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  • 11
    Digitale Medien
    Digitale Medien
    3-Nitroso-4-hydroxy-5,6-benzocoumarin as a specific reagent for the detection of cobalt (1975)
    Springer
    Microchimica acta 63 (1975), S. 675-680 
    Details
    ISSN: 1436-5073
    Quelle: Springer Online Journal Archives 1860-2000
    Thema: Chemie und Pharmazie
    Beschreibung / Inhaltsverzeichnis: Zusammenfassung Die Komplexbildung von 3-Nitroso-4-hydroxy-5,6-benzocoumarin mit Kobalt dient zu dessen Nachweis in Gegenwart verschiedener üblicher Ionen. Die Tüpfelreaktion wurde mit Erfolg für den Kobaltnachweis in Legierungen verwendet.
    Notizen: Summary The complexation of 3-nitroso-4-hydroxy-5,6-benzocoumarin with cobalt is used to detect cobalt in presence of various common ions. The spot test has been successfully used for the detection of cobalt in alloys.
    Materialart: Digitale Medien
    URL: http://dx.doi.org/10.1007/BF01217328
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  • 12
    Digitale Medien
    Digitale Medien
    Polarographic studies of indium(III) complexes with some disubstituted pyridines (1977)
    Springer
    Monatshefte für Chemie 108 (1977), S. 361-366 
    Details
    ISSN: 1434-4475
    Quelle: Springer Online Journal Archives 1860-2000
    Thema: Chemie und Pharmazie
    Notizen: Abstract Complex formation of indium(III) with three disubstituted pyridines, viz., 2,3-dihydroxypyridine, 2-amino-3-hydroxypyridine and 3-hydroxypyridine-2-thiol has been studied polarographically (μ=0.1; temp.=25±0.1°C). All the systems show reversible electrode behaviour.DeFord andHume method as modified byIrving has been applied for determining composition and stability constants. Distribution of different species as a function of ligand concentration has been calculated and shown graphically.
    Materialart: Digitale Medien
    URL: http://dx.doi.org/10.1007/BF00901988
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  • 13
    Digitale Medien
    Digitale Medien
    Formation constants of bivalent metal ion complexes with diphenyl violuric acid and its higher analogues (1978)
    Springer
    Monatshefte für Chemie 109 (1978), S. 839-845 
    Details
    ISSN: 1434-4475
    Quelle: Springer Online Journal Archives 1860-2000
    Thema: Chemie und Pharmazie
    Beschreibung / Inhaltsverzeichnis: Zusammenfassung Die Stabilitätskonstanten von Übergangsmetallchelaten von 1,3-disubstituierten 5-Hydroximino-hexahydropyrimidin-2,4,6-trionen [Diphenyl-violursäure (DPhVA) und Di-o-,m- undp-tolyl-violursäure (DiToVA)] wurden in 75% wäßr. Dioxan bei 30±1°C unter Konstanthaltung der Ionenstärke (0,1M-NaClO4) bestimmt. Folgende Reihung wurde gefunden: $$UO_2 〉 Cu 〉 Ni \geqslant Fe 〉 Co 〉 Pb 〉 Zn 〉 Cd 〉 Mn.$$ Der stabilitätsbeeinflussende Effekt von π-Donor-Bindungen (Metall—Ligand) wurde nachgewiesen. Effekte von elektrophilen und nucleophilen Zentren innerhalb der Liganden wurden mit Stabilitätskonstanten der Chelate und Dissoziationskonstanten der Säuren korreliert.
    Notizen: Abstract Stability constants of transition-metal chelates of 1,3-disubstituted 5-hydroximino-hexahydropyrimidine-2,4,6-trione [diphenyl violuric acid (DPhVA) and di-o-,m-, andp-tolyl violuric acid (DiToVA)] have been determined in 75% dioxane (aqueous) at 30±1°C, in solutions containing an excess of the ligand at ionic strength 0.1M-NaClO4. The order of formation constants found is: $$UO_2 〉 Cu 〉 Ni \geqslant Fe 〉 Co 〉 Pb 〉 Zn 〉 Cd 〉 Mn.$$ The stability influencing effects of donor π-bond (metal to ligand) has been demonstrated. The effects of electrophilic and nucleophilic centres within the ligand have been correlated to stability constants and acid dissociation constants.
    Materialart: Digitale Medien
    URL: http://dx.doi.org/10.1007/BF00907304
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  • 14
    Digitale Medien
    Digitale Medien
    Bond strengths and reproportionation constants of mixed ligand complexes of lanthanones (1978)
    Springer
    Monatshefte für Chemie 109 (1978), S. 847-852 
    Details
    ISSN: 1434-4475
    Quelle: Springer Online Journal Archives 1860-2000
    Thema: Chemie und Pharmazie
    Beschreibung / Inhaltsverzeichnis: Zusammenfassung Es wurden 1∶1∶1-Komplexe von Lanthaniden [Ln(III)] mit Nitrilotriessigsäure (NTA) und 2-Hydroxy-2,4,6-cycloheptatrien-1-on (Tropolon;TR) als gemischte Liganden potentiometrisch in 50% (v/v) wäßr. Dioxan bei μ≊0,1M-NaClO4 und 30±1°C untersucht. Die Komplexbildungskonstanten wurden mittels einer gewichteten Fehlerquadrat-Methode berechnet. Es zeigte sich, daßNTA undTR inkompatible Liganden gegenüberLn(III) sind und die gemischten Komplexe somit eine geringere Stabilität als die jeweiligen einfachen Komplexe haben.
    Notizen: Abstract 1↮1↮1 mixed ligand complexes of lanthanones with nitrilotriacetic acid (NTA) and 2-hydroxy-2,4,6-cycloheptatrien-1-one (tropolone:TR) have been studied potentiometrically in 50% (v/v) aq. dioxane medium at μ≅0.1M-NaClO4 at 30±1°C. For these systems, complexation of primary ligand (NTA) with lanthanones is complete before complexation withTR takes place. The formation constants have been calculated by a weighted least squares method. The results show thatNTA andTR are incompatible ligands towards lanthanones and hence the mixed ligand complexes formed have lower stability than either of the parent complexes.
    Materialart: Digitale Medien
    URL: http://dx.doi.org/10.1007/BF00907305
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  • 15
    Digitale Medien
    Digitale Medien
    Genetics of resistance to Puccinia graminis tritici in ‘Chris’ and ‘W3746’ wheats (1987)
    Springer
    Theoretical and applied genetics 73 (1987), S. 846-855 
    Details
    ISSN: 1432-2242
    Schlagwort(e): Puccinia graminis tritici ; Triticum aestivum ; Monosomic analysis ; Rust resistance ; Gene identification
    Quelle: Springer Online Journal Archives 1860-2000
    Thema: Biologie
    Notizen: Summary ‘Chris’ wheat possessed genes Sr5, Sr7a, Sr8a, Sr9g and Sr12. ‘W3746’, derived from the cross ‘Chris’/‘Baart’, possessed Sr7a and Sr12. The response conferred by Sr7a was influenced by the genetic background. Although Sr7a or Sr12 alone conferred no observable resistance upon adult plants, the adult resistances of ‘Chris’ and ‘W3746’ to predominant pathotypes appeared to be associated with the interaction of Sr7a and Sr12, or genes at closely linked loci.
    Materialart: Digitale Medien
    URL: http://dx.doi.org/10.1007/BF00289389
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  • 16
    Digitale Medien
    Digitale Medien
    Detection and estimation of components of genetic variation for some metric traits in tomato (Lycopersicon esculentum Mill) (1985)
    Springer
    Theoretical and applied genetics 70 (1985), S. 80-84 
    Details
    ISSN: 1432-2242
    Schlagwort(e): Genetic variation ; Metric trait ; Tomato ; Triple test cross
    Quelle: Springer Online Journal Archives 1860-2000
    Thema: Biologie
    Notizen: Summary Sixty families from two tomato triple test crosses (S120 x EC61747 and EC31513 x ‘Tusa Ruby’) were raised in complete randomized blocks in two replications and two environments (two fertilizer levels). Jinks and Perkins' (1970) analysis was used to detect and estimate the additive, dominance and epistatic components of genetic variation for flowering time, maturity period, number of branches per plant, final height, shape index of fruit, locule number, number of fruits per plant, yield per plant and weight per fruit. The j & 1 type epistasis was more important than the i type epistasis in the first cross, while in the second cross the two components of epistasis played almost equal roles in the control of characters studied. Both the D (additive) and H (dominance) components were significant for most of the characters in both crosses and in both the environments. The D component was relatively more important than the H component in the first cross, while the situation was just the reverse in the second cross. Dominance was directional in 8 out of 36 cases. Ambidirectional dominance was observed in 27 cases. A real absence of dominance was observed in one case only.
    Materialart: Digitale Medien
    URL: http://dx.doi.org/10.1007/BF00264486
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  • 17
    Digitale Medien
    Digitale Medien
    New disease symptoms observed on field-grown potato plants with potato spindle tuber viroid and potato virus Y infections (1987)
    Springer
    Potato research 30 (1987), S. 127-133 
    Details
    ISSN: 1871-4528
    Schlagwort(e): Synergistic reaction ; necrotic symptoms ; virus concentration ; ELISA ; PAGE
    Quelle: Springer Online Journal Archives 1860-2000
    Thema: Land- und Forstwirtschaft, Gartenbau, Fischereiwirtschaft, Hauswirtschaft
    Notizen: Summary Potato spindle tuber viroid (PSTV) and potato virus Y (PVY) were isolated from plants of cultivar Kennebec with severe necrotic symptoms in the field. In the greenhouse, severe necrotic symptoms were reproduced only when potato plants were infected either simultaneously with PSTV+PVY, or with PSTV prior to PVY infection. Thirteen additional potato cultivars were tested in the greenhouse for this synergistic reaction and eight developed necrotic responses similar to cv. Kennebec. PVY concentration was significantly higher in doubly infected plants, compared with those infected with PVY alone.
    Materialart: Digitale Medien
    URL: http://dx.doi.org/10.1007/BF02357692
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  • 18
    Digitale Medien
    Digitale Medien
    Comparative detection of mild strains of potato spindle tuber viroid from the dormant potato tubers by Return-polyacrylamiee gel electrophoresis and nucleic acid hybridization (1988)
    Springer
    Potato research 31 (1988), S. 159-166 
    Details
    ISSN: 1871-4528
    Schlagwort(e): sensitivity ; routine testing ; silver staining ; dot-blot ; severe strain ; separation of strains
    Quelle: Springer Online Journal Archives 1860-2000
    Thema: Land- und Forstwirtschaft, Gartenbau, Fischereiwirtschaft, Hauswirtschaft
    Notizen: Summary Using a modified procedure of Return-polyacrylamide gel electrophoresis (R-PAGE) mild strains of potato spindle tuber viroid (M-PSTV) were detected reliably from dormant tubers. The sensitivity of R-PAGE detection of M-PSTV was equivalent to that of nucleic acid hybridization. Both methods detected M-PSTV when infected tissue was mixed with healthy tissue in a ratio of 1 to 100. When extracted nucleic acid was diluted with buffer, R-PAGE detected PSTV at a dilution of 1:256 and nucleic hybridization only up to 1:64 PSTV was readily detected from 18 potato cultivars. In addition, mild, ‘intermediate’ and severe strains were separated by R-PAGE, on the basis of their mobility on the electrophorogram.
    Materialart: Digitale Medien
    URL: http://dx.doi.org/10.1007/BF02360033
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  • 19
    Digitale Medien
    Digitale Medien
    Selective cation exchange separation of bismuth on zirconium hexacyanoferrate(III) column (1985)
    Springer
    Journal of radioanalytical and nuclear chemistry 89 (1985), S. 3-11 
    Details
    ISSN: 1588-2780
    Quelle: Springer Online Journal Archives 1860-2000
    Thema: Chemie und Pharmazie , Energietechnik
    Notizen: Abstract A new inorganic ion exchanger, zirconium hexacyanoferrate(III) prepared by adding potassium hexacyanoferrate(III) to zirconium oxychloride at 80°C has been found to be stable in acids and salt solutions. Distribution coefficient values determined for various metal ions show that the exchanger has a high affinity for bismuth. Binary separations of Bi(III) from a number of other metal ions at different concentrations were achieved on the column of the exchanger. Thus the exchanger has been found useful for the separation of bismuth from a large number of metals.
    Materialart: Digitale Medien
    URL: http://dx.doi.org/10.1007/BF02070198
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  • 20
    Digitale Medien
    Digitale Medien
    Studies on the therapeutic effects of thiophanate in pica-affected camels (1978)
    Springer
    Tropical animal health and production 10 (1978), S. 61-62 
    Details
    ISSN: 1573-7438
    Quelle: Springer Online Journal Archives 1860-2000
    Thema: Medizin
    Materialart: Digitale Medien
    URL: http://dx.doi.org/10.1007/BF02235306
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