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  • Polymer and Materials Science  (2)
  • Locomotor rhythm  (1)
  • Optic lobe  (1)
  • YAC clone  (1)
  • 1990-1994  (4)
  • 1991  (4)
Sammlung
Schlagwörter
Verlag/Herausgeber
Erscheinungszeitraum
  • 1990-1994  (4)
Jahr
  • 1
    Digitale Medien
    Digitale Medien
    Mutual interactions between optic lobe circadian pacemakers in the cricket Gryllus bimaculatus (1991)
    Springer
    Journal of comparative physiology 169 (1991), S. 291-298 
    Details
    ISSN: 1432-1351
    Schlagwort(e): Circadian pacemaker ; Locomotor rhythm ; Optic lobe ; Pacemaker interaction ; Insect
    Quelle: Springer Online Journal Archives 1860-2000
    Thema: Biologie , Medizin
    Notizen: Summary The coupling mechanism between the bilaterally paired optic lobe circadian pacemakers in the cricket Gryllus bimaculatus was investigated by recording locomotor activity, under constant light or constant red light, after the optic nerve was unilaterally severed. 1. The majority (about 70%) of the animals showed a locomotor rhythm with 2 rhythmic components; one freerunning with a period of 25.33 ± 0.41 (SD) h and the other with 24.36 ± 0.37 (SD) h under constant light (Fig. 3A). 2. Removal of the intact side optic lobe abolished the longer period component (Fig. 4A), while the operation on the operated side caused a reverse effect (Fig. 4B), indicating that the longer and the shorter period components are driven by the pacemaker on the intact and the operated side, respectively. 3. The activity driven by a pacemaker was inhibited during the subjective day of the contralateral pacemaker (circadian time 0–10, Fig. 5). 4. The freerunning periods of the two components were not constant but varied as a function of the mutual phase angle relationship (Figs. 3A, 7, 8). These results suggest that the 2 optic lobe pacemakers weakly couple to one another and that the cricket maintains a stable temporal structure in its behavior through the phase-dependent mututal inhibition of activity and the phase-dependent freerunning period modulation.
    Materialart: Digitale Medien
    URL: http://dx.doi.org/10.1007/BF00206993
    Standort Signatur Erwartet Verfügbarkeit
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  • 2
    Digitale Medien
    Digitale Medien
    Material design for polymer/azobenzene liquid crystal/metal salt composite films possessing thermo- and photoresponsive ionic conductivity (1991)
    New York, NY [u.a.] : Wiley-Blackwell
    Journal of Applied Polymer Science 43 (1991), S. 1233-1239 
    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: Various azobenzene derivatives and polymers were attempted as materials for thin composite films containing a polymer, a liquid crystal, and lithium perchlorate which can undergo ionic-conductivity switching induced by light or heat. Poly(vinyl chloride) -based composite films containing enantiotropic azobenzene liquid crystals 1, exhibited significant ionicconductivity change based on thermo- and photoinduced phase transitions of 1, the temperature dependence on the ionic conductivity reflecting the enantiotropic phase transition behavior of the liquid crystals. Marked, reversible ionic-conductivity switching on alternating irradiation of UV and visible lights was attained with the composite films containing 1, especially 1 (n = 12). Incorporation of monotropic liquid crystals 3 to the composite films allowed bistability in the temperature dependence on the ionic conductivity. Employment of a polycarbonate resin and poly(methyl methacrylate) as the polymer material of the composite films gave similar ionic-conductivity changes to the poly(vinyl chloride) composite films, whereas polyethyleneoxide brought about some different results in the photoinduced ionic-conductivity change.
    Zusätzliches Material: 10 Ill.
    Materialart: Digitale Medien
    URL: http://dx.doi.org/10.1002/app.1991.070430704
    Standort Signatur Erwartet Verfügbarkeit
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  • 3
    Digitale Medien
    Digitale Medien
    Yeast artificil chromosome (YAC) clones and sequence tagged site (STS) markers anchored at human chromosome 21 (1991)
    Springer
    Journal of human genetics 36 (1991), S. 331-334 
    Details
    ISSN: 1435-232X
    Schlagwort(e): YAC clone ; human chromosome 21 ; STS marker ; PCR-mediated screening
    Quelle: Springer Online Journal Archives 1860-2000
    Thema: Biologie , Medizin
    Materialart: Digitale Medien
    URL: http://dx.doi.org/10.1007/BF01883607
    Standort Signatur Erwartet Verfügbarkeit
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  • 4
    Digitale Medien
    Digitale Medien
    Amperometric glucose sensor using silicon oxide deposited gold electrodes (1991)
    Weinheim : Wiley-Blackwell
    Electroanalysis 3 (1991), S. 469-475 
    Details
    ISSN: 1040-0397
    Schlagwort(e): Chemistry ; Polymer and Materials Science
    Quelle: Wiley InterScience Backfile Collection 1832-2000
    Thema: Chemie und Pharmazie
    Notizen: Glucose oxidase (GOD) immobilized electrodes using silicon oxide, were fabricated and their characteristics were evaluated. Silicon oxide deposited gold band (200 μm wide) and disk (1 mm diameter) electrodes were fabricated by vapor deposition of silicon monoxide. Alkylaminosilan and glutaraldehyde treatments were performed on the silicon oxide surface, followed by GOD immobilization. The GOD-immobilized band electrode treated with 3-aminopropyltriethoxysilane was characterized in a flow injection system. Hydrogen peroxide produced by the enzyme reaction was measured, resulting in a good response capable of high glucose concentration determination. The calibration curve was linear in the range between 1 to 200 mM. The GOD-immobilized disk electrode treated with 3-aminopropyldimethylethoxysilane was examined using electron transfer mediators. The effect of the thickness of silicon oxide on the response to glucose was investigated, leading to the highest, response at the electrode with the silicon oxide film that was 400 nm thick. In addition, a numerical analysis was performed, suggesting that immobilized GOD was located mainly in the vicinity of the silicon oxide surface.
    Zusätzliches Material: 8 Ill.
    Materialart: Digitale Medien
    URL: http://dx.doi.org/10.1002/elan.1140030605
    Standort Signatur Erwartet Verfügbarkeit
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