ALBERT

All Library Books, journals and Electronic Records Telegrafenberg

X
feed icon rss

Your email was sent successfully. Check your inbox.

An error occurred while sending the email. Please try again.

Proceed reservation?

Export
  • 1
    Electronic Resource
    Electronic Resource
    Charge dynamics of a methane adsorption storage system: Intraparticle diffusional effects (1996)
    Springer
    Adsorption 3 (1996), S. 117-125 
    Details
    ISSN: 1572-8757
    Keywords: methane adsorption ; on-board storage ; mathematical modeling ; numerical simulation
    Source: Springer Online Journal Archives 1860-2000
    Topics: Chemistry and Pharmacology , Physics , Process Engineering, Biotechnology, Nutrition Technology
    Notes: Abstract The charge of natural gas adsorption storage systems is studied numerically, With emphasis given to the impact on its dynamics of intraparticle diffusional resistances to mass transport. Besides adsorption kinetics and thermal effects, the simulation model takes into account both mass transport inside the adsorbent and hydrodynamics of flow through the packed bed. Numerical results are presented for change with methane of a 50 liter cylindrical reservoir, filled with hypothetical adsorbents with diffusional time constants in the range 10−3 s1 D/R p 2 ≤ ∞. and with the adsorption equilibrium curve of a commercially available activated carbon with a good adsorptive storage capacity. An attempt is made to assemble the charge histories for different values ofD/R p 2 , in a single cure by using a modilied time scale.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF01650235
    Location Call Number Expected Availability
    BibTip Others were also interested in ...
    Paper (German National Licenses)
    Fulltext
  • 2
    Electronic Resource
    Electronic Resource
    Effects of dietary nicotine and partial starvation of tobacco hornworm,Manduca sexta, on the survival and development of the parasitoidCotesia congregata (1992)
    Springer
    Entomologia experimentalis et applicata 65 (1992), S. 241-245 
    Details
    ISSN: 1570-7458
    Keywords: Allelochemicals ; partial starvation ; tri trophic interactions
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology
    Notes: Abstract A factorial experiment tested the effects of dietary nicotine and of partial starvation of fifth instar tobacco hornworm,Manduca sexta (L.) (Lepidoptera: Sphingidae), on the survival and development of the parasitoidCotesia congregata (Say) (Hymenoptera: Braconidae) in the laboratory. More parasitoids failed to emerge from partially starved hosts when reared on 0.1% nicotine diet, than from partially starved hosts fed control diet. Parasitoids reared from hornworms starved by 75% on nicotine diet had the longest development. The number of wasps was reduced when reared from hosts that were fed less than 50% of their daily consumption on nicotine diet. Pupal mortality was increased by dietary nicotine. Nicotine, within the host tissues, may be directly toxic to the parasitoids before their emergence from hornworms. Our data suggest that nicotine may act by mediating the availability of nutrients or reduce assimilation of nutrients by developing parasitoids.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF02343857
    Location Call Number Expected Availability
    BibTip Others were also interested in ...
    Paper (German National Licenses)
    Fulltext
  • 3
    Electronic Resource
    Electronic Resource
    Effects of postemergence experience on searching and landing responses of the insect parasitoid,Cotesia congregata (Say) (Hymenoptera: Braconidae), to plants (1992)
    Springer
    Journal of insect behavior 5 (1992), S. 301-320 
    Details
    ISSN: 1572-8889
    Keywords: postemergence learning ; cross-induction ; foraging behavior ; Cotesia congregata (Say) ; Braconidae ; Hymenoptera
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology
    Notes: Abstract Postemergence experience with one of six plant species, in the presence of the host larva, modified the searching response of reproductively mature females of Cotesia congregata(Say) to these plants in at least one of three ways: (1) an increased response to the plant experienced at emergence, (2) an increased response to other plants, or (3) an inhibited response to other plants. Landing and searching responses were differentially affected by postemergence experience. For example, postemergence experience with tobacco (a common plant) in the presence of the host larva induced a landing preference for this plant over parsley (a novel plant) but did not affect searching responses to either plant, whereas experience with parsley and the host larva induced an increased searching response to parsley but a landing preference for tobacco. Differential effects of postemergence experience may reflect the type of stimuli involved in searching or landing and may have adaptive significance.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF01049840
    Location Call Number Expected Availability
    BibTip Others were also interested in ...
    Paper (German National Licenses)
    Fulltext
  • 4
    Electronic Resource
    Electronic Resource
    Postemergence learning in the insect parasitoid,Cotesia congregata (Say) (Hymenoptera: Braconidae) (1991)
    Springer
    Journal of insect behavior 4 (1991), S. 727-742 
    Details
    ISSN: 1572-8889
    Keywords: postemergence learning ; early-adult experience ; Cotesia congregata (Say) ; Braconidae ; Hymenoptera
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology
    Notes: Abstract Exposing newly emerged females of Cotesia congregata(Say) to wild cherry, an inherently unattractive plant, and their host larvae at 0–4 h after adult emergence induced a positive searching response to wild cherry and an inhibited response to cabbage, an attractive plant. Inherent responses were not affected when females were exposed to their hosts at 0–12 h and to cherry at 8–12 h after emergence. The induced response to cherry was constant until its disappearance at 6–7 days;inhibition of the response to cabbage was released at 4–5 days after emergence. Postemergence exposure to cherry and parasitoid cocoons induced similar but weaker searching responses. Induced searching responses exhibit features of associative learning and receptor modification. In addition to its presumed role in foraging, postemergence experience with plants may encourage assortative mating of C. congregatawithin suitable host habitats and, thus, facilitate local adaptations to specific plants.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF01052227
    Location Call Number Expected Availability
    BibTip Others were also interested in ...
    Paper (German National Licenses)
    Fulltext
  • 5
    Electronic Resource
    Electronic Resource
    Some effects of overcrowding on the respiration of larval Aedes aegypti (1973)
    Springer
    Entomologia experimentalis et applicata 16 (1973), S. 146-156 
    Details
    ISSN: 1570-7458
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology
    Description / Table of Contents: Résumé Le but de cette étude est d'étudier les modifications de l'activité respiratoire chez des larves du 4ème stade mises respectivement en condition d'élevage “standard”, en condition de surpeuplement, et en condition de restriction alimentaire. Les conditions de surpeuplement et de restriction alimentaire entrainent un abaissement significatif du niveau du métabolisme respiratoire. L'activité respiratoire des larves élevées en condition standard, prend des valeurs plus élevées quand la mesure est faite sur un plus grand nombre de larves rassemblées dans le tube-test; par contre les conditions de mesure (15, 25 ou 35 larves dans le tube-test) ne modifient pas la valeur de l'activité respiratoire des larves élevées en condition de surpeuplement. Quand des larves élevées en milieu surpeuplé et en milieu standard sont soumises à de fortes concentrations des facteurs retardant la croissance (Growth-retardant factors; GRF de Moore & Fisher 1969) l'activité respiratoire est stimulée. Dans les conditions de surpeuplement et de restriction alimentaire, deux types facteurs pourraient agir sur le métabolisme respiratoire, des facteurs chimiques et des facteurs mécaniques tels que l'agitation des individus dans un espace étroit (par exemple le tube-test).
    Notes: Abstract Changes in the respiratory rates of “standard”, overcrowded, and starved fourth-instar Aedes aegypti are compared. The respiratory effects of varying larval densities during and prior to measurement are investigated. In addition, the results of exposure of standard and over-crowded larvae to growth-retarding factors (GRF) at various concentrations are also evaluated.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00290687
    Location Call Number Expected Availability
    BibTip Others were also interested in ...
    Paper (German National Licenses)
    Fulltext
  • 6
    Electronic Resource
    Electronic Resource
    Host plant exploitation by the gypsy moth,Lymantria dispar (1978)
    Springer
    Entomologia experimentalis et applicata 24 (1978), S. 228-237 
    Details
    ISSN: 1570-7458
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology
    Description / Table of Contents: Résumé Bien queLymantria dispar soit très polyphage, son comportement alimentaire et son écologie s'adaptent aux variations du milieu et à d'autres changements, notamment l'âge larvaire. La nature et l'étendue de ces réactions, qui déterminent l'exploitation de la plante-hôte par les larves, se reflètent en partie dans des facteurs tels que l'acceptabilité de la plante-hôte pour les larves, et son adaptation à leur développement et la transformation métabolique du feuillage de l'hôte. En général, il y a concordance entre ces paramètres pour les hôtes très recherchés comme le chêne rouge et pour les hôtes relativement peu rechterchés comme l'érable rouge (Acer rubrum). Ainsi, le chêne rouge est aisément accepté par les larves et produit des larves à croissance rapide qui deviennent de grosses pupes. L'érable rouge a l'effet opposé. Ces caractéristiques déterminent la structure fine de l'exploitation de la plantehôte mais d'autres facteurs non nutritionnels peuvent intervenir dans l'exploitation de la plante-hôte. La présence de lambeaux d'écorce, permettant le repos essentiel à la survie, peut être très importante dans le choix de l'hôte pouvant être utilisé avec succès.
    Notes: Abstract The natural occurrence of gypsy moth (Lymantria dispar L.) on different tree species in New England is compared with experimental results on host plant preference, utilisation of food and overall suitability of the different species as food plants. Highest numbers were found on red and white oak (Quercus rubra andQuercus alba), but leaves of some other species were acceptable. Some others were also suitable for development. The importance of variation between individuals is stressed, as is the need to consider the whole biological need of the animal in the environment, and not just individual factors such as feeding.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF02385069
    Location Call Number Expected Availability
    BibTip Others were also interested in ...
    Paper (German National Licenses)
    Fulltext
  • 7
    Electronic Resource
    Electronic Resource
    Influence of dietary nicotine on the fall armyworm, Spodoptera frugiperda and its parasitoid, the ichneumonid wasp Hyposoter annulipes (1988)
    Springer
    Entomologia experimentalis et applicata 46 (1988), S. 227-232 
    Details
    ISSN: 1570-7458
    Keywords: tri-trophic level interactions ; nicotine ; alkaloid ; Hyposoter annulipes ; Hymenoptera ; Ichneumonidae ; fall armyworm ; Spodoptera frugiperda ; Lepidoptera ; Noctuidae
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology
    Description / Table of Contents: Résumé Des quantités croissantes de nicotine dans l'alimentation ont prolongé la durée du développement des chenilles saines, bien que l'effet ait chuté aux concentrations les plus élevées. Le sexe de la noctuelle n'a pas eu d'effet sur la durée du développement ou l'action de la nicotine. L'influence de la nicotine sur le poids des chrysalides est inhabituel, en ce sens que les chrysalides les plus lourdes ont été obtenues aux concentrations moyennes. Des hypothèses sont proposés sur l'origine de ce phénomène. La mortalité et la durée de développement de H. annulipes ont augmenté et le poids des adultes a diminué quand la concentration de l'aliment de l'hôte en nicotine s'est élevée. L'effet différente de la nicotine sur des générations successives a pu provenir de modifications de la toxicité de la nicotine en fonction de changements dans la qualité de l'aliment. Quoi qu'il en soit, l'augmentation de la concentration de la nicotine dans l'alimentation de l'hôte a eu un effet négatif cohérent sur la valeur adaptative de H. annulipes.
    Notes: Abstract Experiments were conducted to determine the influence of nicotine (at a range of concentrations) in the food of an herbivorous host on the development, size and survival of its parasitoid. Fall armyworms, Spodoptera frugiperda (Smith) (Lepidoptera: Noctuidae) were reared on diets of 0, 0.025, 0.050 and 0.075% nicotine and exposed to parasitism by Hyposoter annulipes (Hymenoptera: Ichneumonidae). As nicotine concentration increased parasitoid mortality and development time increased and adult weight decreased. Development time, pupal weight and survival were recorded for unparasitized armyworms. Unparasitized fall armyworms showed lengthened development and higher mortality but pupal weights were greatest at intermediate nicotine concentrations.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00364193
    Location Call Number Expected Availability
    BibTip Others were also interested in ...
    Paper (German National Licenses)
    Fulltext
  • 8
    Electronic Resource
    Electronic Resource
    Effects of feeding on healthy and diseased corn plants on a vector and on a non-vector insect (1995)
    Springer
    Cellular and molecular life sciences 51 (1995), S. 293-299 
    Details
    ISSN: 1420-9071
    Keywords: Cicadellidae ; Delphacidae ; Homoptera ; leafhoppers ; mollicutes ; planthoppers ; Spiroplasma
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology , Medicine
    Notes: Abstract Insect-transmitted plant pathogens can have positive, negative or no effects on the vector insect. Effects could be direct (caused by the pathogen) or indirect (mediated by changes in the plant). Pathogen effects on non-vector insects are less well known.Peregrinus maidis (Ashmead) (Homoptera: Delphacidae), an insect that is not a vector of the corn stunt spiroplasma (CSS), weighed less 15 days after feeding on CSS-infected corn plants relative to insects feeding on healthy corn plants. Fecundity of non-vector insects that were removed from diseased plants was higher than for insects coming from healthy plants. ForDalbulus maidis (DeLong & Wolcott) (Homoptera: Cicadellidae), an insect that transmits CSS, there were no differences in weight, longevity, eggs per day, weekly or total fecundity after feeding on healthy or on CSS-infected corn plants. Significant differences in some phloem amino acids were detected between healthy and CSS-infected plants. Infected plants also showed an increased phloem acidity as disease symptoms progressed. Feeding on CSS-infected corn plants by an insect that does not vector the pathogen infecting the plant can have favorable consequences as evidenced by an increased fecundity.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF01931115
    Location Call Number Expected Availability
    BibTip Others were also interested in ...
    Paper (German National Licenses)
    Fulltext
  • 9
    Electronic Resource
    Electronic Resource
    Growth, development, feeding preference, and food consumption and utilization by tobacco hornworm on tobacco mosaic virus-infected and non-infected tobacco leaves (1990)
    Springer
    Cellular and molecular life sciences 46 (1990), S. 521-524 
    Details
    ISSN: 1420-9071
    Keywords: Manduca sexta ; tobacco mosaic virus ; tobacco hornworm ; plant pathogen/insect interaction
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology , Medicine
    Notes: Summary Plant disease may cause a variety of changes in plants which influence their suitability to insect herbivores. The reported physiological changes in tobacco due to infection by tobacco mosaic virus have the potential to influence the feeding, growth and behavior of the tobacco hornworm,Manduca sexta. However, feeding on foliage of systematically infected plants had no statistically significant effects on development time, mean pupal weight or the amount of foliage consumed by 4th instars. Although an initial preference was exhibited by larvae for healthy leaves after about 72 h no differences were observed. These results do not support the results of previous research on the influence of tobacco mosaic virus-infected plants on the tobacco hornworm.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF01954253
    Location Call Number Expected Availability
    BibTip Others were also interested in ...
    Paper (German National Licenses)
    Fulltext
  • 10
    Electronic Resource
    Electronic Resource
    Spatial heterogeneity, population “regulation” and local extinction in simulated host-parasitoid interactions (1987)
    Springer
    Oecologia 73 (1987), S. 609-614 
    Details
    ISSN: 1432-1939
    Keywords: Host-parasitoid interactions ; Persistence ; Spatial heterogeneity ; Negative binomial model
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology
    Notes: Summary Simulation models have recently been used to suggest that spatial heterogeneity, acting on small spatial scales within local populations, may allow parasitoids and other natural enemies to “regulate” host or prey populations in ways that would not be detected by conventional (k-factor) analyses of life table data. However, additional study of these models suggests that local extinction may be a frequent event in the simulated interactions. The “spreading of risk” concept appears more applicable to the simulated populations than a classical view emphasizing tight regulation around stable equilibrium points. The spreading of risk viewpoint also appears to shed additional light on questions raised in the recent debate between Dempster (1983); Hassel (1985); Dempster and Pollard (1986), concerning the modeling of spatial heterogeneity and “regulation” in temperate-zone insect populations.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00379424
    Location Call Number Expected Availability
    BibTip Others were also interested in ...
    Paper (German National Licenses)
    Fulltext
Close ⊗
This website uses cookies and the analysis tool Matomo. More information can be found here...