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  • Polymer and Materials Science  (3)
  • Computer Systems  (2)
  • (Z,Z,Z)-3,6,9-nonadecatriene, anantiomers  (1)
  • 1
    Electronic Resource
    Electronic Resource
    Sex pheromone components of the giant looper,Boarmia selenaria schiff. (Lepidoptera: Geometridae): Identification, synthesis, electrophysiological evaluation, and behavioral activity (1992)
    Springer
    Journal of chemical ecology 18 (1992), S. 165-181 
    Details
    ISSN: 1573-1561
    Keywords: Boarmia selenaria ; giant looper ; sex pheromones ; Lepidoptera ; Geometridae ; (Z,Z)-6,9-cis-(3S,4R)-epoxynonadecadiene ; (Z,Z)-6,9-cis-(3R,4S)-epoxynonadecadiene ; (Z,Z,Z)-3,6,9-nonadecatriene, anantiomers ; enantioselective synthesis ; EAG ; wind tunnel ; field tests ; precursor
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology , Chemistry and Pharmacology
    Notes: Abstract (Z,Z)-6,9-cis-(3S,4R)-Epoxynonadecadiene9a and (Z,Z,Z)-3,6,9-nonadecatriene have been identified as sex pheromone components in female ovipositor extracts and effluvia of the geometridBoarmia selenaria. The identification was based on relative retention times on gas chromatographic columns, GC-MS, chemical enantioselective syntheses, EAG, wind-tunnel behavioral experiments, and field tests. A single female ovipositor extract contained an average of 42 ng of (Z,Z)-6,9-cis-3,4-epoxynonadecadiene and 2 ng of (Z,Z,Z)-3,6,9-nonadecatriene.EAG, wind-tunnel behavioral studies, and field tests demonstrated that maleB. selenaria exhibit preferential attraction for the (3S,4R)-enantiomer of (Z,Z)-6,9-cis-3,4-epoxynonadecadiene. Only in effluvia and ovipositor extracts of calling females was (Z,Z)-6,9-cis- 3,4-epoxynonadecadiene detected, whereas relatively high amounts of (Z,Z,Z)-3,6,9-nonadecatriene were found in noncalling females. Wind-tunnel behavioral studies showed that (Z,Z,Z)-3,6,9-nonadecatriene did not elicit any response in the males, and when tested in combination with a mixture of monoepoxynonadecadienes, (Z,Z,Z)-3,6,9-nonadecatriene decreased the observed behavioral responses. A possible precursor role for (Z,Z,Z)-3,6,9-nonadecatriene in the pheromonal system is discussed.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00993751
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    Paper (German National Licenses)
    Fulltext
  • 2
    Electronic Resource
    Electronic Resource
    Plastics vs. Corrosives. Von RAYMOND B. SEYMOUR. New York/Chicester/Brisbane/Toronto/Singapore: John Wiley u. Sons, Inc. 1982. 285 S., Lwd., £ 37.00 (1983)
    Weinheim : Wiley-Blackwell
    Acta Polymerica 34 (1983), S. 447-448 
    Details
    ISSN: 0323-7648
    Keywords: Chemistry ; Polymer and Materials Science
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology , Physics
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/actp.1983.010340717
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    Paper (German National Licenses)
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  • 3
    Electronic Resource
    Electronic Resource
    Spezialplaste. Von KONRAD-ULRICH BÜHLER. Berlin: Akademie-Verlag 1978. 1015 S., 230 Abb., 182 Tab. Lwd. M 160,- (1979)
    Weinheim : Wiley-Blackwell
    Acta Polymerica 30 (1979), S. 228-228 
    Details
    ISSN: 0323-7648
    Keywords: Chemistry ; Polymer and Materials Science
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology , Physics
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/actp.1979.010300415
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  • 4
    Electronic Resource
    Electronic Resource
    Developments in polymer stabilisation - 7. Hg. von G. SCOTT. ISBN 0-85334-303-9. London/New York: Elsevier Applied Science Publishers 1984. X, 308 S., geb. £ 38.00 (1986)
    Weinheim : Wiley-Blackwell
    Acta Polymerica 37 (1986), S. 325-325 
    Details
    ISSN: 0323-7648
    Keywords: Chemistry ; Polymer and Materials Science
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology , Physics
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/actp.1986.010370521
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  • 5
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    Pentium Pro inside (1997)
    In:  CASI
    Details
    Publication Date: 2019-08-17
    Description: As an entry for the 1997 Gordon Bell performance prize, we present results from two methods of solving the gravitational N-body problem on the Intel Teraflops system at Sandia National Laboratory (ASCI Red). The first method, an O(N2) algorithm, obtained 635 Gigaflops for a 1 million particle problem on 6800 Pentium Pro processors. The second solution method, a tree-code which scales as O(N log N), sustained 170 Gigaflops over a continuous 9.4 hour period on 4096 processors, integrating the motion of 322 million mutually interacting particles in a cosmology simulation, while saving over 100 Gigabytes of raw data. Additionally, the tree-code sustained 430 Gigaflops on 6800 processors for the first 5 time-steps of that simulation. This tree-code solution is approximately 105 times more efficient than the O(N2) algorithm for this problem. As an entry for the 1997 Gordon Bell price/performance prize, we present two calculations from the disciplines of astrophysics and fluid dynamics. The simulations were performed on two 16 Pentium Pro processor Beowulf-class computers (Loki and Hyglac) constructed entirely from commodity personal computer technology, at a cost of roughly $50k each in September, 1996. The price of an equivalent system in August 1997 is less than $30. At Los Alamos, Loki performed a gravitational tree-code N-body simulation of galaxy formation using 9.75 million particles, which sustained an average of 879 Mflops over a ten day period, and produced roughly 10 Gbytes of raw data.
    Keywords: Computer Systems
    Type: DE98-000260 , LA-UR-97-3456
    Format: text
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    NASA TECHNICAL REPORTS
  • 6
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    Parallel supercomputing with commodity components (1997)
    In:  Other Sources
    Details
    Publication Date: 2019-07-13
    Description: We have implemented a parallel computer architecture based entirely upon commodity personal computer components. Using 16 Intel Pentium Pro microprocessors and switched fast ethernet as a communication fabric, we have obtained sustained performance on scientific applications in excess of one Gigaflop. During one production astrophysics treecode simulation, we performed 1.2 x 10(sup 15) floating point operations (1.2 Petaflops) over a three week period, with one phase of that simulation running continuously for two weeks without interruption. We report on a variety of disk, memory and network benchmarks. We also present results from the NAS parallel benchmark suite, which indicate that this architecture is competitive with current commercial architectures. In addition, we describe some software written to support efficient message passing, as well as a Linux device driver interface to the Pentium hardware performance monitoring registers.
    Keywords: Computer Systems
    Type: LA-UR-97-1901 , CONF-9706149-1 , DE97-008155 , International Conference on Parallel and Distributed Processing Techniques and Applications; Jun 30, 1997 - Jul 03, 1997; Las Vegas, NV; United States
    Format: text
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    NASA TECHNICAL REPORTS
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