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  • 1
    Electronic Resource
    Electronic Resource
    Acyclic diene metathesis (ADMET) polymerization (1991)
    s.l. : American Chemical Society
    Macromolecules 24 (1991), S. 2649-2657 
    Details
    ISSN: 1520-5835
    Source: ACS Legacy Archives
    Topics: Chemistry and Pharmacology , Physics
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1021/ma00010a001
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  • 2
    Electronic Resource
    Electronic Resource
    Acyclic diene metathesis copolymerization of 1,5-hexadiene and 1,9-decadiene (1990)
    s.l. : American Chemical Society
    Macromolecules 23 (1990), S. 5155-5157 
    Details
    ISSN: 1520-5835
    Source: ACS Legacy Archives
    Topics: Chemistry and Pharmacology , Physics
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1021/ma00226a022
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  • 3
    Electronic Resource
    Electronic Resource
    Aggressive behaviour of the harvester termitesHodotermes mossambicus (Hagen) andTrinervitermes trinervoides (Sjöstedt) (1968)
    Springer
    Insectes sociaux 15 (1968), S. 145-156 
    Details
    ISSN: 1420-9098
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology
    Description / Table of Contents: Zusammenfassung 1. Einzelne männliche und weibliche Tiere und Paare der primären Geschlechtstieren derH. mossambicus entwickelten stark agressive Reaktionen gegen einander, nachdem sie etwa 24 Stunden isoliert gewesen waren. Der Grad der Reaktion richtete sich nach der Dauer der Isolierung. Die Temperatur hatte keinen nennenswetten Einfluss auf die Reaktion, während die Tätigkeit des Grabens im Erdboden die Reaktion verstärkte. 2. Kolonien derH. mossambicus im Labor waren nur leicht aggressiv, während die Feldarbeiter von unterschiedlichen Kolonien stark agressiv waren. Das agressive Verhalten der Feldarbeiter gab die Handhabe, um den Flächeninhalt des Gebietes, worauf sich die Ernährung der Kolonie stützt, zu bestimmen. Man fand, dass der Flächeninhalt der Gebiet von 12 Kolonien durchschnittlich etwa 1,000 Quadratfuss- 93 Quadratmeterbetrug. 3. Beim Vermengen von 4 Laborkolonien derH. mossambicus behielt die daraus entstehende Kolonie nur 1 Paar Geshlechtstieren und vernichtete die andern. 4. Kolonien derT. trinervoides, die auf dem Feld gesammelt wurden, kämpften bis zum Tode im Labor. Arbeiter griffen Arbeiter an in Ermangelung von Soldaten und umgekehrt. 5. Arbeiter und Soldaten derH. mossambicus wurden nicht von den Soldaten derT. trinervoides angegriffen, obwohl beide Gattungen kämpften und viele Einzeltiere getötet wurden, wenn sie zwangsweise vermengt wurden.
    Notes: Summary 1. Individual males, females and pairs of primary reproductives ofH. mossambicus developed strong aggressive reactions to each other after being isolated for approximately 24 hours. The intensity of the reactions was a function of the isolation period. Temperature had no significant influence on the reaction while digging in the soil intensified the reaction. 2. Laboratory colonies ofH. mossambicus were only slightly aggressive but field workers from different colonies were strongly aggressive. Use was made of the aggressive behaviour of field workers to determine the area of the foraging territory of a colony. The mean area of 12 colonies was found to be about 1 000 ft2. 3. When four laboratory colonies ofH. mossambicus were allowed to coalesce, the resulting colony retained only one pair of reproductives and destroyed the others. 4. T. trinervoides colonies collected in the field fought to the death in the laboratory. Workers attacked workers in the absence of soldiers and vice versa. 5. H. mossambicus workers and soldiers were not attacked byT. trinervoides soldiers although the two species fought and many individuals were killed when they were forcibly mixed.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF02223463
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  • 4
    Electronic Resource
    Electronic Resource
    The uptake of water by eggs of the termiteHodotermes mossambicus (Hagen) (Isoptera) (1971)
    Springer
    Insectes sociaux 18 (1971), S. 233-241 
    Details
    ISSN: 1420-9098
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology
    Description / Table of Contents: Zusammenfassung Die befruchteten Eier vonHodotermes mossambicus nahmen während der letzten 15–16 Tage der 24–25 tägigen Inkubationsperiode Wasser auf. Sowohl die grossen Eier aus jungen Kolonien als auch die kleinen Eier aus 1-jährigen Kolonien verdoppelten in etwa ihr Gewicht. Unbefruchtete Eier, von denen nur 50 % nach 14 Tagen am Leben blieben, nahmen langsamer Wasser auf. Die Aufnahme von Wasser in den Eieren erfolgte in Berühring mit Flüssigkeit. Bei nicht ganz gesättigter Luftfeuchtigkeit versorgten die Geschlechtstiere die Eier mit Flüssigkeit aus ihren Speicheldrüsen, dagegen konnten die Eier bei Kontakt mit Flüssigkeit auch in Abwesenheit der Geschlechtstiere ihren Wassergehalt aufrecht erhalten. Trotzdem mussten auch bei Kontakt mit Wasser die Geschlechtstiere die Eier versorgen, um deren Ueberleben zu gewährleisten.
    Notes: Summary Fertilized eggs ofHodotermes mossambicus took up water progressively during the last 15–16 days of the 24–25 day incubation period. Both the large eggs from founding pairs and the small eggs from mature colonies approximately doubled in weight. Infertile eggs, 50% of which survived for 14 days, showed a lower rate of water uptake. The eggs could take up water when they were in contact with the liquid. Under subsaturated conditions, the reproductives provided the liquid while tending the eggs, but in contact with free water the eggs could still maintain their water balance in the absence of the reproductives. However, tending was essential for the eggs to survive, even in the presence of free water.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF02223178
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  • 5
    Electronic Resource
    Electronic Resource
    The rôle of chemicals in communication in the harvester termitesHodotermes mossambicus (Hagen) andTrinervitermes trinervoides (Sjöstedt) (1969)
    Springer
    Insectes sociaux 16 (1969), S. 79-86 
    Details
    ISSN: 1420-9098
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology
    Notes: Abstract The components of trail-laying and trailfollowing behaviour in the harvester termitesHodotermes mossambicus (Hagen) andTrinervitermes trinervoides (Sjöstedt) were investigated. In both species the trails are laid by pressing the third to sixth abdominal segments against the substratum. The trails are detected by olfactory receptors which are found on the antennae—principally on the distal one third.H. mossambicus trails andT. trinervoides trails laid on paper persisted for approximately 90 and 20 minutes respectively at 23° C±1° C. T. trinvervoides trail substances were steam volatile, but steam distillates ofH. mossambicus individuals were inactive. Ethanol or diethyl ether extracts ofH. mossambicus were, however, active. The volatile components of the secretions of the nasuteT. trinervoides soldiers were collected by drawing an air shtream over fighting colonies and passing it through gas scrubbing bottles containing appropriate solvents.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF02224466
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  • 6
    Electronic Resource
    Electronic Resource
    Preliminary studies on the control of caste formation in the harvester termiteHodotermes mossambicus (Hagen) (1969)
    Springer
    Insectes sociaux 16 (1969), S. 159-172 
    Details
    ISSN: 1420-9098
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology
    Notes: Abstract The control of caste formation in the harvester termiteHodotermes mossambicus (Hagen) was investigated. Normal laboratory colonies contained a primary reproductive pair, between 6.59 and 24.98% workers, 0.39 and 3.45% soldiers and 74.64 and 92.06% larvae. Supplementary reproductives did not develop in colonies deprived of their king and queen. Continuous removal of soldiers stimulated soldier production. We have suggested that a pheromone produced by the soldiers plays a major role in controlling the soldier population of a colony. A similar phermone system appreared to control the production of workers. Evidence was also obtained that the primary reproductive pair influenced the production of workers and soldiers.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF02223407
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  • 7
    Electronic Resource
    Electronic Resource
    Effect of Solar Radiation on the Harvester Termite, Hodotermes mossambicus (Hagen) (1969)
    [s.l.] : Nature Publishing Group
    Nature 223 (1969), S. 862-863 
    Details
    ISSN: 1476-4687
    Source: Nature Archives 1869 - 2009
    Topics: Biology , Chemistry and Pharmacology , Medicine , Natural Sciences in General , Physics
    Notes: [Auszug] The harvester termite (Hodotermes mossambicus) is widespread in the semi-arid regions of South Africa. About 15 per cent3 of the individuals in a colony are darkly pigmented with black heads (adults) while the bulk of the colony are unpigmented and have a translucent appearance (larvae). All the ...
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1038/223862a0
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  • 8
    Electronic Resource
    Electronic Resource
    Determination of the sputtering rate of electroless nickel layers with a glow discharge lamp (1990)
    Chichester [u.a.] : Wiley-Blackwell
    Surface and Interface Analysis 15 (1990), S. 598-602 
    Details
    ISSN: 0142-2421
    Keywords: Chemistry ; Polymer and Materials Science
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Physics
    Notes: Grimm glow discharge spectrometry was used to analyse electroless nickel coatings on a steel substrate. Because of poor depth resolution at the coating/metal interface, it was necessary to determine the sputtering rate of the layer itself at different power settings and to calculate the sputtering rate per power unit. The penetration time for layers with different thicknesses was also determined for different power settings. By comparing sputtering rates per power unit, it was found that the best results were obtained if the penetration time was equated to the time needed for the nickel signal to reduce to half its original value.
    Additional Material: 4 Ill.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/sia.740151005
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  • 9
    Electronic Resource
    Electronic Resource
    Surface analysis of uranyl fluoride layers with a glow discharge lamp (1991)
    Chichester [u.a.] : Wiley-Blackwell
    Surface and Interface Analysis 17 (1991), S. 219-220 
    Details
    ISSN: 0142-2421
    Keywords: Chemistry ; Polymer and Materials Science
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Physics
    Notes: Surface analysis with a Grimm-type glow discharge lamp was used to analyse uranyl fluoride layers that had formed on a nickel sufbstrate after exposure to UF6. Narrow-band optical filters were used to isolate the intensities of three fluorine emission lines. An in-depth profile of layer composition was obtained.
    Additional Material: 1 Ill.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/sia.740170410
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  • 10
    facet.materialart.
    Unknown
    Découverte en France d’un lépidoptère "primitif", Catapterix crimaea Zagulajev & Sinev, 1988 (Lepidoptera, Neopseustoidea, Acanthopteroctetidae) (2016)
    In:  Various articles (1288-5509) vol.XXV (2016) nr.3 p.153
    Details
    Publication Date: 2018-04-25
    Description: Trois mâles de Catapterix crimaea Zagulajev & Sinev, 1988, ont été découverts en France méridionale, espèce méconnue seulement citée de Crimée, appartenant à la petite famille des Acanthopteroctetidae (famille nouvelle pour la France) dans la superfamille des Neopseustoidea (superfamille nouvelle pour la France). Catapterix crimaea est la seuleespèce paléarctique connue des Acanthopteroctetidae. Three males of Catapterix crimaea Zagulajev & Sinev, 1988, were discovered in southern France. This little known species, belonging to the family Acanthopteroctetidae (new family for France), superfamily Neopseustoidea (new superfamily for France) was previously only recorded from the Crimea. Catapterix crimaea is the only known Palearctic species of the Acanthopteroctetidae. The small moths (5,5-6,5 mm wingspan) with their golden scales, head with erect hairscales, short tongue, long mandibular palps resemble some Nepticulidae, Heliozelidae or icropterigidae. Other characters include a single spur on the mid tibia (as in Eriocraniidae), and a single frenular bristle. The female and biology are unknown.
    Keywords: Acanthopteroctetidae ; France ; new species ; small moths
    Repository Name: National Museum of Natural History, Netherlands
    Type: Article / Letter to the editor
    Format: application/pdf
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