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  • Artikel: DFG Deutsche Nationallizenzen  (14)
  • Digitale Medien  (14)
  • 1980-1984  (14)
  • 1
    Digitale Medien
    Digitale Medien
    Location and anisotropic refinement of deuterium atoms in deuterium sodium silicate–deuterium oxide (1/8) Na2D2SiO4.8D2O by neutron diffraction; hydrogen bonding at 173 K (1984)
    Oxford [u.a.] : International Union of Crystallography (IUCr)
    Acta crystallographica 40 (1984), S. 733-736 
    Details
    ISSN: 1600-5759
    Quelle: Crystallography Journals Online : IUCR Backfile Archive 1948-2001
    Thema: Chemie und Pharmazie , Geologie und Paläontologie , Physik
    Materialart: Digitale Medien
    URL: http://dx.doi.org/10.1107/S0108270184005527
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  • 2
    Digitale Medien
    Digitale Medien
    The structure of trisodium hydrogensilicate dihydrate: high-temperature form (1981)
    Copenhagen : International Union of Crystallography (IUCr)
    Acta crystallographica 37 (1981), S. 789-792 
    Details
    ISSN: 1600-5740
    Quelle: Crystallography Journals Online : IUCR Backfile Archive 1948-2001
    Thema: Chemie und Pharmazie , Geologie und Paläontologie , Physik
    Materialart: Digitale Medien
    URL: http://dx.doi.org/10.1107/S0567740881004342
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  • 3
    Digitale Medien
    Digitale Medien
    UNILATERAL HABITUATION OF VESTIBULO-OCULAR RESPONSES IN THE CAT (1981)
    Oxford, UK : Blackwell Publishing Ltd
    Annals of the New York Academy of Sciences 374 (1981), S. 0 
    Details
    ISSN: 1749-6632
    Quelle: Blackwell Publishing Journal Backfiles 1879-2005
    Thema: Allgemeine Naturwissenschaft
    Materialart: Digitale Medien
    URL: http://dx.doi.org/10.1111/j.1749-6632.1981.tb30881.x
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  • 4
    Digitale Medien
    Digitale Medien
    MODIFICATIONS OF VESTIBULAR NYSTAGMUS PRODUCED BY FIXATION OF VISUAL AND NONVISUAL TARGETS (1981)
    Oxford, UK : Blackwell Publishing Ltd
    Annals of the New York Academy of Sciences 374 (1981), S. 0 
    Details
    ISSN: 1749-6632
    Quelle: Blackwell Publishing Journal Backfiles 1879-2005
    Thema: Allgemeine Naturwissenschaft
    Materialart: Digitale Medien
    URL: http://dx.doi.org/10.1111/j.1749-6632.1981.tb30911.x
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  • 5
    Digitale Medien
    Digitale Medien
    Re-interpretation of the solvent dielectric constant in coordination chemical terms (1983)
    Springer
    Journal of solution chemistry 12 (1983), S. 135-152 
    Details
    ISSN: 1572-8927
    Schlagwort(e): Dielectric constant ; empirical solvent parameters ; associated solvents ; solvent-reactivity correlations
    Quelle: Springer Online Journal Archives 1860-2000
    Thema: Chemie und Pharmazie
    Notizen: Abstract It is found for common aprotic solvents that the logarithm of the dielectric constants can be represented by a linear combination of the acceptor numbers (AN) and the donor numbers (DN) (or equivalent parameters), $$log \in = c_1 ({\rm A}{\rm N}){\text{ }} + {\text{ }}c_2 (DN){\text{ }} + {\text{ }}c_3 $$ With this equation, concepts of specific and non-specific solvation are brought under the umbrella of one treatment. The equation does not hold for the highly structured solvents. For these, the dielectric constants predicted on the basis of the acceptor and donor numbers are orders of magnitude larger than the experimental values, revealing how poorly the associates are dissociated by the macroscopically attainable electric fields.
    Materialart: Digitale Medien
    URL: http://dx.doi.org/10.1007/BF00645354
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  • 6
    Digitale Medien
    Digitale Medien
    Microbial conversion of sterols (1982)
    Springer
    Applied microbiology and biotechnology 15 (1982), S. 25-32 
    Details
    ISSN: 1432-0614
    Quelle: Springer Online Journal Archives 1860-2000
    Thema: Biologie , Werkstoffwissenschaften, Fertigungsverfahren, Fertigung
    Notizen: Abstract By preselection of microorganisms which preferentially attack the side chain of cholesterol we have been able to isolate a mutant of Corynebacterium spec. Chol 73 which forms 20-carboxy-pregna-1,4-dien-3-one (BNC) from cholesterol in nearly quantitative yields. The structure of this compound has been established by means of13C NMR-,1H NMR and CD spectroscopy.
    Materialart: Digitale Medien
    URL: http://dx.doi.org/10.1007/BF01875396
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  • 7
    Digitale Medien
    Digitale Medien
    Descriptive nomenclature and classification of pyroclastic deposits and fragments (1981)
    Springer
    International journal of earth sciences 70 (1981), S. 794-799 
    Details
    ISSN: 1437-3262
    Quelle: Springer Online Journal Archives 1860-2000
    Thema: Geologie und Paläontologie
    Beschreibung / Inhaltsverzeichnis: Abstract The IUGS Subcommission on the Systematics of Igneous Rocks herein presents its recommendations on the nomenclature and classification of pyroclastic and mixed pyroclastic-epiclastic deposits using descriptive, mainly granulometric, criteria. The recommendations are the result of an international inquiry by means of questionnaires during the last four years.
    Kurzfassung: Résumé La »Subcommission on the Systematics of Igneous Rocks« de l'IUGS présente ici ses recommendations pour la dénomination et la classification des roches pyroclastiques et pyroclastiques-épiclastiques selon arguments descriptives, surtout granulométriques. Ces recommendations représentent le résultat d'une enquête internationale exécutée pendant les quatres années passées.
    Notizen: Zusammenfassung Die „IUGS Subcommission on the Systematics of Igneous Rocks“ unterbreitet hier ihre Empfehlungen für die Benennung und Klassifizierung pyroklastischer sowie gemischt pyroklastisch-epiklastischer Ablagerungen auf Grund deskriptiver, hauptsächlich granulometrischer, Kriterien. Diese Empfehlungen sind das Resultat einer internationalen Umfrage mittels Fragebogen, die sich über die letzten vier Jahre erstreckte.
    Materialart: Digitale Medien
    URL: http://dx.doi.org/10.1007/BF01822152
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  • 8
    Digitale Medien
    Digitale Medien
    Influence of otolithic stimulation by horizontal linear acceleration on optokinetic nystagmus and visual motion perception (1980)
    Springer
    Experimental brain research 39 (1980), S. 165-176 
    Details
    ISSN: 1432-1106
    Schlagwort(e): Vestibular system ; Optokinetic ; Otoliths ; Eye movements ; Motion perception
    Quelle: Springer Online Journal Archives 1860-2000
    Thema: Medizin
    Notizen: Summary Several studies in the past have demonstrated the existence of an Otolith-Ocular Reflex (OOR) in man, although much less sensitive than canal ocular reflex. The present paper 1 confirms these previous results. Nystagmic eye movements (L-nystagmus) appear in the seated subject during horizontal acceleration along the interaural axis in the dark for an acceleration level (1 m/s2) about ten times the perception threshold with a sensitivity of about 0.035 rad/m. When sinusoidal linear acceleration is combined with optokinetic stimulation, the recorded nystagmus slow phase velocity exhibits strong periodic modulation related to subject motion. This marked effect of linear acceleration on the optokinetic nystagmus (OKN) appears at a level (0.1 m/s2) close to the acceleration perception threshold and has a 4-fold higher sensitivity than L-nystagmus. Modulation of OKN can reach a peak-to-peak amplitude as great as 20 °/s; for a given optokinetic field size it increases with the velocity of the optokinetic stimulus, i.e. with the slow phase eye velocity. In parallel with changes in OKN slow phase velocity, linear acceleration induces a motion related decrease in the perceived velocity of the visual scene and modifications in selfmotion perception. The results are interpreted in terms of a mathematical model of visual-vestibular interaction. They show that sensory interaction processes can magnify the contribution given to the control of eye movements by the otolithic system and provide a way of exploring its function at low levels of acceleration.
    Materialart: Digitale Medien
    URL: http://dx.doi.org/10.1007/BF00237547
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  • 9
    Digitale Medien
    Digitale Medien
    Unidirectional habituation of vestibulo-ocular responses by repeated rotational or optokinetic stimulations in the cat (1981)
    Springer
    Experimental brain research 42 (1981), S. 34-42 
    Details
    ISSN: 1432-1106
    Schlagwort(e): Vestibulo-ocular reflex ; Optokinetic nystagmus ; Vestibular habituation ; Cat
    Quelle: Springer Online Journal Archives 1860-2000
    Thema: Medizin
    Notizen: Summary 1.Unilateral habituation of the vestibuloocular reflex was produced in adult cats stimulated by repeated unidirectional velocity steps (vestibular training) or by a continuously moving visual surround (optokinetic training). — 2. Unidirectional vestibular training produced a strong asymmetry of vestibuloocular responses (VOR). Responses to velocity steps applied to the “trained” labyrinth were decreased both in gain and in time-constant. This effect generalized to responses to sinusoidal oscillations (0.03 Hz to 0.1 Hz), i.e. to a stimulus not used during training. — No spontaneous nystagmus was ever observed in spite of the dynamic VOR asymmetry. — 3. Unilateral vestibular habituation produced by vestibular training appeared to be a long-lasting phenomenon. It was still present 10 days after the end of training. — 4. Optokinetic responses were not affected by vestibular training. — 5. Unidirectional optokinetic training produced an increase in the slow phase velocity of optokinetic nystagmus (OKN) by about 25% in both directions. This effect did not persist for more than a few minutes. A marked spontaneous nystagmus was recorded in the dark after each session of optokinetic training, with a slow phase in the direction opposite to the previous OKN. — 6. VOR in response to velocity steps and to sinusoidal oscillations were decreased unilaterally after optokinetic training. This effect was of short duration, however, and disappeared within the interval between training sessions. This lack of retention contrasted with the prolonged effect of vestibular training.
    Materialart: Digitale Medien
    URL: http://dx.doi.org/10.1007/BF00235726
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  • 10
    Digitale Medien
    Digitale Medien
    Saccadic responses evoked by presentation of visual and auditory targets (1982)
    Springer
    Experimental brain research 47 (1982), S. 417-427 
    Details
    ISSN: 1432-1106
    Schlagwort(e): Saccades ; Audio-ocular responses ; Fixation ; Sound localization
    Quelle: Springer Online Journal Archives 1860-2000
    Thema: Medizin
    Notizen: Summary Saccadic eye movements evoked by the presentation of visual and auditory targets were examined and compared. Differences were found either in the pattern of the saccadic response and in the characteristics of single saccades of the same amplitude. The longer latency and the higher percentage of multiple saccade responses in the auditory case were attributed to a more complex central processing, whereas the longer duration and the lower peak velocity of the saccades to auditory targets were attributed to reduced performances of the execution mechanism in the absence of vision.
    Materialart: Digitale Medien
    URL: http://dx.doi.org/10.1007/BF00239359
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