Go toArchive
Browse byFacets
Bookbag ( 0 )
Facet   section ZfN Section A:Volume 031  [X]
Results  300 Items
Sorted by   
Publication Year
1976 (300)
81Author    C. JungeRequires cookie*
 Title    The Role of the Oceans as a Sink for Chlorofluormethanes and similar Compounds  
 Abstract    Model calculations show that the oceans do not represent a global sink for chlorofluoromethanes (CFM 11 and 12) of any significance. The amount absorbed by the oceans consists essentially of three portions: The portion dissolved in the mixing layer; the one that enters the deep sea and the portion which is decomposed or disappears otherwise within the mixing layer by chemical or bio-logical processes. The calculations show that the total amount of CFM which may have entered the oceans up to the present time cannot have exceeded a few percent even if high destruction rates would occur in the oceans. Solubility data in ocean water in conjunction with concentration data in the oceans indicate, however, that the net destruction rate of CFM 11 in the oceans is only of the order of 10 —7 sec -1 . 
  Reference    (Z. Naturforsch. 31a, 482—487 [1976]; received February 2 1976) 
  Published    1976 
  Similar Items    Find
 DEBUG INFO      
 TEI-XML for    default:Reihe_A/31/ZNA-1976-31a-0482.pdf 
 Identifier    ZNA-1976-31a-0482 
 Volume    31 
82Author    Muthana ShanshalRequires cookie*
 Title    Contribution of the Walsh Orbitals to the Excited States of Conjugated Cyclopropyl Molecules (A PMO Treatment)  
 Abstract    The molecular orbital energies of some conjugated cyclopropyl derivatives are evaluated using 2nd order perturbation. The basis includes the Hiickel MOs of the conjugated segment and the Walsh MOs of cyclopropane. The obtained MO sequence is used to discuss the UV absorption spectra of the molecules. It is found that the absorption bands of most of these molecules cor-respond to A-71* or A-A* excitations and not to .T-TI* transitions as had been assumed. 
  Reference    (Z. Naturforsch. 31a, 488—493 [1976]; received November 13 1975) 
  Published    1976 
  Similar Items    Find
 DEBUG INFO      
 TEI-XML for    default:Reihe_A/31/ZNA-1976-31a-0488.pdf 
 Identifier    ZNA-1976-31a-0488 
 Volume    31 
83Author    Muthana ShanshalRequires cookie*
 Title    The Configuration of Organic Carbanions  
 Abstract    The configurations of organic carbanions are studied using the MINDO/1 and MINDO/2 methods. It is found that the stability of the pyramidal configuration increases on going to small ring cyclic carbanions. Conjugation to an olefinic group decreases the inversion barriers of pyramidal carbanions but does not lead to their planarization. Conjugation to a nitro group, how-ever, causes the planarization of the carbanions. It is found that the monosolvation of methyl-carbanion increases its planarization energy. 
  Reference    (Z. Naturforsch. 31a, 494—497 [1976]; received February 26. 1976) 
  Published    1976 
  Similar Items    Find
 DEBUG INFO      
 TEI-XML for    default:Reihe_A/31/ZNA-1976-31a-0494.pdf 
 Identifier    ZNA-1976-31a-0494 
 Volume    31 
84Author    F. WinterbergRequires cookie*
 Title      
 Abstract    In fast heavy nucleus-nucleus collisions transient magne-tic fields as high as ~10 18 Gauss are predicted. The occur-rence of these superstrong magnetic fields may lead to the production of magnetic monopoles and to CP conservation with zero Cabibbo angle. If large nuclei collide with a velocity large com-pared to the sound velocity in nuclear matter shock waves are predicted to develop Assuming for simplicity an ideal Fermi gas for the nuclear matter one would have to put for the specific heat ratio y = cp/cv = 5/3. This would then lead to a density increase in the shock wave given by n/n0 = (y + 1)/ (y— 1) =4, where n0 = r0~ 3 is the equilibrium number density of the nucleons in nuclear matter, and r0^1.5x 10~ 13 cm. Since the sound velocity in nuclear matter is of the order ~c/10 (c velocity of light) heavy ions accelerated to several 100 MeV/nucleon would move with v ^ c, such that the Mach number would be of the order ~ 10. If a heavy nucleus with radius R0 is being shot onto another nucleus with radius such that Rt> R0, the penetration of the smaller nucleus into the larger one will result in a bow shock with the material in it moving at the velocity v ^ c and with a density ~4 times nuclear density. This mass flow in the shock is accompanied by a proton cur-rent with a current density given by 
  Reference    (Z. Naturforsch. 31a, 498 [1976]; received March 24 1976 received March 24 1976) 
  Published    1976 
  Similar Items    Find
 DEBUG INFO      
 TEI-XML for    default:Reihe_A/31/ZNA-1976-31a-0498_n.pdf 
 Identifier    ZNA-1976-31a-0498_n 
 Volume    31 
85Author    R. Haberkorn, M. E. Midiel-BeyerleRequires cookie*
 Title    Time Resolved Magnetic Field Effects as a Probe for Geminate Recombination  
 Abstract    A theoretical description for the magnetic field depen-dence of geminate recombination as observed in transient spectroscopy of electron transfer reactions, is given and ap-plications of this novel magnetic field effect are discussed. 
  Reference    (Z. Naturforsch. 31a, 499—500 [1976]; received March 29 1976) 
  Published    1976 
  Similar Items    Find
 DEBUG INFO      
 TEI-XML for    default:Reihe_A/31/ZNA-1976-31a-0499_n.pdf 
 Identifier    ZNA-1976-31a-0499_n 
 Volume    31 
86Author    H. Lehmann, H. SchoenebeckRequires cookie*
 Title    Der Gültigkeitsbereich der Moliereschen Näherung  
 Abstract    The Range of Validity of the Moliere Approximation The Moliere approximation of the scattering amplitude is, following earlier statements, a high-energy and small-angle approximation. Recent investigations show that there is no intrinsic small-angle restriction, the restriction being due to special derivations. A method is given, to obtain the scattering amplitude in the Moliere approximation without small-angle assumption. This enables to evaluate electron backscattering rates with the aid of the Moliere scattering amplitude. 
  Reference    (Z. Naturforsch. 31a, 501—502 [1976]; eingegangen am 25. März 1976) 
  Published    1976 
  Similar Items    Find
 DEBUG INFO      
 TEI-XML for    default:Reihe_A/31/ZNA-1976-31a-0501_n.pdf 
 Identifier    ZNA-1976-31a-0501_n 
 Volume    31 
87Author    C. Trichć, G. PerarnauRequires cookie*
 Title    Spektrum explodierender Drähte in verschiedenen Atmosphären. Messung des Dissoziationsgrades des umgebenden Gases und des Drucks im Plasma Spectrum of Exploding Wires within Different Atmospheres. Measure of Dissociation Rate of Surrounding Gas and of Plasma Pressure  
 Abstract    The explosion of a copper wire is caused by means of a discharge from a pulsed source. We observe a continuous spectrum with characteristic emission and absorption lines. The de'gree of dissociation of the surrounding gas and the pressure of the plasma can be determined from the width of an absorption line. 
  Reference    (Z. Naturforsch. 31a, 503—504 [1976]; eingegangen am 12. Januar 1976) 
  Published    1976 
  Similar Items    Find
 DEBUG INFO      
 TEI-XML for    default:Reihe_A/31/ZNA-1976-31a-0503_n.pdf 
 Identifier    ZNA-1976-31a-0503_n 
 Volume    31 
88Author    Th WasserrabRequires cookie*
 Title    Die Trägerdichte von eigenleitendem Siliciuin  
 Abstract    Carrier Concentration of Intrinsic Silicon Since the measurements of Morin and Maita in 1954 it is customary to consider n; = 1.5 • 10 10 cm -3 at r=300K as a standard value of the carrier concentration for intrinsic silicon. Recent measurements and theoretical examinations show a value of n\ ÄS 1.0-lO 10 cm -3 to be more realistic and of higher precision. 
  Reference    (Z. Naturforsch. 31a, 505—506 [1976]; eingegangen am 25. März 1976) 
  Published    1976 
  Similar Items    Find
 DEBUG INFO      
 TEI-XML for    default:Reihe_A/31/ZNA-1976-31a-0505_n.pdf 
 Identifier    ZNA-1976-31a-0505_n 
 Volume    31 
89Author    H. G. Becker, K. BleulerRequires cookie*
 Title    0(4)-Symmetrie und Stark-Effekt des H-Atoms  
 Abstract    0(4)-Symmetry and Stark-Effect of the H-Atom Using the advantages of the O (4)-symmetry the second order Stark-effect of the hydrogen atom is calculated by the Dalgarno-Lewis perturbation method in a purely algebraic manner. The Stark-effect provides the first quantum mechanical example in which the Dalgarno-Lewis equation relevant for second and third order perturbation theory of the whole spectrum can be exactly solved. 
  Reference    (Z. Naturforsch. 31a, 517—523 [1976]; eingegangen am 22. April 1976) 
  Published    1976 
  Similar Items    Find
 DEBUG INFO      
 TEI-XML for    default:Reihe_A/31/ZNA-1976-31a-0517.pdf 
 Identifier    ZNA-1976-31a-0517 
 Volume    31 
90Author    FriedrichW. Hehl, G.David Kerlick, Paul Von Der HeydeRequires cookie*
 Title    On Hypermomentum in General Relativity II. The Geometry of Spacetime  
 Abstract    In Part I** of this series we have introduced the new notion of hypermomentum A'ik as a dynamical quantity characterizing classical matter fields. In Part II, as a preparation for a general relativistic field theory, we look for a geometry of spacetime which will allow for the accomodation of hypermomentum into general relativity. A general linearly connected spacetime with a metric (L4, g) is shown to be the appropriate geometrical framework. 
  Reference    (Z. Naturforsch. 31a, 524—527 [1976]; received March 29 1976) 
  Published    1976 
  Similar Items    Find
 DEBUG INFO      
 TEI-XML for    default:Reihe_A/31/ZNA-1976-31a-0524.pdf 
 Identifier    ZNA-1976-31a-0524 
 Volume    31 
91Author    H. StumpfRequires cookie*
 Title    On the Calculation of Nonlinear Spinor Field Functionals. Ill  
 Abstract    The limitations of the Green functions method concerning nonlinear spinor theory are discussed. To remove these difficulties, functional quantum theory of the nonlinear spinor field was intro-duced in preceding papers. To obtain numerical values for the global observables in this theory, the functional eigenstates have to be calculated. In this paper especially for functional scattering states appropriate equations are derived. A general integration method of the spinor field functional equation is introduced, leading to an equation for the irreducible part of the state functional. Generating functionals are defined, allowing a separation of selfenergy and interactionenergy terms in the equation of the irreducible part. By spectral decomposition of the scattering func-tionals the boundary conditions are examined, which lead in connection with selfenergy and inter-actionenergy terms to the construction of channel equations for the irreducible part of elastic scattering functionals. The method is extented to inelastic processes, it can be tested in the case of nonrelativistic scattering theory. The procedure for the three particle case is discussed in some details. 
  Reference    (Z. Naturforsch. 31a, 528—539 [1976]; received April 6 1976) 
  Published    1976 
  Similar Items    Find
 DEBUG INFO      
 TEI-XML for    default:Reihe_A/31/ZNA-1976-31a-0528.pdf 
 Identifier    ZNA-1976-31a-0528 
 Volume    31 
92Author    H. VestnerRequires cookie*
 Title    Theory of the Viscomagnetic Heat Flux  
 Abstract    The heat transport in the presence of a viscous flow and a magnetic field is studied for a rare-fied polyatomic gas enclosed between infinite parallel plates. The total "viscomagnetic heat flux" is the sum of a bulk and a surface heat flux. According to moment equations of the Waldmann-Snider kinetic equation, the bulk heat flux is due to gradients of pressure (i. e. second order derivatives of flow velocity) and of tensor polarization. For the tensor polarization a second order differential equation is solved with boundary conditions obtained by Waldmann's thermodynamic method. This method also supplies an ansatz for the surface heat flux. In a thermally isolated box the viscomagnetic heat flux gives rise to a temperature gradient in ^-direction if the magnetic field is in z-direction and the gas is flowing in x-direction. The bulk contributions to this transverse temperature gradient have already been given by Levi, McCourt and Beenakker. Now, the surface contributions and the total effect are studied quantitatively for some gases. In particular, it is discussed how a new surface parameter could be determined from future experimental data. 
  Reference    (Z. Naturforsch. 31a, 540—552 [1976]; received December 22 1975) 
  Published    1976 
  Similar Items    Find
 DEBUG INFO      
 TEI-XML for    default:Reihe_A/31/ZNA-1976-31a-0540.pdf 
 Identifier    ZNA-1976-31a-0540 
 Volume    31 
93Author    ChV S Ramachandrá RaoRequires cookie*
 Title    Matrix Elements of the Lorentzian Term  
 Abstract    Recursion formulae for the matrix elements of the Lorentzian term 1 /(C 2 + q 2) as well as l/(C 2 + 9 2) 2 , on the basis of harmonic oscillator eigenfunctions, are obtained. A practical applica-tion where these formulae would be useful is discussed. 
  Reference    (Z. Naturforsch. 31a, 553—556 [1976]; received January 17 1976) 
  Published    1976 
  Similar Items    Find
 DEBUG INFO      
 TEI-XML for    default:Reihe_A/31/ZNA-1976-31a-0553.pdf 
 Identifier    ZNA-1976-31a-0553 
 Volume    31 
94Author    W. BraunRequires cookie*
 Title    Dual Absorptive Model  
 Abstract    A dual absorptive amplitude, in which s-channel resonances are generated by summing up t-channel n-Reggeon cuts, is constructed. Adjusting the two free parameters of the model in the resonance region of TI JI scattering, the various JI JI differential high energy cross sections are calculated. The model is also applied to JI N charge exchange, where a fit to the high energy data is obtained even without Reggeon-Pomeron cuts. 
  Reference    (Z. Naturforsch. 31a, 557—564 [1976]; received January 16 1976) 
  Published    1976 
  Similar Items    Find
 DEBUG INFO      
 TEI-XML for    default:Reihe_A/31/ZNA-1976-31a-0557.pdf 
 Identifier    ZNA-1976-31a-0557 
 Volume    31 
95Author    N. K. Narain, Suresh Jain, ChandraRequires cookie*
 Title    Udit  
 Abstract    The ionization equilibrium of helium is investigated using new ionization and modified dielec-tronic recombination rate coefficients. The results are discussed in the light of available data. 
  Reference    (Z. Naturforsch. 31a, 565—568 [1976]; received March 16 1976) 
  Published    1976 
  Similar Items    Find
 DEBUG INFO      
 TEI-XML for    default:Reihe_A/31/ZNA-1976-31a-0565.pdf 
 Identifier    ZNA-1976-31a-0565 
 Volume    31 
96Author    W. Fuß, K. HohlaRequires cookie*
 Title    Pressure Broadening of the 1.3 (im Iodine Laser Line  
 Abstract    The storable energy of a high-power laser is inversely proportional to its stimulated emission cross-section o. By adding a foreign gas, the emission line is broadened and is thereby lowered. We have measured o of the iodine laser as a function of the pressure of several gases (Ar, (CF3)2CO) by an absolute and a relative method. I/o is a linear function of the pressure in spite of the fact that overlapping of the hyperfine structure components varies considerably in the range investigated. For optimum energy storage, C02 is a good compromise between pressure broadening and chemical deactivation of the excited I-atoms. At one atmosphere of C02, 5 to 7 J/cm -2 can be stored, the hyperfine structure is largely blurred, and the amplification of pulses shorter than 100 psec should be possible. 
  Reference    (Z. Naturforsch. 31a, 569—577 [1976]; received April 15 1976) 
  Published    1976 
  Similar Items    Find
 DEBUG INFO      
 TEI-XML for    default:Reihe_A/31/ZNA-1976-31a-0569.pdf 
 Identifier    ZNA-1976-31a-0569 
 Volume    31 
97Author    N. D 'angelo, P. Michelsen, H. L. PécseliRequires cookie*
 Title    Ion Acoustic Waves in a Density Gradient  
 Abstract    A damping-growth transition for ion acoustic waves propagating in a non-uniform plasma (e-folding lengths for the density ln) is observed at wavelengths Ac ~ 2 n ln . The experiment, con-ducted in a ^-device, supports calculations performed in connection with the problem of solar corona heating. 
  Reference    (Z. Naturforsch. 31a, 578—582 [1976]; received March 9 1976) 
  Published    1976 
  Similar Items    Find
 DEBUG INFO      
 TEI-XML for    default:Reihe_A/31/ZNA-1976-31a-0578.pdf 
 Identifier    ZNA-1976-31a-0578 
 Volume    31 
98Author    Christian EhrsamRequires cookie*
 Title    Neuformulierung der von Gibbs begründeten Thermostatik  
 Abstract    Reformulation of the Gibbsian Thermostatics A generalized state space is introduced with the aim of reformulating the Gibbsian thermo-statics. The fundamental criterion of equilibrium is cast in a form specially adapted to simple (multicomponent) systems. A discussion about stable equilibrium states of open systems leads to the familiar stability conditions. The thermodynamic potentials appear within a framework more general than that found in customary presentations; the concept of "generalized availability" is defined. 
  Reference    (Z. Naturforsch. 31a, 583—588 [1976]; eingegangen am 6. März 1976) 
  Published    1976 
  Similar Items    Find
 DEBUG INFO      
 TEI-XML for    default:Reihe_A/31/ZNA-1976-31a-0583.pdf 
 Identifier    ZNA-1976-31a-0583 
 Volume    31 
99Author    Christian EhrsamRequires cookie*
 Title    Thermostatik der Elektrolytlösungen  
 Abstract    Thermostatics of Electrolyte Solutions To overcome certain difficulties arising in connection with the application of thermodynamics to systems with electrolytes, a model for electrolyte solutions is proposed which can be analysed in terms of thermostatics. On the basis of this model, a thermostatics of electrolyte solutions is developed. The electrochemical potential fi appears as the composite quantity ju+zJ-10, where p (the chemical potential) and 20 are Lagrange multipliers. The usual definition of fi is found to be questionable. 
  Reference    (Z. Naturforsch. 31a, 589—593 [1976]; eingegangen am 6. März 1976) 
  Published    1976 
  Similar Items    Find
 DEBUG INFO      
 TEI-XML for    default:Reihe_A/31/ZNA-1976-31a-0589.pdf 
 Identifier    ZNA-1976-31a-0589 
 Volume    31 
100Author    KonfidenzintervallenR. Hamm, H. J. Kohrmann, H. Günther, W. ZeilRequires cookie*
 Title    Mikrowellenspektrum von 12 C 34 SF 37 C1 r0-Struktur sowie rz-und re-Struktur von CSFC1 unter Berücksichtigung  
 Abstract    Microwave Spectrum restructure, rz-and restructure of the Isotopic Species 12 C 3i SF 3 "Cl The microwave spectrum of the isotopic species 12 C 34 SF 37 C1 has been measured in natural abun-dance. The three rotational constants and five quartic centrifugal distortion constants have been determined by a least square fit. In comparison with our former calculations, the five structural r0-parameters of the planar molecule have now been determined from eight rotational constants instead of six, thus yielding remarkably smaller confidence intervalls. Furthermore an restructure has been calculated and an equilibrium-structure has been estimated. 
  Reference    (Z. Naturforsch. 31a, 594—601 [1976]; eingegangen am 10. März 1976) 
  Published    1976 
  Similar Items    Find
 DEBUG INFO      
 TEI-XML for    default:Reihe_A/31/ZNA-1976-31a-0594.pdf 
 Identifier    ZNA-1976-31a-0594 
 Volume    31 
Prev
1
2
3
4
5
...
Next