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  • 1
    Digitale Medien
    Digitale Medien
    Primary afferent depolarization in the trigeminal spinal nucleus of cats (1977)
    Springer
    Experimental brain research 29 (1977), S. 45-56 
    Details
    ISSN: 1432-1106
    Schlagwort(e): Trigeminal nerve ; Primary afferent fiber ; Trigeminal spinal nucleus ; PAD ; Intra-axonal record
    Quelle: Springer Online Journal Archives 1860-2000
    Thema: Medizin
    Notizen: Summary Intra-axonal recordings were made from trigeminal primary afferent fibers in the trigeminal spinal nuclei oralis and caudalis of cats. Primary afferent depolarization (PAD) was evoked in these afferents by stimulation of the trigeminal peripheral sensory branches (the frontal, infraorbital and lingual nerves), the cerebral cortex and the trigeminal spinal nucleus caudalis. The properties of the PAD, including the threshold, latency, receptive field (sensory branches effective for PAD induction) and frequency-following capacity, were studied with the following results: 1. Stimulation of all the peripheral branches tested as well as the cerebral cortex could evoke PAD in the same single fiber. The latency of the PAD evoked by stimulation of the nerve in which the fiber being recorded from was included was generally shorter than that evoked by other branches. The PAD evoked by peripheral nerve stimulation was assumed to be disynaptic in some cases. 2. The peripherally evoked PAD was chiefly attributable to low threshold afferents in the stimulated sensory branches of the trigeminal nerve. 3. The peripherally evoked PAD could follow stimulation at up to 30/sec, though the amplitude was reduced. 4. Stimulation of the nucleus caudalis could evoke PAD with disynaptic latency in the majority of the fibers terminating in the same nucleus, whereas it evoked PAD with mainly polysynaptic latency in the fibers terminating in the nucleus oralis. The results are discussed in relation to the neuronal circuitry responsible for induction of the trigeminal PAD.
    Materialart: Digitale Medien
    URL: http://dx.doi.org/10.1007/BF00236874
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  • 2
    Digitale Medien
    Digitale Medien
    Analysis of the circuitry responsible for primary afferent depolarization in the trigeminal spinal nucleus caudalis of cats (1977)
    Springer
    Experimental brain research 29 (1977), S. 405-418 
    Details
    ISSN: 1432-1106
    Schlagwort(e): Trigeminal nerve ; PAD ; Trigeminal spinal nucleus caudalis ; Interneuron ; Subnucleus magnocellularis
    Quelle: Springer Online Journal Archives 1860-2000
    Thema: Medizin
    Notizen: Summary Depth analysis was performed on the field potential evoked by stimulation of the infraorbital nerve in the trigeminal spinal nucleus caudalis and the subjacent lateral reticular formation of cats. It was shown by dye marking of the recording positions that each subnucleus of the nucleus caudalis (subnucleus marginalis, gelatinosus and magnocellularis) and the reticular formation could be differentiated from one another by the characteristics of the peripherally evoked field potentials. Responses of neurons were extracellularly recorded in the subnuclei gelatinosus and magnocellularis of the nucleus caudalis and in the reticular formation to stimulation of the trigeminal sensory branches (the frontal, infraorbital and lingual nerves), the nucleus ventralis posteromedialis of the thalamus and the cerebral cortex. The properties of the neurons were studied in relation to their thresholds, latencies, receptive fields (sensory branches effective for spike generation) and frequency-following capacities. These responses were then compared with properties of the PAD induced in the fibers terminating in the nucleus caudalis by similar peripheral and central stimulation. It was found that the neurons in the subnucleus magnocellularis were the most likely candidates for the interneurons mediating the peripherally evoked disynaptic PAD in the trigeminal nerve fibers terminating in the nucleus caudalis.
    Materialart: Digitale Medien
    URL: http://dx.doi.org/10.1007/BF00236179
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  • 3
    Digitale Medien
    Digitale Medien
    Preparation of siloxane-like films by glow discharge polymerization (1984)
    New York, NY [u.a.] : Wiley-Blackwell
    Journal of Applied Polymer Science 29 (1984), S. 3595-3605 
    Details
    ISSN: 0021-8995
    Schlagwort(e): Chemistry ; Polymer and Materials Science
    Quelle: Wiley InterScience Backfile Collection 1832-2000
    Thema: Chemie und Pharmazie , Maschinenbau , Physik
    Notizen: Glow discharge polymerizations of tetramethoxysilane (TMOS), tetramethylsilane/oxygen mixture (½ molar ratio) (TMS/O2), hexamethyldisiloxane (HMDSO), and tetramethyldisiloxane (TMDSO) were carried out for the preparation of thin, polymeric films with siloxane structures. The chemical composition of the formed polymers was examined by elemental analysis, infrared spectroscopy, and electron spectroscopy for chemical analysis (ESCA) in connection with polymerization conditions, especially, a level of the radiofrequency (rf) input power per mass of the monomers (W/FM value). The polymers prepared from HMDSO at fairly low W/FM values resembled in chemical composition the conventionally polymerized polydimethylsiloxane. The surface properties of the formed polymers also were evaluated by the measurement of surface energy.
    Zusätzliches Material: 8 Ill.
    Materialart: Digitale Medien
    URL: http://dx.doi.org/10.1002/app.1984.070291133
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  • 4
    Digitale Medien
    Digitale Medien
    Surface characterization of styrene/acrylamide copolymer latex particles (1985)
    New York, NY [u.a.] : Wiley-Blackwell
    Journal of Applied Polymer Science 30 (1985), S. 3857-3866 
    Details
    ISSN: 0021-8995
    Schlagwort(e): Chemistry ; Polymer and Materials Science
    Quelle: Wiley InterScience Backfile Collection 1832-2000
    Thema: Chemie und Pharmazie , Maschinenbau , Physik
    Notizen: Surface characteristics of styrene/acrylamide copolymer latex particles prepared without emulsifier were investigated as a function of acrylamide fraction in charged monomers. The presence of swelling or water-soluble polymer layer at the particle surface was suggested, and its thickness increased with increasing acrylamide fraction. The surface charge densities by conductometric and potentiometric titrations wer about half that of polystyrene latex particles at low pH and they increased slightly with increasing pH. Regarding the heterocoagulation between styrene/acrylamide copolymer latex particles and polystyrene latex particles, the critical coagulation concentration of KCI decreased with increasing acrylamide fraction. The consideration in terms of the interaction due to electrostatic and van der Waals forces also suggested that the swelling or water-soluble polymer layer at the particle surface plays an important role.
    Zusätzliches Material: 7 Ill.
    Materialart: Digitale Medien
    URL: http://dx.doi.org/10.1002/app.1985.070300924
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