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  • 1
    Electronic Resource
    Electronic Resource
    Response ofPhloeotribus scarabaeoides (Coleoptera, Scolytidae) to ethylene in an olfactometer (1995)
    Springer
    Cellular and molecular life sciences 51 (1995), S. 77-79 
    Details
    ISSN: 1420-9071
    Keywords: Ethylene ; kairomone ; Phloeotribus scarabaeoides ; Coleoptera ; Scolytidae
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology , Medicine
    Notes: Abstract The role of ethylene, pure or in formulation, in the colonization behaviour of the olive bark beetle,Phloeotribus scarabaeoides (Coleoptera, Scolytidae) has been investigated in the laboratory. Ethylene has been found to be attractive in both sexes; the formulation ethrel 48 was active in an olfactometer up to several months. Ethylene, whose concentration varies with the developmental stage or the condition of the tree or its wood, may play an important role in the primary attraction of these scolytids to their host.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF01964924
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  • 2
    Electronic Resource
    Electronic Resource
    Chemical composition and coercivity of SmCo5 magnets (1998)
    [S.l.] : American Institute of Physics (AIP)
    Journal of Applied Physics 84 (1998), S. 368-373 
    Details
    ISSN: 1089-7550
    Source: AIP Digital Archive
    Topics: Physics
    Notes: The effects of alloy composition and heat treatment on the intrinsic coercivity iHc of SmCo5 magnets were studied. Alloys having six chemical compositions near that of stoichiometric SmCo5 were used to produce magnets via the usual powder metallurgy techniques. Magnets were either as sintered (1150 °C) or sintered (1150 °C) and treated at 850 °C. The substantial increase in iHc due to the 850 °C heat treatment occurs reversibly and with a negligible change in lattice parameters, Curie temperature Tc and anisotropy field HA. Quantitative metallography and thermomagnetic measurements showed that the microstructural constituent present in addition to the SmCo5 phase in hyperstoichiometric alloys is composed of both the Sm2Co7 phase and the Sm5Co19 phase. Measurements of magnetization in dc magnetic fields up to 33 T suggest that HA is around 53 T, considerably higher than previously reported values. The coercivity of the magnets is discussed in terms of thermal equilibrium populations of lattice defects. © 1998 American Institute of Physics.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1063/1.368075
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  • 3
    Electronic Resource
    Electronic Resource
    Acetonide-3-trinervinone (1996)
    Oxford [u.a.] : International Union of Crystallography (IUCr)
    Acta crystallographica 52 (1996), S. 1460-1462 
    Details
    ISSN: 1600-5759
    Source: Crystallography Journals Online : IUCR Backfile Archive 1948-2001
    Topics: Chemistry and Pharmacology , Geosciences , Physics
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1107/S0108270195015617
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  • 4
    Electronic Resource
    Electronic Resource
    Trinervinol (1996)
    Oxford [u.a.] : International Union of Crystallography (IUCr)
    Acta crystallographica 52 (1996), S. 1458-1460 
    Details
    ISSN: 1600-5759
    Source: Crystallography Journals Online : IUCR Backfile Archive 1948-2001
    Topics: Chemistry and Pharmacology , Geosciences , Physics
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1107/S0108270195015599
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  • 5
    Electronic Resource
    Electronic Resource
    Identification of chemicals attractive to the olive bark beetle, Phloeotribus scarabaeoides, in laboratory bioassays (1998)
    Springer
    BioControl 43 (1998), S. 345-355 
    Details
    ISSN: 1573-8248
    Keywords: 2-methyl ketones ; aldehydes ; analysis ; attractants ; Coleoptera ; monoterpenes ; Scolytidae
    Source: Springer Online Journal Archives 1860-2000
    Topics: Agriculture, Forestry, Horticulture, Fishery, Domestic Science, Nutrition
    Notes: Abstract The semiochemical system of the olive bark beetle Phloeotribus scarabaeoides was investigated. During the course of their life-cycle, whole insects, excised hindguts, frass, wood and leaves were collected, from both the field and from a laboratory rearing system. Samples were analysed by capillary GC/MS, after solvent extraction, collection of air volatiles on a sorbent or solid sample injection. Olfactometer bioassays were used to test the different samples and individual compounds for attraction to both sexes. Decanal, undecanal, 2-decanone, 2-nonanone and 2-undecanone, as well as α- and β-pinene, were identified as attractive compounds.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1023/A:1009931601673
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  • 6
    Electronic Resource
    Electronic Resource
    The influence of ethylene on primary attraction of the olive beetle,Phloeotribus scarabaeoides (Bern.) (Col., Scolytidae) (1996)
    Springer
    Cellular and molecular life sciences 52 (1996), S. 723-726 
    Details
    ISSN: 1420-9071
    Keywords: Primary attraction ; Scolytidae ; olive beetle ; Phloeotribus scarabaeoides ; ethylene
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology , Medicine
    Notes: Abstract Two experiments have been carried out to verify the effect of ethylene on the primary attraction ofPhloeotribus scarabaeoides under both laboratory and field conditions. The experiments were based on the enhancement of ethylene production by olive branches and trunks after the application of (2-chloroethyl)phosphonic acid. Under laboratory conditions, the beetles' response was strongly stimulated on the treated branches. Under field conditions, the treatment aided the location of the olive wood by the flying beetles, and the attack density was significantly greater in the treated wood at the end of the experiment.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF01925582
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  • 7
    Electronic Resource
    Electronic Resource
    Relation between ambient humidity and ionic conductivity of poly(thionaphtheneindole): behaviour as an amperometric humidity sensor (1997)
    Springer
    Journal of applied electrochemistry 27 (1997), S. 441-447 
    Details
    ISSN: 1572-8838
    Source: Springer Online Journal Archives 1860-2000
    Topics: Chemistry and Pharmacology , Electrical Engineering, Measurement and Control Technology
    Notes: Abstract The electrical characteristics of oxidized poly(thionaphtheneindole) were investigated as a function of ambient relative humidity (r.h.). The current flowing through a pressed pellet of material between two massive gold electrodes plotted against voltage gives a wave-shaped curve with a halfwave potential at V 〈$〉=〈$〉~3V. The current recorded at 4V (plateau of the wave) is a sigmoidal function of r.h. with the inflexion point at ~60%. An interpretation of these findings is given, based on the influence of water on the dielectric constant of the material and on acid–base equilibrium between poly(thionaphtheneindole) and water, from which protons are produced. The behaviour of poly (thionaphtheneindole) as the active component of an amperometric humidity sensor is also reported.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1023/A:1018417821896
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  • 8
    Electronic Resource
    Electronic Resource
    Relationships among environment, spawning and settlement of Queen scallop in the Ría de Arosa (Galicia, NW Spain) (1996)
    Springer
    Aquaculture international 4 (1996), S. 225-236 
    Details
    ISSN: 1573-143X
    Keywords: Energy reserves ; Queen scallop (Aequipecten opercularis) ; Reproduction ; Settlement
    Source: Springer Online Journal Archives 1860-2000
    Topics: Agriculture, Forestry, Horticulture, Fishery, Domestic Science, Nutrition
    Notes: This study examines the relationship of the reproductive and reserve storage cycles and spat settlement of the Queen scallop (Aequipecten opercularis) to environmental factors. The possibility of farming this species from spat settled on collectors is considered. The gonad condition index shows maximum values between mid-May and early August. Another peak occurs in mid-November. In spring and summer, the energy needed for gametogenesis is derived from food, although it is possible that direct transfer may occur from the digestive gland to the gonad. The glycogen and lipid content of the reserve organs reaches maximum values between late summer and early autumn. The energy requirements related to gametogenesis, which begins in autumn, involve the consumption of accumulated reserves with the resulting reduction in the condition indices. There is a positive correlation between temperature and the condition indices of the digestive gland, the adductor muscle and their lipid and glycogen content, respectively. Two settlement periods were recorded, one in winter, which could not be associated with the spawning of the experimental animals, and another in summer, which coincided with the spawning that took place in spring. The reduced gonad indices recorded at the end of the summer and in winter did not lead to settlement.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00117384
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  • 9
    Electronic Resource
    Electronic Resource
    Poole-Frenkel effect in amorphous poly(p-phenylene sulfide) (1996)
    Bognor Regis [u.a.] : Wiley-Blackwell
    Journal of Polymer Science Part B: Polymer Physics 34 (1996), S. 623-629 
    Details
    ISSN: 0887-6266
    Keywords: poly(p-phenylene sulfide) ; electrical conductivity of poly(p-phenylene sulfide) ; Poole-Frenkel effect ; Chemistry ; Polymer and Materials Science
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology , Physics
    Notes: The conductivity of poly(p-phenylene sulfide) (PPS) amorphous samples sandwiched between metallic electrodes has been studied as a function of applied voltage, temperature, and electrode material. The voltage (U) dependence of the currents for electric fields within the range 103-106 V/cm exhibits exp βU1/2 behavior with β = βSchottky below the glass transition temperature (Tg ≊ 90°C), and β = βPoole-Frenkel above Tg. Coordinated temperature measurements of dc currents with different metallic contacts and thermally stimulated currents (TSC) indicate, however, that the conductivity at T 〈 Tg is consistent with the so-called “anomalous” Poole-Frenkel effect rather than the Schottky effect. Consequently, the p-type conductivity in amorphous PPS is proposed to be a bulk-limited process due to ionization of two different types of acceptor centers in the presence of neutral hole traps. © 1996 John Wiley & Sons, Inc.
    Additional Material: 4 Ill.
    Type of Medium: Electronic Resource
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  • 10
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    Chemical composition and coercivity of SmCo5 magnets (1998)
    American Institute of Physics
    Details
    Publication Date: 1998-07-01
    Print ISSN: 0021-8979
    Electronic ISSN: 1089-7550
    Topics: Physics
    Published by American Institute of Physics
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