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  • 1
    facet.materialart.12
    [Cham] : Springer
    Call number: 9783319540542 (e-book)
    Description / Table of Contents: Do you know silica, the tetrahedra of silicon and oxygen constituting the crystals of New Agers and the desiccant in a box of new shoes? It's no mere mundane mineral. As chemically reacting silicate rocks, silica set off the chain of events known as the origin of life. As biomineralized opal, it is the cell wall, skeleton, spicules, and scales of organisms ornamenting numerous lobes of the tree of life. Cryptocrystalline silica made into stone tools helped drive the evolution of our hands and our capability for complex grammar, music, and mathematics. As quartz crystals, silica is impressively electric and ubiquitous in modern technology (think sonar, radios, telephones, ultrasound, and cheap but precise watches). Silica is inescapable when we take a drink or mow the lawn and it has already started to save the Earth from the carbon dioxide we're spewing into the atmosphere. This book tells these scientific tales and more, to give dear, modest silica its due.
    Type of Medium: 12
    Pages: 1 Online-Ressource (xi, 201 Seiten) , Illustrationen
    ISBN: 9783319540542 , 978-3-319-54054-2
    Language: English
    Note: Contents 1 A Brief Introduction to the Players 1.1 Silicon 1.2 Silica 1.3 Silicic Acid 1.4 Silicate 1.5 Silicone 2 The Origin of Life Was Brought to You in Part by Silicate Rocks 2.1 Setting the Stage 2.2 A Flight of Fancy 2.3 The Early Earth Was Not Hellacious 2.4 A Fly in the Soup 2.5 The Lost City 2.6 Generating Organic Compounds 2.7 Inventing Metabolism 2.8 The World’s Earliest Biological Carbon Fixation 2.9 Replication Further Reading 3 The Making of Humankind: Silica Lends a Hand (and Maybe a Brain) 3.1 Stone Tools and Their Makers 3.1.1 The Earliest Stone Tools 3.1.2 The Oldowan Industry and Its Practitioners 3.1.3 The Acheulean Industry and Its Practitioners 3.1.4 Neanderthals and the Levallois Technique 3.1.5 Homo sapiens 3.2 Hands and Brains 3.2.1 Give Us a Hand 3.2.2 If I Only Had a Brain Further Reading 4 Mystical Crystals of Silica 4.1 What Is a Crystal? 4.2 Pyroelectricity 4.3 Piezoelectricity 4.4 Sonar 4.5 Quartz Oscillators 4.6 But Why Is There a Piezoelectric Effect? Further Reading 5 Glass Houses and Nanotechnology 5.1 Silica-Centric Musings on the Origin of Biomineralization 5.2 The Early Fossil Record of Silica Biomineralization 5.3 Not All Biomineralization Is Silica Biomineralization 5.4 The World’s First Arms Race 5.5 How to Make a Glass House: Man Versus Nature 5.5.1 Man 5.5.2 Nature 5.6 Some Silica Biomineralizing Organisms that We Are Learning From 5.6.1 Choanoflagellates 5.6.2 Siliceous Sponges 5.6.3 Diatoms 5.7 Siliceous Nanotechnology Further Reading 6 Chicks Need Silica, Too 6.1 It’s All About the Chicks 6.2 Silicosis 6.3 The Dog Days of Silica Medical Research 6.4 Collagen 6.5 Do Human Beings Require Silica? 6.6 To Supplement or not to Supplement 6.7 Silica, Aluminum, and Alzheimer’s Disease Further Reading 7 Of Fields, Phytoliths, and Sewage 7.1 All Plants Have Silica 7.2 Opal Phytoliths 7.3 The Benefits of Opal Phytoliths and of Dissolved Silica 7.4 Is Silica an Essential Plant Nutrient? 7.5 Impact of Agriculture on the Silica Cycle 7.6 The Growing Creep of Silica Removal 7.7 Let’s Go for a Walk Through Time 7.8 Silica in Sewage 7.9 A Plea for Hardy Souls Further Reading 8 Silica, Be Dammed! 8.1 To Put It in a Nutshell 8.2 A Brief History of Human Damming, or How Long Has This Been Going on 8.3 Dams and Silica 8.4 Dams, Eutrophication, and Silica 8.5 Case Study #1: The Laurentian Great Lakes 8.6 Case Study #2: The Baltic Sea 8.7 Case Study #3: The Black Sea 8.8 The Global View Further Reading 9 The Venerable Silica Cycle 9.1 The Silica Cycle 9.2 Silicate Weathering 9.3 Getting Silica from Continent to Ocean 9.4 The Weathering of Oceanic Crust 9.5 Silica Biomineralization in the Ocean 9.6 Silica’s Return to the Mantle 9.7 The Earth’s Early Ocean Was a Tremendously Siliceous Place 9.8 Silica, Cyanobacteria, and Banded Iron Formations 9.9 And then Along Came True Silica Biomineralization Further Reading 10 Silica Saves the Day 10.1 The Goldilocks Zone 10.2 Most of Us Can Model 10.2.1 The Warmth of the Sun 10.2.2 Albedo, Which Is Not a Pasta Sauce 10.2.3 Emissivity 10.3 The Importance of Greenhouse Gases 10.4 Silicate Weathering Consumes Carbon Dioxide 10.5 The Temperature Dependence of Silicate Weathering 10.6 The Paleocene-Eocene Thermal Maximum 10.7 Enhanced Weathering Further Reading
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  • 2
    Electronic Resource
    Electronic Resource
    [s.l.] : Nature Publishing Group
    Nature 443 (2006), S. 920-921 
    ISSN: 1476-4687
    Source: Nature Archives 1869 - 2009
    Topics: Biology , Chemistry and Pharmacology , Medicine , Natural Sciences in General , Physics
    Notes: [Auszug] Reconstructing past ocean temperatures is an obsession for many Earth scientists. That's understandable — such data provide insights into climate and its links to biogeochemical cycling, ocean circulation and tectonics, not to mention mass extinctions, evolutionary radiations, and other ups ...
    Type of Medium: Electronic Resource
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  • 3
    Publication Date: 2023-05-12
    Keywords: Area/locality; DEPTH, water; LATITUDE; LONGITUDE; δ44Ca; δ44Ca, standard deviation
    Type: Dataset
    Format: text/tab-separated-values, 12 data points
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  • 4
    Publication Date: 2023-06-27
    Keywords: AGE; ANT-XI/4; AWI_Paleo; Calculated; Carbon/Nitrogen ratio; Conrad Rise; DEPTH, sediment/rock; KL; Mass spectrometer Finnigan MAT 252; Paleoenvironmental Reconstructions from Marine Sediments @ AWI; Piston corer (BGR type); Polarstern; PS2606-6; PS30; PS30/144; δ13C, opal; δ15N, opal
    Type: Dataset
    Format: text/tab-separated-values, 156 data points
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  • 5
    Publication Date: 2023-06-27
    Keywords: AGE; ANT-VIII/3; AWI_Paleo; Calculated; Carbon/Nitrogen ratio; DEPTH, sediment/rock; Gravity corer (Kiel type); Mass spectrometer Finnigan MAT 252; Paleoenvironmental Reconstructions from Marine Sediments @ AWI; Polarstern; PS16; PS16/372; PS1786-1; SL; South Sandwich Trough; δ13C, opal; δ15N, opal
    Type: Dataset
    Format: text/tab-separated-values, 75 data points
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  • 6
    Publication Date: 2023-06-27
    Keywords: AGE; ANT-XVIII/5a; AWI_Paleo; Calculated; Carbon/Nitrogen ratio; DEPTH, sediment/rock; KL; Mass spectrometer Finnigan MAT 252; Paleoenvironmental Reconstructions from Marine Sediments @ AWI; Piston corer (BGR type); Polarstern; PS58; PS58/271-1; Southeast Pacific; δ13C, opal; δ15N, opal
    Type: Dataset
    Format: text/tab-separated-values, 126 data points
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  • 7
    facet.materialart.
    Unknown
    PANGAEA
    In:  Supplement to: Jacot des Combes, Hélène; Esper, Oliver; De La Rocha, Christina L; Abelmann, Andrea; Gersonde, Rainer; Yam, Ruth; Shemesh, Aldo (2008): Diatom d13C, d15N, and C/N since the Last Glacial Maximum in the Southern Ocean: Potential impact of species composition. Paleoceanography, 23(4), PA4209, https://doi.org/10.1029/2008PA001589
    Publication Date: 2023-06-27
    Description: Measurements of delta 13C, delta 15N, and C/N on diatom-bound organic matter were made over the Holocene and Last Glacial Maximum (LGM) from 3 piston cores in the Southern Ocean, one from each of the three sectors. The site in the Scotia Sea differed considerably from the other two sites by having markedly lower delta 13C, more variable delta 15N and C/N ratios, and a sedimentary diatom assemblage that was never dominated by Fragilariopsis kerguelensis. Although environmental parameters certainly have a strong impact on the isotope ratios, delta 13C is also correlated to the proportion of F. kerguelensis in the 3 cores investigate here (r**2 = 0.8). Extreme values of delta 13C, delta 15N, and C/N at the Last Glacial Maximum were also related to the abundance of winter stages of Eucampia antarctica. These results suggest that diatom specific isotope records should be interpreted in conjunction with information on the species composition of the samples.
    Keywords: ANT-VIII/3; ANT-XI/4; ANT-XVIII/5a; AWI_Paleo; Conrad Rise; Gravity corer (Kiel type); KL; Paleoenvironmental Reconstructions from Marine Sediments @ AWI; Piston corer (BGR type); Polarstern; PS16; PS16/372; PS1786-1; PS2606-6; PS30; PS30/144; PS58; PS58/271-1; SL; Southeast Pacific; South Sandwich Trough
    Type: Dataset
    Format: application/zip, 4 datasets
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  • 8
    Publication Date: 2023-06-27
    Keywords: Age, 14C AMS; Age, 14C calibrated; Age, dated; Age, dated, error to older; Age, dated, error to younger; ANT-VIII/3; ANT-XI/4; ANT-XVIII/5a; AWI_Paleo; Calendar age; Conrad Rise; Depth, bottom/max; DEPTH, sediment/rock; Depth, top/min; Elevation of event; Event label; Gravity corer (Kiel type); KL; Laboratory code/label; Latitude of event; Longitude of event; Paleoenvironmental Reconstructions from Marine Sediments @ AWI; Piston corer (BGR type); Polarstern; PS16; PS16/372; PS1786-1; PS2606-6; PS30; PS30/144; PS58; PS58/271-1; Reservoir effect/correction; SL; Southeast Pacific; South Sandwich Trough
    Type: Dataset
    Format: text/tab-separated-values, 104 data points
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  • 9
    facet.materialart.
    Unknown
    PANGAEA
    In:  Centre National de la Recherche Scientifique
    Publication Date: 2023-07-05
    Description: The goal of this work has been to examine the influence of upper ocean food web structure and functioning on both the natural and artificially enhanced sequestration of carbon within the ocean. Data obtained in the mesocosm experiment run in the Bay of Hopavågen in August 2012 are used to assess the extent to which organic matter produced within four different food webs is retained in the upper ocean food web versus remineralized back to carbon dioxide and inorganic nutrients (ammonium, dissolved silicon, phosphate) versus exported from the system in the form of rapidly sinking particles. The experiment was carried out in a set of 12 mesocosms covering, in triplicate, 2 different phytoplankton communities (diatom versus non-diatom) exposed to 2 different zooplankton communities (-copepod and +copepod). These starting conditions were established by first filling the bags, roughly simultaneously, with seawater from the Bay of Hopavågen. Mesozooplankton were then removed to the most complete extent possible immediately removed from half of the mesocosms through repeated vertical hauls of a plankton net (200 µm mesh). Nitrate and phosphate was added to half mesocosms daily to promote the growth of non-siliceous phytoplankton (e.g. dinoflagellates or coccolithophores). To the other half of the mesocosms, nitrate, phosphate, and silicate were added to promote the growth of diatoms. Material was allowed to settle and the two distinct phytoplankton populations were allowed to develop for 4 days, after which copepods collected from the Bay of Hopavågen were added back to the half of the N+P mesocosms and to the half of the N+P+Si mesocosms from which mesozooplankton had not been removed at the beginning. This yielded a set of four initial starting conditions (N+P-copepods, N+P+copepods, N+P+Si-copepods, and N+P+Si+copepods). In the primary mesocosms, samples for a set of core parameters were taken every time the mesocosms were sampled. Samples for particulates (PIC, BSi, POC, PON) were collected on GF/F or 0.4 µm polycarbonate.
    Keywords: Ammonium; Basin Scale Analysis, Synthesis and Integration; Biogenic silica; Carbon, organic, dissolved; Carbon, organic, particulate; Chlorophyll a; Colorimetry; Depth, bottom/max; Depth, top/min; DEPTH, water, experiment; Element analyzer, Thermo Quest Flash 1112; EURO-BASIN; Experiment; Experimental treatment; High Performance Liquid Chromatography (HPLC); HOPA-2012; MESO; Mesocosm experiment; Nitrate; Nitrite; Nitrogen, organic, dissolved; Nitrogen, organic, particulate; Norwegian fjord; Phosphate; Silicate; Spectrophotometer Shimadzu UV-1700; Technicon Autoanalyser (Tréguer & Le Corre, 1975); TOC analyzer (Shimadzu); Treatment: duration
    Type: Dataset
    Format: text/tab-separated-values, 1142 data points
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  • 10
    Publication Date: 2023-07-10
    Description: This dataset contains stable Si isotope values from radiolarian tests and sponge spicules analyzed on MC-ICP-MS and SIMS. These are in association with a study aiming at investigating the changes to the Si cycle during the Paleocene-Eocene Thermal Maximum from siliceous microfossils from ODP hole 1051B.
    Keywords: 171-1051B; Age, relative; Blake Nose, North Atlantic Ocean; Depth, composite; DRILL; Drilling/drill rig; Joides Resolution; Laboratory; Leg171B; Multi-collector inductively coupled plasma mass spectrometer (MC-ICP-MS); Number; PETM; Radiolarians; Radiolarians, δ30Si; Radiolarians, δ30Si, standard deviation; Sample code/label; Secondary ion mass spectrometry (SIMS); silicon isotope; sponge; Sponge spiculae, δ30Si; Sponge spiculae, δ30Si, standard deviation
    Type: Dataset
    Format: text/tab-separated-values, 676 data points
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