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  • Wiley-Blackwell  (12)
  • 2020-2023
  • 1995-1999  (5)
  • 1980-1984  (6)
  • 1950-1954  (1)
  • 1935-1939
  • 1
    Electronic Resource
    Electronic Resource
    Simplified finite element mesh for dynamic analysis of a nuclear reactor building (1983)
    Chichester [u.a.] : Wiley-Blackwell
    International Journal for Numerical Methods in Engineering 19 (1983), S. 1414-1420 
    Details
    ISSN: 0029-5981
    Keywords: Engineering ; Engineering General
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Mathematics , Technology
    Notes: The design of nuclear facilities requires dynamic analysis to evaluate their performance during an earthquake. In modal analysis, a method recommended for dynamic analysis by the Nuclear Regulatory Commission, the natural frequencies and mode shapes of the structure are commonly calculated using a stiffness matrix computed using the finite element method.A primary goal of this study was to design a finite element mesh, capable of modelling a reactor structure, with a minimum number of nodes and elements. This is necessary since analysis using a mesh fine enough to include all of the structural elements is not feasible because of exorbitant computer time and storage requirements. It was found that for lateral motion, a representative reactor structure could be accurately modelled using a simplified mesh with only one isoparametric quadratic quadrilateral element per floor. In this mesh essentially infinite springs must be placed between the masses at each floor level to prevent internal movements of the lumped masses within the quadratic quadrilateral elements.It was also found that a structure with rigid heavy bottom floors and a light top floor can be subjected to large displacements in the top floor during earthquakes. It was concluded that the properties of that light top floor (especially shear area) controls the value of the fundamental frequency of the building.
    Additional Material: 3 Ill.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/nme.1620190911
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  • 2
    Electronic Resource
    Electronic Resource
    2-D multiplane finite element technique for solving a class of 3-D problems (1983)
    Chichester [u.a.] : Wiley-Blackwell
    International Journal for Numerical Methods in Engineering 19 (1983), S. 113-124 
    Details
    ISSN: 0029-5981
    Keywords: Engineering ; Engineering General
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Mathematics , Technology
    Notes: A finite element technique, for efficient solution of a class of 3-D elasticity problems, is presented. In this method, standard 2-D finite elements are used along with a ‘connector’ element. An element, previously used to model material interfaces, is shown to provide the properties for use as a ‘connector’ element, if input variables are redefined. The accuracy of the technique is illustrated with a sample solution.
    Additional Material: 11 Ill.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/nme.1620190111
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  • 3
    Electronic Resource
    Electronic Resource
    A scalable Lagrange multiplier based domain decomposition method for time-dependent problems (1995)
    Chichester [u.a.] : Wiley-Blackwell
    International Journal for Numerical Methods in Engineering 38 (1995), S. 3831-3853 
    Details
    ISSN: 0029-5981
    Keywords: domain decomposition ; dynamics ; nonlinear ; parallel processing ; Engineering ; Engineering General
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Mathematics , Technology
    Notes: We present a new efficient and scalable domain decomposition method for solving implicitly linear and non-linear time-dependent problems in computational mechanics. The method is derived by adding a coarse problem to the recently proposed transient FETI substructuring algorithm in order to propagate the error globally and accelerate convergence. It is proved that in the limit for large time steps, the new method converges toward the FETI algorithm for time-independent problems. Computational results confirm that the optimal convergence properties of the time-independent FETI method are preserved in the time-dependent case. We employ an iterative scheme for solving efficiently the coarse problem on massively parallel processors, and demonstrate the effective scalability of the new transient FETI method with the large-scale finite element dynamic analysis on the Paragon XP/S and IBM SP2 systems of several diffraction grating finite element structural models. We also show that this new domain decomposition method outperforms the popular direct skyline solver. The coarse problem presented herein is applicable and beneficial to a large class of Lagrange multiplier based substructuring algorithms for time-dependent problems, including the fictitious domain decomposition method.
    Additional Material: 3 Ill.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/nme.1620382207
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  • 4
    Electronic Resource
    Electronic Resource
    Characteristics of plasma membrane isolated from a mouse T lymphoma line: comparison after nitrogen cavitation, shearing, detergent treatment, and microvesiculation (1982)
    New York, N.Y. : Wiley-Blackwell
    Journal of Cellular Biochemistry 20 (1982), S. 127-138 
    Details
    ISSN: 0730-2312
    Keywords: electron microscopy ; plasma membrane ; lymphoma cells ; Life and Medical Sciences ; Cell & Developmental Biology
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Biology , Chemistry and Pharmacology , Medicine
    Notes: Plasma membrane was isolated from the mouse T lymphoma cell line WEHI-22 using four different methods of cell disruption followed by centrifugal fractionation. Disruption by nitrogen cavitation or by shearing with a cell pump produced plasma membrane vesicles of similar buoyant density (1.10 g/ml) and morphological appearance. Few C-type virus particles were present. Cell disruption with 2% Tween-40 produced membrane vesicles of similar morphology but lower density (1.09 g/ml). All of the above preparations resulted in vesicles with aggregated intramembranous particles after freeze fracture. Microvesiculation with a sublytic concentration of a lysophosphatidylcholine analog (ET-12-H) (0.0032% w/v) produced small membrane vesicles which could be isolated without differential centrifugation. However, these had a slightly higher density than vesicles prepared by cavitation or shearing and were co ntaminated by virus particles. Unlike the other preparations, vesicles prepared with ET-I2-H had dispersed intramembranous particles. The enzyme γ-glutamyl transferase was enriched from 20- to 45-fold in the membrane preparations and proved a suitable plasma membrane marker for these cells whose 5′-nucleotidase content is very low.
    Additional Material: 5 Ill.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/jcb.240200205
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  • 5
    Electronic Resource
    Electronic Resource
    The physical chemistry of polyelectrolyte solutionsPaper presented at the meeting of the GDCh-Fachgruppe “Makromolekulare Chemie” on “Polymers and Water” in Bad Nauheim (W-Germany) on April 2/3 1984. (1984)
    Weinheim : Wiley-Blackwell
    Angewandte Makromolekulare Chemie 123 (1984), S. 63-83 
    Details
    ISSN: 0003-3146
    Keywords: Chemistry ; Polymer and Materials Science
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology , Physics
    Notes: Some physical properties of aqueous solutions containing linear, flexible, polyelectrolytes are reviewed in order to emphasize the role of charge interactions in these systems which strongly depend on the charge of the macromolecular chain and the concentration of low molar mass electrolyte in solution. Particular emphasis is put on polyelectrolyte solutions containing an excess of added salt, which from a theoretical point of view are easier to understand. Both the dilute and the semi-dilute case will be discussed. In the former the problem of the electrostatic potential around the macromolecular chain is briefly reviewed as well as the use of a wormlike chain model to derive average dimensions of polyelectrolytes in solutions. In the latter the scaling approach to concentration effects in polyelectrolyte solutions is briefly discussed. The pecularities of the semi-dilute regime in polyelectrolyte solutions is illustrated with the help of results obtained with dynamic light scattering and the time dependent decay of electric birefringence.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/apmc.1984.051230103
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  • 6
    Electronic Resource
    Electronic Resource
    Hexose transport derepressed and refractory to purine regulation in NAD(H)-depleted Nil cells (1984)
    New York, NY [u.a.] : Wiley-Blackwell
    Journal of Cellular Physiology 118 (1984), S. 218-224 
    Details
    ISSN: 0021-9541
    Keywords: Life and Medical Sciences ; Cell & Developmental Biology
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Biology , Medicine
    Notes: Nil hamster fibroblasts depleted of NAD(H) by growth in medium devoid of nicotinamide (NAm-MEM) exhibit up to 2-3-fold higher rates of glucose transport. Derepression of glucose transport is observed only when Nil cells have become severely depleted of both intracellular NAD(H) and ATP, despite the continued presence of 5.5 mM D-glucose in the growth medium. Neither the initial rate of transport, approximated from 3-O-methylglucose uptake, nor accumulation of D-glucose itself is repressed upon restoring nicotinamide to the medium. Exposure of the cells to NAD+ (10-5 M), however, leads to a sharp curtailment of transport within 2 to 3 hours. The purines, hypoxanthine and guanine, that sharply reduce glucose transport capacity of normal cells, have no significant effect upon transport activity of NAD(H)-depleted cells.
    Additional Material: 8 Ill.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/jcp.1041180215
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  • 7
    Electronic Resource
    Electronic Resource
    Reactivation of NAD(H) biosynthetic pathway by exogenous NAD+ in nil cells severely depleted of NAD(H) (1983)
    New York, NY [u.a.] : Wiley-Blackwell
    Journal of Cellular Physiology 114 (1983), S. 235-244 
    Details
    ISSN: 0021-9541
    Keywords: Life and Medical Sciences ; Cell & Developmental Biology
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Biology , Medicine
    Notes: The culture of Nil hamster fibroblasts in MEM lacking nicotinamide (NAm- MEM) leads to: (1) the rapid loss of intracellular total nicotinamide adenine dinucleotide (NAD(H)) content in these cells from a level of 150-200 pmoles/105 cells to less than 20 pmoles/105 cells; (2) the cessation of cell division and inhibition of DNA synthesis; and (3) a reduction of glucose consumption and lactic acid production. In most situations, following nicotinamide starvation, the restoration of intracellular NAD(H) follows rapidly the readdition of NAD+ (oxidized), nicotinamide mononucleotide (NMN), nicotinamide, or nicotinic acid. Resumption of cell division occurs after only a lag of about 24 hours. Nil cells subcultured for three consecutive times in the absence of nicotinamide (3° NAm- cells) exhibit different behavior. These severely starved cells are incapable of quickly restoring their intracellular NAD(H) content to normal levels when provided with any pyridine ring compound except NAD+. One-hour exposure of such cells to NAD+ allows utilization of nicotinamide to rapidly restore intracellular NAD(H). This short incubation with NAD+ does not result in any significant restoration of intracellular NAD(H) or lead to the accumulation of an intracellular pool of some precursor. This function of NAD+ as a stimulatory signal to the NAD(H)-biosynthetic pathway in severely starved Nil cells is a previously unreported role of NAD+, and does not require protein synthesis.
    Additional Material: 9 Ill.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/jcp.1041140214
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  • 8
    Electronic Resource
    Electronic Resource
    Effects of potassium and rubidium on the resting potential of muscleThese studies were aided by a contract between the Office of Naval Research, Department of the Navy and the New York University (NR 113-300).The material of this paper comprises an abstract of part of the Master's Thesis of Mr. Mandel. (1951)
    Philadelphia : Wiley-Blackwell
    Journal of Cellular and Comparative Physiology 38 (1951), S. 271-291 
    Details
    ISSN: 0095-9898
    Keywords: Life and Medical Sciences ; Cell & Developmental Biology
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Biology , Medicine
    Additional Material: 3 Ill.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/jcp.1030380210
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  • 9
    Electronic Resource
    Electronic Resource
    Zur Reaktion der Lanthanoiden mit Chelatliganden Darstellung und Struktur von [(py2CH)3Gd] (1995)
    Weinheim : Wiley-Blackwell
    Zeitschrift für anorganische Chemie 621 (1995), S. 941-944 
    Details
    ISSN: 0044-2313
    Keywords: GdIII trigonal prismatic complexes ; synthesis ; crystal structure ; Chemistry ; Inorganic Chemistry
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Description / Table of Contents: On the Reaction of the Lanthanides with Chelate Ligands Synthesis and Crystal Structure of [(py2CH)3Gd]GdBr3 reacts with [(py2CH)Li] to the mononuclear complex [(py2CH)3Gd] 1.The structure of 1 was characterized by X-ray single crystal structure analysis. Space group P21, Z = 2, a = 951.4(10) pm, b = 1369.4(10) pm, c = 1074.5(10) pm, β = 105.69(8)°.The Gd-Ion is surrounded by the six nitrogen atoms of the three chelate ligands and shows a distorted trigonal prismatic coordination. As a difference to the lithium salt of the ligand, the six-membered metalla-cycles in 1 are not planar, but show a boat conformation.
    Notes: GdBr3 reagiert mit [(py2CH)Li] zu dem einkernigen Komplex [(py2CH)3Gd] 1.Der Aufbau von 1 wurde durch eine Kristallstrukturanalyse geklärt: Raumgruppe P21, Z = 2, a = 951,4(10) pm, b = 1369,4(10) pm, c = 1074,5(10) pm, β = 105,69(8)°.Das Gd-Ion ist von den sechs Stickstoff-Atomen der drei Chelatliganden koordiniert und besitzt eine verzerrt trigonalprismatische Umgebung. Die in 1 gebildeten Metalla-Sechsringe sind im Gegensatz zum Lithiumsalz des Liganden nicht planar, sondern zeigen Wannenkonformation.
    Additional Material: 1 Ill.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/zaac.19956210606
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  • 10
    Electronic Resource
    Electronic Resource
    Darstellung und Struktur von [Cp2MoHLi(thf)]3 · Toluol (1995)
    Weinheim : Wiley-Blackwell
    Zeitschrift für anorganische Chemie 621 (1995), S. 945-947 
    Details
    ISSN: 0044-2313
    Keywords: Molybdenum(II) ; Mo—Li heterobimetallic complex ; synthesis ; X-ray structure analysis ; Chemistry ; Inorganic Chemistry
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Description / Table of Contents: Synthesis and Crystal Structure of [Cp2MoHLi(thf)]3 · Toluene[Cp2MoHLi]4 reacts in THF/Toluene to the trimeric complex [Cp2MoHLi(thf)]3 · Toluene 1.The structure of 1 was characterized by X-ray single crystal structure analysis. Space group P63, Z = 2, a = 1459.5(9) pm, c = 1182.3(8) pm. The central unit is represented by a Mo3Li3-hexagon. Each Mo-Atom is surrounded by two Cp-Ligands. One THF-Molecule is coordinated to each Li-atom. The Hydrogen-Ligand could not be located by the single crystal structure analysis.
    Notes: [Cp2MoHLi]4 reagiert in THF/Toluol zu der trimeren Verbindung [Cp2MoHLi(thf)]3 · Toluol 1.Der Aufbau von 1 wurde durch eine Kristallstrukturanalyse geklärt: Raumgruppe P63, Z = 2, a = 1459,5(9) pm, c = 1182,3(8) pm. Die zentrale Einheit in 1 bildet ein Mo3Li3-Sechsring. An jedes Mo-Atom koordinieren zwei Cp-Liganden. Jeweils ein THF-Molekül koordiniert an ein Li-Atom.
    Additional Material: 1 Ill.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/zaac.19956210607
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