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  • Protoplast fusion  (1)
  • biological control  (1)
  • critical parameters  (1)
  • Springer  (3)
  • American Association of Petroleum Geologists (AAPG)
  • Oxford University Press
  • Washington, DC : United States Gov. Print. Off.
Collection
Publisher
  • Springer  (3)
  • American Association of Petroleum Geologists (AAPG)
  • Oxford University Press
  • Washington, DC : United States Gov. Print. Off.
Years
  • 1
    Electronic Resource
    Electronic Resource
    Springer
    Current genetics 4 (1981), S. 165-166 
    ISSN: 1432-0983
    Keywords: Protoplast fusion ; Parasexual hybrids ; Electric field pulse
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology
    Notes: Summary Under the action of a high electric field pulse a pronounced stimulation of yeast protoplast fusion initiated by polyethylene glycol and Ca 2+ ions was found. The fusion rate was enhanced by a factor of 200 for different genetically marked strains of the yeast Saccharomyces cerevisiae as compared with fusion without electric field treatment. Genetic evidence for fusion has been obtained by isolating parasexually produced hybrids resulting from combination of the genomes of both mutants. Our method allows the production of a large number of parasexual hybrids for different purposes.
    Type of Medium: Electronic Resource
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  • 2
    Electronic Resource
    Electronic Resource
    Springer
    International journal of thermophysics 13 (1992), S. 1043-1052 
    ISSN: 1572-9567
    Keywords: carbon dioxide ; critical parameters ; critical phenomena ; ethane ; plait point
    Source: Springer Online Journal Archives 1860-2000
    Topics: Physics
    Notes: Abstract This paper deals with an evaluation of the critical parameters reported for mixtures of carbon dioxide and ethane. Equations are presented for the critical parameters as a function of the concentration.
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  • 3
    ISSN: 1573-8248
    Keywords: rice ; predation ; biological control ; predator effectiveness ; riz ; prédation ; lutte biologique ; efficacité prédatrice
    Source: Springer Online Journal Archives 1860-2000
    Topics: Agriculture, Forestry, Horticulture, Fishery, Domestic Science, Nutrition
    Description / Table of Contents: Résumé Huit insectes prédateurs communs dans l'écosystème du riz aux Philippines ont été comparés au laboratoire pour leur capacité à se nourrir sur les œufs de la chenilleRivula atimeta Swinhoe. Une échelle basée sur les taux de prédation a été établie:Metioche vittaticollis (Stal) (Gryllidae) était le prédateur le plus vorace suivi parAnaxipha longipennis (Serville)(Gryllidae), Ophionea nigrofasciata (Schmidt-Goebel)(Carabidae), Micraspis nr.crocea (Mulsant) (Coccinellidae) etConocephalus longipennis (de Haan) (Tettigonidae). Le petit Miride,Cyrtorhinus lividipennis, se nourrissait aussi facilement sur les œufs.Paederus fuscipes (Curtis) (Staphilinidae) etCoccinella repanda (Thunberg) (Coccinellidae) se nourrissait dans une mesure très limitée.Metioche vittaticollis etCyrtorhinus lividipennis ont été aussi testés vis-à-vis des œufs de la NoctuelleNaranga aenescens Moore et de la Mineuse du Riz,Hydrellia philippina Ferino. Le taux de prédation deM. vitaticollis était identique sur les trois proies, maisC. lividipennis manifestait un taux de prédation plus élevé sur les œufs deN. aenescens. Dans les cages de plein air, de 1,6 m2, on permettait à différentes densités deM. vittaticollis et d'O. nigrofasciata de se nourrir sur des œufs deR. atimeta exposés durant deux jours.Metioche vittaticollis consommait 13 et 26 œufs aux densités respectives de 1 et 2 prédateurs par cage, mais la prédation n'était pas beaucoup plus élevée à la densité de 8. La prédation due àO. nigrofasciata n'était pas significative.
    Notes: Abstract Eight insect predators common in the rice ecosystem in the Philippines were compared in the laboratory on their ability as to feed on the eggs of green hairy caterpillar,Rivula atimeta Swinhoe. A ranking, based on feeding rates was made:Metioche vittaticollis (Stål) (Gryllidae) was the most voracious predator, followed byAnaxipha longipennis (Serville)(Gryllidae), Ophionea nigrofasciata (Schmidt-Goebel)(Carabidae), Micraspis nr.crocea (Mulsant) (Coccinellidae) andConocephalus longipennis (de Haan) (Tettigoniidae). Also the smallCyrtorhinus lividipennis Reuter (Miridae), readily fed upon the eggs.Paederus fuscipes Curtis (Staphilinidae) andCoccinella repanda (Thunberg) (Coccinellidae) fed to a very limited extent.Metioche vittaticollis andCyrtorhinus lividipennis were also tested on eggs of green semilooper,Naranga aenescens Moore, and rice whorl maggot,Hydrellia philippina Ferino. The feeding rate ofM. vittaticollis was similar on the 3 different preys, butC. lividipennis had a higher feeding rate onN. aenescens eggs. In 1.6 m2 field cages, different densities ofM. vittaticollis andO. nigrofasciata were allowed to feed on exposedR. atimeta eggs during 2 days.Metioche vittaticollis consumed 13 and 26 eggs at predator densities of 1 and 2 per cage respectively, but was not much higher at density 8. Predation byO. nigrofasciata was not significant.
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