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  • Polymer and Materials Science  (3)
  • Water Pollution  (3)
  • 1
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    Ecology. Are U.S. coral reefs on the slippery slope to slime? (2005)
    American Association for the Advancement of Science (AAAS)
    Details
    Publication Date: 2005-03-19
    Description: 〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Pandolfi, J M -- Jackson, J B C -- Baron, N -- Bradbury, R H -- Guzman, H M -- Hughes, T P -- Kappel, C V -- Micheli, F -- Ogden, J C -- Possingham, H P -- Sala, E -- New York, N.Y. -- Science. 2005 Mar 18;307(5716):1725-6.〈br /〉〈span class="detail_caption"〉Author address: 〈/span〉Centre for Marine Studies and Department of Earth Sciences, University of Queensland, St. Lucia, QLD 4072, Australia. j.pandolfi@uq.edu.au〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/15774744" target="_blank"〉PubMed〈/a〉
    Keywords: Animals ; *Anthozoa ; Biodiversity ; Biomass ; Conservation of Natural Resources ; *Ecosystem ; Eutrophication ; Fishes ; Food Chain ; Greenhouse Effect ; International Cooperation ; Public Policy ; United States ; Water Pollution
    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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    Impacts of biodiversity loss on ocean ecosystem services (2006)
    American Association for the Advancement of Science (AAAS)
    Details
    Publication Date: 2006-11-04
    Description: Human-dominated marine ecosystems are experiencing accelerating loss of populations and species, with largely unknown consequences. We analyzed local experiments, long-term regional time series, and global fisheries data to test how biodiversity loss affects marine ecosystem services across temporal and spatial scales. Overall, rates of resource collapse increased and recovery potential, stability, and water quality decreased exponentially with declining diversity. Restoration of biodiversity, in contrast, increased productivity fourfold and decreased variability by 21%, on average. We conclude that marine biodiversity loss is increasingly impairing the ocean's capacity to provide food, maintain water quality, and recover from perturbations. Yet available data suggest that at this point, these trends are still reversible.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Worm, Boris -- Barbier, Edward B -- Beaumont, Nicola -- Duffy, J Emmett -- Folke, Carl -- Halpern, Benjamin S -- Jackson, Jeremy B C -- Lotze, Heike K -- Micheli, Fiorenza -- Palumbi, Stephen R -- Sala, Enric -- Selkoe, Kimberley A -- Stachowicz, John J -- Watson, Reg -- New York, N.Y. -- Science. 2006 Nov 3;314(5800):787-90.〈br /〉〈span class="detail_caption"〉Author address: 〈/span〉Department of Biology, Dalhousie University, Halifax, NS, Canada B3H 4J1. bworm@dal.ca〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/17082450" target="_blank"〉PubMed〈/a〉
    Keywords: Animals ; *Biodiversity ; Conservation of Natural Resources ; Databases, Factual ; *Ecosystem ; Eukaryota ; *Fisheries ; *Fishes ; Forecasting ; Invertebrates ; Oceans and Seas ; Plants ; Population Dynamics ; Seafood ; Seawater ; Water Pollution
    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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    Depletion, degradation, and recovery potential of estuaries and coastal seas (2006)
    American Association for the Advancement of Science (AAAS)
    Details
    Publication Date: 2006-06-24
    Description: Estuarine and coastal transformation is as old as civilization yet has dramatically accelerated over the past 150 to 300 years. Reconstructed time lines, causes, and consequences of change in 12 once diverse and productive estuaries and coastal seas worldwide show similar patterns: Human impacts have depleted 〉90% of formerly important species, destroyed 〉65% of seagrass and wetland habitat, degraded water quality, and accelerated species invasions. Twentieth-century conservation efforts achieved partial recovery of upper trophic levels but have so far failed to restore former ecosystem structure and function. Our results provide detailed historical baselines and quantitative targets for ecosystem-based management and marine conservation.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Lotze, Heike K -- Lenihan, Hunter S -- Bourque, Bruce J -- Bradbury, Roger H -- Cooke, Richard G -- Kay, Matthew C -- Kidwell, Susan M -- Kirby, Michael X -- Peterson, Charles H -- Jackson, Jeremy B C -- New York, N.Y. -- Science. 2006 Jun 23;312(5781):1806-9.〈br /〉〈span class="detail_caption"〉Author address: 〈/span〉Biology Department, Dalhousie University, 1355 Oxford Street, Halifax, NS, Canada B3H 4J1. hlotze@dal.ca〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/16794081" target="_blank"〉PubMed〈/a〉
    Keywords: Animals ; *Biodiversity ; Conservation of Natural Resources/*history ; *Ecosystem ; Environment ; Eutrophication ; Geography ; History, 18th Century ; History, 19th Century ; History, 20th Century ; History, 21st Century ; History, Ancient ; History, Medieval ; Human Activities/history ; Humans ; *Invertebrates ; Plants ; Population Density ; Population Dynamics ; *Seawater ; *Vertebrates ; *Water ; Water Pollution
    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-Wavelength switching of luciferase activity using caged compounds (1994)
    New York, NY [u.a.] : Wiley-Blackwell
    Advanced Materials for Optics and Electronics 4 (1994), S. 349-354 
    Details
    ISSN: 1057-9257
    Keywords: Chemistry ; Polymer and Materials Science
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Electrical Engineering, Measurement and Control Technology , Physics
    Notes: Firefly luciferase, luciferin, 1-(3,4-dimethoxy-6-nitrophenyl) elthyl ATP and 1-(2-nitrophenyl) ethyl acetic acid were immobilised in an agarose gel matrix. By illuminating the gel with 350 nm light through a mask, a positive bioluminescent pattern was written on to the gel by releasing ATP in the illuminated areas. The gel was then illuminated with a brpadbnand UV light through a second mask to release acetic acid, lowering the local pH and deactivating the enzyme. This produced a negative image of the second mask superimposed on the positive image of the first mask.The system represents a two-wavelength switch in which one wavelength of light activates the enzyme while a second deactivates it. This demonstrates the feasibility of using biological molecules as logic element in future devices.
    Additional Material: 5 Ill.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/amo.860040506
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  • 5
    Electronic Resource
    Electronic Resource
    Prototype pattern recognition devices using firefly luciferase (1994)
    New York, NY [u.a.] : Wiley-Blackwell
    Advanced Materials for Optics and Electronics 4 (1994), S. 381-386 
    Details
    ISSN: 1057-9257
    Keywords: Chemistry ; Polymer and Materials Science
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Electrical Engineering, Measurement and Control Technology , Physics
    Additional Material: 6 Ill.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/amo.860040510
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  • 6
    Electronic Resource
    Electronic Resource
    The polymerization of epoxides by metal halide catalysts (1959)
    Hoboken, NJ : Wiley-Blackwell
    Journal of Polymer Science 34 (1959), S. 171-179 
    Details
    ISSN: 0022-3832
    Keywords: Chemistry ; Polymer and Materials Science
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology , Physics
    Notes: Ethylene, propylene, and styrene oxides have been polymerized by a range of metal halide catalysts, high molecular weight products being obtained from the two firstnamed. The limited quantitative evidence presented is consistent with the view that these polymerizations proceed by a coordinate propagation mechanism. The effective catalyst for this stage is essentially a metal alkoxide, formed in an initial cationic polymerization in which a small number of monomer units are attached to the metal atom. The propylene oxide polymers generally contain a fraction of crystalline material, but the proportion of this can be reduced practically to zero (with FeCl3 catalysis) by careful exclusion of water.
    Additional Material: 4 Tab.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/pol.1959.1203412715
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