Library

X
feed icon rss

Your email was sent successfully. Check your inbox.

An error occurred while sending the email. Please try again.

Proceed reservation?

Export
  • 1
    Electronic Resource
    Electronic Resource
    The photofragmentation of Ar+3 (1989)
    College Park, Md. : American Institute of Physics (AIP)
    The Journal of Chemical Physics 91 (1989), S. 7612-7620 
    Details
    ISSN: 1089-7690
    Source: AIP Digital Archive
    Topics: Physics , Chemistry and Pharmacology
    Notes: The photofragment kinetic energy spectrum of Ar+3 has been recorded in a crossed-beam apparatus at 532 nm; the only photofragment product observed is Ar+. For the purposes of analysis, a spectrum for the photofragmentation of Ar+2 was recorded under similar experimental conditions. In each case, the ions were prepared by the electron impact ionization of a neutral argon cluster beam. The Ar+3 spectrum consists of two quite distinct features, a high-energy component which closely resembles the result observed for Ar+2, and a second, low-energy feature, which is peculiar to Ar+3 alone. The two high-energy wings appear to arise from a very rapid dissociation process where approximately 70% of the excess energy appears as Ar+ kinetic energy. A computer simulation of this region of the spectrum gives an anisotropy parameter, β, of 1.1±0.2. The low-energy, component to the spectrum arises from a two-step dissociation process, in which a weakly bound atom carries away a relatively large fraction of the available excess energy to leave a quasibound dimer ion. The energetics associated with this latter process can be accounted for using a partitioning scheme proposed by Baer et al. [J. Chem. Phys. 76, 5917 (1982)]. A computer simulation of the low-energy component gives β(approximately-equal-to)0.0. A detailed discussion of the results in terms of electronic structure, photofragmentation dynamics, and allowed electronic transitions, concludes that Ar+3 takes the form of a stable dimer ion and a weakly bound atom, and that it is most probably nonlinear.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1063/1.457283
    Library Location Call Number Volume/Issue/Year Availability
    BibTip Others were also interested in ...
    Paper (German National Licenses)
    Fulltext
  • 2
    Electronic Resource
    Electronic Resource
    Structure and stability of the nitric oxide dimer (1971)
    s.l. : American Chemical Society
    Journal of the American Chemical Society 93 (1971), S. 7149-7152 
    Details
    ISSN: 1520-5126
    Source: ACS Legacy Archives
    Topics: Chemistry and Pharmacology
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1021/ja00755a006
    Library Location Call Number Volume/Issue/Year Availability
    BibTip Others were also interested in ...
    Paper (German National Licenses)
    Fulltext
  • 3
    Electronic Resource
    Electronic Resource
    Size distribution of complexes formed between poly(dimethyldiallylammonium chloride) and bovine serum albumin (1988)
    s.l. : American Chemical Society
    Macromolecules 21 (1988), S. 2291-2293 
    Details
    ISSN: 1520-5835
    Source: ACS Legacy Archives
    Topics: Chemistry and Pharmacology , Physics
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1021/ma00185a071
    Library Location Call Number Volume/Issue/Year Availability
    BibTip Others were also interested in ...
    Paper (German National Licenses)
    Fulltext
  • 4
    Electronic Resource
    Electronic Resource
    nifH genes in the obligate methane oxidizing bacteria (1988)
    Oxford, UK : Blackwell Publishing Ltd
    FEMS microbiology letters 49 (1988), S. 0 
    Details
    ISSN: 1574-6968
    Source: Blackwell Publishing Journal Backfiles 1879-2005
    Topics: Biology
    Notes: Abstract The hifH gene from Klebsiella pneumoniae, which codes for the Fe protein component of nitrogenase, was used as a probe to detect nifH homologues in total cellular DNA from 13 obligate methane oxidizing bacteria. All but one of those strains that had previously been shown capable of fixing dinitrogen contained sequences homologous to nifH. DNAs from three of the six non-diazotrophic strains were also found to possess such homology.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1111/j.1574-6968.1988.tb02681.x
    Library Location Call Number Volume/Issue/Year Availability
    BibTip Others were also interested in ...
    Paper (German National Licenses)
    Fulltext
  • 5
    Electronic Resource
    Electronic Resource
    Molecular analysis of methane monooxygenase from Methylococcus capsulatus (Bath) (1989)
    Springer
    Archives of microbiology 152 (1989), S. 154-159 
    Details
    ISSN: 1432-072X
    Keywords: Methanotroph ; Methane oxidation ; Methane monooxygenase ; Oligonucleotide probing ; Subunit genes ; Methylococcus capsulatus (Bath)
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology
    Notes: Abstract Methane monooxygenase (MMO) is the enzyme responsible for the conversion of methane to methanol in methanotrophic bacteria. In addition, this enzyme complex oxidizes a wide range of aliphatic and aromatic compounds in a number of potentially useful biotransformations. In this study, we have used biochemical data obtained from purification and characterization of the soluble MMO from Methylococcus capsulatus (Bath), to identify structural genes encoding this enzyme by oligonucleotide probing. The genes encoding the β and γ subunits of MMO were found to be chromosomally located and were linked in this organism. We report here on the analysis of a recombinant plasmid containing 12 kilobases of Methylococcus DNA and provide the first evidence for the localization and linkage of genes encoding the methane monooxygenase enzyme complex. DNA sequence analysis suggests that the primary structures of the β and γ subunit of MMO are completely novel and the complete sequence of these genes is presented.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00456094
    Library Location Call Number Volume/Issue/Year Availability
    BibTip Others were also interested in ...
    Paper (German National Licenses)
    Fulltext
  • 6
    Electronic Resource
    Electronic Resource
    Finite analytical expressions for two-centre exchange integrals between having the same exponents (1971)
    Springer
    Theoretical chemistry accounts 21 (1971), S. 301-308 
    Details
    ISSN: 1432-2234
    Source: Springer Online Journal Archives 1860-2000
    Topics: Chemistry and Pharmacology
    Description / Table of Contents: Zusammenfasung Für eine Reihe von Zweizentren-Austauschintegralen zwischen Slaterorbitalen werden geschlossene analytische Ausdrücke mitgeteilt, wobei allerdings nur ls-, 2s- und 2pσ-Orbitale mit gleichen Exponenten behandelt werden. Schließlich wird noch eine asymptotische Entwicklung für großeR angegeben.
    Abstract: Resumé Obtention d'expressions analytiques compactes pour certaines intégrales d'échange bicentriques entre orbitales de Slater. On considère des intégrales impliquant des orbitales ls, 2s et 2pσ avec comme restriction l'égalité des exposants orbitaux. Un développement valable pour les grandes valeurs deR est aussi obtenu.
    Notes: Abstract Closed analytical expressions are derived for some two-centre exchange integrals between Slater orbitals. Integrals involving 1s, 2s and 2pσ orbitals are considered with the restriction that the two orbitals have the same exponent. An expansion formula accurate for large values ofR is also derived.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF01172020
    Library Location Call Number Volume/Issue/Year Availability
    BibTip Others were also interested in ...
    Paper (German National Licenses)
    Fulltext
  • 7
    Electronic Resource
    Electronic Resource
    The rational fraction representation of diatomic potentials (1987)
    Springer
    Theoretical chemistry accounts 71 (1987), S. 459-465 
    Details
    ISSN: 1432-2234
    Keywords: Potential energy curves ; Rational fractions
    Source: Springer Online Journal Archives 1860-2000
    Topics: Chemistry and Pharmacology
    Notes: Abstract The representation of diatomic potential energy curves by rational fractions using low order polynomials in numerator and denominator is investigated. The rational fraction method, which is illustrated by examples, is shown to fail in providing a robust representation of diatomic potentials for wide application.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00530243
    Library Location Call Number Volume/Issue/Year Availability
    BibTip Others were also interested in ...
    Paper (German National Licenses)
    Fulltext
  • 8
    Electronic Resource
    Electronic Resource
    The general analytic expression for S4-symmetry-invariant potential functions of tetra-atomic homonuclear molecules (1985)
    New York, NY : Wiley-Blackwell
    International Journal of Quantum Chemistry 28 (1985), S. 287-295 
    Details
    ISSN: 0020-7608
    Keywords: Computational Chemistry and Molecular Modeling ; Atomic, Molecular and Optical Physics
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Notes: The potential energy of a homonuclear X4 molecule is an invariant of the atom permutation group S4 acting on the internal coordinates of X4. It is shown by means of invariant theory that six algebraically independent invariants and five additional invariants are required to express the general invariant function for this group. Explicit expressions for these 11 invariants are given.
    Additional Material: 1 Ill.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/qua.560280210
    Library Location Call Number Volume/Issue/Year Availability
    BibTip Others were also interested in ...
    Paper (German National Licenses)
    Fulltext
  • 9
    Electronic Resource
    Electronic Resource
    Chemical ‘fingerprint’ studies of fire atmosphere (1986)
    New York, NY [u.a.] : Wiley-Blackwell
    Fire and Materials 10 (1986), S. 21-28 
    Details
    ISSN: 0308-0501
    Keywords: Chemistry ; Polymer and Materials Science
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Architecture, Civil Engineering, Surveying , Mechanical Engineering, Materials Science, Production Engineering, Mining and Metallurgy, Traffic Engineering, Precision Mechanics
    Notes: Large-scale fire experiments have been carried out in a special test rig to study the chemical nature of fire atmosphere using a ‘fingerprint’ sampling and analysis method. Four polymeric materials - wood, polypropylene, polymethyl methacrylate and polystyrene foam - were used separately as fuel, with both high and low ventilation. In addition to oxides of carbon the fingerprints yielded typically between twenty and forty different chemical compounds including several (e.g. aldehydes) which could contribute significantly to the irritancy of the fire gases. The change in nature of the fingerprint gases with the different ventilation conditions, different polymeric materials and with different stages of the same fire is discussed, together with the toxicological significance of the results.
    Additional Material: 7 Ill.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/fam.810100105
    Library Location Call Number Volume/Issue/Year Availability
    BibTip Others were also interested in ...
    Paper (German National Licenses)
    Fulltext
Close ⊗
This website uses cookies and the analysis tool Matomo. More information can be found here...