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  • 1
    Electronic Resource
    Electronic Resource
    Laboratory studies on the effects of fungicides, acaricides and insecticides on the entomopathogenic fungus, Verticillium lecanii (1981)
    Springer
    Entomologia experimentalis et applicata 29 (1981), S. 39-48 
    Details
    ISSN: 1570-7458
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology
    Description / Table of Contents: Résumé Des tests sur agar ont suggéré que plusieurs fongicides, insecticides et acaracides pouvaient être recommandés pour une utilisation simultanée avec le champignon Verticillium lecanii (Zimm) Viégas; quelques substances chimiques — benodanil, oxycarboxine, iprodione, vinelozoline, dinocap, carbaryl, dicofol, dienochlor, pirimicarb, permethrine et huile blanche — sont en théorie suffisamment innoffensives contre V. lecanii pour être pulvérisées simultanément avec ses spores, tandis que des applications séparées devraient être préconisées pour le diflubenzuron qui est légèrement plus toxique. Les résultats d'essais sur agar, contre des aphides, avec quelques produits de toxicité plus élevée mais cependant moyenne, ont conduit à suggérer des applications séparées pour: bupirimate, pyrazaphos, triforine, cyhexatine, dioxathion et tetradifon, mais d'éviter toute utilisation de zineb. Les produits les plus toxiques sur agar ont été: thiram, captan, maneb, mancozeb, chlorothalonil, dichlofluanide, fenarimol, imazalil, BTS 40542, quinomethionate, fluotrimazole et diazinon. Après essais contre aphides, avec V. lecanii, captan, chlorothalonil, dichlofluanide, quinomethionate et thiram ont montré leur incompatibilité avec V. lecanii, tandis que fenarimol se montrait relativement sans nocivité. Sur la base des résultats de cette étude, une sélection soigneuse des pesticides et des fongicides devrait permettre l'utilisation combinée de V. lecanii et de produits chimiques dans des programmes de lutte intégrée.
    Notes: Abstract Tests on agar suggested that several fungicides, insecticides and acaricides could be recommended for use with the fungus, Verticillium lecanii (Zimm) Viégas; some chemicals, benodanil, oxycarboxin, iprodione, vinclozolin, dinocap, carbaryl, dicofol, dienochlor, pirimicarb, permethrin and white oil are in theory sufficiently innocuous to V. lecanii for spraying simultaneously with is spores while separate aphlications would be recommended for diflubenzuron which is slightly more toxic. Results of tests on aphids with some of the compounds of greater but intermediate toxicity on agar, suggested that separate applications are advisable with bupirimate, pyrazaphos, triforine, cyhexatin, dioxathion and tetradifon but any use of zineb is best avoided. The most toxic compounds on agar in this study were thiram, captan, maneb, mancozeb, chlorothalonil, dichlofluanid, fenarimol, imazalil, BTS 40542, quinomethionate, fluotrimazole and diazinon. Of these compounds tested with V. lecanii on aphids, captan, chlorothalonil, dichlofluanid, quinomethionate and thiram proved to be incompatible with V. lecanii but fenarimol proved relatively harmless. On the basis of the results of this study, careful selection of pesticides and fungicides would permit the combined use of V. lecanii and chemicals in integrated control programmes.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00300748
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  • 2
    Electronic Resource
    Electronic Resource
    Rat testes interstitial cell nuclei exhibit three distinct receptors for retinoic acid (1984)
    Springer
    Cellular and molecular life sciences 40 (1984), S. 276-277 
    Details
    ISSN: 1420-9071
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology , Medicine
    Notes: Summary Purified nuclei from rat testes interstitial cells were incubated with an equimolar complex of [3H]retinoic acid and purified cellular retinoic acid-binding protein (cRABP) and with ATP. Sodium dodecyl sulfate-polyacrylamide gel electrophoresis and radiofluorographic analysis of the nuclear fractions indicated the presence of 3 highly labeled receptors for retinoic acid which were distinct from cRABP. These data demonstrate that retinoic acid binds to 3 novel nuclear acceptors of which cRABP does not appear to be a part.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF01947580
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  • 3
    Electronic Resource
    Electronic Resource
    Control of aphids by the fungus, Verticillium lecanii: Effect of spore concentration (1980)
    Springer
    Entomologia experimentalis et applicata 27 (1980), S. 1-5 
    Details
    ISSN: 1570-7458
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology
    Description / Table of Contents: Résumé Dans des essais de laboratoire, la mortalité des pucerons augmente et est plus rapide quand la concentration en spores de Verticillium lecanii s'élève. Cependant, en serre, la possibilité de pulvériser le champignon sur les populations de pucerons sur chrysanthème a masqué rapidement les effets initiaux des différentes concentrations de spores. Ainsi des concentrations de spores différent de cent fois produisent des résultats aussi bons en serre, contre le puceron Myzus persicae.
    Notes: Abstract In laboratory bioassays, aphid mortality rose while killing time decreased with increasing spore concentrations of Verticillium lecanii. However, in the glasshouse, the ability of the fungus to be spread among aphid populations on chrysanthemums quickly masked the initial effects of spraying different spore concentration. Hundred-fold differences in spore concentrations produced equally good control of the aphid, Myzus persicae, in the glasshouse.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00377233
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  • 4
    Electronic Resource
    Electronic Resource
    Attempts to induce double resistance to drugs in the flagellate, Chilomonas paramecium (1962)
    Springer
    Archives of microbiology 42 (1962), S. 74-79 
    Details
    ISSN: 1432-072X
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology
    Notes: Summary Adaptation to two antipurines, 8-azaguanine and 6-mercaptopurine, has resulted in increased resistance to the inducing agent without modifying an original resistance to sulfanilamide in a strain of Chilomonas paramecium. In the case of isoniazid, a sulfonamide-resistant strain proved to be much more susceptible than the normal strain. Adaptation has reduced this susceptibility but, so far, has not brought sensitivity back to the level of the normal strain. However, this adaptation of a sulfonamide-resistant strain to isoniazid has not appreciably decreased the original resistance to sulfanilamide. The effects of 5-bromouracil and 2,6-diaminopurine were negligible and in each case “adaptation” caused no apparent change in a previous sulfonamide-resistance. Benzimidazole, although moderately inhibitory for all strains tested, also did not modify a preexisting sulfonamideresistance.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00425192
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  • 5
    Electronic Resource
    Electronic Resource
    Ultrastructure of the flagellar apparatus of the green algaTetraselmis subcordiformis (1981)
    Springer
    Protoplasma 107 (1981), S. 1-11 
    Details
    ISSN: 1615-6102
    Keywords: Flagellar apparatus ; Green algae ; Rhizoplast ; Rootlets
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology
    Notes: Summary The ultrastructure of the flagellar apparatus of the marine quadriflagellate green algaTetraselmis subcordiformis is described in detail. Special consideration is given to the functional significance of the contractile rhizoplast and also to a complex structure which anchors the flagellar apparatus to the cell membrane and theca. The flagellar apparatus lies at the base of a deep apical depression. Four basal bodies lie in a zigzag row with their long axes nearly parallel. Outer adjacent pairs of basal bodies are structurally linked by a Z-shaped, ribbon-like structure. A striated fiber (transfiber) connects each outer basal body with the inner basal body of the opposite, mirror image pair. A complex system of four laminated oval discs (rhizanchora), microtubule rootlets and fibrous material anchor the flagellar apparatus and rhizoplasts to the plasma membrane and theca. A 4-2-4-2 arrangement of microtubule rootlets is present. Rhizoplasts, which are contractile organelles, branch into five distinct arms and associate with the near outer basal body and each of the four rhizanchora. Rhizoplast contraction is thought to be linked to flagellar activity and may act to alter the direction of motion of the cell.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF01275602
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  • 6
    Electronic Resource
    Electronic Resource
    Thermodynamic functions of Americium metal (1980)
    Springer
    Journal of low temperature physics 41 (1980), S. 397-404 
    Details
    ISSN: 1573-7357
    Source: Springer Online Journal Archives 1860-2000
    Topics: Physics
    Notes: A critical analysis of the data for the specific heat from 15 K to 300 K of two samples of 241Am and one sample of 243Am leads to a set of “best” values. From these the thermodynamic functions are calculated, giving (C p)298 = 25.5 ± 1 J mol−1 K−1 and S 298 = 55.4 ± 2 J mol−1 K−1. The derived Debye characteristic temperature θD is estimated as 120 ± 20 K and the electronic specific heat coefficient γ as 1 ± 1 mJ mol−1 K−2.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00117948
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  • 7
    Electronic Resource
    Electronic Resource
    On some aspects of the natural occurrence of Chirocephalus diaphanus Prévost (1961)
    Springer
    Hydrobiologia 17 (1961), S. 205-217 
    Details
    ISSN: 1573-5117
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology
    Description / Table of Contents: Résumé 1. La présence de Chirocephalus diaphanus Prévost dans deux habitats d'un type légèrement different est décrite, basée sur des observations faites durant plusieurs années. 2. Dans les deux cas les données montrent la presénce irregulière et sporadique de cette espèce. 3. La quantité des générations qui se trouvent pendant un an est manifestement en relation avec la fréquence avec laquelle l'habitat se desséche, ou se trouve dans des conditions défavorables. Ordinairement une seconde génération ne chevauche pas la. première génération; elle ne se présente qu'après un intervalle de dessèchement. 4. Le schema de la présence naturelle est discuté en comparaison avec les investigations expérimentales, des conditions qui influencent le développementt et l'éclosion des oeufs. 5. On peut observer une succession des phénemènes où les oeufs viables peuvent rester sans écolose quand l'habitat se desséche et pouvant survivre la desiccation, enfin pouvant arriver à maturité dans une période très courte. 6. Les eflets probables de la congélation de l'habitat sont discutés.
    Notes: Summary 1. The occurrence of Chirocephalus diaphanus Prévost in two habitats of somewhat different character is described from observations extending over a number of years. 2. The records in both cases underline the sporadic and irregular occurrence of this species. 3. The number of generations occurring during the course of a year appears to be related to the frequency with which the habitat dries out or is subjected to other unfavourable conditions. In general a second generation does not overlap the first and only appears when the habitat becomes wet again. after an interval of drying out. 4. The pattern of natural occurrence is discussed in the light of experimental work on conditions affecting development and hatching of the eggs. 5. A sequence of events is suggested by which viable eggs are enabled to remain unhatched while the habitat dries out, to survive desiccation, and finally to complete development to maturity in a very short period. 6. The possible effects of freezing of the habitat are discussed.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00028994
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  • 8
    Electronic Resource
    Electronic Resource
    A method for determining the surface areas of various aquatic plants (1962)
    Springer
    Hydrobiologia 20 (1962), S. 173-178 
    Details
    ISSN: 1573-5117
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology
    Description / Table of Contents: Résumé 1. Le probléme d'obtenir un paramètre satisfaisant pour la comparaison des plantes aquatiques comme habitats pour les animaux petits est consideré. 2. On décrit une méthode pour déterminer l'area de la surface des plantes aquatiques.
    Notes: Summary 1. The problem of finding a suitable parameter for use in comparing aquatic plants as habitats for small animals is briefly considered. 2. A method is described for determining the surface area of aquatic plants.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00046315
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  • 9
    Electronic Resource
    Electronic Resource
    A method of rearing Simulium ornatum var. nitidifrons (Diptera, Simulidae) in the laboratory (1963)
    Springer
    Hydrobiologia 22 (1963), S. 197-201 
    Details
    ISSN: 1573-5117
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology
    Notes: Summary 1. An apparatus suitable for the rearing of Simuliid larvae is described. It allows for the continuous and rapid circulation and aeration of the water supply, and provides a range of current speeds suitable to larvae from fast flowing waters. 2. The results of rearing the larvae of Simulium ornatum var. nitidifrons are described. The greatest mortality occurred in the first larval instar. The time taken from hatching from the egg to emergence of the adult ranged from five to eight weeks at 17°C.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00039687
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  • 10
    Electronic Resource
    Electronic Resource
    Observation of an outburst from the X-ray pulsator 0115+63 (1981)
    Springer
    Space science reviews 30 (1981), S. 399-403 
    Details
    ISSN: 1572-9672
    Source: Springer Online Journal Archives 1860-2000
    Topics: Physics
    Notes: Abstract The Ariel 6 X-ray instruments observed 0115+63 during 1980 December 16–30, when the mean flux was ∼ 150 millicrab. Analysis of the ∼ 3.6s pulsations given a refined orbital period of 24.3155 ± 0.0002 days and a periastron angle of 47°. 15 ± 0°.13, setting a limit on the rate of advance of periastron since 1978 of 0.11 yr−1. During the observation the pulse period was decreasing faster than during the 1978 outburst, but in the 3 year interval there had been a spin down.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF01246054
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