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  • Wiley-Blackwell  (3)
  • Copernicus  (2)
  • Nature Publishing Group  (2)
  • 1
    Electronic Resource
    Electronic Resource
    Deepest Photographic Evidence of an Abyssal Cephalopod (1971)
    [s.l.] : Nature Publishing Group
    Nature 232 (1971), S. 487-488 
    Details
    ISSN: 1476-4687
    Source: Nature Archives 1869 - 2009
    Topics: Biology , Chemistry and Pharmacology , Medicine , Natural Sciences in General , Physics
    Notes: [Auszug] On a recent Caribbean cruise of USNS Lynch, 340 exposures of the sea floor were obtained at seventeen stations. A modified Alpine multi-exposure camera system was used consisting of two 35 mm cameras mounted on a single frame and actuated by a bottom contact switch. Both cameras utilized the ...
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1038/232487b0
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  • 2
    Electronic Resource
    Electronic Resource
    Umbellulidae Distribution extended in the Atlantic (1970)
    [s.l.] : Nature Publishing Group
    Nature 225 (1970), S. 1068-1069 
    Details
    ISSN: 1476-4687
    Source: Nature Archives 1869 - 2009
    Topics: Biology , Chemistry and Pharmacology , Medicine , Natural Sciences in General , Physics
    Notes: [Auszug] The most remarkable forms of life photographed were organisms of the Phylum Cnidaria (Coelenterata) Family Umbellulidae (Fig. 2). Umbellulidae have previously been reported from the Atlantic by the Challenger Expedition (1873?1876)1. Dredged samples from this expedition form the basis for knowledge ...
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1038/2251068b0
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  • 3
    Electronic Resource
    Electronic Resource
    Zur Chemie der Amino-arsane. I. Zur Kenntnis von Alkylamino-arsanen mit AdamantanstrukturAnm. bei der Korrektur: Vgl. die Arbeiten von D. Hass, Z. anorg. allg. Chem. 326, 192 (1963); 325, 139 (1963). (1964)
    Weinheim : Wiley-Blackwell
    Zeitschrift für anorganische Chemie 328 (1964), S. 144-153 
    Details
    ISSN: 0044-2313
    Keywords: Chemistry ; Inorganic Chemistry
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Description / Table of Contents: Aminolysis of AsCl3 or transamination of As(NMe2)3 with methyl amine, n-butyl amine, and iso-propyl amine yields the alkylimino-arsanes As4(NMe)6, As4(N-i-Pr)6, and As4(N-n-Bu)6 having an adamantane-like structure. Contrary to these results is the aminolysis of AsCl3 by tert.-butyl amine, which gives tert.-butylamino-tert.-butyl-imino-arsane (t-BuNHAs-N-t-Bu)2. Selective cleavage of the As-X-bonds in As4(NMe)6 by HCl leads to As4(NMe)5Cl2 or (MeNAsCl)3. With CS2, exchange of sulfur for RN groups in As4(NR)6 (R = Me, n-Bu) occurs with formation of alkyl-isothiocyanates and alkylimino-arsenic sulfides.
    Notes: Bei der Aminolyse von AsCl3 und der Umaminierung von As(NMe2)3 mit Methylamin, n-Butylamin und i-Propylamin entstehen die Alkylimino-arsane As4(NMe)6, As4(N-i-Pr)6 und As4(N-n-Bu)6 mit Adamantanstruktur. Dagegen ergibt die Aminolyse von AsCl3 mit tert.-Butylamin dimeres (t-BuNHAs-N-t-Bu)2. Die selektive Abspaltung der MeN-Gruppen aus As4(NMe)6 durch HCl führt zu den Verbindungen As4(NMe)5Cl2 bzw. (MeNAsCl)3. CS2 reagiert mit As4(NR)6 (R = Me, n-Bu) unter Bildung von Senfölen und Alkyliminoarsen-sulfiden.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/zaac.19643280305
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  • 4
    Electronic Resource
    Electronic Resource
    Untersuchungen an Silicatmodellen. IV. Die Stellung der γ′-Modifikation im System der polymorphen Formen des Na2BeF4 (1953)
    Weinheim : Wiley-Blackwell
    Zeitschrift für anorganische Chemie 274 (1953), S. 72-80 
    Details
    ISSN: 0044-2313
    Keywords: Chemistry ; Inorganic Chemistry
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Notes: Die Umwandlungspunkte des wegen seiner Modellbeziehungen zum Ca2SiO4 inter-essierenden Na2BeF4 werden unter dem Heizmikroskop beobachtet. Die hieraus resultierende Korrektur der Umwandlungstemperatur γ-Na2BeF4-α′-Na2BeF4 von 175° ± 15° in 210° ± 1° ermöglicht eine befriedigende Darstellung der Phasenbeziehungen des kristallinen Na2BeF4. Die Sonderstellung des beim Ca2SiO4 nicht aufgefundenem γ′-Na2BeF4 wird erörtert.
    Additional Material: 3 Ill.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/zaac.19532740107
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  • 5
    Electronic Resource
    Electronic Resource
    Untersuchungen zur Kinetik der photoinitiierten Copolymerisation von Styren und Maleinsäureanhydrid. III. Startgeschwindigkeiten und mittlere MolmassenTeil I: Acta Polymerica 30 (1979) 577; Teil II: Acta Polymerica 31 (1980) 419 (1982)
    Weinheim : Wiley-Blackwell
    Acta Polymerica 33 (1982), S. 377-380 
    Details
    ISSN: 0323-7648
    Keywords: Chemistry ; Polymer and Materials Science
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology , Physics
    Description / Table of Contents: The inhibitor method using the Koelsch radical was found to allow convenient determination of the rate of initiation in photoinitated copolymerization of styrene with maleic anhydride in dependence on monomer composition in acrylonitrile and tetrahydrofurance as solvents. The change of the rate of initiation with monomer composition explains the change of the overall polymerization rate and supports the mechanism of reaction suggestes in theprevious paper.
    Notes: Es wird gezeigt, daß die Bestimmung der Startgeschwindigkeit bei der photoinitiierten Copolymerisation von Styren mit Maleinsäureanchydrid in Abhängigkeit von der Monomerzusammensetzung in Acrylinitril und Tetrahydrofuran als Lösungsmittel mittels der Inhibitormethode mit dem Koelsch-Radikal gut möglich ist. Die Änderung der Startgeschwindigkeit mit der Monomerzusammensetzung erklärt den Verlauf der Bruttopolymerisationsgeschwindigkeit und stützt den in der vorangegangenen Veröffentlichung postulierten Reaktionsmechanismus.
    Additional Material: 6 Ill.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/actp.1982.010330610
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  • 6
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    Forecasting wind-driven wildfires using an inverse modelling approach (2013)
    Copernicus
    Details
    Publication Date: 2013-12-04
    Description: A technology able to rapidly forecast wildlfire dynamics would lead to a paradigm shift in the response to emergencies, providing the Fire Service with essential information about the on-going fire. The article at hand presents and explores a novel methodology to forecast wildfire dynamics in wind-driven conditions, using real time data assimilation and inverse modelling. The forecasting algorithm combines Rothermel's rate of spread theory with a perimeter expansion model based on Huygens principle and solves the optimisation problem with a tangent linear approach and a forward automatic differentiation. Its potential is investigated using synthetic data and evaluated in different wildfire scenarios. The results show the high capacity of the method to quickly predict the location of the fire front with a positive lead time (ahead of the event). This work opens the door to further advances framework and more sophisticated models while keeping the computational time suitable for operativeness.
    Electronic ISSN: 2195-9269
    Topics: Geography , Geosciences
    Published by Copernicus on behalf of European Geosciences Union.
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  • 7
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    Forecasting wind-driven wildfires using an inverse modelling approach (2014)
    Copernicus
    Details
    Publication Date: 2014-06-13
    Description: A technology able to rapidly forecast wildfire dynamics would lead to a paradigm shift in the response to emergencies, providing the Fire Service with essential information about the ongoing fire. This paper presents and explores a novel methodology to forecast wildfire dynamics in wind-driven conditions, using real-time data assimilation and inverse modelling. The forecasting algorithm combines Rothermel's rate of spread theory with a perimeter expansion model based on Huygens principle and solves the optimisation problem with a tangent linear approach and forward automatic differentiation. Its potential is investigated using synthetic data and evaluated in different wildfire scenarios. The results show the capacity of the method to quickly predict the location of the fire front with a positive lead time (ahead of the event) in the order of 10 min for a spatial scale of 100 m. The greatest strengths of our method are lightness, speed and flexibility. We specifically tailor the forecast to be efficient and computationally cheap so it can be used in mobile systems for field deployment and operativeness. Thus, we put emphasis on producing a positive lead time and the means to maximise it.
    Print ISSN: 1561-8633
    Electronic ISSN: 1684-9981
    Topics: Geography , Geosciences
    Published by Copernicus on behalf of European Geosciences Union.
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