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  • 1
    Electronic Resource
    Electronic Resource
    [1,3]Dioxolo[5,6][1]benzothieno[2,3-c]-quinolin-6(5H)-ones (1995)
    Springer
    Monatshefte für Chemie 126 (1995), S. 1253-1256 
    Details
    ISSN: 1434-4475
    Keywords: Heterocycles ; 1H NMR ; Synthesis
    Source: Springer Online Journal Archives 1860-2000
    Topics: Chemistry and Pharmacology
    Description / Table of Contents: Zusammenfassung Die Reaktion von 3,4-Methylendioxyzimtsäure (1) mit Thionylchlorid ergab 7-Chlorothieno[2,3-f]-1,3-benzodioxol-6-carbonsärechlorid (2) und Zimtsäurechlorid (3). Darauffolgende Umsetzung von2 mit substituierten Anilinen führte zur Bildung von 7-Chloro-N-(p-X-phenyl)-thieno[2,3-f]-1,3-benzodioxol-6-carboxamiden (4a–c), welche mittels Photocyclisierung in akzeptablen Ausbeuten zu 2-substituierten [1,3]Dioxolo[5,6][1]benzothieno[2,3-c]chinolin-6(5H)-onen (5a–c) hoher Reinheit umgesetzt wurden. Die Strukturen wurden durch spektroskopische (IR,1H-NMR) und analytische Methoden bestätigt.
    Notes: Summary The reaction of 3,4-methylenedioxycinnamic acid (1) with thionyl chloride resulted in the formation of 7-chlorothieno[2,3-f]-1,3-benzodioxole-6-carbonyl chloride (2) and cinnamoyl chloride (3). Subsequent reaction of the former withp-substituted anilines led to the formation of 7-chloro-N-(p-substituted phenyl)-thieno[2,3-f]-1,3-benzodioxole-6-carboxamides (4a–c) which on photocyclization afforded 2-substituted [1,3]dioxolo[5,6][1]benzothieno[2,3-c]quinolin-6(5H)-ones (5a–c) in fairly good yields and high purity. The structures have been confirmed by IR,1H NMR, and analytical methods.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00824304
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  • 2
    Electronic Resource
    Electronic Resource
    Chlorosis in sugarcane: Associated soil properties, leaf mineral composition, and crop response to iron and manganese (1990)
    Springer
    Nutrient cycling in agroecosystems 22 (1990), S. 129-136 
    Details
    ISSN: 1573-0867
    Keywords: Fe-deficiency ; leaf mineral composition ; sugarcane chlorosis
    Source: Springer Online Journal Archives 1860-2000
    Topics: Agriculture, Forestry, Horticulture, Fishery, Domestic Science, Nutrition
    Notes: Abstract Attempts were made to find out the nature and cause of a widespread sugarcane chlorosis in a cane growing area. Soils from chlorotic and nonchlorotic fields did not differ markedly in pH, CaCO3, electrical conductivity, organic C, and soil test P, Zn, Cu, and Mn levels, but the chlorotic field soils had relatively more NH4OAc-extractable K and less clay and DTPA-extractable Fe. Chlorotic and green leaf blades contained about the same concentration of P, S, Mg, Fe, Zn, Cu, and Mo, but the former leaf blades had more K and less Ca and HCl soluble Fe than the green ones. Green leaves of plants that seemed to have naturally recovered in chlorotic fields were higher in Mn. A foliage spray with 2.5% FeSO4.7H2O solution resulted in greening of leaves and a field experiment showed marked crop response to Fe and some response to Mn. The results thus suggest that the chlorosis is due to a lime-induced Fe-deficiency with the possibility of some role of Mn in Fe nutrition in calcareous soil conditions.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF01120387
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  • 3
    Electronic Resource
    Electronic Resource
    Genetic nature of self-incompatibility in annual chrysanthemum (1960)
    Springer
    Cellular and molecular life sciences 16 (1960), S. 364-365 
    Details
    ISSN: 1420-9071
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology , Medicine
    Notes: Zusammenfassung Es werden Beweise für die sporophytische Determinierung der Selbst-Inkompatibilität vonChrysanthemum carinatum erbracht. Die Resultate weisen auch darauf hin, dass die Inkompatibilitäts-Allele im Pollen Dominanz zeigen, während sie im Griffel unabhängig sind. Der Inkompatibilitäts-Typus in dieser Pflanze stimmt mit jenem vonParthenium undCrepis überein, weicht aber von dem beiCosmos gefundenen ab. Es wird angenommen, dass das Schema, wie es bei den erstgenannten Gattungen nachgewiesen wurde, typisch ist für die Familie der Kompositen.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF02157907
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  • 4
    Electronic Resource
    Electronic Resource
    A model to predict the zinc status of soils for maize (1989)
    Springer
    Plant and soil 116 (1989), S. 49-55 
    Details
    ISSN: 1573-5036
    Keywords: alluvial soils ; environmental conditions ; maize ; soil properties ; soil Zn status ; soil Zn tests
    Source: Springer Online Journal Archives 1860-2000
    Topics: Agriculture, Forestry, Horticulture, Fishery, Domestic Science, Nutrition
    Notes: Abstract The objective of this study, carried out over 2 years, was to evaluate the effect of soil properties on the response of maize (Zea mays L.) to zinc applications and relate these properties to soil test Zn for predicting the Zn status of soils considering the effect of environmental conditions. The relative yield, expressed as an index of crop response, was related through multiple regression to CEC (or clay), electrical conductivity (or exchangeable Na), and bulk density consistently throughout the two year period that included one relatively wet, cool and cloudy growing season when variations in relative yield were explained also by 0.5M NaHCO3-extractable-P and organic C. A procedure is presented to establish limits for the soil propeties and soil-test-extractable-Zn and to meaningfully combine them into a model to predict soil Zn status. A model that combined soil test Zn, texture and electrical conductivity was satisfactory for the purpose of prediction and for adoption for soil testing on a routine basis. The suggested approach may be suitable for designing models with soil properties associated with crop responses to micronutrients in other situations.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF02327256
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  • 5
    Electronic Resource
    Electronic Resource
    Chlorophyll variegation caused by unstable behavior of an alien chromosome in hybrid derivatives ofNicotiana species (1968)
    Springer
    Genetica 39 (1968), S. 193-208 
    Details
    ISSN: 1573-6857
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology
    Notes: Abstract The hybrid derivatives ofNicotiana tabacum (2n=48) (female parent) andN. plumbaginifolia (2n=20) carried a variable number ofN. plumbaginifolia (pbg) chromosomes inN. tabacum (tbc) nuclei. Onepbg chromosome carried a gene for chlorophyll (Ws, pbg) and thetbc genome was homozygous recessive for the white seedling lociws 1,ws 1,ws 2.ws 2. The hybrid derivatives showed chlorophyll variegation. Thepbg chromosome, carrying the geneWs (pbg) for chlorophyll production, also carried information for a particular intensity of variegation. The alien chromosome formed anaphase bridges in the somatic tissue and led to subsequent loss of chromatin material having theWs pbg gene, resulting in leaf-color variegation. The intensity of this variegation was determined by information contained in this same chromosome. Either a chromatid type of breakage-fusion-bridge cycle, or formation of independent mitotic bridges by allocyclic segments ofpbg chromosomes, followed by their unequal breakage and restitution of the broken ends, has been hypothesized to be the cause of loss of chromatin material and subsequently of chlorophyll variegation.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF02324462
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