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  • Coleoptera  (39)
  • pheromone  (34)
  • Immunocytochemistry  (27)
  • oxidation  (27)
  • Springer  (122)
  • Annual Reviews
  • 1985-1989  (83)
  • 1975-1979  (39)
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  • 1
    Electronic Resource
    Electronic Resource
    Isolation of feeding deterrents against argentine stem weevil from ryegrass infected with the endophyteAcremonium loliae (1986)
    Springer
    Journal of chemical ecology 12 (1986), S. 647-658 
    Details
    ISSN: 1573-1561
    Keywords: Perennial ryegrass ; Lolium perenne ; Gramineae ; Argentine stem weevil ; Listronotus bonariensis ; Coleoptera ; Curculionidae ; Acremonium loliae ; Acremonium coenophialum ; endophyte ; bioassay ; induced resistance ; feeding deterrent ; peramine
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology , Chemistry and Pharmacology
    Notes: Abstract Infection of ryegrass (Lolium perenne) by an endophytic fungus (Acremonium loliae) confers resistance against the Argentine stem weevil (Listronotus bonariensis). Extracts from ryegrass clones, infected and uninfected withA. loliae, were compared in a feeding choice bioassay, and several fractions were identified which affected stem weevil feeding behavior. One stem weevil feeding deterrent, peramine C12H17N5O, has been isolated from infected ryegrass and partially characterized as a basic indole derivative. Extracts from culturedA. loliae had no effect on stem weevil feeding behavior nor was peramine detected in the fungal cultures examined. Peramine and the other active substances are hydrophilic in contrast to the lipophilic properties reported for the neurotoxic lolitrems also isolated from ryegrass infected withA. loliae and associated with causing ryegrass staggers disorder in livestock. It is suggested that ryegrass staggers and stem weevil feeding deterrency may arise by different biochemical mechanisms.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF01012099
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  • 2
    Electronic Resource
    Electronic Resource
    Feeding by adult sweet potato weevils, Cylas formicarius elegantulus, on sweet potato leaves (1988)
    Springer
    Entomologia experimentalis et applicata 48 (1988), S. 157-163 
    Details
    ISSN: 1570-7458
    Keywords: sweet potato weevil ; Cylas formicarius elegantulus ; Coleoptera ; Curculionidae ; sweet potato ; Ipomoea batatas ; feeding ; host-plant preference ; leaf surface chemistry
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology
    Description / Table of Contents: Résumé L'étude a porté sur la consommation pendant 12 h, en boîtes de Pétri de diamètre 9 cm, de rondelles de 2 cm de diamètre de feuilles de 4 cultivars,—Centennial, Jewel, Resisto, Regal—, d'I. batatas par C. formicarius elegantulus. Les charançons ont consommé le long des nervures, préférant la face inférieure à la face supérieure des feuilles. Un index de consommation a été calculé en fonction de la longueur de nervure ayant servi à la consommation, rapportée à la longueur totale des nervures de la surface exposée. Les niveaux de consommation des mâles et des femelles étaient semblables. En présence de choix binaires, le cultivar Centennial a été le plus consommé, et le cultivar Resisto, le moins, par les femelles. De telles préférences n'ont pas été observées en l'absence de choix. La composition chimique de la surface de la feuille a été analysée par chromatographie en phase gazeuse. 8 pics principaux identiques ont été observés chez les 4 cultivars, mais ils avaient différentes hauteurs.
    Notes: Abstract A bioassay was developed to quantify the feeding of adult sweet potato weevils, Cylas formicarius elegantulus (Summers) (Coleoptera; Curculionidae) on the foliage of four cultivars (Centennial, Jewel, Resisto and Regal) of sweet potato (Ipomoea batatas (L.) Lam.) (Convolvulaceae). Weevils fed along the leaf veins, preferring the lower to the upper leaf surface. Males and females had similar levels of feeding. Different levels of feeding by female weevils were observed between cultivars in dual-choice bioassays with Centennial, a susceptible cultivar in field-plot experiments, being most preferred and Resisto least preferred. However, these feeding differences were not observed in no-choice bioassays. Little difference was observed in the leaf surface chemistry of the four cultivars.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00185628
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  • 3
    Electronic Resource
    Electronic Resource
    Role of kinetic effects on metal partition at the alloy-scale interface during the oxidation of alloys (1975)
    Springer
    Oxidation of metals 9 (1975), S. 215-223 
    Details
    ISSN: 1573-4889
    Keywords: cation diffusion ; oxidation ; metal partition
    Source: Springer Online Journal Archives 1860-2000
    Topics: Mechanical Engineering, Materials Science, Production Engineering, Mining and Metallurgy, Traffic Engineering, Precision Mechanics
    Notes: Abstract An alternative mass balance at the alloy-scale interface is proposed for the Wagner theory of binary alloy oxidation. A simple relation between the bulk composition of the alloy and the scale composition at the alloy-scale interface, ξ′, is derived in terms of the transport properties of the scale and the limit of application of the relation defined. There is good agreement between calculated and measured values of ξ′.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00613274
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  • 4
    Electronic Resource
    Electronic Resource
    Effect of Y2O3 dispersoids in 80Ni-20Cr alloy on the early stages of oxidation at low-oxygen potential (1986)
    Springer
    Oxidation of metals 25 (1986), S. 29-50 
    Details
    ISSN: 1573-4889
    Keywords: oxidation ; Y2O3 ; dispersoid ; 80Ni-20Cr ; nucleation
    Source: Springer Online Journal Archives 1860-2000
    Topics: Mechanical Engineering, Materials Science, Production Engineering, Mining and Metallurgy, Traffic Engineering, Precision Mechanics
    Notes: Abstract Specimens of a 80Ni-20Cr type alloy, with and without Y2O3 dispersoid particles, were oxidized at 1000°C in H2/H2O mixtures where the partial pressure of oxygen (P O 2) was varied between 103 and 1024 atm. Oxide particles nucleated homogeneously on both alloys, and preferential nucleation on dispersoid particles at the surface was not observed. Continuous Cr2O3 films formed slightly faster at aP O 2 of 10−21 atm on the alloy containing the dispersoid, but the difference was negligible at higher pressures. Oxidation atP O 2=10-19 and 10−21 atm involved both the formation of Cr2O3 and the evaporation of chromium. Thin films of α-Al2O3 were observed on both alloys after oxidation atP O 2.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00807995
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  • 5
    Electronic Resource
    Electronic Resource
    Aggregation pheromone of square-necked grain beetle,Cathartus quadricollis (Guér.) (1988)
    Springer
    Journal of chemical ecology 14 (1988), S. 2169-2184 
    Details
    ISSN: 1573-1561
    Keywords: Cathartus quadricollis (Guér.) ; square-necked grain beetle ; Coleoptera ; Cucujidae ; aggregation pheromone ; (3R,6E)-7-methyl-6-nonen-3-yl acetate ; (E)-7-methyl-6-nonen-3-one ; (E)-7-methyl-6-nonen-3-ol ; (6E)-7-methyl-3-propyl-2,6-nonadienyl acetate ; 1-octen-3-ol ; repellent
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology , Chemistry and Pharmacology
    Notes: Abstract When feeding on rolled oats, male square-necked grain beetles,Cathartus quadricollis (Guér.), produced the aggregation pheromone (3R,6E)-7-methyl-6-nonen-3-yl acetate, for which the trival name “quadrilure” is proposed. The pheromone was highly attractive to both sexes in a two-choice, pitfall olfactometer modified to retain responding beetles by placing a food stimulus (an oat flake) in the glass vials containing the experimental and control stimuli. TheS enantiomer of the pheromone was inactive. Males also produced small amounts of (E)-7-methyl-6-nonen-3-one, (E)-7-methyl-6-nonen-3-ol, and (6E)-7-methyl-3-propyl-2,6-nonadienyl acetate, but these compounds were inactive in the laboratory bioassay. Segregated males and females both produced (R)-(−)-1-octen-3-ol, which by itself was repellent to both sexes but did not diminish beetle response to the aggregation pheromone.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF01014023
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  • 6
    Electronic Resource
    Electronic Resource
    Female pheromone in the black molly fish (Mollinenesia latipinna): A possible metabolic correlate (1977)
    Springer
    Journal of chemical ecology 3 (1977), S. 207-217 
    Details
    ISSN: 1573-1561
    Keywords: Black molly fish ; Mollinenesia latipinna ; pheromone ; thyroxine ; thiouracil ; general activity stimulus ; social contact
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology , Chemistry and Pharmacology
    Notes: Abstract The female black mollyMollinenesia latipinna emits a water-borne pheromone which increases general activity and social contacts among males. Two hormones, thyroxine and thiouracil, administered to the females increase these behaviors in males. Apparently the hormones do not functionally compete in this species, and both seem to elevate the emission of the male stimulant.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00994147
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  • 7
    Electronic Resource
    Electronic Resource
    Thickness determination of oxide films on iron by electron back-scattering Mössbauer spectroscopy (1978)
    Springer
    Oxidation of metals 12 (1978), S. 247-256 
    Details
    ISSN: 1573-4889
    Keywords: oxidation ; iron ; magnetite ; oxide thickness ; electron back-scattering Mössbauer spectroscopy
    Source: Springer Online Journal Archives 1860-2000
    Topics: Mechanical Engineering, Materials Science, Production Engineering, Mining and Metallurgy, Traffic Engineering, Precision Mechanics
    Notes: Abstract Magnetite films in the range 265–4520 Å have been grown on natural iron substrates and subsequently investigated by electron back-scattering Mössbauer spectroscopy. In particular, the percentage, P, of the total spectrum area contributed by the oxide has been determined as a function of oxide thickness, d. It was found that d up to ≈ 3000Å may be expressed (to an accuracy of ∼ 5%) by d (Å)=−1.95 × 103 ln (1–0.01 P). The experimental data have been compared with the theoretical predictions of both Huffman and Bainbridge. Good agreement between experiment and Huffman's predictions of P is obtained using values of the electron attenuation coefficient, μ, of 1.10 × 104 cm2 g−1 for the 7.3 keV electrons and 1.73 × 104 cm2 g−1 for the 5.4 keV electrons. A good fit of our data to Bainbridge's expression requires a somewhat lower effective μ, value of 0.8 × 104 cm2 g−1. The experimental P value for the thickest oxide (4520 Å) is lower than the theoretical predictions, probably as a result of a neglected mechanism recently identified by Tricker, Ash, and Cranshaw.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00616099
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  • 8
    Electronic Resource
    Electronic Resource
    Low-temperature oxidation of Fe-24 wt.%Cr (1979)
    Springer
    Oxidation of metals 13 (1979), S. 437-456 
    Details
    ISSN: 1573-4889
    Keywords: Fe-Cr ; oxidation ; kinetics ; oxide morphology
    Source: Springer Online Journal Archives 1860-2000
    Topics: Mechanical Engineering, Materials Science, Production Engineering, Mining and Metallurgy, Traffic Engineering, Precision Mechanics
    Notes: Abstract Ferritic polycrystalline Fe-24 wt.% Cr was oxidized in pure oxygen at 190 ≤ T≤490° C and pressures in the range 5.3×10−2–13.3 Pa for periods of up to 5 hr. The reaction proceeded in three stages. An initial period of accelerating rate was accompanied by oxide island nucleation and growth. Following island coalescence the rate was approximately logarithmic at low temperatures and somewhat slower than parabolic at high temperatures. Rate control during this period was thought to be due to mass transport through the oxide grain boundaries left by the island impingement process. During these first two stages the oxide formed was γ-M2O3 with possibly some spinel. The final stage of reaction involved the appearance of α-M2O3 on the outer oxide surface and a substantial slowing of the oxidation rate due to the low diffusivity in this phase.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00605109
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  • 9
    Electronic Resource
    Electronic Resource
    Immunoreactive neuronal pathways of growth hormone-releasing hormone (GRH) in the brain and pituitary of the teleost Gadus morhua (1985)
    Springer
    Cell & tissue research 241 (1985), S. 487-493 
    Details
    ISSN: 1432-0878
    Keywords: Hypothalamus ; Teleost fish ; Pituitary ; Growth hormone releasing hormone ; Immunocytochemistry
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology , Medicine
    Notes: Summary Using an antiserum directed against the C-terminus of hGRH(1–44)NH2 and another recognizing the mid portion to C-terminal of hGRH(1–40)OH, we identify two immunocytochemically distinct GRH-immunoreactive systems in the brain of the codfish, Gadus morhua. The antiserum directed against GRF(1–44)NH2 stains cell bodies exclusively in the rostral pars distalis. The other antiserum immunoreactive with GRF(1–40)OH reacts with a population of parvocellular and magnocellular neuronal cell bodies in the hypothalamus and with two major axonal pathways which project toward the median eminence and terminate primarily in the pars nervosa. These results indicate the presence of at least two forms of hGRH-like peptides in the teleost which may have different roles in the regulation of pituitary function.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00214567
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  • 10
    Electronic Resource
    Electronic Resource
    Immunocytochemical demonstration of vertebrate neuropeptides in the earthworm Lumbricus terrestris (Annelida, Oligochaeta) (1989)
    Springer
    Cell & tissue research 257 (1989), S. 577-586 
    Details
    ISSN: 1432-0878
    Keywords: Neuropeptides ; Immunocytochemistry ; Lumbricus terrestris (Annelida, Oligochaeta)
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology , Medicine
    Notes: Summary The localisation and distribution of 10 vertebrate-derived neuropeptides in the earthworm, Lumbricus terrestris, have been determined by an indirect immunofluorescence technique. The peptides are pancreatic polypeptide (PP), peptide tyrosine tyrosine (PYY), neuropeptide Y (NPY), glucagon (C-terminal), vasoactive intestinal polypeptide (VIP), peptide histidine isoleucine (PHI), gastrinreleasing peptide (GRP), calcitonin gene-related peptide (CGRP), neurotensin (NT), and met-enkephalin. For 6 of the peptides — PYY, NPY, PHI, glucagon, GRP and CGRP — this is the first demonstration of their presence in any annelid, and NT has not previously been described in an oligochaete. Cell bodies and nerve fibres immunoreactive to the 10 peptides occur throughout the CNS. In the PNS, epidermal sensory cells displayed immunoreactivities to PP and PYY, and PP-, PYY-, NPY-, PHI- and GRP-like immunoreactivities occurred in nerve fibres supplying the main body muscles. Nerve fibres immunoreactive to PP and PYY are also associated with the innervation of the gut (pharynx, oesophageal glands, and mid and posterior regions of the intestine). No endocrine cells immunoreactive for any of the antisera tested could be identified in the gut epithelium, suggesting that dual location of peptides in the brain and gut epithelium is a phenomenon that occurred at a later stage in evolution. No immunoreactive elements were detected in any of the organs and ducts of the reproductive and excretory systems.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00221468
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