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  • 1
    Electronic Resource
    Electronic Resource
    Preparation of nanocrystal SiC powder by chemical vapour deposition (1996)
    Springer
    Journal of materials science 31 (1996), S. 4327-4332 
    Details
    ISSN: 1573-4803
    Source: Springer Online Journal Archives 1860-2000
    Topics: Mechanical Engineering, Materials Science, Production Engineering, Mining and Metallurgy, Traffic Engineering, Precision Mechanics
    Notes: Abstract Nanosized silicon carbide powders of high purity and low oxygen content have been prepared by thermal chemical vapour deposition (CVD) of dimethyldichlorosilane at pyrolytic temperatures, 1100–1400 °C. The nanosized silicon carbide particles prepared at 1400 °C consist of small crystallites of β-SiC arranged randomly in the particles. At pyrolytic temperature below 1300 °C, the particles consist of amorphous phase and β-type SiC crystallites. The average particle size changed from 70 nm to 40 nm and the average size of the β-SiC crystallite changed from 7.3 nm to 1.8 nm depending on the pyrolysis conditions. The C/Si molar ratios of the product powders changed from 0.5 to 1.07 with the CVD conditions. The near theoretical values of C/Si molar ratio of the product powders within 0.95–1.05 can be controlled by CVD conditions such as pyrolytic temperature and reactant concentration. Finally, the product powders were characterized by chemical analysis, X-ray diffraction, electron microscopy, and infrared spectroscopy.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00356457
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  • 2
    Electronic Resource
    Electronic Resource
    Sex pheromone chemistry of the western spruce budwormChoristoneura occidentalis Free (1982)
    Springer
    Journal of chemical ecology 8 (1982), S. 351-362 
    Details
    ISSN: 1573-1561
    Keywords: Choristoneura occidentalis ; western spruce budworm ; Lepidoptera ; Tortricidae ; pheromone chemistry ; Choristoneura fumiferana ; capillary GC-MS ; (E/Z)-11-tetradecenal
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology , Chemistry and Pharmacology
    Notes: Abstract SCOT capillary Chromatographic and SCOT capillary chromatographic-mass spectrometic analyses of gland washes and effluvia of virgin femaleChoristoneura occidentalis Free, have been conducted with both a diapausing and nondiapausing strain of this insect. The following compounds were identified in gland washes and effluvia in both strains:E andZ11–14∶Ald,E andZ11–14∶Ac,E andZ11–14∶OH and 14∶Ald, 14∶Ac, and 14∶OH. The average aldehyde: acetate: alcohol ratio found by analysis of single glands by virgin females (nondiapausing strain) was 1∶7∶0.73. Analysis of virgin female effluvia gave this ratio as 10∶3∶8 (diapausing strain: %Z=8, 11, 15, respectively) and 10∶3∶6 (nondiapausing strain: %Z=8, 11, 12, respectively). The saturated components were generally 1–2% of theE isomer in each case. Comparisons of EAG responses of bothC. occidentalis andC. fumiferana toE11–14∶Ald,E11–14∶Ac andE11–14∶OH were made. Correlations with both laboratory and field data previously published were also made betweenC. fumiferana andC. occidentalis.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00987783
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  • 3
    Electronic Resource
    Electronic Resource
    Identification of sex pheromone components of jack pine budworm,Choristoneura pinus pinus freeman (1985)
    Springer
    Journal of chemical ecology 11 (1985), S. 159-167 
    Details
    ISSN: 1573-1561
    Keywords: Choristoneura pinus pinus ; jack pine budworm ; Lepidoptera ; Tortricidae ; (E,Z)-11-tetradecenyl acetate ; (E,Z)-11-tetradecen-1-ol ; sex pheromone ; sex attractant
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology , Chemistry and Pharmacology
    Notes: Abstract Chemical identification and field-trapping experiments have shown that a blend of 85∶15 (E,Z)-11-tetradecenyl acetates and 85∶15 (E,Z)-11-tetradecen-1-ols (in a 9∶1 ratio) are female sex pheromone components for jack pine budworm,Choristoneura pinus pinus. This blend of chemicals, formulated in PVC (0.1 %, w/w) sources is as effective a trap bait as virgin females. Preliminary wind tunnel observations have indicated that this blend, effective as a trap bait, is not equivalent to females.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00988198
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  • 4
    Electronic Resource
    Electronic Resource
    Chemical identification and behavioral characterization of male wing pheromone ofEphestia elutella (Pyralidae) (1986)
    Springer
    Journal of chemical ecology 12 (1986), S. 135-146 
    Details
    ISSN: 1573-1561
    Keywords: courtship pheromone ; wing pheromone ; male pheromone ; Ephestia elutella ; Pyralidae ; phytol ; γ-decalactone ; γ-undecalactone
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology , Chemistry and Pharmacology
    Notes: Abstract Behavioral and chemical evidence is presented for the identity of the male wing pheromone ofEphestia elutella (Hübner) and the role of this pheromone in courtship success is evaluated. Males with the forewing removed experienced a mating success rate less than half of that of either intact males or males that had only the wing gland area remaining of their forewings. GC-MS analysis and microchemical reactions indicated the presence of (E)-phytol and a series of saturated γ-lactones in a methylene chloride extract of the wings. Using an assay of female courtship behavioral response, (E)-phytol was found to evoke an intermediate level of response in females when presented alone, while the complete array of insect-derived γ-lactones produced no significant response. The combination of either γ-decalactone or γ-undecalactone with (E)-phytol in a 1∶2 ratio, however, elicited a female response equivalent to that produced by the unfractionated wing extract.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF01045597
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  • 5
    Electronic Resource
    Electronic Resource
    Double-bond location in monounsaturated fatty acids by dimethyl disulfide derivatization and mass spectrometry: Application to analysis of fatty acids in pheromone glands of four lepidoptera (1985)
    Springer
    Journal of chemical ecology 11 (1985), S. 265-277 
    Details
    ISSN: 1573-1561
    Keywords: Fatty acid analysis ; double-bond location ; dimethyl disulfide adducts ; mass spectrometry ; pheromone ; Choristoneura fumiferana ; C. occidentalis ; C. pinus pinus ; Plusia chalcites ; Lepidoptera ; Tortricidae ; Noctuidae
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology , Chemistry and Pharmacology
    Notes: Abstract A rapid analytical procedure for the determination of the position of double bonds in mixtures of monounsaturated fatty acid methyl esters has been developed. The method is based on direct capillary GC-MS-EI analysis of dimethyl disulfide adducts. The procedure was applied to mixtures of monounsaturated fatty esters from pheromone gland extracts of three tortricids from theChoristoneura genus,C. fumiferana, C. occidentalis, andC. pinus pinus, and one noctuid from the Plusiinae subfamily,Plusia chalcites. A correlation was found between the known major pheromone components in the four species with the corresponding fatty acids. Some of the additional fatty acids may be precursors to as yet unidentified minor pheromone components, present in extremely small quantities, in these species.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF01411414
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  • 6
    Electronic Resource
    Electronic Resource
    Olfactory responses of the parasitoidDiaeretiella rapae (Hymenoptera: Aphidiidae) to odor of plants, aphids, and plant-aphid complexes (1995)
    Springer
    Journal of chemical ecology 21 (1995), S. 407-418 
    Details
    ISSN: 1573-1561
    Keywords: Kairomone ; biological control ; cabbage ; wheat ; Diuraphis noxia ; Brevicoryne brassicae ; olfactometer ; infochemical ; preference ; host plants
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology , Chemistry and Pharmacology
    Notes: Abstract Diaeretiella rapae (M'Intosh) (Hymenoptera: Aphidiidae) is a parasitoid of several aphid species, including the Russian wheat aphid (RWA),Diuraphis noxia (Mordvilko), and the cabbage aphid (CA).Brevicoryne brassicae (L.). The response of matedD. rapae females to odors from wheat, cabbage, and plant-host complexes was investigated using a four-choice olfactometer. Experienced parasitoids, but not inexperienced females, responded positively to odors of the wheat-RWA complex in a no-choice test. In choice tests, experienced parasitoids did not respond to odors of uninfested cabbage and wheat leaves, but did respond positively to aphid-infested plants and to aphids alone. The response ofD. rapae to the cabbage-CA complex and to CA alone was significantly greater than to the wheat-RWA complex and RWA alone, suggesting an innate odor preference for crucifer-feeding aphids.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF02036738
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  • 7
    Electronic Resource
    Electronic Resource
    The freshwater crab fauna (Crustacea: Brachyura) of the Philippines. V. On a new genus and species of potamid from Palawan island, Philippines (1998)
    Springer
    Hydrobiologia 379 (1998), S. 93-96 
    Details
    ISSN: 1573-5117
    Keywords: Potamidae ; Carpomon pomulum ; taxonomy ; new genus ; new species ; Philippines
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology
    Notes: Abstract A new genus and new species of terrestrial potamid crab ( Carpomon pomulum) is described from the island of Palawan in the Philippines. This new genus can easily be distinguished from all other Philippine potamids in its smooth and inflated carapace, no trace of an epibranchial tooth, extremely low postorbital cristae, and stout and twisted male first gonopod.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1023/A:1003462104099
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  • 8
    Electronic Resource
    Electronic Resource
    Konduktometrische Titrationen in Anwesenheit einer hohen Konzentration von Fremdelektrolyt (1962)
    Springer
    Fresenius' Zeitschrift für analytische Chemie 186 (1962), S. 201-206 
    Details
    ISSN: 1618-2650
    Source: Springer Online Journal Archives 1860-2000
    Topics: Chemistry and Pharmacology
    Notes: Zusammenfassung Bei konduktometrischen Titrationen mit Niederfrequenz in Anwesenheit einer hohen Konzentration von Fremdelektrolyt ist nicht nur die genaue Messung der geringen Leitfähigkeitsänderungen von großer Wichtigkeit, sondern auch die Ausschaltung der Polarisationserscheinungen. Zu diesem Zweck wurden Titrationszellen mit großen Zellkonstanten (z. B. 2000 cm−1), ausgestattet mit blanken Platinelektroden, konstruiert, in denen verschiedene Titrationen in konzentrierten Salzlösungen erfolgreich ausgeführt wurden. Dabei wurde ein Dehnungsmesser zur Messung der-Leitfähigkeitsänderungen benutzt.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00465516
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  • 9
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    Quantum yield of the marine benthic microflora of near-shore coastal Penang, Malaysia (2005)
    In:  EPIC3Marine and Freshwater Research, 56(7), pp. 1047, ISSN: 1323-1650
    Details
    Publication Date: 2019-07-17
    Description: Benthic microalgal communities often contribute more than 30% of the primary production of shallow coastal and estuarine areas. At Muka Head Penang (Pulau Pinang) and the Songsong Islands (Pulau Songsong), Kedah, Malaysia, high concentrations of suspended solids and phytoplankton biomass (10.6 mg Chl a m-3) has reduced water clarity such that the euphotic zone of these areas is less than 2 m and 3 m deep respectively. The benthic microalgal communities, which were composed of the diatom genera Cocconeis, Fragilaria, Paralia and Pleurosigma, had a low biomass, had low maximum quantum yields (0.325 ± 0.129), were poorly adapted to their light environment and were constantly light limited. These characteristics suggest that the benthic microalgal communities were likely to have made only a minor contribution to the total primary production of the area.
    Repository Name: EPIC Alfred Wegener Institut
    Type: Article , isiRev
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  • 10
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    Effectiveness of frequency mapping on 28 nm device broken scan chain failures (2012)
    American Institute of Physics
    Details
    Publication Date: 2012-02-01
    Print ISSN: 0034-6748
    Electronic ISSN: 1089-7623
    Topics: Electrical Engineering, Measurement and Control Technology , Physics
    Published by American Institute of Physics
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    PAPER CURRENT
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