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101

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Finite element analysis of lifting of an elastic plate from a rigid foundation (1976)

Muthiyalu, N. ; Rao, G. Venkateswara

Chichester [u.a.] : Wiley-Blackwell

International Journal for Numerical Methods in Engineering 10 (1976), S. 1183-1187

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ISSN: 0029-5981

Keywords: Engineering ; Engineering General

Source: Wiley InterScience Backfile Collection 1832-2000

Topics: Mathematics , Technology

Additional Material: 4 Ill.

Type of Medium: Electronic Resource

URL: http://dx.doi.org/10.1002/nme.1620100517

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102

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Masthead (1976)

Chichester [u.a.] : Wiley-Blackwell

International Journal for Numerical Methods in Engineering 10 (1976)

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ISSN: 0029-5981

Keywords: Engineering ; Engineering General

Source: Wiley InterScience Backfile Collection 1832-2000

Topics: Mathematics , Technology

Type of Medium: Electronic Resource

URL: http://dx.doi.org/10.1002/nme.1620100601

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103

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Definition of stochastic models during soil compaction (1976)

Drakatos, Panagiotis A.

Chichester [u.a.] : Wiley-Blackwell

International Journal for Numerical Methods in Engineering 10 (1976), S. 1233-1247

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ISSN: 0029-5981

Keywords: Engineering ; Engineering General

Source: Wiley InterScience Backfile Collection 1832-2000

Topics: Mathematics , Technology

Notes: Employing experiments, Correlation Analysis, the method of ‘least square estimation’, and a special computational program, the problem of similarity between the variables of the soil-machine system during soil compaction is examined. The solution, based on the probability theory of ‘Analysis of Variance’, consists in developing the stochastic model which defines the variables and their interactions for different systems.In this particular case of soil compaction by cylinders the theorem of Vaschy-Buckingham or Pi terms is used to define the mononyms (terms) of similarity.The stochastic model, operant in every case, consists of an ellipsoid characteristic of the particular cylinder and its variables, so that greatest soil compaction at a given depth is achievable with a probability of 95 per cent at a level of significance of α = 0.05.

Additional Material: 4 Ill.

Type of Medium: Electronic Resource

URL: http://dx.doi.org/10.1002/nme.1620100604

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104

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Computation of rational product approximations (1976)

Henry, Jackson N.

Chichester [u.a.] : Wiley-Blackwell

International Journal for Numerical Methods in Engineering 10 (1976), S. 1289-1298

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ISSN: 0029-5981

Keywords: Engineering ; Engineering General

Source: Wiley InterScience Backfile Collection 1832-2000

Topics: Mathematics , Technology

Notes: Let F be a continuous real-valued function defined on [-1, 1] × [-1,1]. For purposes of simplifaction in some numerical processes, one may desire to have an approximation of the function F. We present a known method of approximation called the best rational product approximation. When developing this approximation to F, certain types of discontinuities may arise. We develop a slight variation of a known technique to overcome such discontinuities. With this modified technique, it is then possible to develop a computer program to compute the approximation of F. A brief discussion of this program is presented along with some of the results which we have obtained.

Additional Material: 1 Tab.

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URL: http://dx.doi.org/10.1002/nme.1620100608

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105

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Higher order difference formulas for a fourth order parabolic partial differential equation (1976)

Jain, M. K. ; Iyengar, S. R. K. ; Lone, A. G.

Chichester [u.a.] : Wiley-Blackwell

International Journal for Numerical Methods in Engineering 10 (1976), S. 1357-1367

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ISSN: 0029-5981

Keywords: Engineering ; Engineering General

Source: Wiley InterScience Backfile Collection 1832-2000

Topics: Mathematics , Technology

Notes: In this paper, we have derived some new higher order difference formulas for the solution of a fourth order parabolic partial differential equation governing transverse vibrations of a uniform flexible beam in one and two space dimensions using Richtmyer's approach and a direct approach. Two examples illustrate the utility of the new difference methods.

Additional Material: 2 Ill.

Type of Medium: Electronic Resource

URL: http://dx.doi.org/10.1002/nme.1620100614

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106

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Technical note: Horizontally curved beam finite element including warping (1976)

El-Amin, Fathalla M. ; Brotton, D. M.

Chichester [u.a.] : Wiley-Blackwell

International Journal for Numerical Methods in Engineering 10 (1976), S. 1397-1403

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ISSN: 0029-5981

Keywords: Engineering ; Engineering General

Source: Wiley InterScience Backfile Collection 1832-2000

Topics: Mathematics , Technology

Additional Material: 3 Ill.

Type of Medium: Electronic Resource

URL: http://dx.doi.org/10.1002/nme.1620100618

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107

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Numerical stability of dynamic relaxation analysis of non-linear structures (1976)

Cassell, A. C. ; Hobbs, R. E.

Chichester [u.a.] : Wiley-Blackwell

International Journal for Numerical Methods in Engineering 10 (1976), S. 1407-1410

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ISSN: 0029-5981

Keywords: Engineering ; Engineering General

Source: Wiley InterScience Backfile Collection 1832-2000

Topics: Mathematics , Technology

Notes: The estimation of the parameters (‘fictitious densities’) which control the convergence and numerical stability of a non-linear Dynamic Relaxation solution is described. The optimal values of these parameters vary during the iterative solution and they are predicted from the Gerschgörin bounds, that is rowsums of the stiffness matrix, which are divided into constant and variable parts for computational convenience. The procedure is illustrated by reference to the analysis of an axially loaded beam on a non-uniform elastic foundation.

Additional Material: 1 Ill.

Type of Medium: Electronic Resource

URL: http://dx.doi.org/10.1002/nme.1620100620

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108

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Masthead (1976)

Chichester [u.a.] : Wiley-Blackwell

International Journal for Numerical Methods in Engineering 10 (1976)

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ISSN: 0029-5981

Keywords: Engineering ; Engineering General

Source: Wiley InterScience Backfile Collection 1832-2000

Topics: Mathematics , Technology

Type of Medium: Electronic Resource

URL: http://dx.doi.org/10.1002/nme.1620100101

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109

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Finite element large deflection analysis of shallow shells (1976)

Batoz, Jean Louis ; Chattopadhyay, Arup ; Dhatt, Gurbachan

Chichester [u.a.] : Wiley-Blackwell

International Journal for Numerical Methods in Engineering 10 (1976), S. 39-58

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ISSN: 0029-5981

Keywords: Engineering ; Engineering General

Source: Wiley InterScience Backfile Collection 1832-2000

Topics: Mathematics , Technology

Notes: A finite element formulation is presented to study the non-linear buckling of arbitrary shallow elastic thin shells with general boundary conditions and subjected to conservative pressure loading. Pre and post buckling behaviour of a large number of shallow and semi deep doubly curved shells is studied in detail. Unsymmetrical bifurcation paths of a shallow spherical shell subjected to uniform inward pressure are also investigated.

Additional Material: 7 Ill.

Type of Medium: Electronic Resource

URL: http://dx.doi.org/10.1002/nme.1620100104

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110

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Theory and examples of partial approximation in the finite element method (1976)

Kikuchi, Fumio

Chichester [u.a.] : Wiley-Blackwell

International Journal for Numerical Methods in Engineering 10 (1976), S. 115-122

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ISSN: 0029-5981

Keywords: Engineering ; Engineering General

Source: Wiley InterScience Backfile Collection 1832-2000

Topics: Mathematics , Technology

Notes: This paper presents theory and examples of partial approximation as a modification of the displacement method in the finite element analysis. This method requires different shape functions for different terms in the potential energy expression to curtail the processes in the standard displacement method. Explanation of the theory is given by use of a simple example for Poisson's equation. It can also be effectively utilized to give mathematical foundation to some finite element models based on physical reasonings, such as Melosh's rectangular element for plate bending and beam element approximation of circular arches.

Additional Material: 4 Ill.

Type of Medium: Electronic Resource

URL: http://dx.doi.org/10.1002/nme.1620100109

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111

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Sequential interpolation functions (1976)

Feijoo, Raul A. ; Bevilacqua, Luiz

Chichester [u.a.] : Wiley-Blackwell

International Journal for Numerical Methods in Engineering 10 (1976), S. 133-143

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ISSN: 0029-5981

Keywords: Engineering ; Engineering General

Source: Wiley InterScience Backfile Collection 1832-2000

Topics: Mathematics , Technology

Notes: In the present paper it is shown how to achieve special interpolation functions that can be applied to the finite element method, least squares methods or other related numerical techniques. We call these functions sequential interpolation functions since one of the main characteristics of this technique refers to the fact that the refinement of the solution does not require the redefinition of the interpolation funtions used in a previous step, as the case for instance in the FEM.The present theory and the FEM using an isoparametric element were compared for a plane stress problem. The results show that both have the same degree of accuracy. The choice of the sequential interpolation functions is easier than those used in the finite element formulation and the computer time was reduced by about 50 per cent.

Additional Material: 5 Ill.

Type of Medium: Electronic Resource

URL: http://dx.doi.org/10.1002/nme.1620100111

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112

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Domain mappings for the numerical solution of partial differential equations (1976)

Oberkampf, William L.

Chichester [u.a.] : Wiley-Blackwell

International Journal for Numerical Methods in Engineering 10 (1976), S. 211-223

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ISSN: 0029-5981

Keywords: Engineering ; Engineering General

Source: Wiley InterScience Backfile Collection 1832-2000

Topics: Mathematics , Technology

Notes: Independent variable transformations of partial differential equations are examined with regard to their use in numerical solutions. Systems of first order and second order partial differential equations in conservative and nonconservative form are considered. These general equations are transformed using generalized mapping functions and important computational features of the transformed equations are discussed. Examples of mappings which regularize domains are given involving various types of partial differential equations. These mappings are of particular importance in finite difference approximations because of the ease with which a mesh can be adapted to regions formed by co-ordinate lines.

Additional Material: 5 Ill.

Type of Medium: Electronic Resource

URL: http://dx.doi.org/10.1002/nme.1620100116

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113

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Announcement and call for papers (1976)

Chichester [u.a.] : Wiley-Blackwell

International Journal for Numerical Methods in Engineering 10 (1976), S. 238-240

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ISSN: 0029-5981

Keywords: Engineering ; Engineering General

Source: Wiley InterScience Backfile Collection 1832-2000

Topics: Mathematics , Technology

Type of Medium: Electronic Resource

URL: http://dx.doi.org/10.1002/nme.1620100120

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114

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A simple cubic displacement element for plate bendingBritish Crown Copyright, reproduced with the permission of the Controller, Her Majesty's Stationery Office. (1976)

Allman, D. J.

Chichester [u.a.] : Wiley-Blackwell

International Journal for Numerical Methods in Engineering 10 (1976), S. 263-281

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ISSN: 0029-5981

Keywords: Engineering ; Engineering General

Source: Wiley InterScience Backfile Collection 1832-2000

Topics: Mathematics , Technology

Notes: Early attempts to construct a triangular finite element for plate bending problems from a compatible cubic displacement field are not entirely satisfactory. The present paper shows how an accurate plate element can be achieved using independent cubic polynomial assumptions for the internal and boundary displacements in conjunction with a modified potential energy principle. This approach yields a simple algebraic formulation with favourable connection quantities at the element vertices which will appeal to practical users of the conventional finite element displacement method. Moreover, in Appendix I it is shown that the cubic element is identical to a previous hybrid stress element with linear internal bending and twisting moments and cubic boundary displacements. The stresses obtained from the former hybrid finite element solution therefore satisfy the strain compatibility conditions exactly. This remarkable result has an important significance in the theory of hybrid finite elements.

Additional Material: 2 Ill.

Type of Medium: Electronic Resource

URL: http://dx.doi.org/10.1002/nme.1620100204

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115

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Design of efficient stiffened shells of revolution (1976)

Majumder, D. K. ; Thornton, W. A.

Chichester [u.a.] : Wiley-Blackwell

International Journal for Numerical Methods in Engineering 10 (1976), S. 535-549

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ISSN: 0029-5981

Keywords: Engineering ; Engineering General

Source: Wiley InterScience Backfile Collection 1832-2000

Topics: Mathematics , Technology

Notes: A method to produce efficient piecewise uniform stiffened shells of revolution is presented. The approach uses a first order differential equation formulation for the shell prebuckling and buckling analyses and the necessary conditions for an optimum design are derived by a variational approach. A variety of local yielding and buckling constraints and the general buckling constraint are included in the design process. The local constraints are treated by means of an interior penalty function and the general buckling load is treated by means of an exterior penalty function. This allows the general buckling constraint to be included in the design process only when it is violated. The self adjoint nature of the prebuckling and buckling formulations is used to reduce the computational effort. Results for four conical shells and one spherical shell are given.

Additional Material: 2 Ill.

Type of Medium: Electronic Resource

URL: http://dx.doi.org/10.1002/nme.1620100305

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116

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Local linearization of the finite element method and its applications to compressible flows (1976)

Shen, S. F. ; Habashi, W.

Chichester [u.a.] : Wiley-Blackwell

International Journal for Numerical Methods in Engineering 10 (1976), S. 565-577

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ISSN: 0029-5981

Keywords: Engineering ; Engineering General

Source: Wiley InterScience Backfile Collection 1832-2000

Topics: Mathematics , Technology

Notes: In applications of the finite element method to complicated nonlinear problems, it is proposed to simplify the operator in each element, typically by a linerization process. Local approximations can then be more easily constructed in the usual manner, and a proper assembly can be made. Such an approach would lead to an approximate global variational statement; or if the variational principle exists but is hard to handle, it should suggest an iterative scheme with a built-in physical basis, hence a better chance to converge. The case of high subsonic flow over a circular cylinder is studied in detail by this method. With linear triangular elements, numerical results are obtained for 100 nodal unknowns in each quadrant. The convergence is extremely rapid up to a free stream Mach number of 0.42, slightly above critical. The accuracy is excellent as compared against Imai's analytical results.

Additional Material: 3 Ill.

Type of Medium: Electronic Resource

URL: http://dx.doi.org/10.1002/nme.1620100307

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117

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A simultaneous iteration algorithm for symmetric eigenvalue problems (1976)

Corr, R. B. ; Jennings, A.

Chichester [u.a.] : Wiley-Blackwell

International Journal for Numerical Methods in Engineering 10 (1976), S. 647-663

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ISSN: 0029-5981

Keywords: Engineering ; Engineering General

Source: Wiley InterScience Backfile Collection 1832-2000

Topics: Mathematics , Technology

Notes: A FORTRAN IV algorithm is presented for determining sets of dominant eigenvalues and corresponding eigenvectors of symmetric matrices. It is also extended to the solution of the equations of natural vibration of a structure for which symmetric stiffness and mass matrices are available. The matrices are stored and processed in variable bandwidth form, thus enabling advantage to be gained from sparseness in the equations. Some of the procedures may also be used to solve symmetric positive definite equations such as those arising from the static analysis of structures loaded within the elastic range.

Additional Material: 1 Ill.

Type of Medium: Electronic Resource

URL: http://dx.doi.org/10.1002/nme.1620100313

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118

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Numerical evaluation of a class of singular double integrals by symmetric pairing (1976)

Squire, William

Chichester [u.a.] : Wiley-Blackwell

International Journal for Numerical Methods in Engineering 10 (1976), S. 703-708

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ISSN: 0029-5981

Keywords: Engineering ; Engineering General

Source: Wiley InterScience Backfile Collection 1832-2000

Topics: Mathematics , Technology

Notes: Two quadrature rules based on nodes in a rhombus are used to evaluate integrals over a square with integrands which are singular on a diagonal. The rules are also compared for non-singular integrals with an equivalent product Gauss rule.

Additional Material: 4 Tab.

Type of Medium: Electronic Resource

URL: http://dx.doi.org/10.1002/nme.1620100316

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119

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Announcement (1976)

Chichester [u.a.] : Wiley-Blackwell

International Journal for Numerical Methods in Engineering 10 (1976), S. 719-720

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ISSN: 0029-5981

Keywords: Engineering ; Engineering General

Source: Wiley InterScience Backfile Collection 1832-2000

Topics: Mathematics , Technology

Type of Medium: Electronic Resource

URL: http://dx.doi.org/10.1002/nme.1620100320

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120

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Efficient optimal design of structures by generalized steepest descent programming (1976)

Arora, J. S. ; Haug, E. J.

Chichester [u.a.] : Wiley-Blackwell

International Journal for Numerical Methods in Engineering 10 (1976), S. 747-766

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ISSN: 0029-5981

Keywords: Engineering ; Engineering General

Source: Wiley InterScience Backfile Collection 1832-2000

Topics: Mathematics , Technology

Notes: The purpose of this paper is to present refinements in a steepest descent algorithm for optimal design of structures and numerical experience that demonstrates its numerical efficiency. The algorithm is based on a state space optimization technique that was initially developed and applied to optimal control problems. Design constraints are divided into four distinct subsets, the special characteristics of which are exploited to improve computational efficiency of the algorithm. Some further improvements in structural analysis, design sensitivity analysis, and constrained steepest descent programming calculations are presented. Optimum designs for three test problems are obtained and convergence rates are compared with results presented in the literature.

Additional Material: 4 Ill.

Type of Medium: Electronic Resource

URL: http://dx.doi.org/10.1002/nme.1620100404

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121

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Rubber covered rolls - the thermoviscoelastic problem. A finite element solution (1976)

Batra, R. C. ; Levinson, M. ; Betz, Eric

Chichester [u.a.] : Wiley-Blackwell

International Journal for Numerical Methods in Engineering 10 (1976), S. 767-785

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ISSN: 0029-5981

Keywords: Engineering ; Engineering General

Source: Wiley InterScience Backfile Collection 1832-2000

Topics: Mathematics , Technology

Notes: The coupled thermomechanical behaviour of a layer of thermorheologically simple material bonded to a uniformly rotating rigid cylinder and indented by another rigid cylinder is studied by the finite element method. The various approximations necessary to reduce the problem to one of tractable size and the computational methods used are discussed in some detail. The complete thermal, deformation and stress fields may be computed. Some results, computed for a grid using ‘rectangular’ elements, presented graphically include the temperature distribution, the stress distribution near the bond surface, the contact pressure distribution and the asymmetric surface deformation of the rubberlike layer.

Additional Material: 8 Ill.

Type of Medium: Electronic Resource

URL: http://dx.doi.org/10.1002/nme.1620100405

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122

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Efficient least squares finite elements for two-dimensional laminar boundary layer analysis (1976)

Lynn, Paul P. ; Alani, Kawan

Chichester [u.a.] : Wiley-Blackwell

International Journal for Numerical Methods in Engineering 10 (1976), S. 809-825

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ISSN: 0029-5981

Keywords: Engineering ; Engineering General

Source: Wiley InterScience Backfile Collection 1832-2000

Topics: Mathematics , Technology

Notes: This paper presents the formulations of essentially one-dimensional least squares and Galerkin-least squares finite elements for the numerical solution of two-dimensional laminar boundary layer equations. An iterative technique to cope with the non-linearity of the boundary layer equations, in conjunction with the least squares finite element method, is proposed. Through exhaustive numerical investigations in the retarded flow over a plate, flow past a circular cylinder, the flow past an elliptic cylinder, the accuracy and applicability of the proposed method are demonstrated.

Additional Material: 8 Ill.

Type of Medium: Electronic Resource

URL: http://dx.doi.org/10.1002/nme.1620100408

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123

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The analysis of rotational shells using a curved ring element and the mixed variational formulation (1976)

Barony, S. Y. ; Tottenham, H.

Chichester [u.a.] : Wiley-Blackwell

International Journal for Numerical Methods in Engineering 10 (1976), S. 861-872

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ISSN: 0029-5981

Keywords: Engineering ; Engineering General

Source: Wiley InterScience Backfile Collection 1832-2000

Topics: Mathematics , Technology

Notes: A finite element for the analysis of rotational shells using a mixed variational formulation is proposed. The element has arbitrary curvature in the meridional plane, its geometry being given by the values of the axial and radial co-ordinates, slope and meridional curvature at the nodal circles. A linear variation in the thickness was included in the formulation as was an orthotropic material. Test cases of flat plates and spherical shells indicate that a high degree of accuracy is obtainable with relatively small number of elements.

Additional Material: 5 Ill.

Type of Medium: Electronic Resource

URL: http://dx.doi.org/10.1002/nme.1620100413

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124

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On the relationship between the finite element and finite difference methods (1976)

Gray, William F. ; Pinder, George F.

Chichester [u.a.] : Wiley-Blackwell

International Journal for Numerical Methods in Engineering 10 (1976), S. 893-923

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ISSN: 0029-5981

Keywords: Engineering ; Engineering General

Source: Wiley InterScience Backfile Collection 1832-2000

Topics: Mathematics , Technology

Notes: The integral equations which arise from application of the Galerkin-finite element scheme to the convective diffusion equation are examined to illustrate how this method represents differential equations. The formulae obtained are effectively spatial averages of standard finite difference equations written at a node. The truncation error in the finite element solution at a node is obtained for various nodal configurations.

Additional Material: 9 Tab.

Type of Medium: Electronic Resource

URL: http://dx.doi.org/10.1002/nme.1620100416

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125

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Artificial adjustment of element stiffness with a particular reference to plate bending (1976)

Cook, Robert D.

Chichester [u.a.] : Wiley-Blackwell

International Journal for Numerical Methods in Engineering 10 (1976), S. 945-949

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ISSN: 0029-5981

Keywords: Engineering ; Engineering General

Source: Wiley InterScience Backfile Collection 1832-2000

Topics: Mathematics , Technology

Notes: A finite element may satisfy all convergence requirements and work well except for being too stiff or too flexible when the mesh is coarse. Here we discuss a technique for softening or stiffening such elements, provided that they have internal degrees-of-freedom. The technique is applied to a previously derived plate element, and the element is found to be much improved.

Additional Material: 2 Ill.

Type of Medium: Electronic Resource

URL: http://dx.doi.org/10.1002/nme.1620100419

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126

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Author's reply to a recent discussion (1976)

Gupta, K. K.

Chichester [u.a.] : Wiley-Blackwell

International Journal for Numerical Methods in Engineering 10 (1976), S. 974-974

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Keywords: Engineering ; Engineering General

Source: Wiley InterScience Backfile Collection 1832-2000

Topics: Mathematics , Technology

Type of Medium: Electronic Resource

URL: http://dx.doi.org/10.1002/nme.1620100426

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Computational mechanics, vol. 461 of lecture notes in mathematics, edited by J. T. Oden (1976)

Chichester [u.a.] : Wiley-Blackwell

International Journal for Numerical Methods in Engineering 10 (1976), S. 976-976

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Source: Wiley InterScience Backfile Collection 1832-2000

Topics: Mathematics , Technology

Type of Medium: Electronic Resource

URL: http://dx.doi.org/10.1002/nme.1620100429

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128

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Effective numerical treatment of boundary integral equations: A formulation for three-dimensional elastostatics (1976)

Lachat, J. C. ; Watson, J. O.

Chichester [u.a.] : Wiley-Blackwell

International Journal for Numerical Methods in Engineering 10 (1976), S. 991-1005

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Keywords: Engineering ; Engineering General

Source: Wiley InterScience Backfile Collection 1832-2000

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Notes: The field equations of three-dimensional elastostatics are transformed to boundary integral equations. The elastic body is divided into subregions, and the surface and interfaces are represented by quadrilateral and triangular elements with quadratic variation of geometry and linear, quadratic or cubic variation of displacement and traction with respect to intrinsic co-ordinates. The integral equation is discretized for each subregion, and a system of banded form obtained. For the integration of kernel-shape function products, Gaussian quadrature formulae are chosen according to upper bounds for error in terms of derivatives of the integrands. Use of the integral formulation is illustrated by the analysis of a prestressed concrete nuclear reactor pressure vessel.

Additional Material: 11 Ill.

Type of Medium: Electronic Resource

URL: http://dx.doi.org/10.1002/nme.1620100503

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129

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A modification of the Monte Carlo method for steady heat conduction problems (1976)

Zinsmeister, G. E. ; Pan, S. S.

Chichester [u.a.] : Wiley-Blackwell

International Journal for Numerical Methods in Engineering 10 (1976), S. 1057-1064

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ISSN: 0029-5981

Keywords: Engineering ; Engineering General

Source: Wiley InterScience Backfile Collection 1832-2000

Topics: Mathematics , Technology

Notes: The unique capability of calculating single points by Monte Carlo Methods is used in an attempt to develop an efficient Monte Carlo method for whole field calculations of heat conduction problems. Rather than calculate the whole field by Monte Carlo, only select points around the boundaries of inscribed figures of standard shapes are are so calculated. Interior points of the inscribed figures are then calculated by analytical (non-numerical) techniques. The procedure is described and shown to be more efficient than previously published Monte Carlo modifications but not as efficient as the Gauss-Seidel method. This new procedure will most likely be competitive for subregion calculations rather than for whole field calculations (for which standard numerical procedures are most efficient) or for single point calculations (for which other Monte Carlo methods are most efficient).

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URL: http://dx.doi.org/10.1002/nme.1620100507

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Computing three-dimensional free surface flows (1976)

Larock, Bruce E. ; Taylor, Cedric

Chichester [u.a.] : Wiley-Blackwell

International Journal for Numerical Methods in Engineering 10 (1976), S. 1143-1152

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Keywords: Engineering ; Engineering General

Source: Wiley InterScience Backfile Collection 1832-2000

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Notes: Finite element techniques are developed for the analysis of high-speed three-dimensional free surface flows within the context of potential flow theory. The primary dependent variable is the velocity potential, which is approximated as a quadratic within each isoparametric element. An iterative approach is used to seek the initially unknown free surface location.A high-speed fluid jet issuing through an orifice plate into a transvese gravity field is examined to illustrate features of the approach. Convergence of the solutions is very good at a Froude number of 3-53 but deteriorates as F nears unity.

Additional Material: 6 Ill.

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URL: http://dx.doi.org/10.1002/nme.1620100513

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On reduced integration in solid isoparametric elements when used in shells with membrane modes (1976)

Irons, B. M. R. ; Hellen, T. K.

Chichester [u.a.] : Wiley-Blackwell

International Journal for Numerical Methods in Engineering 10 (1976), S. 1179-1182

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Keywords: Engineering ; Engineering General

Source: Wiley InterScience Backfile Collection 1832-2000

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Additional Material: 4 Ill.

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URL: http://dx.doi.org/10.1002/nme.1620100516

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A note on optimization of an alkylation process (1976)

Dembo, R. S. ; Avriel, M.

Chichester [u.a.] : Wiley-Blackwell

International Journal for Numerical Methods in Engineering 10 (1976), S. 1191-1193

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Keywords: Engineering ; Engineering General

Source: Wiley InterScience Backfile Collection 1832-2000

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URL: http://dx.doi.org/10.1002/nme.1620100519

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Numerical techniques in probabilistic load flow problems (1976)

Allan, R. N. ; Grigg, C. H. ; Al-Shakarchi, M. R. G.

Chichester [u.a.] : Wiley-Blackwell

International Journal for Numerical Methods in Engineering 10 (1976), S. 853-860

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Notes: This paper describes numerical techniques which have been developed in order to solve the load flow problem of a power system network probabilistically instead of using normal deterministic methods. The aim in the development of these techniques has been to reduce the computational time and storage commensurate with maintaining a high degree of accuracy.

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URL: http://dx.doi.org/10.1002/nme.1620100412

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On the construction of conforming rectangular plate elements (1976)

Watkins, David S.

Chichester [u.a.] : Wiley-Blackwell

International Journal for Numerical Methods in Engineering 10 (1976), S. 925-933

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Keywords: Engineering ; Engineering General

Source: Wiley InterScience Backfile Collection 1832-2000

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Additional Material: 3 Tab.

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URL: http://dx.doi.org/10.1002/nme.1620100417

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Non-linear programming - gradient projection via orthogonalization (1976)

Russell, S. S.

Chichester [u.a.] : Wiley-Blackwell

International Journal for Numerical Methods in Engineering 10 (1976), S. 950-953

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Keywords: Engineering ; Engineering General

Source: Wiley InterScience Backfile Collection 1832-2000

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Notes: Large scale non-linear programming problems with non-linear constraints are of practical concern in the areas of process control and system design. Although advances in computer technology address these problems, more efficient algorithms are needed. An algorithm currently used is Rosen's Gradient Projection Method. This note presents an alternative technique of performing the steps for finding the projected gradient used in Rosen's method, a technique that gives equivalent results with fewer computations.

Additional Material: 1 Ill.

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URL: http://dx.doi.org/10.1002/nme.1620100420

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136

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Difference schemes for second order hyperbolic equations (1976)

Jain, M. K. ; Ahuja, Raj ; Bhattacharyya, S.

Chichester [u.a.] : Wiley-Blackwell

International Journal for Numerical Methods in Engineering 10 (1976), S. 960-964

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Notes: Implicit difference methods for the wave equation in two space variables have been discussed with the help of a stability diagram. The difference methods of intermediate accuracy 0(h4+k2) have been determined. A method of order of accuracy 0(h2+k2) with minimum truncation error has also been found.

Additional Material: 1 Ill.

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Thermodynamics and thermophysical properties of combustion products. Vol. II: Oxygen-based propellants (translated from Russian). V. E. Alemasov et al. Keter Publishing House, Jerusalem Ltd., Price: £14.95 (1976)

Daniels, T. C.

Chichester [u.a.] : Wiley-Blackwell

International Journal for Numerical Methods in Engineering 10 (1976), S. 975-975

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URL: http://dx.doi.org/10.1002/nme.1620100427

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An iterative technique for fitting exponentials (1976)

Lal, M. ; Moore, E.

Chichester [u.a.] : Wiley-Blackwell

International Journal for Numerical Methods in Engineering 10 (1976), S. 979-990

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Keywords: Engineering ; Engineering General

Source: Wiley InterScience Backfile Collection 1832-2000

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Notes: An interative method to fit the function \documentclass{article}\pagestyle{empty}\begin{document}$\mathop \[y = \sum\nolimits_i^n { = 1} a_i e^{lix}\] $\end{document} to data is considered. The technique used is that of inversion of a linear differential operator with constant coefficients. This method reproduces the parameters for mathematically precise data and gives satisfactory results when the data are affected by random errors.

Additional Material: 3 Tab.

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A finite element Galerkin formulation and its numerical performance (1976)

Salaam, U. ; Sandhu, R. S.

Chichester [u.a.] : Wiley-Blackwell

International Journal for Numerical Methods in Engineering 10 (1976), S. 1077-1095

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Notes: A finite element Galerkin formulation admitting non-homogenous boundary conditions and discontinuous approximants is derived from a variational principle. The procedure results in matrix equations explicitly allowing for jump discontinuties across interelement boundaries. As an illustration, a specialization of the procedure similar to a reduced integration technique is used to solve several problems in elastostatics. The improvement in accuracy in comparison with conventional methods is remarkable.

Additional Material: 14 Ill.

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URL: http://dx.doi.org/10.1002/nme.1620100509

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Optimum structural design with stability constraints (1976)

Khot, N. S. ; Venkayya, V. B. ; Berke, L.

Chichester [u.a.] : Wiley-Blackwell

International Journal for Numerical Methods in Engineering 10 (1976), S. 1097-1114

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Source: Wiley InterScience Backfile Collection 1832-2000

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Notes: This paper presents an optimization method based on optimality criterion for minimum weight of structures with stability requirements. A recurrence relation is derived and the method is explained in the context of the displacement method of finite element analysis. The incipient buckling of the structure is determined by a linear eigenvalue solution. The method is programmed for trusses and frames. Illustrative problems are given to show the applicability of the method of design of structures with a large number of design variables.

Additional Material: 5 Ill.

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URL: http://dx.doi.org/10.1002/nme.1620100510

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Beam-column element for inelastic analysis (1976)

Kamat, M. P. ; Swift, G. W. ; Killian, D. E.

Chichester [u.a.] : Wiley-Blackwell

International Journal for Numerical Methods in Engineering 10 (1976), S. 1177-1178

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Keywords: Engineering ; Engineering General

Source: Wiley InterScience Backfile Collection 1832-2000

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Type of Medium: Electronic Resource

URL: http://dx.doi.org/10.1002/nme.1620100515

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Announcements (1976)

Chichester [u.a.] : Wiley-Blackwell

International Journal for Numerical Methods in Engineering 10 (1976), S. 1427-1428

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Source: Wiley InterScience Backfile Collection 1832-2000

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Type of Medium: Electronic Resource

URL: http://dx.doi.org/10.1002/nme.1620100626

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Erratum (1976)

Chichester [u.a.] : Wiley-Blackwell

International Journal for Numerical Methods in Engineering 10 (1976), S. 1420-1426

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Additional Material: 2 Ill.

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URL: http://dx.doi.org/10.1002/nme.1620100624

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Neuerscheinungen (1976)

Weinheim : Wiley-Blackwell

Zeitschrift für die chemische Industrie 88 (1976), S. 32-32

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Keywords: Chemistry ; General Chemistry

Source: Wiley InterScience Backfile Collection 1832-2000

Topics: Chemistry and Pharmacology

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URL: http://dx.doi.org/10.1002/ange.19760880114

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Ein Lithium-Cobalt-Bimetallkomplex (1976)

Bönnemann, Helmut ; Krüger, Carl ; Tsay, Yi-Hung

Weinheim : Wiley-Blackwell

Zeitschrift für die chemische Industrie 88 (1976), S. 50-51

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Additional Material: 1 Ill.

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URL: http://dx.doi.org/10.1002/ange.19760880204

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Anwendungen sechsgliedriger heteroaromatischer Betaine in der Synthese (1976)

Dennis, Nicholas ; Katritzky, Alan R. ; Takeuchi, Yoshito

Weinheim : Wiley-Blackwell

Zeitschrift für die chemische Industrie 88 (1976), S. 41-49

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Notes: Die Cycloadditionen von 3-Hydroxy-1-methylpyridiniumbetainen an elektronenarme Olefine wurden auf Verbindungen ausgedehnt, die anstelle der Methylgruppe andere Substituenten in 1-Stellung tragen. Resonanztheoretische und quantenchemische Betrachtungen führten zum besseren Verständnis bekannter Befunde und zur Voraussage neuer Reaktionen. Beschrieben werden u. a. thermische Additionen von 2π- und 6π-Elektronensystemen and die 2,6-Position und von 4π-Elektronensystemen and die 2,4-Position. Die Cycloaddukte sind als Synthesebausteine hochinteressant.

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OctahydroindigoDiese Arbeit wurde vom Fonds der Chemischen Industrie unterstützt. (1976)

Pfeiffer, Georg ; Otting, Walter ; Bauer, Helmut

Weinheim : Wiley-Blackwell

Zeitschrift für die chemische Industrie 88 (1976), S. 53-53

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URL: http://dx.doi.org/10.1002/ange.19760880207

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Chlor-Isotopieeffekte bei der Ionenaustausch-ChromatographieDiese Arbeit wurde von der Deutschen Forschungsgemeinschaft und dem Fonds der Chemischen Industrie unterstützt. - Herrn Prof. K. H. Lieser, Technische Hochschule Darmstadt, danken wir für die Möglichkeit, die massenspektrometrischen Messungen an seinem Institut durchzuführen. (1976)

Heumann, Klaus G. ; Hoffmann, Rainer

Weinheim : Wiley-Blackwell

Zeitschrift für die chemische Industrie 88 (1976), S. 54-55

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Additional Material: 1 Ill.

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URL: http://dx.doi.org/10.1002/ange.19760880209

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Impressum (1976)

Weinheim : Wiley-Blackwell

Zeitschrift für die chemische Industrie 88 (1976)

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Source: Wiley InterScience Backfile Collection 1832-2000

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URL: http://dx.doi.org/10.1002/ange.19760880101

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Röntgen-Strukturanalyse eines Dialkylthioketens (1976)

Schaumann, Ernst ; Harto, Surya ; Adiwidjaja, Gunadi

Weinheim : Wiley-Blackwell

Zeitschrift für die chemische Industrie 88 (1976), S. 25-25

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Additional Material: 1 Ill.

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Bacteriorhodopsin als Beispiel einer lichtgetriebenen ProtonenpumpeNach einem Vortrag anläßlich der Chemiedozenten-Tagung in Düsseldorf, April 1975. (1976)

Oesterhelt, Dieter

Weinheim : Wiley-Blackwell

Zeitschrift für die chemische Industrie 88 (1976), S. 16-24

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Notes: Außer den lange bekannten Sehpigmenten gibt es einen weiteren Retinal-Protein-Komplex in der Natur: das Bacteriorhodopsin aus Halobakterien. Im Gegensatz zu den Sehpigmenten, etwa den Rhodopsinen, die als Lichtsensoren des Auges wirken, fungiert das Bacteriorhodopsin als Lichtenergiewandler. Diese Funktion ist an den asymmetrischen Einbau des Bacteriorhodopsins in die Gitterstruktur der Purpurmembran gebunden, die Flecken auf der Zelloberfläche der Halobakterien bildet. Das Purpurmembransystem ist - neben dem Chlorophyllsystem - das zweite lichtenergiewandelnde Prinzip der belebten Natur. Bacteriorhodopsin wirkt als lichtgetriebene Protonenpumpe oder als wesentlicher Teil eines solchen Pumpsystems. Durch Lichtabsorption wird ein Reaktionszyklus ausgelöst, an den die räumlich gerichtete Abgabe und Aufnahme eines Protons gekoppelt ist. In der intakten Zelle wird dadurch über die Zellhülle des Bakteriums hinweg ein elektrochemischer Gradient aufgebaut, in welchem ein Teil der absorbierten Lichtenergie gespeichert ist und der nicht wie Atmung oder Photosynthese von Redoxprozessen abhängt. Dieser elektrochemische Gradient kann die Energie zur ATP-Synthese im Inneren der Zelle liefern; als Katalysatorsystem dient eine reversibel protonentranslocierende ATPase.

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Neuerscheinungen (1976)

Weinheim : Wiley-Blackwell

Zeitschrift für die chemische Industrie 88 (1976), S. 130-130

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URL: http://dx.doi.org/10.1002/ange.19760880414

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Rundschau (1976)

Weinheim : Wiley-Blackwell

Zeitschrift für die chemische Industrie 88 (1976), S. 30-31

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URL: http://dx.doi.org/10.1002/ange.19760880111

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Impressum (1976)

Weinheim : Wiley-Blackwell

Zeitschrift für die chemische Industrie 88 (1976)

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URL: http://dx.doi.org/10.1002/ange.19760880201

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Die Analyse der Luft und ihrer Verunreinigungen in der freien Atmosphäre und am Arbeitsplatz. Von W. Leithe. Wissenschaftliche Verlagsgesellschaft mbH, Stuttgart 1974. 2. neubearbeitete und erweiterte Aufl., XV, 303 S., 49 Abb., geb. DM 74. - (1976)

Weinheim : Wiley-Blackwell

Zeitschrift für die chemische Industrie 88 (1976), S. 31-32

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URL: http://dx.doi.org/10.1002/ange.19760880113

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Progress in mass spectrometry. Fortschritte der Massenspektrometrie. Herausgegeben von H. Budzikiewicz. Band 1: Indolalkaloide. Teil 1: Text, Teil 2: Spektren. Von M. Hesse. Verlag Chemie, GmbH, Weinheim 1974. 1. Aufl., Teil 1: XVII, 261 S., 95 Schemata, 42 Tab.; Teil 2: VII, 98 S., 173 Spektren; Lw. zus. DM 98. - . Band 2: Chroman and Related Compounds. Von S. E. Drews, Verlag Chemie, GmbH, Weinheim 1974. 1. Aufl., VII, 138 S., 33 Abb., 102 Schemata, Lw. DM 58. - (1976)

Weinheim : Wiley-Blackwell

Zeitschrift für die chemische Industrie 88 (1976), S. 31-31

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URL: http://dx.doi.org/10.1002/ange.19760880112

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Biomimetische Cyclisierungen von Polyenen (1976)

Johnson, William S.

Weinheim : Wiley-Blackwell

Zeitschrift für die chemische Industrie 88 (1976), S. 33-41

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Notes: Gewisse Polyene mit trans-ständigen Doppelbindungen in 1,5-Stellung zueinander können zu stereospezifischen, nichtenzymatischen, kationischen Cyclisierungen veranlaßt werden, bei denen polycyclische Produkte mit der „natürlichen“ all-trans-Konfiguration entstehen. Diese Umwandlungen ahmen offenbar im Prinzip die biochemische Überführung von Squalen in polycyclische Triterpenoide nach. Acetal- und Allylalkohol-Funktionen sind gute Initiatoren für diese Cyclisierungen, und Methylacetylen-Endgruppen sind besonders nützliche Terminatoren, da sie zu fünfgliedrigen Ringen führen. So war es z. B. möglich, in einem einzigen Schritt ein Tetraencarbaldehydacetal ohne ein einziges chirales Zentrum in ein tetracyclisches Produkt mit sieben chiralen Zentren überzuführen. Diese sterisch hochspezifische Reaktion ergibt nur zwei von 64 möglichen Racematen. Es wurden auch Systeme zur Totalsynthese des Steroidgerüsts aus Substraten mit nur einem Ring entwickelt. Der Mechanismus sowohl dieser biomimetischen als auch der enzymatischen Cyclisierungen ist noch unbekannt; die Argumente für einen Synchronprozeß sind etwas gewichtiger als diejenigen für eine stufenweise Reaktion.

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URL: http://dx.doi.org/10.1002/ange.19760880202

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Ethylen-bis(phenylnatrium)-nickel (1976)

Jonas, Klaus

Weinheim : Wiley-Blackwell

Zeitschrift für die chemische Industrie 88 (1976), S. 51-51

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URL: http://dx.doi.org/10.1002/ange.19760880205

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159

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Tetracarbonylcobaltio-pentacarbonylmanganioquecksilber, (CO)4Co-Hg-Mn(CO)5 (1976)

Zöller, Manfred ; Ziegler, M. L.

Weinheim : Wiley-Blackwell

Zeitschrift für die chemische Industrie 88 (1976), S. 188-189

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Bromyl-Kation, [BrO2]+Professor Josef Goubeau zum 75. Geburtstag gewidmetTieftemperaturcokondensation von Fluorverbindungen, 1. Mitteilung. (1976)

Jacob, Eberhard

Weinheim : Wiley-Blackwell

Zeitschrift für die chemische Industrie 88 (1976), S. 189-190

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(3-Siloxy-3-buten-1-inyl)amine (1976)

Himbert, Gerhard

Weinheim : Wiley-Blackwell

Zeitschrift für die chemische Industrie 88 (1976), S. 59-60

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Impressum (1976)

Weinheim : Wiley-Blackwell

Zeitschrift für die chemische Industrie 88 (1976)

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NeuronenmodelleProfessor Feodor Lynen zum 65. Geburtstag gewidmet (1976)

Hamprecht, Bernd

Weinheim : Wiley-Blackwell

Zeitschrift für die chemische Industrie 88 (1976), S. 211-223

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Notes: Das Nervensystem besteht aus mehreren Zellarten, die bei biochemischen Studien möglichst gesondert untersucht werden sollten. Da man bislang diese Zellarten noch nicht zu isolieren versteht, benutzt man beliebig wie Bakterien vermehrbare, von jeweils einer Einzelzelle abgeleitete Zell-Linien, die aus Tumoren des Nervensystems isoliert wurden. Zu diesen gehören aus einem Mäuseneuroblastom isolierte Zell-Linien, die manche Eigenschaften von Nervenzellen besitzen. Hybridzellen, die durch Fusion von Mäuseneuroblastoma- mit Rattengliomazellen erhalten wurden, zeigen in verstärktem Maße Charakteristika von Nervenzellen. Es werden Eigenschaften vorgestellt, die es rechtfertigen, die Hybridzellen als Neuronenmodelle zu betrachten. Sodann wird die Anwendung der Zellen auf Probleme des Nervensystems demonstriert: 1. Verarbeitung von Informationen, die in Form einander entgegengesetzter hormoneller Signale eintreffen; 2. Wirkungsweise des Morphins.

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Das Konformationsverhalten von 5,10,11,12-Tetrahydrodibenzo[a, d]cycloocten (1976)

Elhadi, Farouk Eltayeb ; David Ollis, W. ; Fraser Stoddart, J.

Weinheim : Wiley-Blackwell

Zeitschrift für die chemische Industrie 88 (1976), S. 224-225

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Synthese des S3N2+-RadikalkationsDiese Arbeit wurde von der Deutschen Forschungsgemeinschaft und vom Fonds der Chemischen Industrie unterstützt. (1976)

Roesky, Herbert W. ; Hamza, Abbas

Weinheim : Wiley-Blackwell

Zeitschrift für die chemische Industrie 88 (1976), S. 226-227

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Neuerscheinungen (1976)

Weinheim : Wiley-Blackwell

Zeitschrift für die chemische Industrie 88 (1976), S. 234-234

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Synthese von Alkylidenmalondialdehyd-tetramethylbisacetalen (1976)

Reichardt, Christian ; Preßler, Wilfried ; Würthwein, Ernst-Ulrich

Weinheim : Wiley-Blackwell

Zeitschrift für die chemische Industrie 88 (1976), S. 88-89

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Oxidation von 5-Aminotetrazolen, ein neuer Weg zu IsocyanidenDiese Arbeit wurde von der Deutschen Forschungsgemeinschaft unterstützt. (1976)

Höfle, Gerhard ; Lange, Bernd

Weinheim : Wiley-Blackwell

Zeitschrift für die chemische Industrie 88 (1976), S. 89-90

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Vier linear anellierte Cyclobutanringe: Das Tetracyclo[4.4.0.02,5.07,10]decan-SystemDiese Arbeit wurde von der Deutschen Forschungsgemeinschaft und dem Fonds der Chemischen Industrie unterstützt. Wir danken Herrn Prof. Dr. H. Schmid, Zürich, und Herrn Dr. D. Belluŝ, Basel, für Diskussionen, Herrn Prof. Dr. J. Sauer, Regensburg, für die Überlassung unveröffentlichter Resultate. Kleine Ringe, 18. Mitteilung. - 17. Mitteilung: H.-D. Martin, S. Kagabu u. H.-J. Schiwek, Tetrahedron Lett. 1975, 3311. (1976)

Martin, Hans-Dieter ; Hekman, Mirko

Weinheim : Wiley-Blackwell

Zeitschrift für die chemische Industrie 88 (1976), S. 447-448

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Chemotherapie von Viruskrankheiten (1976)

Diana, Guy D. ; Pancic, Francis

Weinheim : Wiley-Blackwell

Zeitschrift für die chemische Industrie 88 (1976), S. 458-465

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Notes: In diesem Aufsatz soll nach der Beschreibung der von uns verwendeten Screening-Methode ein Überblick über die wichtigsten Fortschritte auf dem Gebiet der viralen Chemotherapie gegeben werden. Die Darstellung wird sich auf Arzneimittel beschränken, die zur Zeit in Gebrauch sind, sowie auf Arzneimittel, deren Wirksamkeit gegen wichtige pathogene Viren nachgewiesen worden ist und die nun am Menschen erprobt werden.

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Neuerscheinungen (1976)

Weinheim : Wiley-Blackwell

Zeitschrift für die chemische Industrie 88 (1976), S. 310-310

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Impressum (1976)

Weinheim : Wiley-Blackwell

Zeitschrift für die chemische Industrie 88 (1976)

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Regioselektive Chlorierung mittelständiger Methylengruppen in DicarbonsäurenDiese Arbeit wurde vom Minister für Wissenschaft und Forschung des Landes Nordrhein-Westfalen und dem Fonds der Chemischen Industrie unterstützt. (1976)

Kämper, Friedhelm ; Schäfer, Hans J. ; Luftmann, Heinrich

Weinheim : Wiley-Blackwell

Zeitschrift für die chemische Industrie 88 (1976), S. 334-335

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Synthese von (Poly-)Peptiden mit Phosphorigsäurediester-triazolidenDiese Arbeit wurde von der Deutschen Forschungsgemeinschaft, der Bayer AG und der Degussa unterstützt. (1976)

Kricheldorf, Hans R. ; Fehrle, Martin ; Kaschig, Jürgen

Weinheim : Wiley-Blackwell

Zeitschrift für die chemische Industrie 88 (1976), S. 337-338

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Nucleophile Aminoalkylierung. Lithiiertes N,N-Dimethyl-thiopivalamidDiese Arbeit wurde von der Deutschen Forschungsgemeinschaft (Projekte Se 158/7, 10 und 12) und dem Fonds der Chemischen Industrie unterstützt. Herrn G. W. H. Protschuk danken wir für Mitarbeit bei einigen Versuchen. (1976)

Seebach, Dieter ; Lubosch, Winfried

Weinheim : Wiley-Blackwell

Zeitschrift für die chemische Industrie 88 (1976), S. 339-340

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Wechselwirkung der Walsh-Orbitale in Bicyclopropyl (1976)

Asmus, Peter ; Klessinger, Martin

Weinheim : Wiley-Blackwell

Zeitschrift für die chemische Industrie 88 (1976), S. 343-344

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Neuerscheinungen (1976)

Weinheim : Wiley-Blackwell

Zeitschrift für die chemische Industrie 88 (1976), S. 346-346

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Impressum (1976)

Weinheim : Wiley-Blackwell

Zeitschrift für die chemische Industrie 88 (1976)

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Herstellung von Öl durch Hydrierung von Steinkohle (1976)

Schlupp, K. F. ; Wien, H.

Weinheim : Wiley-Blackwell

Zeitschrift für die chemische Industrie 88 (1976), S. 347-353

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Notes: Eine Bestandsaufnahme der Verfahren zur Kohlehydrierung ergab: Trotz der umfangreichen Erfahrungen, die in Deutschland bis 1945 auf dem Gebiet der Kohlehydrierung gesammelt und die teilweise in den USA aufgegriffen und weiterentwickelt wurden, gibt es derzeit weltweit kein ausgereiftes Verfahren, das zur kommerziellen Kohleöl-Erzeugung herangezogen werden könnte. Als geeignete Verfahrensrichtungen für die Weiterentwicklung empfehlen sich die nichtkatalytische einstufige Kurzhydrierung und die katalytische Hydrierung. Unter günstigsten Voraussetzungen kann ab Anfang oder Mitte der achtziger Jahre die Produktion von Kohleöl technisch realisiert werden. Unter Berücksichtigung der Preise für schweres Heizöl sind die kommerziellen Voraussetzungen für die Kohleöl-Produktion derzeit nur in Ländern mit niedrigen Kohlepreisen gegeben.

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Eutrophierung und Abwasserreinigung (1976)

Gleisberg, Dietrich ; Kandler, Joachim ; Ulrich, Hannsjörg ; [et al.]

Weinheim : Wiley-Blackwell

Zeitschrift für die chemische Industrie 88 (1976), S. 354-365

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Notes: Die durch zivilisatorische Einflüsse beschleunigte Eutrophierung vor allem stehender Gewässer beruht im wesentlichen auf erhöhter Nährstoffzufuhr. Zur Zurückdrängung wird eine Verringerung der Phosphor- und teilweise der Stickstoffzufuhr vorgeschlagen. Sofern diese Elemente aus Abwässern stammen, kann das durch deren weitergehende Reinigung erreicht werden. Während für die Entfernung des Stickstoffs in erster Linie die Nitrifikation und Denitrifikation in Frage kommen, empfiehlt sich zur Elimination des Phosphors die Phosphatfällung, die technisch ausgereift, wirtschaftlich und auch in bestehenden Kläranlagen einsetzbar ist. Der Erfolg der Maßnahme für die Gewässer hängt dabei besonders von der Erreichung sehr niedriger Phosphorgehalte ab.

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Pentacarbonyl-monosulfan-wolfram, W(CO)5SH2Diese Arbeit wurde vom Fonds der Chemischen Industrie unterstützt. G. S. dankt der Studienstiftung des Deutschen Volkes für ein Promotionsstipendium. (1976)

Herberhold, Max ; Süß, Georg

Weinheim : Wiley-Blackwell

Zeitschrift für die chemische Industrie 88 (1976), S. 375-376

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Instrumental Methods of Analysis. Von H. H. Willard, L. L. Merritt, Jr. und J. A. Dean. D. van Nostrand Company, New York-Wokingham 1974. 5. Aufl. XIX, 860 S., zahlr. Abb., geb. £ 8.50 (1976)

Fahr, Egon

Weinheim : Wiley-Blackwell

Zeitschrift für die chemische Industrie 88 (1976), S. 195-196

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Zur Existenz isomerer Diazene (Diimine)Professor Egon Wiberg zum 75. Geburtstag gewidmet (1976)

Wiberg, Nils ; Fischer, Gerd ; Bachhuber, Heinz

Weinheim : Wiley-Blackwell

Zeitschrift für die chemische Industrie 88 (1976), S. 386-387

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Neuerscheinungen (1976)

Weinheim : Wiley-Blackwell

Zeitschrift für die chemische Industrie 88 (1976), S. 388-388

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α,α-Doppeldeprotonierte Nitroalkane. Erhöhung der Nitronat-C-NucleophilieTeil der geplanten Dissertation von F. Lehr, Universität Gießen. - Diese Arbeit wurde vom Fonds der Chemischen Industrie unterstützt. (1976)

Seebach, Dieter ; Lehr, Friedrich

Weinheim : Wiley-Blackwell

Zeitschrift für die chemische Industrie 88 (1976), S. 540-541

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Rundschau (1976)

Weinheim : Wiley-Blackwell

Zeitschrift für die chemische Industrie 88 (1976), S. 545-546

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Reaktionstypen in der anorganischen Chemie. Von I. Fitz. Akademie-Verlag, Berlin 1975. 1. Aufl., 465 S., 98 Abb., 105 Tab., geb. DM 58. - (1976)

Lindner, Ekkehard

Weinheim : Wiley-Blackwell

Zeitschrift für die chemische Industrie 88 (1976), S. 547-547

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Eine neue elektrochemische Methode zur Bildung von SiSi-Bindungen (1976)

Hengge, Edwin ; Litscher, Georg

Weinheim : Wiley-Blackwell

Zeitschrift für die chemische Industrie 88 (1976), S. 414-414

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Kristallstruktur eines Platin-Komplexes mit NCl2-Liganden: [Pt(NH3)3(NCl2)2Cl]ClDiese Arbeit wurde von der Deutschen Forschungsgemeinschaft und dem Fonds der Chemischen Industrie unterstützt. (1976)

Zipprich, Mathias ; Pritzkow, Hans ; Jander, Jochen

Weinheim : Wiley-Blackwell

Zeitschrift für die chemische Industrie 88 (1976), S. 225-226

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Hydrophobe Wechselwirkungen zwischen Metall-Komplexen mit aromatischen Liganden und 3-(Trimethylsilyl)-1-propansulfonat und ihr 1H-NMR-spektroskopischer NachweisDiese Arbeit wurde durch den Schweizerischen Nationalfonds zur Förderung der wissenschaftlichen Forschung unterstützt. (1976)

Mitchell, Paul R. ; Sigel, Helmut

Weinheim : Wiley-Blackwell

Zeitschrift für die chemische Industrie 88 (1976), S. 585-586

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Neuerscheinungen (1976)

Weinheim : Wiley-Blackwell

Zeitschrift für die chemische Industrie 88 (1976), S. 588-588

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Zur Stabilität der Triquinacenyl-Kationen und Triquinacenyl-Radikale (1976)

Bischof, Peter

Weinheim : Wiley-Blackwell

Zeitschrift für die chemische Industrie 88 (1976), S. 609-610

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ISSN: 0044-8249

Keywords: Chemistry ; General Chemistry

Source: Wiley InterScience Backfile Collection 1832-2000

Topics: Chemistry and Pharmacology

Additional Material: 1 Ill.

Type of Medium: Electronic Resource

URL: http://dx.doi.org/10.1002/ange.19760881805

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Synthese des cis-Trioxa-tris-σ-homotropilidensDiese Arbeit wurde von der Deutschen Forschungsgemeinschaft und dem Fonds der Chemischen Industrie unterstützt. Den Herren Dr. H. Fritz und Dr. W. Richter, Ciba-Geigy, Basel, haben wir für NMR- bzw. GC/MS-Analysen sehr zu danken. Ch. Rücker dankt der Studienstiftung des Deutschen Volkes für ein Promotionsstipendium. (1976)

Prinzbach, Horst ; Rücker, Christoph

Weinheim : Wiley-Blackwell

Zeitschrift für die chemische Industrie 88 (1976), S. 611-612

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ISSN: 0044-8249

Keywords: Chemistry ; General Chemistry

Source: Wiley InterScience Backfile Collection 1832-2000

Topics: Chemistry and Pharmacology

Additional Material: 1 Tab.

Type of Medium: Electronic Resource

URL: http://dx.doi.org/10.1002/ange.19760881807

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Struktur des N,N′, N″, N‴-Tetramethyl-2,3,7,8,12,13,17,18-octakis(carboxymethyl)porphyrinogen-dihydratsDiese Arbeit wurde von der Deutschen Forschungsgemeinschaft und dem Fonds der Chemischen Industrie unterstützt. Wir danken Herrn Prof. B. Franck und Herrn Dr. Ch. Wegner für die Überlassung der kristalle. (1976)

Sawitzki, Giesela ; Von Schnering, Hans Georg

Weinheim : Wiley-Blackwell

Zeitschrift für die chemische Industrie 88 (1976), S. 616-617

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ISSN: 0044-8249

Keywords: Chemistry ; General Chemistry

Source: Wiley InterScience Backfile Collection 1832-2000

Topics: Chemistry and Pharmacology

Additional Material: 1 Ill.

Type of Medium: Electronic Resource

URL: http://dx.doi.org/10.1002/ange.19760881812

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Graphisches Inhaltsverzeichnis (1976)

Weinheim : Wiley-Blackwell

Zeitschrift für die chemische Industrie 88 (1976), S. I

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ISSN: 0044-8249

Keywords: Chemistry ; General Chemistry

Source: Wiley InterScience Backfile Collection 1832-2000

Topics: Chemistry and Pharmacology

Type of Medium: Electronic Resource

URL: http://dx.doi.org/10.1002/ange.19760880802

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Zum Ablauf ionischer Polymerisationsreaktionen. Von G. Heublein. Akademie-Verlag, Berlin 1975. 1. Aufl., VIII, 316 S., zahlr. Abb. u. Tab., geb. ca. DM 58. - (1976)

Braun, Dietrich

Weinheim : Wiley-Blackwell

Zeitschrift für die chemische Industrie 88 (1976), S. 619-620

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ISSN: 0044-8249

Keywords: Chemistry ; General Chemistry

Source: Wiley InterScience Backfile Collection 1832-2000

Topics: Chemistry and Pharmacology

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URL: http://dx.doi.org/10.1002/ange.19760881816

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IR-Spektroskopie - Eine Einführung. (taschentext 43/44.) Von H. Günzler und H. Böck. Verlag Chemie/Physik Verlag, Weinheim 1975. 1. Aufl., XV, 363 S., 152 Abb., 50 Tab., brosch. DM 38. - (1976)

Lehmann, Gerhard

Weinheim : Wiley-Blackwell

Zeitschrift für die chemische Industrie 88 (1976), S. 620-620

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ISSN: 0044-8249

Keywords: Chemistry ; General Chemistry

Source: Wiley InterScience Backfile Collection 1832-2000

Topics: Chemistry and Pharmacology

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URL: http://dx.doi.org/10.1002/ange.19760881817

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Oxidative Addition der mittleren Bindung eines Bicyclopentansystems an Eisen (1976)

Aumann, Rudolf ; Averbeck, Heinz

Weinheim : Wiley-Blackwell

Zeitschrift für die chemische Industrie 88 (1976), S. 641-641

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ISSN: 0044-8249

Keywords: Chemistry ; General Chemistry

Source: Wiley InterScience Backfile Collection 1832-2000

Topics: Chemistry and Pharmacology

Additional Material: 1 Ill.

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URL: http://dx.doi.org/10.1002/ange.19760881905

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199

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5,8-Bis(7-cycloheptatrienyliden)-1,3,6-cyclooctatrien (1976)

Kitahara†, Yoshio ; Oda, Masaji ; Miyazaki, Hideo

Weinheim : Wiley-Blackwell

Zeitschrift für die chemische Industrie 88 (1976), S. 536-537

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ISSN: 0044-8249

Keywords: Chemistry ; General Chemistry

Source: Wiley InterScience Backfile Collection 1832-2000

Topics: Chemistry and Pharmacology

Additional Material: 1 Tab.

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URL: http://dx.doi.org/10.1002/ange.19760881605

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200

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Trialkylallene aus 1,1-disubstituierten Propargylacetaten (1976)

Delbecq, Françoise ; Gore, Jacques

Weinheim : Wiley-Blackwell

Zeitschrift für die chemische Industrie 88 (1976), S. 537-538

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ISSN: 0044-8249

Keywords: Chemistry ; General Chemistry

Source: Wiley InterScience Backfile Collection 1832-2000

Topics: Chemistry and Pharmacology

Additional Material: 1 Tab.

Type of Medium: Electronic Resource

URL: http://dx.doi.org/10.1002/ange.19760881606

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