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  • Coleoptera
  • Hymenoptera
  • Lepidoptera
  • Turbulence
  • Yeast
  • phosphorus
  • Springer  (46)
  • Annual Reviews
  • Blackwell Publishing Ltd
  • Springer International Publishing
  • 2020-2024
  • 2005-2009
  • 1990-1994
  • 1980-1984  (46)
  • 1970-1974
  • 1980  (46)
Collection
Keywords
Publisher
  • Springer  (46)
  • Annual Reviews
  • Blackwell Publishing Ltd
  • Springer International Publishing
  • Wiley-Blackwell  (1)
Years
  • 2020-2024
  • 2005-2009
  • 1990-1994
  • 1980-1984  (46)
  • 1970-1974
Year
  • 1
    Electronic Resource
    Electronic Resource
    Triacylglycerols as fatty acid donors for membrane phospholipid biosynthesis in yeast (1980)
    Springer
    Monatshefte für Chemie 111 (1980), S. 355-363 
    Details
    ISSN: 1434-4475
    Keywords: Cerulenin ; Fatty acid donor ; Inositol deficiency ; Phospholipid biosynthesis ; Triacylglycerols ; Yeast
    Source: Springer Online Journal Archives 1860-2000
    Topics: Chemistry and Pharmacology
    Description / Table of Contents: Zusammenfassung Der Umsatz der Lipide vonSaccharomyces carlsbergensis ATCC 9080 wurde nach Vormarkierung mit3H-Ölsäure und14C-Palmitinsäure untersucht. Inositversorgte Zellen zeigen eine Verschiebung der Fettsäuren von den Triacylglycerinen in die Phospholipide, im besonderen in Phosphatidylcholin und Phosphatidylinosit. Eine verstärkte Übertragung der Fettsäuren von Triacylglycerinen auf Phospholipide konnte festgestellt werden, wenn vormarkierte Zellen auf ein Nährmedium, welches Cerulenin enthielt, übertragen wurde. Cerulenin inhibiert die Fettsäuresynthese und ruft in wachsenden Zellen Fettsäuremangel hervor. Inositdefiziente Hefezellen, welche einen erhöhten Triacylglycerinspiegel aufweisen, verwenden diese Triacylglycerine unter Fettsäuremangelbedingungen ebenfalls für die Synthese von Phospholipiden, besonders von Phosphatidylcholin, Phosphatidyläthanolamin und Phosphatidylserin. Da aus früheren Arbeiten bekannt ist, daß inSaccharomyces carlsbergensis praktisch keine β-Oxidation existiert, können die Triacylglyerine in diesem Hefestamm als Speicher für Fettsäuren angesehen werden, welche zur Synthese von Phospholipiden dienen.
    Notes: Abstract The turnover of lipids was studied in the yeast,Saccharomyces carlsbergensis ATCC 9080, after prelabeling of the cells with [3H] oleic acid and [14C] palmitic acid. In inositol supplemented cells, a redistribution of fatty acids from triacylglycerols to phospholipids (mainly phosphatidylcholine and phosphatidylinositol) could be demonstrated. An increased transfer of fatty acids from triacylglycerols to phospholipids was observed when prelabeled cells were transferred to a growth medium containing cerulenin, which inhibits fatty acid synthesis and thus induces fatty acid deficiency in the growing cells. Inositol deficient cells contain increased levels of triacylglycerols, which are equally well utilized for phospholipid (mainly phosphatidylcholine, phosphatidylethanolamine and phosphatidylserine) synthesis under conditions of fatty acid deficiency. The present results together with the previous finding that β-oxidation is practically absent inSaccharomyces carlsbergensis suggest that in this yeast triacylglycerols function as storage of fatty acids which can be mobilized for phospholipid biosynthesis.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00903231
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  • 2
    Electronic Resource
    Electronic Resource
    Recombinational analysis of OXI1 mutants and preliminary analysis of their translation products in S. cerevisiae (1980)
    Springer
    Current genetics 2 (1980), S. 45-51 
    Details
    ISSN: 1432-0983
    Keywords: Yeast ; Mitochondria ; Intragenic recombination ; Mutant polypeptides
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology
    Notes: Summary Recombinational analysis of oxil mutants was performed using a and a mutant strains with the same mitochondrial and nuclear backgrounds, derived from strain 777-3A. In spite of minor inconsistencies the overall map of oxi1 mutations can be constructed on the basis of wild-type recombinant frequencies in the two-point oxi1 − − x oxi1 − crosses. The frequencies of wild-type recombinants varied in a wide range from 0.003% to 16%, reaching the maximal values expected for unlinked mitochondria) markers. No distinct clusters of mutants were observed. The analysis of translation products of oxil mutants showed that all but one of the oxil mutants studied are connected with the conspicuous changes of the polypeptide band corresponding to subunit 11 of cytochrome c oxidase in electrophoresis on polyacrylamide gels. The exceptional G565 mutant showed no conspicuous change in subunit II, but lacked subunit I of cytochrome c oxidase. Various oxi1 mutants seemed to carry premature chain termination mutations. Most of them show a correlation between the length of the putative fragment of subunit II synthesized and the position on the genetic map. The direction of translation is from the V2 to the V60 mutation. The V2 mutation is proximal to cap and V60 proximal to the par locus.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00445693
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  • 3
    Electronic Resource
    Electronic Resource
    Genetics and biochemistry of resistance to axenomycin in Saccharomyces cerevisiae (1980)
    Springer
    Current genetics 2 (1980), S. 61-67 
    Details
    ISSN: 1432-0983
    Keywords: Axenomycin ; Ribosome genetics ; Yeast ; Protein synthesis
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology
    Notes: Summary Axenomycin inhibits protein synthesis in vivo and in vitro in Saccharomyces cerevisiae. The antibiotic acts by binding to ribosomes, most probably to the large ribosomal subunit. Mutant strains resistant to axenomycin appear to contain ribosomes that are not inhibited by the antibiotic. The responsible gene has been mapped on the VII chromosome between the centromere and the leu1 gene.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00445695
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  • 4
    Electronic Resource
    Electronic Resource
    Repair of 2 um Plasmid DNA in Saccharomyces cerevisiae (1980)
    Springer
    Current genetics 2 (1980), S. 207-210 
    Details
    ISSN: 1432-0983
    Keywords: Yeast ; Plasmid ; Repair
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology
    Notes: Summary We have developed a system for assaying pyrimidine dimers in the 2 ⇐m DNA plasmid of Saccharomyces cerevisiae, using Micrococcus luteus UV endonuclease to nick dimer-containing plasmid molecules and measuring percentages of nicked and covalently closed circles on agarose gels. UV-irradiation induced dimers in plasmid DNA, in vivo, at the same rate as in chromosomal DNA. After a dose of 20 Joules·m−2, approximately 86% of plasmid molecules had. at least one dimer. After 3 h incubation under normal growth conditions only 4% still retained dimers in a wild-type strain. In a rad1 (excision-defective) mutant 81% of plasmid molecules still had dimers after 3 h, suggesting that excision repair operates to remove dimers from plasmid DNA in wild-type yeast. Dimers can be removed from 2 ,um DNA in a rad1 mutant by photoreactivation.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00435687
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  • 5
    Electronic Resource
    Electronic Resource
    Dimorphism of ribosomal protein L8 among different laboratory strains of Saccharomyces cerevisiae (1980)
    Springer
    Current genetics 2 (1980), S. 211-214 
    Details
    ISSN: 1432-0983
    Keywords: Yeast ; Ribosomal protein dimorphism
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology
    Notes: Summary Two-dimensional gel electrophoresis was used in a comparative study of ribosomal proteins from various strains of Saccharomyces cerevisiae. The results demonstrated a case of dimorphism of L8 protein of 60S ribosomal subunit. Of eight strains examined, two strains were one type and six were the other type. The former, which was tentatively designated as altered (A) type, was more acidic than the latter, common (C) type, as shown by mobility difference in pH gradient gel. Heterozygous (A/C) diploid cells contained both types of L8 protein and gave rise to tetrads of 2:2 segregation for A and C types, indicating that the difference of mobility was reflection of the allelic difference of the gene coding for L8 protein.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00435688
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  • 6
    Electronic Resource
    Electronic Resource
    Altered ribosomal protein L29 in a cycloheximide-resistant strain of Saccharomyces cerevisiae (1980)
    Springer
    Current genetics 1 (1980), S. 177-183 
    Details
    ISSN: 1432-0983
    Keywords: Yeast ; Ribosomal protein alteration ; Cycloheximide
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology
    Notes: Summary A spontaneous high-level cycloheximide-resistant mutant of the yeast Saccharomyces cerevisiae (strain cy32) is found to have an altered protein of the large subunit (60S) of cytoplasmic ribosomes, namely protein L29. The resistance character segregates together with this biochemical defect and is semidominant in heterozygous diploids. Judged from in vitro susceptibility to inhibition by cycloheximide there are at least 50% resistant ribosomes present in such diploid strains. From these results it is concluded that cycloheximide resistance of mutant cy32 is caused by mutation of a single gene and that it is the structural gene for L29 which is affected. Preliminary genetic mapping data are also reported. They indicate a location of cyhx-32 marker on chromosome 7 near met13.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00390941
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  • 7
    Electronic Resource
    Electronic Resource
    The effect of hydroxyurea on the mechanism of DNA synthesis in the yeast Saccharomyces cerevisiae (1980)
    Springer
    Current genetics 2 (1980), S. 175-180 
    Details
    ISSN: 1432-0983
    Keywords: Yeast ; Hydroxyurea ; DNA synthesis
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology
    Notes: Summary Newly synthesised DNA molecules the same size as replicons (7 million-60 million daltons) accumulate in yeast cells treated with hydroxyurea. During prolonged incubation in low concentrations of the drug, there is a large accumulation of these molecules without any corresponding increase in their molecular weight. On release from the inhibtion the molecules are converted to large molecular weight DNA. These observations are consistent with an inhibition by hydroxyurea of the joining of completed replicons. In addition, newly synthesised DNA molecules the size of yeast Okazaki fragments also accumulate in cells treated with hydroxyurea.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00435682
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  • 8
    Electronic Resource
    Electronic Resource
    Control of recombination within and between DNA plasmids of Saccharomyces cerevisiae (1980)
    Springer
    Current genetics 2 (1980), S. 193-200 
    Details
    ISSN: 1432-0983
    Keywords: Recombination ; Plasmids ; Transformation ; Yeast
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology
    Notes: Summary [2 μm+ and [2μm°] yeast were transformed to stable leucine prototrophy with the hybrid yeast — E. coli plasmid, pJDB219. This plasmid contains the entire sequence of the endogenous 2 μm yeast DNA plasmid in addition to the yeast nuclear LEU2 + gene and the Co1E1 derivative, pMB9. In the [2 μm+] transformants, a new wholly yeast LEU2 + plasmid, pYX, was generated, probably by a recombination event between pJDB219 and 2 μm DNA. The plamid, pYX, in the absence of 2 μm DNA, was found to exist in equimolar amounts of two forms, A and B, which probably arise by intramolecular recombination across the inverted repeat sequences of the 2 μm DNA portion of the plasmid. pJDB219 was found to require the presence of 2 μm DNA to undergo this intramolecular recombination. The results suggest that 2, μm DNA and pYX code for a gene product required in this recombination event which pJDB219 cannot produce.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00435685
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  • 9
    Electronic Resource
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    Fertilizer regime and changes in the phosphate and potash status of a silty marine clay soil during 25 years (1980)
    Springer
    Nutrient cycling in agroecosystems 1 (1980), S. 95-101 
    Details
    ISSN: 1573-0867
    Keywords: soil fertility ; phosphorus ; potassium ; green manure ; crop rotation
    Source: Springer Online Journal Archives 1860-2000
    Topics: Agriculture, Forestry, Horticulture, Fishery, Domestic Science, Nutrition
    Notes: Abstract Changes in the soil phosphorus and potassium status on three farming systems in the Northeast Polder during 25 years are related to the fertilizer regime over this period. The changes in the nutrient status of the soil are reflected in fertilizer policy. High rates of phosphate dressings markedly increased the phosphate status of the soil and built up a reserve of phosphate. In contrast, the potassium status decreased by about half, because only potatoes in the rotation were dressed with potassium. Methods of fertilization are discussed and suggestions are made with regard to possible improvements.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF01073181
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  • 10
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    Structure and dynamics of the stratosphere and mesosphere revealed by VHF radar investigations (1980)
    Springer
    Pure and applied geophysics 118 (1980), S. 494-527 
    Details
    ISSN: 1420-9136
    Keywords: MST radar ; Gravity waves ; Turbulence ; Stratospheric structure
    Source: Springer Online Journal Archives 1860-2000
    Topics: Geosciences , Physics
    Notes: Abstract Powerful VHF radars are capable of almost continuously monitoring the threedimensional velocity vector and the distribution of turbulence in the middle atmosphere, i.e. the stratosphere and mesosphere. Methods of radar investigations of the middle atmosphere are outlined and the basic parameters, mean and fluctuating velocities as well as reflectivity and persistency of atmospheric structures, are defined. Results of radar investigations are described which show that the tropopause level as well as a criterion on the stability of the lower stratosphere can be deduced. Besides mean wind velocities, VHF radars can measure instantaneous velocities due to acoustic gravity waves. The interaction of gravity waves with the background wind is discussed, and it is shown that cumulus convection is an effective source of gravity waves in the lower stratosphere. The vertical microstructure of the stratosphere, manifesting itself in thin stratified sheets in which temperature steps occur, is investigated by applying knowledge from investigations of the oceanic thermocline. Possible origins, like shear generation and lateral convection of the microstructure of the stratosphere, are discussed. Observations of gravity waves in the mesosphere are reviewed and their connection with turbulence structures is pointed out. Finally, some open questions which could be answered by further VHF radar investigations are summarized.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF01586465
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  • 11
    Electronic Resource
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    An electron microscopic study on the mating tube formation in the heterobasidiomycete Tremella mesenterica (1980)
    Springer
    Archives of microbiology 128 (1980), S. 215-221 
    Details
    ISSN: 1432-072X
    Keywords: Mating tube ; Microtubule ; Tremella ; Ultrastructure ; Yeast
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology
    Notes: Abstract Ultrastructure of the mating tube formed in yeast haplont of the heterobasidiomycete Tremella mesenterica was studied by electron microscopy. Cell wall of the mating tube emerged as evagination of the inner layers, rupturing outer layers of the mother cell wall. Comparison with budding cells suggested that the tube emergence place at bud scar and the process of tube emergence was the same as that of bud emergence. Electron transparent vesicles of 0.1 μm diameter were scattered in the cytoplasm of the mating tube. Nucleus-associated organelle was located at one side of the nuclear envelope which extended towards the mating tube. A few microtubules were detected in the mating tube, but their association with a nucleus was not clear. The cytoplasmic structure of the mating tube was discussed in comparison with that of hyphae of the filamentous fungi.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00406161
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  • 12
    Electronic Resource
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    Effect of growth temperature upon heat sensitivity in Saccharomyces cerevisiae (1980)
    Springer
    Archives of microbiology 124 (1980), S. 285-287 
    Details
    ISSN: 1432-072X
    Keywords: Yeast ; Saccharomyces cerevisiae ; Heat killing ; Membrane damage ; Genetic damage ; Growth temperature
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology
    Notes: Abstract The resistance of exponentially growing yeast cells to killing by exposure to 52°C increased markedly as the growth temperature was increased. Identical killing curves were obtained for cells suspended in growth medium or in 0.9% saline. Cells resistant to killing at 52°C were quite sensitive to killing at slightly higher temperatures. These results suggest a primary role for membrane damage in the mechanism of heat killing.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00427739
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  • 13
    Electronic Resource
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    Air permeation tests with orfralure for reduction in trap catch of oriental fruit moths (1980)
    Springer
    Journal of chemical ecology 6 (1980), S. 185-192 
    Details
    ISSN: 1573-1561
    Keywords: Oriental fruit moth ; orfralure ; sex pheromone ; traps ; air permeation with pheromone ; Lepidoptera ; Olethreutinae
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology , Chemistry and Pharmacology
    Notes: Abstract Orfralure [93% (Z), 7% (E)-8-dodecen-1-ol acetate], the synthetic pheromone of the oriental fruit moth,Grapholitha molesta (Busck), was released into the air of orchard test plots either by hanging plastic laminated dispensers on trees or by aerial dispersal of microcapsules containing a solution of the lure. Trap catch was reduced 95% or more with the most effective formulations, but consistently higher reductions were produced by the dispensers. In tests as long as 28 weeks with dispensers, a single retreatment at midseason maintained an effective concentration.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00987537
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  • 14
    Electronic Resource
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    Multifunctionality of douglas-fir beetle pheromone 3,2-mch confirmed with solvent dibutyl phthalate (1980)
    Springer
    Journal of chemical ecology 6 (1980), S. 193-201 
    Details
    ISSN: 1573-1561
    Keywords: Coleoptera ; Scolytidae ; Dendroctonus pseudotsugae ; pheromone ; multifunctionality ; 3-methylcyclohex-2-en-l-one ; diluent ; dibutyl phthalate
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology , Chemistry and Pharmacology
    Notes: Abstract Previous field and laboratory tests withDendroctonus pseudotsugae showing increased attractancy and chirp evocation by very low concentrations of the pheromone 3-methylcyclohex-2-en-1-one (3,2-MCH) dissolved in ethanol with known attractants were repeated with a different diluent, dibutyl phthalate (DBP). Other workers had speculated that the solvent ethanol was actually the synergist. Beetle response was essentially identical with both solvents, confirming the concentration-dependent multifunctionality of 3,2-MCH in Douglas-fir beetle behavior. Contradictions in available data with ethanol indicate unanswered questions about its effect withDendroctonus attractants.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00987538
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  • 15
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    Responses of some olfactory receptors of the eastern tent caterpillar (Malacosoma americanum) to leaves (1980)
    Springer
    Journal of chemical ecology 6 (1980), S. 213-220 
    Details
    ISSN: 1573-1561
    Keywords: Olfactory receptors ; chemoreception ; Lepidoptera ; Lasio-campidae ; plant volatiles ; tent caterpillars ; Malacosoma americanum
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology , Chemistry and Pharmacology
    Notes: Abstract Volatile constituents of leaves of acceptable and unacceptable plants evoke multiunit responses from the antennal olfactory sensilla of larvae of the eastern tent caterpillar. Electrophysiological investigation of the activities of three of the sixteen antennal olfactory receptors revealed that different combinations of the three responded to the various plants. In those instances where the same combination responded to more than one species of plant, the ratios of responses measured as frequency of action potentials were often different. Thus, discrimination of different plants theoretically could be based upon the absolute number of cells responding and/or the ratios of frequencies.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00987540
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  • 16
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    Enantiomer-based specificity in pheromone communication by two sympatricGnathoirichus species (Coleoptera: Scolytidae) (1980)
    Springer
    Journal of chemical ecology 6 (1980), S. 445-456 
    Details
    ISSN: 1573-1561
    Keywords: Gnathotrichus retusus ; G. sulcatus ; Coleoptera ; Scolytidae ; ambrosia beetle ; aggregation pheromone ; 6-methyl-5-hepten-2-ol ; sulcatol ; reproductive isolation ; enantiomers ; chiral compounds
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology , Chemistry and Pharmacology
    Notes: Abstract The aggregation pheromone ofGnathotrichus retusus was isolated and identified as (S)-(+)-sulcatol (6-methyl-5-hepten-2-ol). In laboratory and field experiments,G. retusus responded to (S)-(+)-sulcatol, but not to (±)-sulcatol, which was attractive to the sympatric species,G. sulcatus. G. sulcatus did not respond to optically pure (S)-(+)-sulcatol, but began to respond when ⩾ 1% (R)-(−)-sulcatol was present in an enantiomeric mixture.
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    URL: http://dx.doi.org/10.1007/BF01402921
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  • 17
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    Caste-dependent pheromones in the head of the antTetramorium caespitum (1980)
    Springer
    Journal of chemical ecology 6 (1980), S. 467-472 
    Details
    ISSN: 1573-1561
    Keywords: Pheromone ; caste ; ant ; Hymenoptera ; Formicidae ; Tetramorium caespitum ; 4-methyl-3-hexanol ; 4-methyl-3-hexanone
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology , Chemistry and Pharmacology
    Notes: Abstract The heads of maleT. caespitum contain 4-methyl-3-hexanol (1.7 μg, only the erythro isomer(s) detected) and 4-methyl-3-hexanone (0.8 μg). The heads of alate females contain 0.1 μg of each compound, whereas only the alcohol (0.1 ⧎g) was found in the heads of workers. Both compounds act as attractants for the workers and their possible functions are discussed.
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    URL: http://dx.doi.org/10.1007/BF01402923
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  • 18
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    Dufour's gland and its role in secretion of nest cell lining in bees of the genusColletes (Hymenoptera: Colletidae) (1980)
    Springer
    Journal of chemical ecology 6 (1980), S. 549-564 
    Details
    ISSN: 1573-1561
    Keywords: Colletes spp. ; bees ; Hymenoptera ; Colletidae ; Dufour's gland secretion ; nest cell lining
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology , Chemistry and Pharmacology
    Notes: Abstract The liquid secretion of the Dufour's gland in mated females comprises a mixture of macrocyclic lactones, straight chain mono- and dicarboxylic acids, together with trace amounts of di- and trihydroxy monocarboxylic acids and a series ofn-alkanes. Polymerization of the liquid to form the membranous nest cell lining, which also contains alanine and glutamic acid as major constituents, may be mediated by an enzyme from the thoracic salivary gland and voided via the mouth. The composition and structure of the cell linings are similar to those of Wigglesworth's “cuticulin.”
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    URL: http://dx.doi.org/10.1007/BF00987667
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  • 19
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    Sex pheromone of the armyworm,Pseudaletia unipuncta (Haworth) (Lepidoptera: Noctuidae) (1980)
    Springer
    Journal of chemical ecology 6 (1980), S. 565-572 
    Details
    ISSN: 1573-1561
    Keywords: Armyworm ; Mythimna unipuncta ; Pseudaletia unipuncta ; Leucania unipuncta ; Cirphis unipuncta ; Lepidoptera ; sex pheromone ; sex attractant ; (Z)-11-hexadecen-1-ol acetate ; (Z)-9-hexadecen-1-ol acetate ; hexadecan-1-ol acetate ; (Z)-11-hexadecen-1-ol
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology , Chemistry and Pharmacology
    Notes: Abstract (Z)-11-Hexadecen-1-ol acetate (Z11–16∶Ac) free of theE isomer (〈1%), hexadecan-1-ol acetate (16∶ Ac), and a hexadecen-1-ol [the (Z)-11 isomer based on the retention time on a Carbowax capillary column] were identified in extracts of the sex pheromone glands of adult virgin female armyworms,Pseudaletia unipuncta. Also, gas Chromatographic retention times on polar and nonpolar columns indicated the possible presence of (Z)-9-hexadecen-1-ol acetate (Z9–16∶Ac). The ratioZ11–16∶Ac/16∶Ac/Z11–16∶OH/Z9–16∶Ac was 1∶0.15∶0.13∶0.02. Infield testsZ11–16∶ Ac was attractive alone, and the addition ofZ9–16∶Ac,Zll–16 ∶ OH, or 16 ∶ Ac singly or in combination in ratios found in the gland did not increase trap capture.
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    URL: http://dx.doi.org/10.1007/BF00987668
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  • 20
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    Pyrazines as marking volatiles in philanthine and nyssonine wasps (Hymenoptera: Sphecidae) (1980)
    Springer
    Journal of chemical ecology 6 (1980), S. 827-835 
    Details
    ISSN: 1573-1561
    Keywords: Pyrazines ; 2,5-dimethyl-3-isopentylpyrazine ; marking volatiles ; mandibular gland ; philanthine wasp ; nyssonine wasp ; premating behavior ; Hymenoptera ; Sphecidae
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology , Chemistry and Pharmacology
    Notes: Abstract Males of several sphecid wasps apply volatile secretion on specific sites, perches. The odor is supposed to act in premating behavior as an attracting pheromone. There are strong indications that the scenting material is produced by the mandibular glands. One philanthine species,Philanthus triangulum, and three nyssonine ones,Argogorytes fargei, A. mystaceus, andNysson spinosus, the latter cleptoparasite onArgogorytes wasps, have been analyzed by gas chromatography-mass spectrometry. The major compound in the mandibular gland secretion of the four species was tentatively identified as 2,5-dimethyl-3-isopentylpyrazine. A few other pyrazines not yet identified were also found. Preliminary tests withP. triangulum show that alkylpyrazines influence male behavior.
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    URL: http://dx.doi.org/10.1007/BF00990406
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  • 21
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    Estimating western pine beetle-caused tree mortality for evaluating an attractive pheromone treatment (1980)
    Springer
    Journal of chemical ecology 6 (1980), S. 853-866 
    Details
    ISSN: 1573-1561
    Keywords: Ponderosa pine mortality ; Dendroctonus brevicomis ; Coleoptera ; Scolytidae ; aerial photography ; detection ; estimation ; sampling ; mapping ; attractive pheromones
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology , Chemistry and Pharmacology
    Notes: Abstract Sequential aerial photography was used to detect ponderosa pine trees killed by successive generations of the western pine beetle (WPB),Dendroctonus brevicomis Lec., over a three-year period during a study to evaluate the effectiveness of attractive pheromones for the suppression and survey of WPB. The total number of WPB-killed trees were estimated for each generation, using probability-proportional-to-size sampling procedures. Infested trees at the beginning of the suppression treatment totaled 283. Attacks by three successive WPB generations in 1970 killed 90,83, and 91 trees, respectively. The first generation in 1971 killed 47 trees and the two subsequent generations combined killed a total of 49 trees. During the suppression treatment, tree mortality was concentrated into the suppression plots in comparison to the check plots and the surrounding area. By 1972, tree mortality distribution returned to its original pattern, but at one-tenth the original level, as shown by maps. Recommendations suggest ways to improve the use of aerial photography for studies of WPB-caused tree mortality and population dynamics.
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    The pygidial gland and chemical recruitment communication inPachycondyla (=Termitopone)laevigata (1980)
    Springer
    Journal of chemical ecology 6 (1980), S. 883-893 
    Details
    ISSN: 1573-1561
    Keywords: Pachycondyla (= Termitopone) laevigata ; Hymenoptera ; Formicidae ; chemical communication ; termite predation ; pygidial gland
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology , Chemistry and Pharmacology
    Notes: Abstract Termite predation by the ponerine antPachycondyla (= Termitopone) laevigata is regulated by a recruitment trail pheromone which originates from the pygidial gland and not, as previously assumed, from the hindgut. The pygidial gland opens between the 6th and 7th abdominal terga and is associated with a distinct cuticular structure which obviously serves as a glandular applicator.
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    Fine structure of the compound eyes and interfacetal mechanoreceptors of Cicindela tranquebarica Herbst (Coleoptera: Cicindelidae) (1980)
    Springer
    Cell & tissue research 206 (1980), S. 123-138 
    Details
    ISSN: 1432-0878
    Keywords: Ultrastructure ; Sense organs ; Compound eyes ; Interfacetal mechanoreceptor ; Coleoptera
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology , Medicine
    Notes: Summary The structure of the compound eyes of adult Cicindela tranquebarica Herbst was examined by use of light, scanning, and transmission electron microscopy. Each ommatidium of these photopic eyes is eucone and has a “subcorneal layer” situated between the corneal lens and crystalline cone. A distal rhabdomere consisting only of microvilli from retinula cell seven, a more proximal, rectangular, fused rhabdom formed from six retinula cells, and a basal, eighth retinula cell with a spherical rhabdomere comprise the light sensitive portions of the ommatidium. The “subcorneal layer” consists of lamellae of endocuticular microfibrils and, in surface view, shows 11 concave polygons. Proximal extensions of the crystalline thread form inter-retinular fibres containing microtubules between retinula cells 1/2, 3/4, 5/6, and 7/1. The primary pigment cells are devoid of pigment granules, but are rich in rough endoplasmic reticulum. Proximal to each retinula cell nucleus are two basal bodies, one perpendicular to the other. The more proximal basal body extends two fibrillar feet proximally which fuse to form a horizontally-banded ciliary rootlet extending the length of the retinula peripheral to the rhabdom. Each ommatidium is surrounded by 16 secondary pigment cells. Interfacetal mechanoreceptors between some adjacent lenses each have a single bipolar neuron, with a dendritic sheath, tubular body, cilium, outer and inner sheath cells, and an axon surrounded by a neurilemma sheath cell.
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    Dry matter content and mineral composition of potatoes grown in Cyprus (1980)
    Springer
    Potato research 23 (1980), S. 371-375 
    Details
    ISSN: 1871-4528
    Keywords: nitrogen ; phosphorus ; potassium ; calcium ; sodium ; nitrate ; sulphate ; micronutrients
    Source: Springer Online Journal Archives 1860-2000
    Topics: Agriculture, Forestry, Horticulture, Fishery, Domestic Science, Nutrition
    Notes: Summary The specific gravity and dry matter content of 193 tuber samples (cultivars: Arran Banner, Spunta, Up-to-Date, Cara) from crops grown at Kokkinochoria, the major potato growing area of Cyprus, were related to each other as follows: Dry matter (%)=−269.59+268.24×specific gravity. This regression accounted for 82.4% of the variation; the fiducial limits (P〈0.05) for single determinations of specific gravity were±1.54 percentage units. The mineral contents of the tubers were similar to those reported in other countries.
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    Die digitiformen Sensillen auf dem Maxillarpalpus von Coleoptera (1980)
    Springer
    Protoplasma 103 (1980), S. 55-68 
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    ISSN: 1615-6102
    Keywords: Coleoptera ; Digitiform sensilla ; Sensilla structure
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology
    Notes: Summary The digitiform sensilla on the distal segment of the maxillar palps ofAgabus bipustulatus (L.) andHydrobius fuscipes (L.) were investigated by electron microscopic methods. Each sensillum is innervated by a single bipolar sensory cell. The sensilla ofHydrobius are associated with three enveloping cells, which enclose an inner and outer receptor lymph cavity. A single enveloping cell only is found in the completely differentiated sensilla ofAgabus. These sensilla do not form an outer lymph cavity. The area beneath the hair base is filled by the distal process of the enveloping cell and by extensions of epidermal cells. Only one extra-cellular space exists, which seems to be homologous to an inner receptor lymph cavity. The outer dendritic segment surrounded by a dendritic sheath runs to the tip of the hair shaft. In the hair shaft the outer dendritic segment divides into several branches. The poreless hair shaft does not rise over the surface of the cuticle, but it is positioned in a narrow shallow groove. Special socket structures or a tubular body do not exist. The digiti-form sensilla possess neither the typical feature of mechanosensitive, nor gustatory or olfactory sensilla. The functional significance of the structural divergences in the sensilla of both species and the presumed function of the sensilla are discussed referring to hygro- and thermo-receptors.
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    Optimized conditions for sex attractant trapping of male redbacked cutworm moths,Euxoa ochrogaster (Guenée) (1980)
    Springer
    Journal of chemical ecology 6 (1980), S. 585-591 
    Details
    ISSN: 1573-1561
    Keywords: Sex attractant ; trapping ; redbacked cutworm moth ; Euxoa ochrogaster ; Lepidoptera ; Noctuidae ; (Z)-5- and (Z)-7-dodecenyl acetates
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology , Chemistry and Pharmacology
    Notes: Abstract Mixtures of (Z)-5- and (Z)-7-dodecenyl acetates in ratios 〉100∶1 are powerful, specific sex attractants for redbacked cutworm male moths. Bioactive lures were produced by admixture of these pure compounds or through syntheses involving catalytic bond shifting. Best field trapping was obtained with 200∶1 (Z)-5∶(Z)-7 ratio, at lure doses (on rubber) of 0.1–2.0 mg, using cone swivel traps with 10- to 13-mm orifices, or Pherocon® 1-CP sticky traps, at a height of 50–90 cm. The pheromone traps were more efficient than large blacklight traps and captured the various morphological forms of the moth in similar ratios.
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    Sex pheromone of the woodbine leafroller moth,Sparganothis sp. (1980)
    Springer
    Journal of chemical ecology 6 (1980), S. 797-804 
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    ISSN: 1573-1561
    Keywords: Sex pheromone ; Sparganothis ; Lepidoptera ; Tortricidae ; (E)-11-tetradecen-1-ol ; (Z)-11-tetradecen-1-ol ; (E)-11-tetradecen-1-ylacetate ; (Z)-11-tetradecen-1-ylacetate
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology , Chemistry and Pharmacology
    Notes: Abstract The sex pheromone of the woodbine leafroller,Sparganothis sp., includes (E)-11-tetradecen-1-ol, (Z)-11-tetradecen-1-ol, and (E)-11-tetradecen-1-yl acetate, based on chemical analysis of gland extracts, electroantennogram tests, and field trapping. Highest trap catches were obtained when these compounds were dispensed in the relative proportions observed in the female gland. (Z)-11-Tetradecen-1-yl acetate also was found in gland extracts, but significantly reduced trap catches. The saturated compounds tetradecan-1-ol and tetradecan-1-yl acetate were found in gland extracts as well, but were not tested. The amounts of these compounds per female gland were 127, 93, 17, 20, 25, and 3 ng, in the order named.
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    Perception byTrogoderma species of chirality and methyl branching at a site far removed from a functional group in a pheromone component (1980)
    Springer
    Journal of chemical ecology 6 (1980), S. 911-917 
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    ISSN: 1573-1561
    Keywords: Trogoderma species ; trogodermal ; enantiomers ; chiral center ; geometric isomers ; methyl branching ; (Z)- or (E)-14-methyl-8-hexadecenal ; dermestid beetles ; Coleoptera ; Dermestidae ; pheromone ; chemoreception ; olfaction ; (Z)-hexadecenal
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology , Chemistry and Pharmacology
    Notes: Abstract Responses to enantiomers of (Z)- and (E)-trogodermal (14-methyl-8-hexadecenal) suggest that fourTrogoderma species utilize the (R)-(−) configuration at C-14. Removal of the C-14 methyl branch decreased the response. These results demonstrate the high specificity associated with the configuration at a chiral center, or the methyl branch, distant in terms of numbers of bonds from a functional group.
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    Models for dispersal of vapors in open and confined spaces: Applications to sex pheromone trapping in a warehouse (1980)
    Springer
    Journal of chemical ecology 6 (1980), S. 929-950 
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    ISSN: 1573-1561
    Keywords: Sex pheromone ; attractance ; behavioral threshold ; Plodia interpunctella ; Indian meal moth ; Lepidoptera ; Pyralidae ; orientation ; chemical communication
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology , Chemistry and Pharmacology
    Notes: Abstract Methods are presented for mathematically determining dispersal of a vapor in still air, in turbulent air of zero average velocity, and in turbulent or laminar air currents of constant, nonzero average velocity. The methods are combined with several assumptions about insect behavior to derive an insect attraction model that predicts: (1) In a warehouse a searching insect is likely to be attracted to a calling insect if it comes within an attraction sphere, 0.4–2.5 m in radius. (2) The attraction spaces of typical sex pheromone-baited traps that emit pheromone at rates greater than 0.01 ng/sec extend beyond the boundaries of a 10 × 10 × 10-m warehouse. (3) The searching behavior of an attracted insect is likely to be altered from an extensive to an intensive pattern if it comes within an altered-behavior sphere, 6–60 cm from a calling insect or within 10 m of a trap emitting 0.76 ng/sec. (4) Pheromone does not sink unless it is emitted along with a large amount of a high-vapor pressure solvent. The model is used in support of several hypotheses, including: (1) The effect of an adsorptive surface on the vapor concentration after an extended period of emission is negligible except at positions near the surface. (2) Sex pheromone-baited traps with sources of small dimensions have greater trapping efficiency than otherwise identical traps with sources of large dimensions.
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    Influence of chemically mediated behavior on host tree colonization by four cohabiting species of bark beetles (1980)
    Springer
    Journal of chemical ecology 6 (1980), S. 395-414 
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    ISSN: 1573-1561
    Keywords: Coleoptera ; Scolytidae ; bark beetle ; Dendrocionus ; Ips ; pheromone ; colonization ; attraction ; inhibition ; behavioral interaction
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology , Chemistry and Pharmacology
    Notes: Abstract Chemically mediated behavioral interactions among four species of Scolytidae cohabitingPinus taeda in east Texas appear to be significant in delineating breeding areas within trees and in influencing the sequence of colonization.Dendroctonus frontalis usually arrived first and was not attracted to logs occupied by any of the threeIps species (I. avulsus, I. calligraphus, andI. grandicollis). The response ofI. avulsus to conspecific males was enhanced by the simultaneous presence of actively boring maleI. grandicollis. The response ofIps calligraphus was inhibited in areas whereI. avulsus was also present, but, in turn,I. calligraphus inhibited the response ofI. grandicollis and attractedI. avulsus. Ips grandicollis was strongly inhibited by the simultaneous presence of femaleD. frontalis or maleI. calligraphus, and in turn, maleI. grandicollis inhibitedD. frontalis. The result of this highly interactive olfactory system is that host trees are colonized very rapidly and that, in the process, disadvantageous reproductive interactions are minimized.
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    Identification of sex pheromone components of redbacked cutworm,Euxoa ochrogaster, and modification of sex attractant blend for adult males (1980)
    Springer
    Journal of chemical ecology 6 (1980), S. 573-584 
    Details
    ISSN: 1573-1561
    Keywords: Electroantennographic detector ; Euxoa ochrogaster ; Lepidoptera ; identification ; mass chromatograms ; mass spectrometry ; redbacked cutworm ; sex pheromone ; (Z)-5-dodecenyl acetate ; (Z)-7-dodecenyl acetate ; (Z)-9-dodecenyl acetate
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology , Chemistry and Pharmacology
    Notes: Abstract Pheromone washes from calling female moths of redbacked cutworm,Euxoa ochrogaster (Guenée), contained the following acetates that are structurally similar to those of known lepidopteran pheromones (%): decanyl (8.7), dodecanyl (8.5), (E)-5-dodecenyl (3.3), (Z)-5-dodecenyl (76.4), (Z)-7-dodecenyl (3.1), and (Z)-9-dodecenyl (trace〈0.5%). This is the first time that (Z)-5-dodecenyl acetate has been identified as a pheromone component. Three types of specific receptor cells were found in the male antennae, and they responded to (Z)-5-decenyl acetate, (Z)-5- and (Z)-7-dodecenyl acetates, respectively. Strong electroantennographic detector responses were also recorded for these three acetates and for (Z)-5-undecenyl acetate. The evidence for the presence of (Z)-5-decenyl acetate in the pheromone washes was inconclusive. The presence of (Z)-7- and the absence of (Z)-8-dodecenyl acetates were confirmed by a special electroantennographic detector technique in which the detector antennae were from males of other species that were known to have strong responses to these acetates. This is a very useful technique. Field results show that low concentrations (0.1–1.3%) of (Z)-5-decenyl acetate were synergistic when tested in a previously reported blend, but 6% was inhibitory. Similarly, (Z)-7-dodecenyl acetate at 2% or less may be essential for the attraction of males, but in previous tests at 14% it also was inhibitory. Species-specific attractant blends for redbacked cutworm males are described.
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    Field responses of the western pine beetle1 and one of its predators to host- and beetle-produced compounds (1980)
    Springer
    Journal of chemical ecology 6 (1980), S. 625-641 
    Details
    ISSN: 1573-1561
    Keywords: Pinus ponderosa ; Dendroctonus brevicomis ; Temnochila chlorodia ; pheromone ; kairomone ; exo-bievicomm ; frontalin ; trans-ver-benol ; verbenone ; terpenes ; Coleoptera ; Scolytidae ; Trogositidae
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology , Chemistry and Pharmacology
    Notes: Abstract The responses of the western pine beetle (Dendroctonus brev-icomis LeConte) andTemnochila chlorodia (Mannerheim) to candidate attractants—exo- andendo-brevicomm, frontalin,trans-verbenol, ver-benone, and ponderosa pine turpentine and its major monoterpene components—were quantified by counts of beetles on traps baited with the various attractants, singly and in combinations released simultaneously. Combinations ofexo-brevicomin and frontalin plus a monoterpene or turpentine were the most attractive toD. brevicomis. The responses to these attractant combinations were reduced when verbenone plustrans-verbenol were present. All single compounds and binary mixtures, exceptexo-brevicomin plus frontalin, were much less attractive.exo-Brevicomin was most attractive toT. chlorodia, and this response appeared to decrease when verbenone plustrans-verbenol were present.
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    IPS pini: The basis for interpopulational differences in pheromone biology (1980)
    Springer
    Journal of chemical ecology 6 (1980), S. 677-687 
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    ISSN: 1573-1561
    Keywords: Ips pini ; Coleoptera ; Scolytidae ; aggregation pheromone ; ipsdienol ; interpopulational variation ; hybrid ; genetic control
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology , Chemistry and Pharmacology
    Notes: Abstract Ips pini from Idaho (ID) produce (−)-ipsdienol and respond to it in the laboratory.I. pini from New York (NY) produce (+) and (−)-ipsdienol in a 65∶35 ratio and respond much more strongly to the (+) than to the (−) enantiomer. Response byI. pini-ID to (−)-ipsdienol in the laboratory was inhibited by (+)-ipsdienol, while the field response byI. pini-NY was optimal to a 50:50 mixture of (+) and (−)-ipsdienol. This differential production and response to enantiomers of ipsdienol is sufficient to account for populational specificity observed in earlier experiments and confirmed by our current work. Reciprocal hybrids of the NY and IDI. pini populations did not differ in their patterns of attraction and response; those of both types of F1 were similar to NY beetles. Thus, it appears that (+)-ipsdienol is produced by the hybrids and is necessary for their maximum response, but this supposition was not tested. The genes controlling the pheromone biology ofI. pini are not sex linked. Since previous whole-antenna and single-cell electrophysiological data show that the receptor systems of the two populations are virtually identical, response behavior seems to be governed by the central nervous system rather than by the characteristics of the olfactory receptors.
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    Odor of a papilionid butterfly (1980)
    Springer
    Journal of chemical ecology 6 (1980), S. 867-873 
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    ISSN: 1573-1561
    Keywords: Male scent ; Atrophaneura alcinous ; Lepidoptera ; Papilionidae ; benzaldehyde ; phenylacetaldehyde ; 2-phenylpropenal ; n-heptanal ; 6-methylhept-5-en-2-one ; linalool
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology , Chemistry and Pharmacology
    Notes: Abstract Benzaldehyde, phenylacetaldehyde (major component), 2-phenylpropenal,n-heptanal, 6-methylhept-5-en-2-one, and linalool were identified as compounds responsible for the male scent ofAtrophaneura alcinous alcinous. These substances were present predominantly in the wings, and the quantity of them was largest at the inner margin of the hind wing. Female wings also contained some of them in much smaller (except a few components) amounts. The relative proportion of each component exhibited manifests sexual differences.
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    Mandibular gland allomones ofDasymutilla occidentalis and other mutillid wasps (1980)
    Springer
    Journal of chemical ecology 6 (1980), S. 895-903 
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    ISSN: 1573-1561
    Keywords: Dasymutilla occidentalis ; Dasymutilla ; Timulla ; Pseudomethoca ; Smicromyrme ; Traumatomutilla ; Pappognatha ; Hymenoptera ; Mutillidae ; 4-methyl-3-heptanone ; 4,6-dimethyl-3-nonanone ; 4,6-dimethyl-3-octanone ; allomones
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology , Chemistry and Pharmacology
    Notes: Abstract The mandibular gland secretion of the mutillid wasp,Dasymutilla occidentalis, possesses three short-chained ketones-4-methyl-3-heptanone (4MH), 4,6-dimethyl-3-nonanone (4,6DMN), 4,6-dimethyl-3-octanone (4,6DMO)—and several unidentified compounds. This is the first report of 4,6DMN as a natural product and its synthesis is described. These ketones, which are either known to be ant alarm pheromones or are structurally very similar to ant alarm pheromones, appear to function as allomones against ants, major potential predators of mutillid wasps. The major secretory component, 4-methyl-3-heptanone, which was identified in females and/ or males of the species analyzed within the generaDasymutilla, Timulla, Traumatomutilla, andPappognatha, appears to constitute a chemical character of the defensive secretions of these genera.
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    Anemotactic response threshold of the Indian meal moth,Plodia interpunctella (Hübner) (Lepidoptera: Pyralidae), to its sex pheromone (1980)
    Springer
    Journal of chemical ecology 6 (1980), S. 919-928 
    Details
    ISSN: 1573-1561
    Keywords: Sex pheromone ; anemotaxis ; Plodia interpunctella ; Lepidoptera ; Pyralidae ; behavioral threshold ; behavioral alteration threshold ; (Z,E)-9,12-tetradecadien-1-ol acetate ; Indian meal moth
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology , Chemistry and Pharmacology
    Notes: Abstract The effect of different concentrations of the sex pheromone (Z,E)-9,12-tetradecadien-1-ol acetate on the upwind anemotactic behavior of the malePlodia interpunctella (Hübner) was measured at 23 ± 1 ° C and 34 ± 1 ° C. The stimulus-response regression lines were analyzed by a new procedure that accounts both for control responses in the absence of pheromone and also for peak responses below 100% in the presence of concentrations considerably above the normal physiological levels. From the regression line for each temperature, the upwind anemotactic thresholds were calculated to be 1.34 × 106 molecules/cm3 at 23 ° C and 1.65 × 104 molecules/cm3 at 34 ° C, similar to other thresholds reported in the literature. Since departures from the two lines occurred at the highest concentrations tested, near 108 molecules/cm3, the upwind anemotactic behavior may change qualitatively above an altered-behavior threshold that is about two orders of magnitude higher than the upwind anemotactic threshold. The lower response at 23 ° C suggests that cool temperatures inhibit flight in response to pheromonal stimulation.
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    Effects of verbenone andtrans-verbenol on the response ofDendroctonus brevicomis to natural and synthetic attractant in the field (1980)
    Springer
    Journal of chemical ecology 6 (1980), S. 997-1013 
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    ISSN: 1573-1561
    Keywords: Pinus ponderosa ; Dendroctonus brevicomis ; verbenone ; trans-verbenol ; tree protection ; bark beetle ; pheromones ; interruptant ; Coleoptera ; Scolytidae
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology , Chemistry and Pharmacology
    Notes: Abstract Verbenone andtrans-verbenol were investigated as candidate interruptants for use as tree protectants. Verbenone andtrans-verbenol, pheromones released byDendroctonus brevicomis during host colonization, reduced the trap catch ofD. brevicomis near sources of the attractant composed ofexo-brevicomm, frontalin, and myrcene. Catch reduction at some trap positions was greater at a high release rate than at a low release rate oftrans-verbenol alone and of the combination of verbenone plustrans-verbenol. Verbenone also reduced catches at traps baited with attractive bolts from trees under attack byD. brevicomis. Attempts to use verbenone to protect living trees fromD. brevicomis attack were inconclusive.
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    Annual changes of nitrogen and phosphorus in two aquatic macrophytes (Nymphaea Tuberosa and Ceratophyllum Demersum) (1980)
    Springer
    Hydrobiologia 70 (1980), S. 31-35 
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    ISSN: 1573-5117
    Keywords: macrophyte ; nitrogen ; phosphorus ; nutrients
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology
    Notes: Abstract The nitrogen and phosphorus content of Nymphaea tuberosa and Ceratophyllum demersum, in Lake Onalaska, Wisconsin, was studied for a year. On a yearly basis, N. tuberosa exhibited nitrogen and phosphorus differences among seasons and among plant parts. Variation among plant parts was also evident in C. demersum. However, within individual plant structures, no seasonal differences were observed.
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    Male scent-producing structures inColias butterflies (1980)
    Springer
    Journal of chemical ecology 6 (1980), S. 13-26 
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    ISSN: 1573-1561
    Keywords: Butterfly ; Colias philodice ; chemical communication ; Lepidoptera ; Pieridae ; male scent ; courtship ; sex brands
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology , Chemistry and Pharmacology
    Notes: Abstract During successful courtship in sulfur butterflies, virgin females respond to males by assuming a stationary posture and extending the abdomen ventrally from between the hindwings, thereby permitting copulation. In the clouded sulfur,Colias philodice Godard, this response was used in a laboratory bioassay to confirm the existence of a male chemical signal demonstrated by a previous worker and to document the signal's behavioral function and source. The male scent is shown to be required, in part, to reliably elicit abdominal extension and to be emitted from a patch of cells and scales associated with the dorsal surface of the male hind wing near the wing base. Experiments also show that evaporation of the signal is reduced when the source is covered by the forewing as it is at rest and in flight. These data, coupled with other information on male chemical signals in sulfur butterflies and other Lepidoptera, suggest that in sulfurs the morphology and chemistry of the scent glands along with the behavior of the male are structured in a way that minimizes the evaporative loss of scent from the wings when the male is not courting females.
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    URL: http://dx.doi.org/10.1007/BF00987523
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  • 40
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    Lesser peachtree borer: Influence of pheromone concentration, isomeric blend, and experimental design on trap capture (1980)
    Springer
    Journal of chemical ecology 6 (1980), S. 361-369 
    Details
    ISSN: 1573-1561
    Keywords: Sex attractant ; sex pheromone ; lesser peachtree borer ; field test design ; Synanthedon pictipes ; clearwing moths ; Lepidoptera ; Sesiidae
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology , Chemistry and Pharmacology
    Notes: Abstract Trap capture data from Ohio and Wisconsin show that (E,Z)-3-13-octadecadien-1-ol acetate alone is an effective trap bait for maleSynanthedon pictipes (Grote and Robinson). Attractiveness increased by increasing attractant concentration but not by adding theZ,E geometrical isomer.S. pictipes males partitioned themselves in a linear fashion among traps baited with 10–100 μg of attractant in 10-μg increments. Furthermore, they discriminated between 50- and 100-μg baits placed in the same tree. These and other results indicate that, in clearwing experiments involving noninhibitory compounds and blend tuning, high trap density can be used successfully.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF01402914
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  • 41
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    Pharmacodynamics of some individual milkweed cardenolides fed to larvae of the monarch butterfly (Danaus plexippus L.) (1980)
    Springer
    Journal of chemical ecology 6 (1980), S. 321-339 
    Details
    ISSN: 1573-1561
    Keywords: Cardenolides ; monarch butterfly ; Danaus plexippus L. ; Lepidoptera ; Danaidae ; storage ; regulation ; metabolism ; uscharidin ; calactin ; calotropin ; uzarigenin ; digitoxigenin
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology , Chemistry and Pharmacology
    Notes: Abstract Adult monarch butterflies,Danaus plexippus L. (Lepidoptera: Danaidae), store only some of the cardenolides present in the larval milkweed (Asclepiadaceae) host. Feeding known doses of individual cardenolides to 4th instar monarch larvae led to more efficient larval tissue incorporation at low doses than at high ones, and favored storage of cardenolide glycosides over genins. A qualitative regulation also occurs during larval feeding; calactin and calotropin were stored as such but uscharidin was rapidly converted to a mixture of calactin and calotropin which were the forms stored by the larvae. Two genins, uzarigenin and digitoxigenin, were stored by larvae as polar cardenolide metabolites.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF01402911
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  • 42
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    Estimation of single furniture carpet beetle (Anthrenus flavipes LeConte) sex pheromone release by dose-response curve and chromatographic analysis of pentafluorobenzyl derivative of (Z)-3-decenoic acid (1980)
    Springer
    Journal of chemical ecology 6 (1980), S. 597-607 
    Details
    ISSN: 1573-1561
    Keywords: Furniture carpet beetle ; Anthrenus flavipes ; Coleoptera ; dermestid beetle ; sex pheromone ; (Z)-3-decenoic acid ; aeration apparatus ; Tenax ; gas chromatography ; pentafluorobenzyl bromide ; pheromone release rate
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology , Chemistry and Pharmacology
    Notes: Abstract A single-insect aeration apparatus was designed for the study of the pheromone release rate of furniture carpet beetlesAnthrenus flavipes LeConte. Tenax® was selected as the pheromone adsorption agent. The quantity of (Z)-3-decenoic acid (A. flavipes female pheromone) produced per day was estimated by a dose-response curve and bioassay of the collected pheromone. A procedure was established to quantitatively determine the furniture carpet beetle pheromone involving pentafluoro-benzylation of (Z)-3-decenoic acid and subsequent gas chromatographic analysis utilizing flame-ionization and electron-capture detectors.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00987672
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  • 43
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    A trail pheromone from silk produced by larvae of the range caterpillarHemileuca oliviae (Lepidoptera: Saturniidae) and observations on aggregation behavior (1980)
    Springer
    Journal of chemical ecology 6 (1980), S. 655-664 
    Details
    ISSN: 1573-1561
    Keywords: Range caterpillar ; Hemileuca oliviae ; Lepidoptera ; Saturniidae ; trail pheromone ; aggregation
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology , Chemistry and Pharmacology
    Notes: Abstract Methylene chloride-extractable chemical(s) from range caterpillar larval silk facilitates trail-following and aggregation by early-instar larvae, but late-instar larvae are less responsive to the pheromone. Larval aggregation does not reduce water loss when larvae are exposed to low humidity, nor does aggregation prevent predation by the antFormica neoclara Emery. Grouped larvae gain weight and complete early stadia more rapidly as compared to solitary larvae. Aggregation may provide increased visibility to herbivores and increase the impact of urticating spines, thereby decreasing inadvertant predation.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00987676
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  • 44
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    Dodecyl acetate, a second pheromone component of the cabbage looper moth,Trichoplusia ni (1980)
    Springer
    Journal of chemical ecology 6 (1980), S. 727-734 
    Details
    ISSN: 1573-1561
    Keywords: Dodecyl acetate ; sex pheromone ; Trichoplusia ni ; Lepidoptera ; Noctuidae
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology , Chemistry and Pharmacology
    Notes: Abstract Dodecyl acetate was identified as a second component of the sex pheromone ofTrichoplusia ni (Hübner). Dodecyl acetate comprised 9.6% by weight of the total pheromone [(Z)-7-dodecenyl acetate plus dodecyl acetate] extracted from glands and 7.3% by weight of the total pheromone evaporated from the surfaces of glands. Dodecyl acetate appears to function as a short-range pheromone component. Evaporation at female release rates of a 10∶90 mixture of dodecyl acetate and (Z)-7-dodecenyl acetate in the field caused a significantly greater percentage of males to land on the pheromone source, increased significantly the time they spent on the source, but decreased significantly the time they spent searching for the source when within 50 cm, as compared to (Z)-7-dodecenyl acetate alone.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00990397
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  • 45
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    Selection of a polyethylene tubing formulation of (Z)-9-tetradecen-1-ol formate and its use in disrupting pheromone communication inHeliothis zea (Boddie) (1980)
    Springer
    Journal of chemical ecology 6 (1980), S. 771-779 
    Details
    ISSN: 1573-1561
    Keywords: Release rate ; polyethylene ; formulations ; controlled release ; (Z)-9-tetradecen-1-ol formate ; Heliothis zea ; Lepidoptera ; Noctuidae
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology , Chemistry and Pharmacology
    Notes: Abstract The release rates of (Z)-9-tetradecen-1-ol formate (Z9TDF) from four sizes of polyethylene tubing were measured periodically for 50 days by collecting the Z9TDF vapors on a polymeric adsorbent. The resulting release rate curves had shapes that were determined by the tubing's diameter and wall thickness. One tubing size that combined good longevity with adequately high release rates was tested in the field to determine whether it could disrupt pheromone communication of the corn earworm,Heliothis zea (Boddie). We observed a low percentage of disruption, but release rate measurements made concurrently showed that the tubing was releasing Z9TDF normally. In a second field test, a larger quantity of Z9TDF was released, and 87% disruption was attained for 66 days.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00990401
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  • 46
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    A stereological analysis of developing egg chambers in the honeybee queen, Apis mellifera (1980)
    Springer
    Cell & tissue research 208 (1980), S. 29-33 
    Details
    ISSN: 1432-0878
    Keywords: Hymenoptera ; Honeybee ; Apis ; Ovarian development
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology , Medicine
    Notes: Summary A polytrophic ovariole of the queen honeybee, Apis mellifera, is composed of a linear series of increasingly mature egg chambers, each consisting of an oocyte, an interconnected cluster of nurse cells, and a covering layer of follicle cells. This study describes changes in the volume of each of these components, as a function of the position of the egg chamber in the ovariole. An oocyte increases in volume from approximately 8.9 × 103 μm3 to approximately 9.6 × 106 μm3 over an average series of 20 egg chambers.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00234170
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