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  • Springer  (26)
  • Wiley  (14)
  • American Institute of Physics  (8)
  • Blackwell Publishing Ltd  (4)
  • 1975-1979  (52)
  • 1
    Electronic Resource
    Electronic Resource
    Adsorption and bioactivity of di-allate, tri-allate and trifluralin (1979)
    Oxford, UK : Blackwell Publishing Ltd
    Weed research 19 (1979), S. 0 
    Details
    ISSN: 1365-3180
    Source: Blackwell Publishing Journal Backfiles 1879-2005
    Topics: Agriculture, Forestry, Horticulture, Fishery, Domestic Science, Nutrition
    Notes: Studies were conducled to cstmiate the adsorption parameter k and the bioactivity (in terms of G R50) of di-allate [S-2,3-dichloroallyl N, N-di-isopropyl (thiocar bamate)], iri-allate [S-2,3,3-trichloroallyl N, N -di-isopropyl (thiocar bamate], and [trifiuralin (2,6-dinitro N, N-dlpropyl-4-trifluoromelhylaniline) in a number of Saskatchewan soil. The k values ratiged from 5 for di-allate adsorption m Asquilh loamy sand to 315 for trifluralin adsorption on Melfort loam and were closely related to the soil organic matter content. The relative degree of adsorption was irifluralin 〉 tri-allate 〉di-allaie. For each herbicide, the G R50 values were positively correlated wich organic matter conienl atid wilh k. It was suggested that these nonionic herbicides may be amenable to a predictive approach for field application rates in different soils. Among herbicides for any one soil, however, there was not the same relationship between G R50andk. since the G R50 was least for trifluralin and there was no significant difference between di-allate and tri-allate.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1111/j.1365-3180.1979.tb01552.x
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  • 2
    Electronic Resource
    Electronic Resource
    Nitrogen Metabolism of the Upper Three Leaf Blades of Wheat at Different Soil Nitrogen Levels (1978)
    Oxford, UK : Blackwell Publishing Ltd
    Physiologia plantarum 42 (1978), S. 0 
    Details
    ISSN: 1399-3054
    Source: Blackwell Publishing Journal Backfiles 1879-2005
    Topics: Biology
    Notes: Some aspects of nitrogen metabolism, during grain development, of the upper three leaf blades on the mainshoot of wheat (Triticum aestivum L.) cv. Pusa Lerma, grown under three soil nitrogen levels (0, 30 and 120 kg ha-1), were investigated. It was observed that these leaf blades were active in NO-3 assimilation. Of the leaf blades, the flag lead blade had significantly higher nitrate reductase activity, higher amount of free amino acid and soluble protein content, whereas the content of NO-3 was significantly lower than in the other two leaf blades. Application of soil nitrogen significantly enhanced the nitrate reductase activity (N30 over N0 and N120 over N30), free amino acid (N30 over N0 and N120 over N30), soluble protein (N120 over N0) and NO-3 content (N30 and N120 over N0) in all three leaf blades. During the 35-day period, viz. from 7 days prior to anthesis to 28 days after anthesis, the three leaf blades together reduced 280, 608 and 1397 NO-3μmol under N0, N30 and N120, respectively.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1111/j.1399-3054.1978.tb04084.x
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  • 3
    Electronic Resource
    Electronic Resource
    Nitrogen Metabolism of the Upper Three Leaf Blades of Wheat at Different Soil Nitrogen Levels (1978)
    Oxford, UK : Blackwell Publishing Ltd
    Physiologia plantarum 42 (1978), S. 0 
    Details
    ISSN: 1399-3054
    Source: Blackwell Publishing Journal Backfiles 1879-2005
    Topics: Biology
    Notes: Upper three leaf blades on the mainshoot of wheat cultivar, cv. Pusa Lerma, grown under three soil nitrogen levels (0, 30 and 120 kg ha-1), were examined for changes in total reduced nitrogen and protease activity at pH 4.0 and 7.0. No net loss of reduced nitrogen takes place prior to and around anthesis. The protease activity is low during this period. At later stages there is rise in the loss of nitrogen which is paralleled by enhancement in protease activity. From amongst the leaf blades, nitrogen concentration is significantly high in the flag and penultimate as compared to the values in the third leaf blade. There were significant differences in protease activity (pH 4.0) amongst the leaf blades. At pH 7.0, however, the differences between the flag and penultimate leaf blades were not significant. Highest enzyme activity was in the flag followed by penultimate and then third leaf blade. Soil N application significantly enhanced the nitrogen content of all the leaf blades. At pH 4.0, the protease activity (g fr. wt.-1) increased significantly due to soil N application (N30 over N0). There was, however, decline in the enzyme activity at pH 7.0, though the differences at different soil N levels were not significant. Analysis in terms of μmol N (reduced form) accumulated in the grains (ear)-1 revealed that two-thirds of N is translocated by 28-day stage and the rest between 28-day and final harvest. The three leaf blades together contributed 22.7, 32.6 and 48.5% of the grain N (ear)-1 at N0, N30 and N120- respectively. Most of the nitrogen applied to the soil is reduced by these leaf blades.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1111/j.1399-3054.1978.tb04085.x
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  • 4
    Electronic Resource
    Electronic Resource
    CHEMOIMMUNOTHERAPY OF SYNGENEIC MOUSE MAMMARY CARCINOMAS EMPLOYING METHANOL EXTRACTION RESIDUE (1976)
    Oxford, UK : Blackwell Publishing Ltd
    Annals of the New York Academy of Sciences 277 (1976), S. 0 
    Details
    ISSN: 1749-6632
    Source: Blackwell Publishing Journal Backfiles 1879-2005
    Topics: Natural Sciences in General
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1111/j.1749-6632.1976.tb41698.x
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  • 5
    Electronic Resource
    Electronic Resource
    Reduction of bovine pulmonary hypertension by normoxia, verapamil and hexaprenaline (1977)
    Springer
    Cellular and molecular life sciences 33 (1977), S. 1192-1194 
    Details
    ISSN: 1420-9071
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology , Medicine
    Notes: Summary In calves with hypoxic pulmonary hypertension, resistance was reduced by 40±3% with normoxia, 19±4% with verapamil, and 60±1% with hexoprenaline. It is possible that the increased resistance during normoxia is due partly to vasoconstriction rather than solely to vascular thickening, and that the vasoconstriction is due to an abnormality in calcium metabolism by the hypertensive vasculature.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF01922322
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  • 6
    Electronic Resource
    Electronic Resource
    Field experiments on the competitiveness of males carrying genetic control systems forAedes aegypti (1976)
    Springer
    Entomologia experimentalis et applicata 20 (1976), S. 8-18 
    Details
    ISSN: 1570-7458
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology
    Description / Table of Contents: Zusammenfassung Es wurde die Konkurrenzkraft vonAedes aegypti — Männchen ermittelt nach Anwendung von drei genetischen Verfahren, nämlich Chemosterilisation der Männchen, heterozygote doppelte Translokation (T1T3) und gestörte doppelte heterozygote Translokation (DT1T3) der Männchen, die in eine natürliche Population des hauptstädtischen Gebiets von Delhi freigelassen wurden; dabei wurde eine auf dem Prinzip des Freilassens und Wiederfangs von markierten Weibchen beruhende Methode verwendet. Chemosterilisierte und DT1T3 — Männchen zeigten annähernd normale Konkurrenzkraft, was den Ergebnissen von Labor- und Freilandkäfigversuchen entspricht. Die T1T3-Männchen zeigten verminderte Konkurrenzkraft im Feld und in Laborkäfigtests, im Gegensatz zu früher berichteten Befunden mit nicht-markierten T1T3-Männchen in Feldkäfigen. Die Ursache dieser Reduktion der Konkurrenzkraft war nicht klar.
    Notes: Abstract The competitiveness carrying males of three genetic control systems forAedes aegypti (L.), viz. chemosterilized males, double translocation heterozygote males (T1T3) and distorter double translocation heterozygote males (DT1T3), released into a natural population in the Delhi metropolitanxarea was evaluated using a method based on the principle of release and recapture of marked females. Chemosterilized males and DT1T3 males showed approximately normal competitiveness in the field which is similar to the results obtained from laboratory and field cage experiments. The T1T3 males were found to have reduced competitiveness both in the field and laboratory cage tests, in contrast to previously reported results with unmarked T1T3 males in field cages. The cause of this reduction in competitiveness was not clear.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF01884747
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  • 7
    Electronic Resource
    Electronic Resource
    Relative phytotoxicity of some picloram derivatives (1975)
    Springer
    Bulletin of environmental contamination and toxicology 14 (1975), S. 721-725 
    Details
    ISSN: 1432-0800
    Source: Springer Online Journal Archives 1860-2000
    Topics: Energy, Environment Protection, Nuclear Power Engineering , Medicine
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF01685248
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  • 8
    Electronic Resource
    Electronic Resource
    Computer-aided determination of annihilation and momentum transfer rates of slow positrons from argon gas atoms (1979)
    Springer
    Applied physics 18 (1979), S. 109-111 
    Details
    ISSN: 1432-0630
    Keywords: 34.70.-d
    Source: Springer Online Journal Archives 1860-2000
    Topics: Mechanical Engineering, Materials Science, Production Engineering, Mining and Metallurgy, Traffic Engineering, Precision Mechanics , Physics
    Notes: Abstract Annihilation and momentum transfer rates of slow positrons in argon gas have been determined by an iterative computer-based analysis. Agreement of calculated positron annihilation decay constant with experimental measurements at various electric and temperature fields is very good.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00935912
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  • 9
    Electronic Resource
    Electronic Resource
    A numerical determination of the effect of electric fields and charges on the efficiency with which cloud drops and small raindrops collide with aerosol particles (1976)
    Springer
    Pure and applied geophysics 114 (1976), S. 509-520 
    Details
    ISSN: 1420-9136
    Source: Springer Online Journal Archives 1860-2000
    Topics: Geosciences , Physics
    Notes: Summary Numerical calculations were carried out to determine the effect of a vertical electric field on the efficiency with which electrically charged or uncharged cloud drops and small raindrops of diameters ranging from 84 μm to 1.248 mm collide with electrically charged or uncharged particles of density 2 gm/cm3 and diameters between 1 and 20 μm. For this purpose, numerical flow fields about spheres of Reynolds numbers ranging from 1 to 400 were used to integrate the trajectory of the particle relative to the drop, and the force between two conducting spheres was used to represent the electrostatic force on the particle. The effect of thunderstorm strength electric charges and field on the collision efficiency was found to be highly significant for the smaller collector drops, and declined to insignificance for the largest collector drop.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00875647
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  • 10
    Electronic Resource
    Electronic Resource
    The electrostatic force between a charged conducting sphere and a charged dielectric sphere in an arbitrarily oriented external electric field (1976)
    Springer
    Pure and applied geophysics 114 (1976), S. 521-539 
    Details
    ISSN: 1420-9136
    Source: Springer Online Journal Archives 1860-2000
    Topics: Geosciences , Physics
    Notes: Summary The electrostatic force between a charged conducting sphere and a charged dielectric sphere in a uniform, arbitrarily oriented external electric field is obtained and presented in terms of force coefficients which depend only on the relative geometry of the two spheres and the dielectric constants of the dielectric sphere and the medium. When the dielectric constant of the dielectric sphere is allowed to approach infinity, the resulting computed force agrees with that ofDavis (1964) for two conducting spheres, and when the external field and the charge on the dielectric sphere are set to zero, the resulting force agrees with that ofHall andBeard (1975) for a charged conducting sphere near an uncharged dielectric sphere.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00875648
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