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  • 1
    Monograph available for loan
    Monograph available for loan
    ESA's report to the 33rd COSPAR meeting : Warsaw, Poland July 2000 (2000)
    Noordwijk : ESA Publications Division
    Associated volumes
    Details Availability
    Call number: AWI A1-00-0196-2
    In: 33rd COSPAR Scientific Assembly
    In: Special publications
    Type of Medium: Monograph available for loan
    Pages: 131 S. : Ill., graph. Darst., Kt.
    ISBN: 9290925604
    Series Statement: Special publications / European Space Agency 1241
    URL: http://esamultimedia.esa.int/multimedia/publications/SP-1241/SP-1241.pdf/
    Location: AWI Reading room
    Branch Library: AWI Library
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  • 2
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    Search for transient optical counterparts to high-energy IceCube neutrinos with Pan-STARRS1 (2019)
    EDP Sciences
    Details
    Publication Date: 2019-06-01
    Description: In order to identify the sources of the observed diffuse high-energy neutrino flux, it is crucial to discover their electromagnetic counterparts. To increase the sensitivity of detecting counterparts of transient or variable sources by telescopes with a limited field of view, IceCube began releasing alerts for single high-energy (Eν 〉  60 TeV) neutrino detections with sky localisation regions of order 1° radius in 2016. We used Pan-STARRS1 to follow-up five of these alerts during 2016–2017 to search for any optical transients that may be related to the neutrinos. Typically 10–20 faint (miP1 ≲ 22.5 mag) extragalactic transients are found within the Pan-STARRS1 footprints and are generally consistent with being unrelated field supernovae (SNe) and AGN. We looked for unusual properties of the detected transients, such as temporal coincidence of explosion epoch with the IceCube timestamp, or other peculiar light curve and physical properties. We found only one transient that had properties worthy of a specific follow-up. In the Pan-STARRS1 imaging for IceCube-160427A (probability to be of astrophysical origin of ∼50%), we found a SN PS16cgx, located at 10.0′ from the nominal IceCube direction. Spectroscopic observations of PS16cgx showed that it was an H-poor SN at redshift z = 0.2895 ± 0.0001. The spectra and light curve resemble some high-energy Type Ic SNe, raising the possibility of a jet driven SN with an explosion epoch temporally coincident with the neutrino detection. However, distinguishing Type Ia and Type Ic SNe at this redshift is notoriously difficult. Based on all available data we conclude that the transient is more likely to be a Type Ia with relatively weak Si II absorption and a fairly normal rest-frame r-band light curve. If, as predicted, there is no high-energy neutrino emission from Type Ia SNe, then PS16cgx must be a random coincidence, and unrelated to the IceCube-160427A. We find no other plausible optical transient for any of the five IceCube events observed down to a 5σ limiting magnitude of miP1 ≈ 22 mag, between 1 day and 25 days after detection.
    Print ISSN: 0004-6361
    Electronic ISSN: 1432-0746
    Topics: Physics
    Published by EDP Sciences
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  • 3
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    Multi-messenger Observations of a Binary Neutron Star Merger (2017)
    Institute of Physics
    Details
    Publication Date: 2017-10-16
    Print ISSN: 2041-8205
    Electronic ISSN: 2041-8213
    Topics: Physics
    Published by Institute of Physics
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  • 4
    Electronic Resource
    Electronic Resource
    Caste differences in haemolymph proteins in two species of termites (1981)
    Springer
    Insectes sociaux 28 (1981), S. 71-86 
    Details
    ISSN: 1420-9098
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology
    Description / Table of Contents: Zusammenfassung BeiMacrotermes sabhyalinus wurden Haemolymph-Proteine und-Esterasen, beiZootermopsis angusticolhe Haemolymph-Proteine diskelektrophoretisch untersucht. Die Bandenmuster waren beiM. subhyalinus kastenspezifisch, beiZ. angusticollis dagegen einheitlich bei allen Kasten beider Geschlechter. BeiM. subhyalinus wurden zudem Unterschiede in der Aktivität von Esterasen, speziell Carboxylesterasen, sowie in der Bindungskapazität der Haemolymphe für Juvenilhormon festgestellt. Diese Resultate werden in Beziehung gesetzt zu den aktuellen Vorstellungen über Kastendetermination bei niederen und höheren Terrniten.
    Notes: Summary Haemolymph proteins and esterases ofMacrotermes subhyalinus and haemolymph proteins ofZootermopsis angusticollis have been analyzed electrophoretically. The patterns were caste specific inM. subhyalinus, but uniform for all castes and sexes inZ. angusticollis. InM. subhyalinus the activities of esterases, especially that of carboxylesterases, and the haemolymph binding capacity for juvenile hormone differend between castes. The results are discussed in relation to the present knowledge about caste determination in lower and higher termites.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF02223624
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  • 5
    Electronic Resource
    Electronic Resource
    Phenotypic assortative mating and genetic population structure in the crab Trapezia digitalis (1987)
    Springer
    Marine biology 93 (1987), S. 509-515 
    Details
    ISSN: 1432-1793
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology
    Notes: Abstract Colonies of Pocillopora spp. containing the crab Trapezia digitalis were collected from Hawaii in summer of 1979 and of 1980. Individuals of T. digitalis in Hawaii vary extensively in coloration of the carapace: crabs were separated into phenotypic classes by their degree of carapace reticulation. When presented with two females of different phenotype, males preferentially paired with the female which was similar to them in reticulation. The genetic population structure of T. digitalis was unusual by comparison with other species of Trapezia. Previously reported homozygote excesses at esterase-4, hexokinase-1, phosphoglucoseisomerase, and general protein-2 cannot be explained by the single-locus Wahlund effect, since there was not significant genetic differentiation among phenotypic classes, as measured by Wright's F ST statistic. There was significant variation among classes in allele frequencies at a fifth locus, hexokinase-2. Two pairs of loci were in significant gametic disequilibrium. Gametic disequilibrium was not detected in seven other species of Trapezia. It is suggested that multi-locus genetic analysis and an increased geographic sampling range are needed to determine the genetic population structure of T. digitalis in relation to observed variation in coloration.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00392788
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  • 6
    Electronic Resource
    Electronic Resource
    Thermally induced surface relief gratings in azobenzene polymers (2000)
    College Park, Md. : American Institute of Physics (AIP)
    The Journal of Chemical Physics 113 (2000), S. 833-837 
    Details
    ISSN: 1089-7690
    Source: AIP Digital Archive
    Topics: Physics , Chemistry and Pharmacology
    Notes: Recently, Ramanujam and co-workers described for the first time that surface relief gratings can be inscribed into azobenzene copolymers with a single pair of nanosecond laser pulses. We performed a detailed investigation of the involved processes. Two contributions to the diffraction efficiency are observed, one arising from a surface relief and one from a transient cis–trans grating which decays on millisecond time scales. The stable surface relief, in contrast, is caused by a thermal effect which sets in at a well-defined threshold value of the pulse energy. © 2000 American Institute of Physics.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1063/1.481858
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  • 7
    Electronic Resource
    Electronic Resource
    Deux nouvelles structures polytypiques dans le système titane–soufre: 16H et 18H (1978)
    [S.l.] : International Union of Crystallography (IUCr)
    Acta crystallographica 34 (1978), S. 982-986 
    Details
    ISSN: 1600-5724
    Source: Crystallography Journals Online : IUCR Backfile Archive 1948-2001
    Topics: Chemistry and Pharmacology , Geosciences , Physics
    Notes: The structures of two recently discovered polytypes of titanium sulphide have been determined. The structure of 18H, mainly built on a stacking sequence similar to that of 8H (3212), confirms the formation mechanism formerly suggested for TiS1.7 hexagonal polytypes. In the same way, the stacking sequence of 16H provides some evidence of a 4H → 12H transformation producing rhombohedral polytypes. The experimental data supporting these conclusions are presented in this paper.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1107/S0567739478002016
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  • 8
    Electronic Resource
    Electronic Resource
    Generation of polytypic structures by thermally induced expansion of stacking faults in a titanium sulphide single crystal (1980)
    [S.l.] : International Union of Crystallography (IUCr)
    Acta crystallographica 36 (1980), S. 1031-1032 
    Details
    ISSN: 1600-5724
    Source: Crystallography Journals Online : IUCR Backfile Archive 1948-2001
    Topics: Chemistry and Pharmacology , Geosciences , Physics
    Notes: A titanium sulphide single crystal of pure 4H basic structure has been heated to 1093 K (30 K below its preparation temperature). Observations carried out by microscopy and X-ray diffraction show that, in such conditions, polytypic structures appear with periods which are in perfect agreement with what was expected according to a previously suggested formation mechanism
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1107/S0567739480002082
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  • 9
    Electronic Resource
    Electronic Resource
    Formation of titanium sulphide hexagonal polytypes (1977)
    [S.l.] : International Union of Crystallography (IUCr)
    Acta crystallographica 33 (1977), S. 971-975 
    Details
    ISSN: 1600-5724
    Source: Crystallography Journals Online : IUCR Backfile Archive 1948-2001
    Topics: Chemistry and Pharmacology , Geosciences , Physics
    Notes: A mechanism which explains the formation of hexagonal polytypes of titanium sulphide is suggested. According to this mechanism, polytypes are generated by the interaction of stacking faults with a screw dislocation during solid-state transformations. A 2H → 8H phase transformation seems to be the driving force for the expansion of stacking faults. All the structural information which has been so far collected on these polytypes is in perfect agreement with such a mechanism. A generalization to the interaction of stacking faults with several parallel screw dislocations is presented. The formation of polytypes with very long periods may be explained by this kind of interaction.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1107/S0567739477002319
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  • 10
    Electronic Resource
    Electronic Resource
    Impact of Roasting Conditions on the Formation of Aroma Compounds in Coffee Beans (2002)
    Oxford, UK : Blackwell Publishing Ltd
    Journal of food science 67 (2002), S. 0 
    Details
    ISSN: 1750-3841
    Source: Blackwell Publishing Journal Backfiles 1879-2005
    Topics: Agriculture, Forestry, Horticulture, Fishery, Domestic Science, Nutrition , Process Engineering, Biotechnology, Nutrition Technology
    Notes: : Hot air roasting of coffee beans results in a large number of aroma compounds. For a given coffee, the aroma profile is determined by the specific conditions for chemical reactions as controlled by the process parameters. Therefore, the influence of roasting temperatures on the formation of key aroma compounds was investigated. Coffee was roasted in 6 different processes to equal degrees of roast and the developing aroma compound profiles were characterized by gas chromatography, mass spectrometry, and olfactometry. A majority of aroma compounds showed the highest increase in concentration at medium stage of dehydration with bean water content from 7 to 2% (wb). Different time-temperature histories led to distinct aroma compound profiles. To reach a specific flavor profile, precise control of roasting time and temperature is required.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1111/j.1365-2621.2002.tb11359.x
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