of the 1350 cm-1 and 1304 cm-1 bands to gauche methylene units. Gauche methylenes can occur in the disordered regions or as a part of the fold; their absorption coefficients are different in the two regions and allow one to determine their contribution to each region by simultaneous solution of the absorbance equations.The results indicate the fold structure of slow-cooled bulk polyethylene is essentially the same as the folds of solution crystallized polyethylene and no disordered regions containing gauche methylenes exist. Rapidly cooled samples contain gauche methylenes in anomalous structures which tend to disappear during annealing. Annealing at 120°C. produces no change in the fold structure of single crystals.
    Additional Material: 1 Ill.
    Type of Medium: Electronic Resource
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  • 7
    ISSN: 0025-116X
    Keywords: Chemistry ; Polymer and Materials Science
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology , Physics
    Description / Table of Contents: An verstrecktem Polyäthylenterephthalat wurden differentialkalorimetrische und Dichtemessungen durchgeführt. Die Kristallinität und die Schmelzwärme hängen von der Art der molekularen Umordnungen ab, die durch Verstreckungsgrad und Verstrecktemperatur bestimmt wird. Bei niedrigen Temperaturen (nahe der Einfriertemperatur) lösen die Moleküle ihre Verspannungen durch Entknäuelung unter geringem Gleiten und ohne wesentliche Parallelisierung der Ketten. Bei Temperaturen über 100°C gleiten die Moleküle aneinander ab und entspannen sich unter nur schwacher Entknäuelung. Bei Proben, die bel Temperaturen in der Nähe der Einfriertemperatur mehr als 160% gestreckt werden, tritt spannungsinduzierte Kristallisation auf; bei starker Spannung tritt sowohl Kettenparallelisierung als auch Entknäuelung ein und ruft bei diesen Temperaturen Kristallisation hervor. Bei noch höheren Temperaturen und starker Spannung ist die Entknäuelung zu gering, um eine Kristallisation zuzulassen. Beim Tempern einer verstreckten Probe unter Spannung nimmt die Entknäuelung proportional dieser Spannung zu.
    Notes: Dynamic differential calorimetry and density measurements have been made on drawn polyethylene terephthalate. The crystallinity and heats of fusion depend on the type of molecular rearrangements produced by the extent of draw and the temperature of draw. At low temperatures (near the glass transition) the molecules relieve strain by uncoiling with little sliding or alignment occurring. At temperatures above 100°C the molecules glide past one another to relieve strain with little uncoiling Strain-induced crystals are formed in the samples drawn more than 160% at temperatures near the glass transition; at high strain, both chain alignment and uncoiling occur and produce crystallization at these temperatures. At higher temperatures and high strain, the uncoiling is too small to allow crystallization. Annealing a drawn sample under strain resulted in an increase in uncoiling which is proportional to the strain.
    Additional Material: 10 Ill.
    Type of Medium: Electronic Resource
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  • 8
    Electronic Resource
    Electronic Resource
    Weinheim : Wiley-Blackwell
    ISSN: 0044-8249
    Keywords: Chemistry ; General Chemistry
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Type of Medium: Electronic Resource
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  • 9
    Electronic Resource
    Electronic Resource
    Weinheim : Wiley-Blackwell
    ISSN: 0044-8249
    Keywords: Chemistry ; General Chemistry
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Type of Medium: Electronic Resource
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  • 10
    ISSN: 0021-9541
    Keywords: Life and Medical Sciences ; Cell & Developmental Biology
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Biology , Medicine
    Notes: The garland cell of Drosophila is a nephrocyte which takes up waste products from the haemolymph. Endocytosis is thought to occur by the pinch-off of coated vesicles from deep invaginations of the plasma membrane called labyrinthine channels. Electron microscopic studies show that the length of these channels is variable, depending on the relative rates of membrane pinch-off and reinsertion (recycling). Thus, in wild-type garland cells, if the temperature is raised from 19°C to 30°C, the channels shorten, because at high temperature the pinch-off rate exceeds the reinsertion rate. On the other hand, in garland cells of the temperature-sensitive, single-gene mutant shibirets1(shi), in which endocytosis is reversibly blocked at the pinch-off stage at 30°C, the labyrinthine channels elongate considerably, as membrane insertion proceeds while pinch-off is blocked. The rates of membrane pinch-off and insertion were quantitated in living garland cells by observing the changes in the capacitance of the whole cell membrane which occur as a result of changes in the total area of the plasma membrane. In wildtype cells, the capacitance gradually decreased as the temperature was raised to 30°C, reflecting the shortening of the channels. In shi cells, the capacitance decreased between 19°C and 26°C but then began to increase at higher temperatures as the blockage of endocytosis caused by the shi gene took effect, causing the channels to elongate. The observations suggest that in shi cells the surface area of the cell more than doubles in 1 2 min by channel elongation. Estimates of the amount of membrane which is pinched off and reinserted were made.
    Additional Material: 10 Ill.
    Type of Medium: Electronic Resource
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