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  • 1
    ISSN: 1573-5036
    Keywords: Allelopathy ; Bioassay ; Mass ; Soil ; Spectrometry ; Stress ; Tillage ; Wheat
    Source: Springer Online Journal Archives 1860-2000
    Topics: Agriculture, Forestry, Horticulture, Fishery, Domestic Science, Nutrition
    Notes: Summary Incorporating allelopathy into agricultural management may reduce the use of herbicides, cause less pollution, and diminish autotoxic hazards. Authentic inhibitors isolated from plant material have been subjects for examinationin vitro, but attempts to compare their effects in soils are limited. Soils contain a heterogeneous collection of organic matter of various origins. Organic solvents and water extracts prepared from monoculture wheat soils under conventional tillage (CT) and no tillage (NT) indicated that both soils contain some inhibitory compounds. The CGC/MS/DA of some of the organics is presented. Selected organics from CT and NT as well as allelopathic and autotoxic effects are described and discussed. The relationship between the wheat yeilds in CT and NT and the possible biological stress is indicated.
    Type of Medium: Electronic Resource
    Library Location Call Number Volume/Issue/Year Availability
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  • 2
    Electronic Resource
    Electronic Resource
    Chichester : Wiley-Blackwell
    Biological Mass Spectrometry 28 (1993), S. 534-541 
    ISSN: 0030-493X
    Keywords: Chemistry ; Analytical Chemistry and Spectroscopy
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Notes: The collision-induced decomposition spectra of electrospray-produced molecule ions were investigated on a hybrid tandem mass spectrometer. The molecular mass of the peptides investigated ranged from m/z 409 (as the singly protonated molcule ion) to 1758 (as the singly, doubly and triply protonated molecules). The effect of changing the center-of-mass collision energy by changing either the laboratory collision energy or the mass of the target gas was investigated. The spectra of all ions investigated showed a large number of sequence ions representative of the peptides' structures.
    Additional Material: 9 Ill.
    Type of Medium: Electronic Resource
    Library Location Call Number Volume/Issue/Year Availability
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