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Mitochondrien aus Rattenleber (RL) und Rinderherzmuskel (BH) erzeugen bei Behandlung mit O2 eine schwache Chemilumineszenz in dem Spektralbereich zwischen 400 und 650 mµ, deren Intensität bei RL-Mitochondrien durch vorheriges Einfrieren und Auftauen wie durch Ultraschallbehandlung größer wird. Bei beiden Arten verursacht Zusatz von Acridinorange eine wesentliche Verstärkung der Lumineszenz, gleichzeitig wird die O2-Aufnahme gehemmt. RL-Mitochondrien erzeugen unter diesen Bedingungen eine kurzzeitige, BH-Mitochondrien eine langsam ansteigende langandauernde Strahlung; das gleiche Verhalten zeigen aus BH-Mitochondrien gewonnene „electrontransfer-particles“ (ETP). Der zeitliche Ablauf und die Beeinflußbarkeit durch Effektoren der Atmungskette ist andersartig als bei der von VLADIMIROV gefundenen Chemilumineszenz von RL-Mitochondrien. Als Träger der Lumineszenz wird angeregter O2 diskutiert.
Continuum structure of Ca40
(1967)
The total S1- matrix of Ca40 has been calculated for excitation energies between 11 and 28 MeV. As typical results, the (γ, p0) and the total absorption cross sections are shown and compared with experiments. It is shown that the proper treatment of the one-particle, one-hole shell-model continuum accounts for most of the observed structures.
Using the eigenchannel reaction theory we performed coupled-channel calculations for Si28 and computed the differential cross section for Al27(p, γ0)Si28 over the energy range 6 MeV<Ep <16 MeV. The obtained angular distributions are nearly constant over the whole energy range and agree with the experiment in that they are almost isotropic. Thus, it seems that in this framework we can give a natural explanation for the peculiar behavior of the Al27(p, γ0)Si28 cross section.
The total particle-particle SJ matrix of O16 for spin J=1- and excitation energies between 15 and 27 MeV has been calculated in the eigenchannel reaction theory for several parameters of the Saxon-Woods potential and the two-body force. The many-body problem has been treated in the 1-particle-1-hole approximation. The photon channels have been included by perturbation theory. Surprisingly, the most important structure of the experimental cross sections is reproduced quite well in this simple approximation.
The theory of collective correlations in nuclei is formulated for giant resonances interacting with surface vibrations. The giant dipole states are treated in the particle-hole framework, while the surface vibrations are described by the collective model. Consequently, this treatment of nuclear structure goes beyond both the common particle-hole model (including its various improvements which take ground-state correlations into account) and the pure collective model. The interaction between giant resonances and surface degrees of freedom as known from the dynamic collective theory is formulated in the particle-hole language. Therefore, the theory contains the particle-hole structures and the most important "collective intermediate" structures of giant resonances. Detailed calculations are performed for 12C, 28Si, and 60Ni. A good detailed agreement between theory and experiment is obtained for all these nuclei, although only 60Ni is in the region where one would expect the theory to work well (50< A <110).
The structure of natural languages as studied by linguists is connected in several ways with phenomena outside this domain. Problems of this kind are, to mention only three: (a) the acoustical and physiological interpretation of the primitive elements in which the sound structure is represented; (b) the conceptual or referential interpretation of the primitive elements that build up the meanings of the utterances; (c) the structural relationships that go beyond the single sentences, usually taken as the largest units to be analyzed linguistically, i.e., the question as to the conditions that two or more sentences must meet in order to form a connected text. ...