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  • 1
    facet.materialart.
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    Optimum Size of Sampling Unit to Estimate Coastal Bermudagrass Yield 1 (1975)
    Wiley
    Details
    Publication Date: 1975-07-01
    Print ISSN: 0002-1962
    Electronic ISSN: 1435-0645
    Topics: Agriculture, Forestry, Horticulture, Fishery, Domestic Science, Nutrition
    Published by Wiley
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    PAPER CURRENT
  • 2
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    Buchbesprechungen (1975)
    Springer
    Details
    Publication Date: 1975-03-01
    Print ISSN: 0044-2275
    Electronic ISSN: 1420-9039
    Topics: Mathematics , Physics
    Published by Springer
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  • 3
    Electronic Resource
    Electronic Resource
    Buchbesprechungen (1975)
    Springer
    Zeitschrift für angewandte Mathematik und Physik 26 (1975), S. 257-260 
    Details
    ISSN: 1420-9039
    Source: Springer Online Journal Archives 1860-2000
    Topics: Mathematics , Physics
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF01591517
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    Paper (German National Licenses)
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  • 4
    Electronic Resource
    Electronic Resource
    Beiträge zur Analyse nuklearer Rohmaterialien. IX (1975)
    Springer
    Microchimica acta 64 (1975), S. 569-579 
    Details
    ISSN: 1436-5073
    Source: Springer Online Journal Archives 1860-2000
    Topics: Chemistry and Pharmacology
    Description / Table of Contents: Summary A method is described for the separation ofμg-amounts of copper from large amounts of uranium and of making the end-determination accessible by means of atomic absorption spectrophotometry. The separation of the copper from uranium and from other foreign ions present in the uranium matrix is brought about through adsorption of the copper on a column of the strongly basic anionexchanger Dowex 1, X8 from a mixture that consists of 90 vol.% methanol and 10 vol.% hydrobromic acid. After the adsorbed copper is eluted by means of 3M hydrochloric acid the copper is determined by the atomic-absorption-spectrophotometric procedure. The method was applied for the determination of copper in standard specimens of U3O8 (1 to 11 p. p. m. Cu) and Yellow Cake (4 to 25 p. p. m. Cu).
    Notes: Zusammenfassung Eine Methode wurde beschrieben, um μg-Mengen Kupfer von großen Mengen Uran zu trennen und der Endbestimmung mittels Atomabsorptionsspektrophotometrie zugänglich zu machen. Die Abtrennung des Kupfers von Uran und anderen in der Uranmatrix anwesenden Fremdionen erfolgt durch Adsorption des Kupfers auf einer Säule des stark basischen Anionenaustauschers Dowex 1, X8 aus einer Mischung bestehend aus 90 Vol.% Methanol und 10 Vol.% 1,5-m Bromwasserstoffsäure. Nach Elution des adsorbierten Kupfers mittels 3-m Salzsäure wird dieses atomabsorptionsspektrophotometrisch bestimmt. Die Methode wurde zur Bestimmung von Kupfer in U3O8-Standardproben (l bis 11 p. p. m. Cu) und Yellow-Cake-Proben (4 bis 25 p. p. m. Cu) herangezogen.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF01219228
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  • 5
    Electronic Resource
    Electronic Resource
    Beiträge zur Analyse nuklearer Rohmaterialien. VIII (1975)
    Springer
    Microchimica acta 64 (1975), S. 413-424 
    Details
    ISSN: 1436-5073
    Source: Springer Online Journal Archives 1860-2000
    Topics: Chemistry and Pharmacology
    Description / Table of Contents: Summary A procedure is described for the separation of μg quantities of lead from large amounts of uranium and for making accessible an end-determination by means of atomic absorption spectrophotometry. The separation of the lead from the uranium and from other foreign ions present in the uranium matrix is accomplished by adsorption on a column of the strongly basic anion exchanger Dowex 1, X8 from 2M hydrobromic acid. Following elution of the adsorbed lead by means of 6M hydrochloric acid, the lead is determined either by means of atomic absorption spectrophotometry or by spectrophotometry with employment of the dithizone method. The procedure was employed for the determination of lead in standard specimens of U3O8 (0.17 to 1.8 p. p. m. Pb) and of Yellow Cake (7.8 to 88 p. p. m. Pb). A good agreement of the results was attained in all cases.
    Notes: Zusammenfassung Eine Methode wurde beschrieben, umμg-Mengen Blei von großen Mengen Uran zu trennen und der Endbestimmung mittels Atomabsorptionsspektrophotometrie zugänglich zu machen. Die Abtrennung des Bleis von Uran und anderen in der Uranmatrix anwesenden Fremdionen erfolgt durch Adsorption auf einer Säule des stark basischen Anionenaustauschers Dowex 1, X8 aus 2-m Bromwasserstoffsäure. Nach Elution des adsorbierten Bleis mittels 6-m Salzsäure wird es atomabsorptionsspektrophotometrisch oder auch spektrophotometrisch unter Anwendung der Dithizonmethode bestimmt. Die Methode wurde zur Bestimmung von Blei in U3O8-Standardproben (0,17 bis 1,8 p. p. m. Pb) und Yellow-Cake-Proben (7,8 bis 88 p. p. m. Pb) herangezogen. In allen Fällen wurde eine gute Übereinstimmung der Resultate erzielt.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF01219207
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  • 6
    Electronic Resource
    Electronic Resource
    Kairomones and their use for management of entomophagous insects: II. Mechanisms causing increase in rate of parasitization byTrichogramma spp. (1975)
    Springer
    Journal of chemical ecology 1 (1975), S. 349-360 
    Details
    ISSN: 1573-1561
    Keywords: Trichogramma achaeae ; Heliothis zea ; biological control ; kairomones ; pest management ; parasitoids ; host finding ; insect behavior ; pheromones ; behavior chemicals
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology , Chemistry and Pharmacology
    Notes: Abstract When the effect of the kairomone, tricosane, on parasitization byTrichogramma achaeae Nagaraja and Nagarkatti of eggs ofHeliothis zea (Boddie) was studied in petri dish tests, the greatest percentage parasitization ( $$\mathop X\limits^\_$$ = 64%) was obtained if the entire filter paper was treated. Treatment of smaller areas (about the eggs) resulted in decreased parasitism. In the greenhouse, highest parasitization ( $$\mathop X\limits^\_$$ = 71%) byT. pretiosum (Riley) ofH. zea eggs placed on pea seedlings grown in pie pans was obtained if the whole pan was treated; lowest parasitism ( $$\mathop X\limits^\_$$ = 29%) occurred when the pans were untreated. Parasitization was intermediate ( $$\mathop X\limits^\_$$ = 52%) in other pans treated only at selected spots. Dissections ofH. zea eggs collected from kairomonetreated and untreated field plots revealed that eggs ofTrichogramma spp. were more efficiently distributed (less superparasitism) among host eggs in treated plots. These kairomones increase parasitization ofTrichogramma spp. by releasing and continuously reinforcing an intensified searching behavior rather than by attracting and guiding the parasite directly to the host.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00988837
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  • 7
    Electronic Resource
    Electronic Resource
    Kairomones and their use for management of entomophagous insects: III. Stimulation ofTrichogramma achaeae,T. pretiosum, andMicroplitis croceipes with host-seeking stimuli at time of release to improve their efficiency (1975)
    Springer
    Journal of chemical ecology 1 (1975), S. 431-438 
    Details
    ISSN: 1573-1561
    Keywords: kairomones ; Trichogramma achaeae ; Trichogramma pretiosum ; Microplitis croceipes ; Heliothis Spp. ; host-seeking stimuli ; insect behavior ; releasers ; pest management ; biological control
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology , Chemistry and Pharmacology
    Notes: Abstract Frass from larvae of the corn earworm,Heliothis zea (Boddie) and scales fromH. zea moths (that are known to contain the host-seeking stimulus, tricosane) stimulate and orient host-seeking activity in femaleMicroplitis croceipes (Cresson), a larval parasite ofH. zea, andTrichogramma spp., egg parasites ofH. zea. When larval frass, moth scales, and tricosane were used as sign stimuli (releasers) forM. croceipes, T. pretiosum (Riley), andT. achaeae Nagaraji and Nagarkatti, respectively, at time of their release from laboratory containers, parasite performance improved, resulting in significantly increased rates of parasitization over that of unstimulated parasites. Stimulation ofM. croceipes with larval frass had an overriding effect on this parasite's innate tendency to disperse upon release, thereby increasing the numbers remaining and prolonging their retention in the target area. Supplying the appropriate host-seeking stimuli to these 3 hymenopterous parasites ofH. zea at time of their release to improve their efficiency greatly increases the probability of their effective utilization in pest management systems.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00988584
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  • 8
    Electronic Resource
    Electronic Resource
    Reaktion von Epoxiden mit Phosphonsäuremonoestern und Phosphonsäuren (1975)
    New York, NY : Wiley-Blackwell
    Journal für Praktische Chemie/Chemiker-Zeitung 317 (1975), S. 798-806 
    Details
    ISSN: 0021-8383
    Keywords: Chemistry ; Organic Chemistry
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Notes: Phosphonsäuremonoalkylester bzw. Phosphonsäuren reagieren mit Epoxiden zu Phosphonsäure-alkyl-β-hydroxyalkyl- 5 bzw. -bis-β-hydroxyalkylestern 9 oder zu höhermolekularen Polyglykolestern. Durch intramolekulare Umesterung entstehen aus 5 bzw. 9 beim Destillieren unter Abspaltung von Alkohol bzw. Glykol cyclische Phosphonsäureester 6 bzw. 11.
    Additional Material: 3 Tab.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/prac.19753170513
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