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  • 1
    Electronic Resource
    Electronic Resource
    Radiative lifetime and quenching of the 3p 4D0 state of atomic nitrogen (1987)
    College Park, Md. : American Institute of Physics (AIP)
    The Journal of Chemical Physics 86 (1987), S. 4876-4884 
    Details
    ISSN: 1089-7690
    Source: AIP Digital Archive
    Topics: Physics , Chemistry and Pharmacology
    Notes: The radiative lifetime of nitrogen atoms in the 3p 4D0 state is determined to be 43±3 ns, and the total removal rate constants from the excited 3p 4D0 state of nitrogen atoms are measured for collisions with He, Ne, Ar, Kr, Xe, and N2. In a low pressure discharge flow reactor, the 3p 4D0 state is prepared by two-photon excitation from the 4S0 ground state of atomic nitrogen. Time-resolved fluorescence from the 3p 4D0→3s 4P transition monitors the temporal evolution of the population in the 3p 4D0 state. As the rare gases become heavier with a more complex electron cloud, the quenching rate constants increase from less than 0.6×10−11 cm3 s−1 for He to a value of 66±12×10−11 cm3 s−1 for Xe. Collision mechanisms which might account for such a dramatic increase are discussed.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1063/1.452658
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  • 2
    Electronic Resource
    Electronic Resource
    Influence of epicuticular waxes from white spruce and balsam fir on feeding behavior of the eastern spruce budworm (1988)
    Springer
    Journal of insect behavior 1 (1988), S. 197-208 
    Details
    ISSN: 1572-8889
    Keywords: eastern spruce budworm ; Choristoneura fumiferana ; white spruce ; balsam fir ; epicuticular wax
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology
    Notes: Abstract Fourth-instar larvae of the eastern spruce bud-worm Choristoneura fumiferanaClem. (Lepidoptera: Tortricidae) were shown in two-choice feeding tests to respond differently to epicuticular waxes from different white spruce and balsam fir trees. Larvae also showed different preferences for various wax fractions obtained by separation on silicic acid.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF01052238
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  • 3
    Electronic Resource
    Electronic Resource
    Feeding preferences of eastern spruce budworm larvae in two-choice tests with combinations of host-plant extracts (1985)
    Springer
    Entomologia experimentalis et applicata 38 (1985), S. 221-225 
    Details
    ISSN: 1570-7458
    Keywords: Eastern spruce budworm ; Choristoneura fumiferana ; Tortricidae ; feeding behaviour ; host plant extracts ; sugars/glycosides ; amino acids/bases ; organic acids ; two-choice feeding tests ; fir ; Abies ; spruce ; Picea spp
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology
    Description / Table of Contents: Résumé Trois extraits ont été obtenus de chacune de quatre plantes-hôtes: sucres/glycosides; acides aminées/bases organiques; acides organiques. Les quatre plantes-hôtes étudiées furent le sapin baumier, et les épinettes blanc, noir, et rouge. Le comportement gustatoire des larves a été étudié en raison de l'effet de combinaisons d'extraits de chaque plantehôte. Les résultats comparent la préférence des larves ainsi que leur consommation totale envers ces extraits.
    Notes: Abstract Three extracts were obtained from each of four host plants: sugars/glycosides; amino acids/bases; and organic acids. The four hosts studied were balsam fir, black spruce, red spruce, and white spuce. The effects of recombined host plant extracts on the feeding behaviour of eastern spruce budworm larvae were examined in two-choice tests. Results compare feeding preferences as well as feeding rates between combinations of extracts. The importance of each class of polar compounds is discussed.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00295254
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  • 4
    Electronic Resource
    Electronic Resource
    Targeting of a foreign protein to chloroplasts by fusion to the transit peptide from the small subunit of ribulose 1,5-bisphosphate carboxylase (1985)
    [s.l.] : Nature Publishing Group
    Nature 313 (1985), S. 358-363 
    Details
    ISSN: 1476-4687
    Source: Nature Archives 1869 - 2009
    Topics: Biology , Chemistry and Pharmacology , Medicine , Natural Sciences in General , Physics
    Notes: [Auszug] Chimaeric genes can be constructed which fuse the transit peptide of a small subunit of the chloroplast-located ribulose l,5-bisphosphate carboxylase with a bacterial protein. The fusion protein is translocated into chloroplasts and cleaved in a similar way to the small subunit polypeptide ...
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1038/313358a0
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  • 5
    Electronic Resource
    Electronic Resource
    Unusual chromosome complement in the brooding bivalve Lasaea consanguinea (1988)
    Springer
    Genetica 76 (1988), S. 143-151 
    Details
    ISSN: 1573-6857
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology
    Notes: Abstract Chromosomes of the brooding species Lasaea consanguinea were studied as part of a general invertigation of evolutionary genetics of antarctic bivalve species. Laseid species are of particular interest because they are widely distributed geographically, they inhabit the high intertidal zone, and they may reproduce apomictically. The diploid number of chromosomes for Lasaea consanguinea ranges from 100 to 120, 110 to 112 being most frequent. Karyological data (2n=108) show 6 groups of chromosomes. Group I includes 8 metacentric (m), 3 submetacentric (sm), 2 subtelocentric (st) and 4 telocentric (t) pairs. Group II has 11 t to st pairs; group III, 9 sm to m pairs; group IV, 8 m to sm pairs; group V, 6 st and group VI, 3 m pairs. Within each of the Groups II to VI chromosome pairs are of about the same size and morphology. The chromosomes of Lasaea consanguinea are unusual because of their abundance, their large size and their numerical variability. We suggest that Lasaea consanguinea has had a hermaphroditic ancestor where abnormal reproduction such as inbreeding, lack of males, and apomixy gave rise to genetic instability, the high number of chromosomes being related to the genetic instability with evolutionary polyploidy or/and supernumerary chromosomes.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00058813
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  • 6
    Electronic Resource
    Electronic Resource
    Orientation behavior of second-instar larvae of eastern spruce budwormChoristoneura fumiferana (Clem.) (Lepidoptera: Tortricidae) in a y-type olfactometer (1985)
    Springer
    Journal of chemical ecology 11 (1985), S. 837-845 
    Details
    ISSN: 1573-1561
    Keywords: Eastern spruce budworm ; Choristoneura fumiferana ; Lepidoptera ; Tortricidae ; conifers ; Picea sp. ; Abies sp. ; host volatiles ; attraction ; larval olfaction ; olfactometer
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology , Chemistry and Pharmacology
    Notes: Abstract A two-choice, wind-tunnel olfactometer was designed and contructed to determine whether second-instar eastern spruce budworm larvae,Christoneura fumiferana (Clem.), could detect and discriminate among host-plant volatiles. Volatiles of current year's growth ofPicea glauca were preferred over those ofP. rubens, P. mariana, or air.Abies balsamea was preferred overP. mariana or air.P. rubens andP. mariana were both preferred over air. Two-year-old growth ofP. glauca, A. balsamea, P. rubens, andP. mariana were all preferred over air. Current year's growth of these host evergreen species was usually preferred over former year's growth of the same species in each case.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF01012072
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  • 7
    Electronic Resource
    Electronic Resource
    Tests for induction of feeding preferences in larvae of eastern spruce budworm using extracts from three host plants (1985)
    Springer
    Journal of chemical ecology 11 (1985), S. 809-817 
    Details
    ISSN: 1573-1561
    Keywords: Eastern spruce budworm ; Lepidoptera ; Tortricidae ; Choristoneura fumiferana ; host preference ; deterrence
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology , Chemistry and Pharmacology
    Notes: Abstract Feeding preferences to extracts from three host plants were determined for sixth-instar eastern spruce budworm larvae reared on one of three hosts or on artificial diet. Preferences of foliage-reared larvae were compared to those of diet-reared, or naive, larvae. No effect of plant induction was found using amino acids and bases and chloroform extracts on test disks in three-choice experiments. Possible effects of habituation for sugars and glycosides from white spruce were shown. Organic acids contributed to a phenomenon of avoidance learning in larvae reared on all three hosts, showing that this fraction from balsam fir was the least deterrent, while that from black spruce was the most deterrent.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00988308
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  • 8
    Electronic Resource
    Electronic Resource
    A new light synthesis optimization program. Test on simulated Algol data (1989)
    Springer
    Space science reviews 50 (1989), S. 269-278 
    Details
    ISSN: 1572-9672
    Source: Springer Online Journal Archives 1860-2000
    Topics: Physics
    Notes: Abstract Simulation of light curve effects in Algol systems that are near contact or that may evolve into contact requires a different model than the tri-axial ellipsoid used in many current studies. A new light synthesis optimization program, based on the Roche model, satisfies the model requirements and determines system parameters with excellent accuracy, given a sufficiently large set of observations. A widely used criterion for stopping iterative solutions is inadequate. A working criterion is proposed as a replacement.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00215936
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  • 9
    Electronic Resource
    Electronic Resource
    Solid opaline packings of colloidal silica spheres (1989)
    Springer
    Journal of materials science 8 (1989), S. 1371-1373 
    Details
    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
    URL: http://dx.doi.org/10.1007/BF00720190
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  • 10
    Electronic Resource
    Electronic Resource
    Feeding preferences of eastern spruce budworm larvae in two-choice tests with extracts of mature foliage and with pure amino acids (1988)
    Springer
    Journal of chemical ecology 14 (1988), S. 1649-1656 
    Details
    ISSN: 1573-1561
    Keywords: Eastern spruce budworm ; Choristoneura fumiferana ; Lepidoptera ; Tortricidae ; amino acids ; proline ; sucrose ; extracts ; host plants ; feeding behavior
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology , Chemistry and Pharmacology
    Notes: Abstract The feeding preferences and feeding rates of eastern spruce budworm on extracts from mature foliage normally avoided by larvae indicate that the chemical composition of four major host plants does not account for this avoidance. Other factors such as the degree of lignification and/or moisture content of the older foliage may play a more important role. Of 14 amino acids tested, alanine, lysine, proline, and serine stimulated feeding. The interactions of amino acids and sucrose were studied, and the results are discussed in relation to feeding preferences and feeding rates.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF01014549
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