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  • 1
    Electronic Resource
    Electronic Resource
    The relation between the molecular weight and intrinsic viscosity of polyvinyl alcohol (1980)
    Springer
    Colloid & polymer science 258 (1980), S. 152-155 
    Details
    ISSN: 1435-1536
    Source: Springer Online Journal Archives 1860-2000
    Topics: Chemistry and Pharmacology , Mechanical Engineering, Materials Science, Production Engineering, Mining and Metallurgy, Traffic Engineering, Precision Mechanics
    Notes: Summary A series of unfractionated and fractionated samples of polyvinyl acetate were prepared by homogeneous solution polymerization of vinyl acetate in N,N-dimethylformamide at 90 °C. in presence of γ, γ-azo-(γ-cyano-n-valeric acid) as initiator under a variety of conditions. A portion of each sample was hydrolysed to polyvinyl alcohol. The number average molecular weights have been determined by end-group titrations. The following molecular weight-intrinsic viscosity relationships for polyvinyl alcohol have been obtained. [η] = 33.88 X 10−5 M 0.716 — for unfractionated samples in water at 30 °C. [η] = 29.51 X 10−5 M 0.716 — for fractionated samples in water at 30 °C.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF01498273
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  • 2
    Electronic Resource
    Electronic Resource
    Ideal technique and sites for intramuscular injection in infants and children (1989)
    Springer
    Pediatric surgery international 4 (1989), S. 140-142 
    Details
    ISSN: 1437-9813
    Keywords: Intramuscular injection ; Infants and children
    Source: Springer Online Journal Archives 1860-2000
    Topics: Medicine
    Notes: Abstract Complications following intramuscular (IM) injections in infants and children are quite frequent. Various studies have revealed that in most of the cases drugs were either injected into the subcutaneous tissue plane or into the muscle, where a disparity between the volume of injected material and the volume of muscle mass where it was injected was obvious. The consequences were either fat-necrotic abscess or muscle fibrosis leading to deformity of the nearby joint. On the basis of our studies and other observations, the ideal technique of IM injection and the best sites for injection in infants and children are suggested in order to prevent complications.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00181856
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  • 3
    Electronic Resource
    Electronic Resource
    Time-dependent Hartree-Fock calculations for the excited ‘S’ states of lithium isoelectronic sequence (1984)
    Springer
    Theoretical chemistry accounts 66 (1984), S. 173-181 
    Details
    ISSN: 1432-2234
    Keywords: RPA calculations ; excited states ; atomic wavefunctions
    Source: Springer Online Journal Archives 1860-2000
    Topics: Chemistry and Pharmacology
    Notes: Abstract Time-dependent HF (RPA) calculations have been performed to estimate the transition energies and excited state wavefunctions of Li, Be+, B2+ and C3+ for the transitions 1s 22s∶ 2 S → 1s 2 ns ∶ 2 S (n = 3,4, ... 8). The excitation energies and excited state wavefunctions are extracted from the position of the poles of a linearised variational functional. The excitation energies are in excellent agreement with those obtained spectroscopically. The excited state wavefunctions are utilised to find the matrix elements of different operators and the cusp values.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00549667
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  • 4
    Electronic Resource
    Electronic Resource
    Static dipole polarizabilities of open-shell negative ions (1992)
    Springer
    Theoretical chemistry accounts 82 (1992), S. 223-227 
    Details
    ISSN: 1432-2234
    Keywords: Static polarizabilities ; Negative ions ; Open shell systems
    Source: Springer Online Journal Archives 1860-2000
    Topics: Chemistry and Pharmacology
    Notes: Summary Dipole polarizability estimates at λ ⇒ ∞ have been calculated for the 2p and 3p open-shell negative ions in their ground and valence excited states. To complete the sequence such estimates for F− and Cl− in their ground1 S state have also been made. Single configuration based linear response theory has been adopted presently with a view to study the effect of RPA-type correlations on the polarizabilities of such systems. For the 3p open-shell systems the innermost 1s core has been kept frozen. Most of the results are reported for the first time. Agreement with existing data, wherever available, is reasonable. The convergence of the polarizability estimates towards basis sets has been studied.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF01113254
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  • 5
    Electronic Resource
    Electronic Resource
    Doubly excited3Se,3De and3Ge states of two-electron atomic systems (1994)
    Springer
    Theoretical chemistry accounts 89 (1994), S. 147-155 
    Details
    ISSN: 1432-2234
    Keywords: Doubly excited states ; Excitation energies ; Effective quantum numbers
    Source: Springer Online Journal Archives 1860-2000
    Topics: Chemistry and Pharmacology
    Notes: Summary Time-dependent perturbation theory has been applied to calculate the doubly excited triplet statesNsns:3Se,Npnp:3De andNdnd:3Ge (N=2, 3, 4,n=N+1, ... ,5) for He, Li+, Be2+ and B3+. A time-dependent harmonic perturbation causes simulataneous excitation of both the electrons with a change of spin state. The doubly excited energy levels have been identified as the poles of an appropriately constructed linearized variational functional with respect to the driving frequency. In addition to the transition energies, effective quantum numbers of these doubly excited states have been calculated and analytic representations of their wave functions are obtained. These are utilized to estimate the Coulomb repulsion term for these states which checks the consistency of the wave functions. These wave functions may also be used for calculating other physical properties of the systems.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF01132798
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  • 6
    Electronic Resource
    Electronic Resource
    Dynamic polarizabilities and Rydberg states of open shell atomic systems (1988)
    Springer
    Theoretical chemistry accounts 74 (1988), S. 431-444 
    Details
    ISSN: 1432-2234
    Keywords: Dynamic polarizabilities ; Rydberg states ; Open shell ions
    Source: Springer Online Journal Archives 1860-2000
    Topics: Chemistry and Pharmacology
    Notes: Abstract Time dependent coupled Hartree-Fock (TDCHF) theory is applied to calculate frequency dependent polarizabilities, transition energies, oscillator strengths and effective quantum numbers of several excited states of the open shell ions Al, Si+, P2+, S3+, Cl4+, Ar5+, Cl and Ar+ in the 2P state within and beyond the normal dispersion region. The Roothaan formalism has been adopted to deal with the open shell problem. The excitation energies are extracted from the positions of the poles of an appropriate functional. Analytic representations of the singly excited Rydberg states have been found. The results obtained compare well with spectroscopic and other elaborate theoretical data wherever available. Inner shell excitations have been found for the first time within TDCHF theory.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00528015
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  • 7
    Electronic Resource
    Electronic Resource
    Singly excited bound states in continuum: a time-dependent perturbation approach (1993)
    Springer
    Theoretical chemistry accounts 85 (1993), S. 371-377 
    Details
    ISSN: 1432-2234
    Keywords: Dynamic polarizabilities ; Transition energies ; Oscillator strengths ; Closed shell negative ions
    Source: Springer Online Journal Archives 1860-2000
    Topics: Chemistry and Pharmacology
    Notes: Summary Time-dependent coupled Hartree-Fock (TDCHF) scheme has been applied to study the behaviour of bound excited states embedded in the continuum for the negative ions Li−, F−, Na− and Cl−. The excited states have been obtained from the position of the poles of the dynamic polarizability values which are evaluated for all the ions within and beyond the normal dispersion region. Transition energies and dipole allowed oscillator strengths have been obtained for several transitions which lie in the continuum. Although the excited state functions are extremely diffuse, they show proper asymptotic behaviour and furnish correct number of nodes. Oscillator strengths are found to follow a different trend than observed in normal bound state calculations.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF01113430
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  • 8
    Electronic Resource
    Electronic Resource
    Calculation of rydberg states of lithium isoelectronic sequence (1986)
    Springer
    Theoretical chemistry accounts 69 (1986), S. 51-62 
    Details
    ISSN: 1432-2234
    Keywords: Rydberg states ; Atomic wavefunctions ; Lithium atom
    Source: Springer Online Journal Archives 1860-2000
    Topics: Chemistry and Pharmacology
    Notes: Abstract The transition energies and singly excited P, D and F states of Li, Be+ and B2+ for the Rydberg levels 1s 22s: 2 S→1s 2 nl: 2L (n=5, 6,...9) have been calculated using time dependent coupled Hartree-Fock (TDCHF) theory. Within single particle model the theory includes RPA type correlations and furnishes reasonable description of the excited states. The transition energies and oscillator strengths for allowed transitions are in good agreement with the experimental and theoretical values, wherever available. Effective quantum numbers have been estimated for all transitions.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00526292
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  • 9
    Electronic Resource
    Electronic Resource
    The relation between the molecular weight and intrinsic viscosity of polyacrylonitrile (1978)
    Springer
    Colloid & polymer science 256 (1978), S. 1027-1029 
    Details
    ISSN: 1435-1536
    Source: Springer Online Journal Archives 1860-2000
    Topics: Chemistry and Pharmacology , Mechanical Engineering, Materials Science, Production Engineering, Mining and Metallurgy, Traffic Engineering, Precision Mechanics
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF01520991
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  • 10
    Electronic Resource
    Electronic Resource
    The relation between the molecular weight and intrinsic viscosity of polymethyl acrylate (1980)
    Springer
    Colloid & polymer science 258 (1980), S. 464-466 
    Details
    ISSN: 1435-1536
    Source: Springer Online Journal Archives 1860-2000
    Topics: Chemistry and Pharmacology , Mechanical Engineering, Materials Science, Production Engineering, Mining and Metallurgy, Traffic Engineering, Precision Mechanics
    Notes: Summary A series of unfractionated and fractionated samples of polymethyl acrylate of different low molecular weights have been prepared by homogeneous solution. polymerization in dimethyl formamide in presence of γ, γ'-azo-(γ-cyano-n-valeric acid) as initiator under a variety of conditions. The number-average molecular weights have been determined by end-group titrations and vapour pressure osmometry. The following [η]-M relationships for polymethyl acrylate have been obtained. [η] = 33.5 x 10−5M0.63 for unfractionated samples in benzene at 25 °C. [η] = 3.89 x 10−5M0.843 for fractionated samples in benzene at 35 °C.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF01480842
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