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  • 1995-1999  (3)
  • Pelargonium xhortorum  (2)
  • Measurement techniques, pulse oximetry: accuracy  (1)
  • 1
    Electronic Resource
    Electronic Resource
    Development of a mite bioassay to evaluate plant resistance and its use in determining regeneration of spider mite resistance (1996)
    Springer
    Entomologia experimentalis et applicata 81 (1996), S. 301-305 
    Details
    ISSN: 1570-7458
    Keywords: Pelargonium xhortorum ; host-plant resistance ; geraniums ; anacardic acids ; bioassay ; regeneration ; Tetranychus urticae
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology
    Notes: Abstract The zonal geranium (Pelargonium xhortorum) possesses tall glandular trichomes that secrete anacardic acids, a viscous, sticky exudate which has been suggested as the primary mechanism in two-spotted spider mite (Tetranychus urticae Koch) resistance. A new bioassay was developed using small Plexiglas® cylinders as chambers for evaluating the resistance of geranium leaves to the two-spotted spider mite. This bioassay was easy to prepare, required only 24 hours to conduct, exhibited no problems with desiccation, condensation, or mite accountability, and yielded reproducible results. This bioassay was then used to study the regeneration of resistance of attached geranium leaves after they were made mite-susceptible by removing the excreted anacardic acids with water. Washed leaves regained full resistance after 14 days.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00187039
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    Paper (German National Licenses)
    Fulltext
  • 2
    Electronic Resource
    Electronic Resource
    The effect of pulsating arteries on reflectance pulse oximetry: Measurements in adults and neonates (1995)
    Springer
    Journal of clinical monitoring and computing 11 (1995), S. 118-122 
    Details
    ISSN: 1573-2614
    Keywords: Measurement techniques, pulse oximetry: accuracy ; Monitoring: hemoglobin oxygen saturation
    Source: Springer Online Journal Archives 1860-2000
    Topics: Computer Science , Medicine
    Notes: Abstract Objective. The objective of our study was to describe the results from human experiments during normoxia that demonstrate the effect of pulsating arteries on the measured arterial oxygen saturation (Spo2) using a reflectance pulse oximeter sensor.Methods. In 6 healthy adults and 7 healthy neonates, a Nellcor reflection sensor (FS-10 oxisensor, Nellcor, Inc., Pleasanton, CA) was placed in three different positions: (1) on the forehead, (2) on the temporal area, with the photodiode placed over the superficial temporal artery, and (3) on the temporal area, with the light-emitting diodes (LEDs) placed over the superficial temporal artery.Results. Placement of the sensor in position 2 resulted in a significantly lower Spo2 reading, compared to sensor position 1: 5.8% (p〈0.01) lower for adults and 7.5% (p〈0.01) lower for neonates. Placement of the sensor in position 3 resulted in significantly larger plethysmographic signals, compared to sensor position 1; but, the Spo2 readings were alike.Conclusions. Pulsating arteries can affect the reliability of reflection pulse oximetry. Depending on the position of the sensor, a falsely low Spo2 value can be observed.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF01617733
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    Paper (German National Licenses)
    Fulltext
  • 3
    Electronic Resource
    Electronic Resource
    Tissue-Specific Fatty Acid Composition of Glandular Trichomes of Mite-Resistant and -Susceptible Pelargonium xhortorum (1999)
    Springer
    Journal of chemical ecology 25 (1999), S. 955-968 
    Details
    ISSN: 1573-1561
    Keywords: Fatty acids ; geraniums ; glandular trichomes ; glycolipids ; Pelargonium xhortorum ; phospholipids ; ω5-unsaturated fatty acids
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology , Chemistry and Pharmacology
    Notes: Abstract Anacardic acids, alkyl phenolic acids excreted by tall glandular trichomes of the garden geranium, Pelargonium xhortorum, confer small-pest resistance. Up to 90% of the trichome exudate from mite-resistant P. xhortorum inbreds consists of an unusual anacardic acid with an unsaturated omega-5 (ω5) alkyl chain. As fatty acids are biochemical precursors to anacardic acids, we examined by GC the fatty acid composition of leaves, pedicels, petals, sepals, mature seeds, and glandular trichomes from pest-resistant and pest-susceptible Pelargonium inbred lines to determine the localization of ω5-fatty acids within plant tissues. The fatty acid composition of lipid classes (galactolipids, phospholipids, and neutral lipids) extracted from glandular trichomes from mite-resistant pedicels were also examined. ω5-Fatty acids (16:1Δ11 and 18:1Δ13) were found only in the glandular trichomes from pest-resistant geraniums (27.2% in trichomes of pedicels) and were localized predominantly in the phospho- and galactolipids (phosphatidylinositol, 25.9%; phosphatidylcholine, 18.2%; monogalactosyldiglyceride, 15.5%; and diglactosyldiglyceride, 14.0%).
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1023/A:1020865322035
    Library Location Call Number Volume/Issue/Year Availability
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    Paper (German National Licenses)
    Fulltext
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