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  • 1
    Electronic Resource
    Electronic Resource
    Loss of methionine in casein during storage with autoxidizing methyl linoleate (1969)
    s.l. : American Chemical Society
    Journal of agricultural and food chemistry 17 (1969), S. 1353-1354 
    Details
    ISSN: 1520-5118
    Source: ACS Legacy Archives
    Topics: Agriculture, Forestry, Horticulture, Fishery, Domestic Science, Nutrition , Process Engineering, Biotechnology, Nutrition Technology
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1021/jf60166a019
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  • 2
    Electronic Resource
    Electronic Resource
    Quantitative measurement of intermediate species in sustained Belousov-Zhabotinskii oscillations (1980)
    s.l. : American Chemical Society
    Journal of the American Chemical Society 102 (1980), S. 1241-1245 
    Details
    ISSN: 1520-5126
    Source: ACS Legacy Archives
    Topics: Chemistry and Pharmacology
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1021/ja00524a003
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    Paper (German National Licenses)
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  • 3
    Electronic Resource
    Electronic Resource
    Chemical chaos: from hints to confirmation (1987)
    s.l. : American Chemical Society
    Accounts of chemical research 20 (1987), S. 436-442 
    Details
    ISSN: 1520-4898
    Source: ACS Legacy Archives
    Topics: Chemistry and Pharmacology
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1021/ar00144a002
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  • 4
    Electronic Resource
    Electronic Resource
    Demographic reductions and genetic bottlenecks in humans: minisatellite allele distributions in oceania (1993)
    Springer
    Human genetics 〈Berlin〉 91 (1993), S. 445-450 
    Details
    ISSN: 1432-1203
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology , Medicine
    Notes: Abstract Polynesians have lower heterozygosities at minisatellite VNTR (Variable Number of Tandem Repeat) loci than have Melanesians; this has been taken as evidence of population-size bottlenecks during the colonisation of Polynesia. We have analysed the allelic distribution of several minisatellite loci in the population of Rapa, a Polynesian island that is known to have undergone a demographic reduction of approximately 95% since first contact with European explorers 200 years ago, leaving a surviving population of 120. We found that the minisatellite diversity of this population does not differ significantly from that of other Polynesian populations, and appears consistent with the neutral expectation of diversity assuming the infinite alleles model. This suggests that the demographic crisis that Rapa underwent did not perturb the allele distribution to the extent that the tests used here could detect. Thus we cannot say that a demographic change of this magnitude constitutes a genetic bottleneck detectable at these loci. The reduced diversity seen in Polynesia must therefore be explained either by more severe bottlenecks as might be expected during colonisation, or else by other causes.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00217769
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  • 5
    Electronic Resource
    Electronic Resource
    Penile fracture: MRI demonstration of a urethral tear associated with a rupture of the corpus cavernosum (1998)
    Springer
    European radiology 8 (1998), S. 469-470 
    Details
    ISSN: 1432-1084
    Keywords: Key words: Penis ; Fracture ; Injuries ; Urethra ; Corpus cavernosum
    Source: Springer Online Journal Archives 1860-2000
    Topics: Medicine
    Notes: Abstract. We report a case of traumatic urethral tear associated with a rupture of the corpus cavernosum, demonstrated on MRI. We discuss the potential role of a non-invasive preoperative assessment by MRI.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/s003300050416
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  • 6
    Electronic Resource
    Electronic Resource
    Photodissociation of size-selected K+n clusters (1988)
    College Park, Md. : American Institute of Physics (AIP)
    The Journal of Chemical Physics 88 (1988), S. 3022-3027 
    Details
    ISSN: 1089-7690
    Source: AIP Digital Archive
    Topics: Physics , Chemistry and Pharmacology
    Notes: Photofragmentation studies are described for size-selected ionized potassium-atom clusters, generated in a supersonic expansion and analyzed with a tandem time-of-flight system. In the range n=3 to 41 the relative ion intensities in photofragmentation spectra reflect the relative stabilities of the ion products. Moreover the photon-energy dependence of the fragmentation patterns suggests that photodissociation proceeds rather via a fast sequential evaporation of neutral monomers than via a fission process. A value can be deduced for the mean binding energy per atom which is increasing with the cluster size.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1063/1.453944
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  • 7
    Electronic Resource
    Electronic Resource
    Adiabatic decomposition of mass-selected alkali clusters (1987)
    College Park, Md. : American Institute of Physics (AIP)
    The Journal of Chemical Physics 87 (1987), S. 5694-5699 
    Details
    ISSN: 1089-7690
    Source: AIP Digital Archive
    Topics: Physics , Chemistry and Pharmacology
    Notes: The decomposition of metastable photoionized mass-selected alkali clusters is investigated using a tandem time-of-flight spectrometer. Na+n and K+n are found to decompose mainly by the evaporation of either a single neutral atom or a neutral dimer in a time scale of about 10 μs. The predominant fragmentation channels are found to follow the adiabatic dissociation channels associated with the lowest energies accordingly to our CI calculations. In the light of our experimental and theoretical results a comparison between the different calculations of the absolute atomization energies available in the literature is presented.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1063/1.453544
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  • 8
    Electronic Resource
    Electronic Resource
    From quasiperiodicity to chaos in the Belousov–Zhabotinskii reaction. I. Experiment (1987)
    College Park, Md. : American Institute of Physics (AIP)
    The Journal of Chemical Physics 86 (1987), S. 3325-3338 
    Details
    ISSN: 1089-7690
    Source: AIP Digital Archive
    Topics: Physics , Chemistry and Pharmacology
    Notes: We report on the experimental observation of both a primary and a secondary Hopf bifurcation leading to quasiperiodicity in the Belousov–Zhabotinskii reaction. When taking the BZ system away from these local conditions, we witness the occurrence of chaos which comes with the breaking of the underlying torus into a fractal object. We emphasize that most of the alternating periodic–chaotic sequences studied in the literature are reminiscent of such two-frequency dynamics. We argue about the controversal existence of deterministic chaos in such sequences. We anticipate the results of a numerical and theoretical investigation of these sequences which discards definitely any stochastic objection to chemical chaos.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1063/1.452751
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  • 9
    Electronic Resource
    Electronic Resource
    Photoionization of potassium clusters: Neutral and ionic cluster stabilities (1987)
    College Park, Md. : American Institute of Physics (AIP)
    The Journal of Chemical Physics 87 (1987), S. 229-238 
    Details
    ISSN: 1089-7690
    Source: AIP Digital Archive
    Topics: Physics , Chemistry and Pharmacology
    Notes: Neutral potassium clusters of two different mass distributions generated either by a sonic or a conical nozzle were photoionized at several ionizing energies. By combining different nucleation conditions with several photoionization situations, variations of ion mass spectral patterns reflecting either neutral or ionic stabilities were obtained. The spectra show peaks or steps for those neutral and ionized clusters which contain 8, 20, and 40 electrons. These can be understood in terms of electronic shell structure for both neutral and ionized potassium clusters. However local irregularities appearing for the small cluster sizes reveal the influence of their geometrical structure. Moreover ionizing laser power dependencies taken at various photon energies were used to study fragmentation effects following ionization.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1063/1.453621
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  • 10
    Electronic Resource
    Electronic Resource
    From quasiperiodicity to chaos in the Belousov–Zhabotinskii reaction. II. Modeling and theory (1987)
    College Park, Md. : American Institute of Physics (AIP)
    The Journal of Chemical Physics 86 (1987), S. 3339-3356 
    Details
    ISSN: 1089-7690
    Source: AIP Digital Archive
    Topics: Physics , Chemistry and Pharmacology
    Notes: We discuss the quasiperiodic behavior experimentally observed in the Belousov–Zhabotinskii reaction as the result of the interaction of two elementary instabilities, namely the Hopf bifurcation at the origin of the oscillating nature of this reaction and the hysteresis bifurcation which accounts for the phenomenom of bistability. We use a normal form approach to understand the evolution of the dynamics when the BZ system is moved away from the local situation where both these instabilities are competing. We first discuss the transition to chaos which comes with the breaking up of the underlying torus into a fractal object. Then we emphasize that nonlocally such a two-frequency dynamics manifests through alternating periodic–chaotic sequences which look very much like the sequences observed in bench experiments. We propose a seven-variable Oregonator type model which not only accounts for these sequences but also for those which involve only one fundamental frequency as observed in the 1980 Texas experiment. We refer to the dynamical system theory to definitively establish the existence of deterministic chaos in both of these sequences. We conclude with the very promising perspective of using a normal form approach to reduce the evolution equations to their simplest form by selecting the relevant instabilities which control the dynamics of the BZ reaction in the regions of parameter space explored so far.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1063/1.451992
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