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  • 1
    Electronic Resource
    Electronic Resource
    Springer
    Biology and fertility of soils 4 (1987), S. 15-19 
    ISSN: 1432-0789
    Keywords: Nitrogen fixation ; N-balance studies ; Azolla ; Blue-green algae ; Chemical N fertilization ; Rice
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology , Geosciences , Agriculture, Forestry, Horticulture, Fishery, Domestic Science, Nutrition
    Notes: Summary A nitrogen balance study conducted in ceramic pots under net house conditions for four seasons showed that flooded rice soil leaves a positive nitrogen balance (N increase) in soil after rice cropping in both fertilized and unfertilized soil. Recovery of nitrogen from rice soil was more than its input in unfertilized soil, but it was reverse in fertilized soil. Incorporation of Azolla or BGA twice as basal and 20 days after transplanting (DAT) alone or in combination showed higher nitrogen balance and N2-fixation (N gain) in soil than in that where it was applied once either as basal or 20 DAT. Planted soil showed more N2-fixation than that of fallow rice, and flooded soil fixed more nitrogen in comparison to non-flooded soil in light but less in dark. Soil exposed to light fixed more nitrogen than that of unexposed soil in both flooded and non-flooded conditions.
    Type of Medium: Electronic Resource
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  • 2
    Electronic Resource
    Electronic Resource
    [S.l.] : American Institute of Physics (AIP)
    Journal of Applied Physics 61 (1987), S. 4379-4381 
    ISSN: 1089-7550
    Source: AIP Digital Archive
    Topics: Physics
    Notes: The voltage dependence of dc resistance of polycrystalline GdtY3−tFe5O12 (t=1.0, 1.1, 1.6, and 2.2) is experimentally studied at different temperatures. The data is explained on the basis of Krausse's theory. It is found that gadolinium substitution in YIG does not affect the grain-boundary potential barrier height (φ0). The temperature, however, affects φ0. The parameter z, in Krausse's model, which is found to be temperature independent, increases with the increase in the gadolinium substitution in YIG.
    Type of Medium: Electronic Resource
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  • 3
    Electronic Resource
    Electronic Resource
    Oxford, UK : Blackwell Publishing Ltd
    Annals of the New York Academy of Sciences 510 (1987), S. 0 
    ISSN: 1749-6632
    Source: Blackwell Publishing Journal Backfiles 1879-2005
    Topics: Natural Sciences in General
    Type of Medium: Electronic Resource
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  • 4
    Electronic Resource
    Electronic Resource
    Springer
    Journal of materials science 6 (1987), S. 621-623 
    ISSN: 1573-4811
    Source: Springer Online Journal Archives 1860-2000
    Topics: Mechanical Engineering, Materials Science, Production Engineering, Mining and Metallurgy, Traffic Engineering, Precision Mechanics
    Type of Medium: Electronic Resource
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  • 5
    Electronic Resource
    Electronic Resource
    Oxford [u.a.] : International Union of Crystallography (IUCr)
    Acta crystallographica 43 (1987), S. 106-109 
    ISSN: 1600-5759
    Source: Crystallography Journals Online : IUCR Backfile Archive 1948-2001
    Topics: Chemistry and Pharmacology , Geosciences , Physics
    Type of Medium: Electronic Resource
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  • 6
    ISSN: 1573-8248
    Keywords: Trichogramma brasiliensis ; cypermethrin ; endosulfan ; fenitrothion ; monocrotophos ; permethrin ; phenthoate ; phosalone ; quinalphos ; Trichogramma brasiliensis Ashmead ; cyperméthrine ; endosulfan ; fenitrothion ; fenvelarate ; monocrotophos ; perméthrine ; phenthoate ; phosalone ; quinalphos
    Source: Springer Online Journal Archives 1860-2000
    Topics: Agriculture, Forestry, Horticulture, Fishery, Domestic Science, Nutrition
    Description / Table of Contents: Résumé L'effet de 9 insecticides recommandés dans la lutte contre les vers de la capsule du cotonnier a été étudié en laboratoire sur l'émergence deTrichogramma brasiliensis Ashmead des œufs parasités deCorcyra cephalonica d'âges variés. Les concentrations testées étaient identiques à celles préconisées dans la pratique (phenthoate 0.14%, phosalone 0,15%, endosulfan 0,25%, perméthrine 0,014% monocrotophos 0,13%, fenvalerate 0,014%, cypermethrine 0,014%, fenitrothion 0,30% et quinalphos 0,14%. Le quinalphos et le fenitrothion inhibaient totalement l'émergence du parasitoïde quel que soit l'âge des œufs hôtes parasités. Mais en général l'action des insecticides sur l'émergence décroissait avec le vieillissement des œufs parasités. Pour des œufs hôtes parasités âgés d'un jour, le pourcentage d'émergence deT. brasiliensis varie de 33 à 57 p. 100 pour les 7 produits restants. Pour des œufs-hôtes parasités âgés de 7 jours, il n'y a pas de différence entre les témoins et ceux traités par l'endosulfan, la phosalone et le phenthoate. Cependant, 46 à 59 p. 100 des œufs traités par la perméthrine, le monocrotophos et la cyperméthrine ne donnent lieu à aucune émergence. Le traitement au fenvalerate supprime aussi d'une manière significative l'émergence, mais comparativement à un niveau plus bas (40 p. 100). Des 9 insecticides essayés, la phosalone et le fenvalerate ont été considérés comme relativement sans effet vis-à-vis deT. brasiliensis.
    Notes: Abstract The effect of 9 insecticides recommended for the control of cotton bollworms was studied, under laboratory conditions, on the emergence ofTrichogramma brasiliensis Ashmead from the parasitized eggs ofCorcyra cephalonica (Stainton) of different age groups. The insecticide concentrations tested were equivalent to those recommended for field application viz. phenthoate 0.14%, phosalone 0.15%, endosulfan 0.25%, permethrin 0.014%, monocrotophos 0.13%, fenvalerate 0.014%, cypermethrin 0.014%, fenitrothion 0.30% and quinalphos 0.14%, quinalphos and fenitrothion caused complete inhibition of emergence of the parasitoid from parasitized host eggs of all ages (1 to 7 days); but in general, adverse effect of insecticides on the disruption of emergence decreased with the advancement in the age of the parasitized eggs. For 1 day old parasitized host eggs, emergence ofT. brasiliensis adults varied from 33 to 57% for the remaining 7 treatments. For the 7 days old parasitized host eggs, emergence of parasitoids from the treatments with endosulfan, phosalone and phenthoate was similar to that from control. However, 46 to 59% inhibition of emergence was observed for permethrin, monocrotophos and cypermethrin. Fenvalerate treatment also significantly inhibited the emergence but at a comparatively lower level (40%). Out of 9 insecticides tested, phosalone and fenvalerate were considered to be relatively safe toT. brasiliensis.
    Type of Medium: Electronic Resource
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  • 7
    Electronic Resource
    Electronic Resource
    Springer
    Urological research 15 (1987), S. 105-108 
    ISSN: 1434-0879
    Keywords: Sodium ; Inhibitory activity ; Oxalates ; Phosphates ; Calcium ; Calculi
    Source: Springer Online Journal Archives 1860-2000
    Topics: Medicine
    Notes: Summary the effect of changes in urinary sodium, induced by dietary manipulation in normal subjects (NS) and in stone formers (SF) was studied by observing crytalluria qualitatively and by determining calcium, oxalate and phosphate crystallization quantitatively in an experimental model. In SF the calcium crystallization was significantly higher than in NS at all the three levels of urinary sodium studied. However, no difference was observed in oxalate and phosphate crystallization rates between these two groups. Calcium and oxalate (p〈 0.05) and oxalate and phosphate (p〈 0.001) were found to be correlated in NS but were non-significant in SF. The wide changes in the urinary sodium induced by dietary changes did not influence the crystallization rate of calcium, nor of oxalate and phosphate in NS as well as in SF. The results suggested that a sodium intake with lower and upper limits of 124 mg and 6,009 mg respectively did not act as “inhibitor” of crystallization rate nor did it induce hypercalciuria severe enough to pose a “risk” of stone formation. The results did not suggest that a high urinary sodium increases the solubility of calcium phosphate.
    Type of Medium: Electronic Resource
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  • 8
    ISSN: 1434-601X
    Keywords: 90,92,94,96Zr (α, α′) ; E=35.4 MeV ; measuredσ(Θ) of 2+ and 3− states ; deduced electromagnetic and isoscalar transition rates,M n /M p ratios ; 23.20.Js ; 25.55.Ci
    Source: Springer Online Journal Archives 1860-2000
    Topics: Physics
    Notes: Abstract Coulomb-nuclear interference in inelastic scattering of 35.4 MeVα-particles from the stable even Zr isotopes was studied. In the framework of a collective DWBA analysis isoscalar and electromagnetic transition rates for low lying 2+ and 3− states were derived. The experimentalB (E2) values are in good agreement with results obtained by purely electromagnetic methods. The deducedM n /M p ratios of the 2 1 + levels exhibit a surprisingly large increase with increasing neutron number.
    Type of Medium: Electronic Resource
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  • 9
    Electronic Resource
    Electronic Resource
    Springer
    Plant and soil 102 (1987), S. 49-54 
    ISSN: 1573-5036
    Keywords: Azolla pinnata ; Azolla dual cropping ; N ; P uptake ; rice ; soil fertility
    Source: Springer Online Journal Archives 1860-2000
    Topics: Agriculture, Forestry, Horticulture, Fishery, Domestic Science, Nutrition
    Notes: Abstract Azolla and urea application in a rice field transplanted with square (20 cm×20 cm) and rectangular (10 cm×40 cm) spacings for three consecutive seasons were found to increase significantly uptake of N and P by the rice plants, irrespective of seasons. Azolla treatments increased the organic C content of the soil during both wet and dry seasons, while its N and P contents were more only during the wet seasons. Urea did not affect N, P and organic C contents of the soil. Spacing had no significant effect on N and P uptake by the rice plant or N, P and C contents of the soil. Maximum N and P uptake in rice were obtained by growing two crops of Azolla after transplanting in addition to its incorporation before transplanting. This treatment showed significantly more N uptake than the urea at 60 kg N ha−1 during wet and dry seasons of 1982. Among Azolla treatments, twice Azolla dual cropping although showed comparatively lower uptake of N and P, it was comparable to that of 60 kg N ha−1 urea.
    Type of Medium: Electronic Resource
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  • 10
    Electronic Resource
    Electronic Resource
    Springer
    Plant and soil 102 (1987), S. 41-47 
    ISSN: 1573-5036
    Keywords: Azolla pinnata ; dual cropping ; N2-fixation ; spacing ; rice yield
    Source: Springer Online Journal Archives 1860-2000
    Topics: Agriculture, Forestry, Horticulture, Fishery, Domestic Science, Nutrition
    Notes: Abstract A field experiment conducted at Central Rice Research Institute, Cuttack, during three successive seasons showed that with the 120-day-duration variety Ratna two dual crops ofAzolla pinnata R. Brown (Bangkok isolate) could be achieved 25 and 50 days after transplanting (DAT) by inoculating 2.0 t ha−1 of fresh Azolla 10 and 30 DAT respectively. One basal crop of Azolla could also be grown using the same inoculum 20 days before transplanting (DBT) in fallow rice fields. The three crops of Azolla grown—once before transplanting and twice after transplanting—gave an average total biomass of 38–63 and 43–64 t ha−1 fresh Azolla containing 64–90 and 76–94 kg N ha−1 respectively in the square and rectangular spacings. Two crops of Azolla grown only as a dual crop, on the other hand, gave 26–39 and 29–41 t ha−1 fresh Azolla which contained 44–61 and 43–59 kg N ha−1 respectively. Growth and yield of rice were significantly higher in Azolla basal plus Azolla dual twice incorporated treatments than in the Azolla dual twice incorporation, Azolla basal plus 30 kg N ha−1 urea and 60 kg N ha−1 urea treatments. Azolla basal plus 30 kg N ha−1 urea and 60 kg N ha−1 urea showed similar yields but Azolla dual twice incorporation was significantly lower than those. The different spacing with same plant populations did not affect growth and yield significantly, whereas Azolla growth during dual cropping was 8.3 and 64% more in the rectangular spacing than in the square spacing in Azolla basal plus Azolla dual twice incorporation and Azolla dual twice incorporation treatments.
    Type of Medium: Electronic Resource
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