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  • 1
    Electronic Resource
    Electronic Resource
    Magnesium deficiency of kiwifruit (Actinidia deliciosa) (1987)
    Springer
    Plant and soil 104 (1987), S. 281-289 
    Details
    ISSN: 1573-5036
    Keywords: Actinidia deliciosa ; foliar analysis ; kiwifruit ; magnesium deficiency ; mineral nutrition ; postharvest fruit storage
    Source: Springer Online Journal Archives 1860-2000
    Topics: Agriculture, Forestry, Horticulture, Fishery, Domestic Science, Nutrition
    Notes: Abstract Magnesium deficiency was associated with large yield reductions in a five-year-old commercial kiwifruit (Actinidia deliciosa) orchard. The effect on yield resulted primarily from a reduction in fruit numbers, there being no difference in mean fruit weight between fruit harvested from affected and unaffected vines. Magnesium deficiency had no deleterious effect on postharvest storage characteristics of fruit stored at 0.5–1°C for 18 weeks; fruit from deficient vines were firmer but had slightly lower soluble solids than fruit from control vines. Although deficiency symptoms were first observed on the basal leaves of the non-fruiting shoots mid season, indications of the impending deficiency could be established very early in the season using foliar analysis. Magnesium concentrations in youngest fully expanded leaves (YFEL) on the affected vines were less than 2.0 g kg−1 DM four weeks after budbreak and remained below this value for the rest of the season; concentrations in YFEL on unaffected vines did not decrease below this value and gradually increased after fruitset to 4.5 g kg−1 DM at harvest. To avert potential production losses, it is suggested that soluble magnesium fertilizers (containing at least 200 kg ha−1 Mg) should be broadcast early in the season if foliar magnesium concentrations less than 2.0 gkg−1 DM are measured four–six weeks after budbreak.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF02372543
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  • 2
    Electronic Resource
    Electronic Resource
    Selectivity studies on branched and linear alkyl bonded stationary phases in reversed-phase liquid chromatography (1991)
    Springer
    Chromatographia 32 (1991), S. 365-372 
    Details
    ISSN: 1612-1112
    Keywords: Column liquid chromatography ; Alkyl bonded phases ; Selectivity studies ; N-alkylbenzamide congeners
    Source: Springer Online Journal Archives 1860-2000
    Topics: Chemistry and Pharmacology
    Notes: Summary Reversed-phase liquid chromatographic retention characteristics for the sixteen acyclic C1−C5 N-alkylbenzamide congeners were measured on various branched and linear, alkyl bonded hydrocarbon stationary phases. Retention factors, k′, were determined in acetonitrile-water mobile phase compositions on ethyl, n-octyl, n-dodecyl, n-octadecyl, 1-ethyladamantyl, 4-butyloctyl, and 2,4,4-trimethylpentyl stationary phases. Statistical analysis of the two main effects investigated — type of stationary phase and percentage of organic modifier (acetonitrile) in the mobile phase — described greater than ninety percent of the variability in the data for most of the comparisons. Selectivity effects due to variation in the mobile phase dominated the results.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF02321435
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