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  • Chemistry  (625)
  • 550 - Earth sciences  (83)
  • Fisheries  (6)
  • Life and Medical Sciences  (4)
  • *Biodiversity  (3)
  • 1
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    Ecology. Tackling ecological complexity in climate impact research (2007)
    American Association for the Advancement of Science (AAAS)
    Details
    Publication Date: 2007-02-03
    Description: 〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Walther, Gian-Reto -- New York, N.Y. -- Science. 2007 Feb 2;315(5812):606-7.〈br /〉〈span class="detail_caption"〉Author address: 〈/span〉Department of Plant Ecology, University of Bayreuth, 95440 Bayreuth, Germany. gian-reto.walther@uni-bayreuth.de〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/17272708" target="_blank"〉PubMed〈/a〉
    Keywords: Animals ; *Biodiversity ; California ; *Climate ; *Ecosystem ; *Invertebrates/physiology ; *Plant Development ; Poaceae/growth & development ; Population Dynamics ; Rain ; Research Design ; Seasons ; Time Factors
    Print ISSN: 0036-8075
    Electronic ISSN: 1095-9203
    Topics: Biology , Chemistry and Pharmacology , Computer Science , Medicine , Natural Sciences in General , Physics
    Published by American Association for the Advancement of Science (AAAS)
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  • 2
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    Ecology: The Convention on Biological Diversity's 2010 target (2005)
    American Association for the Advancement of Science (AAAS)
    Details
    Publication Date: 2005-01-18
    Description: 〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Balmford, Andrew -- Bennun, Leon -- Brink, Ben Ten -- Cooper, David -- Cote, Isabelle M -- Crane, Peter -- Dobson, Andrew -- Dudley, Nigel -- Dutton, Ian -- Green, Rhys E -- Gregory, Richard D -- Harrison, Jeremy -- Kennedy, Elizabeth T -- Kremen, Claire -- Leader-Williams, Nigel -- Lovejoy, Thomas E -- Mace, Georgina -- May, Robert -- Mayaux, Phillipe -- Morling, Paul -- Phillips, Joanna -- Redford, Kent -- Ricketts, Taylor H -- Rodriguez, Jon Paul -- Sanjayan, M -- Schei, Peter J -- van Jaarsveld, Albert S -- Walther, Bruno A -- New York, N.Y. -- Science. 2005 Jan 14;307(5707):212-3.〈br /〉〈span class="detail_caption"〉Author address: 〈/span〉Cambridge University and University of Cape Town.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/15653489" target="_blank"〉PubMed〈/a〉
    Keywords: Animals ; *Biodiversity ; *Conservation of Natural Resources ; *Ecology ; Ecosystem ; Humans ; Interdisciplinary Communication ; International Cooperation ; Models, Biological ; Models, Theoretical ; Public Policy
    Print ISSN: 0036-8075
    Electronic ISSN: 1095-9203
    Topics: Biology , Chemistry and Pharmacology , Computer Science , Medicine , Natural Sciences in General , Physics
    Published by American Association for the Advancement of Science (AAAS)
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  • 3
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    Ecology. Toward a global biodiversity observing system (2008)
    American Association for the Advancement of Science (AAAS)
    Details
    Publication Date: 2008-08-23
    Description: 〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Scholes, R J -- Mace, G M -- Turner, W -- Geller, G N -- Jurgens, N -- Larigauderie, A -- Muchoney, D -- Walther, B A -- Mooney, H A -- New York, N.Y. -- Science. 2008 Aug 22;321(5892):1044-5. doi: 10.1126/science.1162055.〈br /〉〈span class="detail_caption"〉Author address: 〈/span〉Council of Scientific and Industrial Research (CSIR), Natural Resources and Environment, Post Office Box 395, Pretoria 0001, South Africa. bscholes@csir.co.za〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/18719268" target="_blank"〉PubMed〈/a〉
    Keywords: Animals ; *Biodiversity ; Ecosystem ; Environment ; International Agencies ; *International Cooperation
    Print ISSN: 0036-8075
    Electronic ISSN: 1095-9203
    Topics: Biology , Chemistry and Pharmacology , Computer Science , Medicine , Natural Sciences in General , Physics
    Published by American Association for the Advancement of Science (AAAS)
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  • 4
    Electronic Resource
    Electronic Resource
    Two-component diacrylate networks from liquid-crystalline and non-liquid-crystalline monomers I. Synthesis of the monomers, phase behaviour of the binary monomer mixtures, network formation (1997)
    Weinheim : Wiley-Blackwell
    Angewandte Makromolekulare Chemie 250 (1997), S. 105-117 
    Details
    ISSN: 0003-3146
    Keywords: Chemistry ; Polymer and Materials Science
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology , Physics
    Description / Table of Contents: Aus Bisacrylaten wurden durch photoinduzierte Vernetzung in der isotropen Phase zweikomponentige Netzwerke synthetisiert. Bei allen Systemen wurde als eine Komponente ein Bisacrylat verwendet, das eine flüssigkristalline Phase bilden kann, und als zweite Komponente ein Bisacrylat, das dazu nicht in der Lage ist. Die isotrope Komponente wurde hinsichtlich ihrer Größe, Geometrie und Polarität variiert. Für alle Systeme wurden mittels einer Wärmeflußkalorimetrie (DSC) Phasendiagramme der Monomermischungen erstellt. Das Phasenverhalten der Systeme zeigt eine Abhängigkeit vom Schmelzpunkt und der chemischen Struktur der isotropen Zweitkomponente. Die Vernetzungstemperatur wurde so gewählt, dafß die Vernetzung in der isotropen Phase 10 °C über der Phasenllbergangstemperatur erfolgte. Die Reaktionskinetik wurde aus den Photopolymerisationsenthalpien mittels eines für photochemische Vernetzungen modifizierten DSC-Gerätes untersucht. Die Zeitabhängigkeit des Umsatzes und der Gesamtumsatz an Acrylatbindungen wurden aus den DSC-Kurven ermittelt. Der Gesamtumsatz hängt nicht von der Reaktionstemperatur und der Struktur der Monomeren ab und liegt je nach Zusammensetzung füralle Systeme zwischen 53 und 71%. Die Zeitabhängigkeit des Umsatzes hingegen wird von der Struktur des nicht flüssigkristallinen Comonomeren beeinflufßt.
    Notes: Two-component networks of diacrylate monomers were synthesized by photoinduced polymerization in the isotropic phase. In all systems one component was a liquid-crystalline diacrylate, whereas the second component was a non-liquid-crystalline diacrylate, which was varied in size, geometry and polarity. The phase behaviour of the monomer mixtures has been analysed by differential scanning calorimetry (DSC). It is influenced by the melting point and the structure of the non-liquid-crystalline component. All samples were cross-linked in the isotropic phase 10°C above the phase transition temperature and a modified differential scanning calorimeter was used to investigate the enthalpies of photopolymerization. The final value and the time dependence of the conversion of acrylate double bonds were calculated from the DSC curves. The final degree of conversion of the acrylate double bonds was between 53 and 71% for all samples, whereas no significant dependence of the degree of conversion on the chemical structure of the monomers or the reaction temperature has been found. In contrast, the time dependence of the conversion was influenced by the chemical structure of the non-liquid-crystalline component.
    Additional Material: 5 Ill.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/apmc.1997.052500108
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  • 5
    Electronic Resource
    Electronic Resource
    Mikrobielle Eiweißgewinnung aus Kohlenwasserstoffen (1975)
    Weinheim : Wiley-Blackwell
    Chemie in unserer Zeit 9 (1975), S. 59-64 
    Details
    ISSN: 0009-2851
    Keywords: Chemistry ; Chemistry
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Additional Material: 5 Ill.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/ciuz.19750090205
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  • 6
    Electronic Resource
    Electronic Resource
    N-Trifluoracetyl-und N-Trichloracetyl-imidazol (1962)
    Weinheim : Wiley-Blackwell
    Berichte der deutschen chemischen Gesellschaft 95 (1962), S. 2070-2072 
    Details
    ISSN: 0009-2940
    Keywords: Chemistry ; Inorganic Chemistry
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Notes: Synthesen und Reaktionen von N-Trifluoracetyl-imidazol und N-Trichloracetyl-imidazol werden beschrieben.
    Additional Material: 2 Tab.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/cber.19620950831
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  • 7
    Electronic Resource
    Electronic Resource
    Polyacetylenverbindungen, LXXVI: Über einige neue Inhaltsstoffe aus dem Tribus Anthemideae (1965)
    Weinheim : Wiley-Blackwell
    Berichte der deutschen chemischen Gesellschaft 98 (1965), S. 1411-1415 
    Details
    ISSN: 0009-2940
    Keywords: Chemistry ; Inorganic Chemistry
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Notes: Aus Vertretern des Tribus Anthemideae werden fünf neue Acetylenverbindungen isoliert und in ihrer Struktur aufgeklärt. Für ein neues Furanpolyin wird eine Synthese angegeben. Die bisher unklare Konfiguration der entsprechenden Dihydroverbindung wird gesichert.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/cber.19650980509
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  • 8
    Electronic Resource
    Electronic Resource
    Zur Synthese substituierter Pyridone durch Dehydrierung (1966)
    Weinheim : Wiley-Blackwell
    Berichte der deutschen chemischen Gesellschaft 99 (1966), S. 445-449 
    Details
    ISSN: 0009-2940
    Keywords: Chemistry ; Inorganic Chemistry
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Notes: Beide desmotropen Formen von Piperidon-(4)-dicarbonsäureestern werden mit Chrom(VI)-oxid oder mit Cer(IV)-sulfat zu entsprechend substituierten Pyridonen-(4) dehydriert. Bei ihren N-Alkyl-Derivaten tritt als Nebenreaktion N-Desalkylierung ein. Die Struktur der Pyridone wird IR-spektroskopisch untersucht.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/cber.19660990211
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  • 9
    Electronic Resource
    Electronic Resource
    Redoxreaktionen zwischen Tri-tert-butylphosphin und Element(IVb)-tetrachloriden: Tri-tert-butylchlorphosphonium-Salze (1976)
    Weinheim : Wiley-Blackwell
    Berichte der deutschen chemischen Gesellschaft 109 (1976), S. 3017-3024 
    Details
    ISSN: 0009-2940
    Keywords: Chemistry ; Inorganic Chemistry
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Description / Table of Contents: Redox Reactions between Tri-tert-butylphosphine and Element(IVb)-Tetrachlorides: Tri-tert-butylchlorophosphonium SaltsTri-tert-butylphosphine reacts with equimolare amounts of germaniumtetrachloride or tintetrachloride yielding new compounds with the formula (t-C4H9)3PMCl4 (M=Ge, Sn). The Comparison of n. m. r., infrared-, and raman spectra as well as the conductivities with the corresponding data of tri-tert-butyldichlorophosphorane, prepared, using tri-tert-butylphosphine and Chlorine, indicates, that all these compounds are tri-tert-butylchlorophosphine salts. Tri-tert-butyl-chlorophosphonium salts are also available, by the reaction of tri-tert-butyldichlorophosphorane with various element chlorides.
    Notes: Tri-tert-butylphosphin reagiert mit Germaniumtetrachlorid und Zinntetrachlorid im Molverhältnis 1:1 zu neuen Verbindungen der Zusammensetzung (t-C4H9)3PMCl4 (M=Ge, Sn). Der Vergleich von Kernresonanz- und Schwingungsspektren sowie von Leitfähigkeiten mit den entsprechenden Daten von Tri-tert-butyldichlorphosphoran, das aus Tri-tert-butylphosphin mit elementarem Chlor erhalten wurde, zeigt, daß die Verbindungen als Tri-tert-butylchlor-phosphonium-Salze vorliegen. Weitere Verbindungen dieses Typs sind aus Tri-tert-butyldichlor-phosphoran mit verschiedenen Elementchloriden zugänglich.
    Additional Material: 2 Tab.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/cber.19761090906
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  • 10
    Electronic Resource
    Electronic Resource
    Reaktionen an komplexgebundenen Carbenanalogen, II: Synthese und Schwingungsspektren von Pentacarbonyl[chlor-(di-tert-butylphosphino)stannylen]metall(VI A)-Komplexen (1978)
    Weinheim : Wiley-Blackwell
    Berichte der deutschen chemischen Gesellschaft 111 (1978), S. 2267-2272 
    Details
    ISSN: 0009-2940
    Keywords: Chemistry ; Inorganic Chemistry
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Description / Table of Contents: Reactions of Complex-bound Carbene Analogues, II: Synthesis and Vibrational Spectra of Pentacarbonyl[chloro(di-tert-butylphosphino)stannio]-metal(VI A) ComplexesThe tindichloride complexes pentacarbonyl(dichlorotetrahydrofurane-stannio)chromium(0) (1), -molybdenum(0) (2) and -tungsten(0) (3) react with di-tert-butyl(trimethylsilyl)phosphine with elimination of tetrahydrofurane and formation of chlorotrimethylsilane to give the new, base free stannio complexes (CO)5M—Sn(Cl)[P(tBu)2] (4-6: M = Cr, Mo, W) with 75 to 85% yield. The ligand properties of chloro(di-tert-butylphosphino)-stannandiyl (-stannylene) are discussed on the basis of infrared and Raman data, and other physical properties.
    Notes: Die SnCl2-Metallkomplexe Pentacarbonyl(dichlortetrahydrofuran-stannio)chrom(0) (1), -molybdän(0) (2) und -wolfram(0) (3) reagieren mit Di-tert-butyl(trimethylsilyl)phosphin unter Verdrängung von Tetrahydrofuran und Eliminierung von Chlortrimethylsilan, wobei die neuen basenfreien Stannylenkomplexe (CO)5M—Sn(Cl)[P(tBu)2] (4-6: M = Cr, Mo, W) in 75-85 proz. Ausbeute erhalten werden. Die Ligandeneigenschaften von Chlor(di-tert-butylphosphio)stanandiyl (-stannylen) werden anhand von IR- und Raman-Daten sowie der physikalischen Eigenschaften von Ligand und Komplexen diskutiert.
    Additional Material: 1 Tab.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/cber.19781110621
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