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  • Other Sources  (249)
  • American Chemical Society
  • American Institute of Physics (AIP)
  • Oxford University Press
  • Periodicals Archive Online (PAO)
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  • 1
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    A Guide to Remote Sensing Interpreting Images of the Earth (1990)
    Oxford University Press
    In:  Oxford, Oxford University Press, vol. 16B, no. 2, pp. 125-169, (ISBN: 3-7643-7143-9)
    Details
    Publication Date: 1990
    Keywords: Textbook of geophysics ; Textbook of geology
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    BIBLIOGRAPHY SEISMOLOGY
  • 2
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    Nuclear Weapons Tests: Prohibition or Limitation? (1988)
    Oxford University Press
    In:  Dordrecht, 358 pp., Oxford University Press, vol. 10, no. Subvol. b, pp. 220, (ISBN 1-4020-0653-5)
    Details
    Publication Date: 1988
    Keywords: Nuclear explosion
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    BIBLIOGRAPHY SEISMOLOGY
  • 3
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    Doing Science (2001)
    Oxford University Press
    In:  New York, 294 pp., Oxford University Press, vol. 26, no. ALEX(01)-FR-77-01, AFTAC Contract F08606-76-C-0025, pp. 329, (ISBN 0-521-62434-7 hc (0-521-62478-9 pb))
    Details
    Publication Date: 2001
    Keywords: outreach ; communication ; publishing
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    BIBLIOGRAPHY SEISMOLOGY
  • 4
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    The Geology of Earthquakes (1997)
    Oxford University Press
    In:  New York, Oxford University Press, vol. 4, no. 1, pp. 1-40, (ISBN: 1-4020-1348-5 hb, ISBN: 1-4020-1349-3 pb)
    Details
    Publication Date: 1997
    Keywords: Textbook of geology ; Seismology ; Tectonics ; Crustal deformation (cf. Earthquake precursor: deformation or strain) ; Earthquake hazard ; Earthquake risk ; Induced seismicity ; Magnitude ; Maximum likelihood
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    BIBLIOGRAPHY SEISMOLOGY
  • 5
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    Unusual marine unicellular symbiosis with the nitrogen-fixing cyanobacterium UCYN-A (2016)
    Springer Nature
    In:  Nature Microbiology, 2 (16214).
    Details
    Publication Date: 2020-06-24
    Description: Nitrogen fixation — the reduction of dinitrogen (N2) gas to biologically available nitrogen (N) — is an important source of N for terrestrial and aquatic ecosystems. In terrestrial environments, N2-fixing symbioses involve multicellular plants, but in the marine environment these symbioses occur with unicellular planktonic algae. An unusual symbiosis between an uncultivated unicellular cyanobacterium (UCYN-A) and a haptophyte picoplankton alga was recently discovered in oligotrophic oceans. UCYN-A has a highly reduced genome, and exchanges fixed N for fixed carbon with its host. This symbiosis bears some resemblance to symbioses found in freshwater ecosystems. UCYN-A shares many core genes with the 'spheroid bodies' of Epithemia turgida and the endosymbionts of the amoeba Paulinella chromatophora. UCYN-A is widely distributed, and has diversified into a number of sublineages that could be ecotypes. Many questions remain regarding the physical and genetic mechanisms of the association, but UCYN-A is an intriguing model for contemplating the evolution of N2-fixing organelles.
    Type: Article , PeerReviewed
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    PAPER (OCEANREP)
  • 6
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    Structure of an F430 Variant from Archaea Associated with Anaerobic Oxidation of Methane (2008)
    American Chemical Society
    In:  Journal of the American Chemical Society, 130 (32). pp. 10758-10767.
    Details
    Publication Date: 2020-07-16
    Description: Microbial mats collected at cold methane seeps in the Black Sea carry out anaerobic oxidation of methane (AOM) to carbon dioxide using sulfate as the electron acceptor. These mats, which predominantly consist of sulfate-reducing bacteria and archaea of the ANME-1 and ANME-2 type, contain large amounts of proteins very similar to methyl-coenzyme M reductase from methanogenic archaea. Mass spectrometry of mat samples revealed the presence of two nickel-containing cofactors in comparable amounts, one with the same mass as coenzyme F430 from methanogens (m/z = 905) and one with a mass that is 46 Da higher (m/z = 951). The two cofactors were isolated and purified, and their constitution and absolute configuration were determined. The cofactor with m/z = 905 was proven to be identical to coenzyme F430 from methanogens. For the m/z = 951 species, high resolution ICP-MS pointed to F430 + CH2S as the molecular formula, and LA-ICP-SF MS finally confirmed the presence of one sulfur atom per nickel. Esterification gave two stereoisomeric pentamethyl esters with m/z = 1021, which could be purified by reverse phase HPLC and were subjected to comprehensive NMR analysis, allowing determination of their constitution and configuration as (172S)−172-methylthio-F430 pentamethyl ester and (172R)−172-methylthio-F430 pentamethyl ester. The corresponding diastereoisomeric pentaacids could also be separated by HPLC and were correlated to the esters via mild hydrolysis of the latter. Equilibration of the pentaacids under acid catalysis showed that the (172S) isomer is the naturally occurring albeit thermodynamically less stable one. The more stable (172R) isomer (80% at equilibrium) is an isolation artifact generated under the acidic conditions necessary for the isolation of the cofactors from the calcium carbonate-encrusted mats.
    Type: Article , PeerReviewed
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  • 7
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    Key Findings of the World’s First Offshore Methane Hydrate Production Test off the Coast of Japan: Toward Future Commercial Production (2017)
    American Chemical Society
    In:  Energy & Fuels, 31 (3). pp. 2607-2616.
    Details
    Publication Date: 2017-11-20
    Description: Marine methane hydrate in sands has huge potential as an unconventional gas resource; however, no field test of their production potential had been conducted. Here, we report the world’s first offshore methane hydrate production test conducted at the eastern Nankai Trough and show key findings toward future commercial production. Geological analysis indicates that hydrate saturation reaches 80% and permeability in the presence of hydrate ranges from 0.01 to 10 mdarcies. Permeable (1–10 mdarcies) highly hydrate-saturated layers enable depressurization-induced gas production of approximately 20,000 Sm3/D with water of 200 m3/D. Numerical analysis reveals that the dissociation zone expands laterally 25 m at the front after 6 days. Gas rate is expected to increase with time, owing to the expansion of the dissociation zone. It is found that permeable highly hydrate-saturated layers increase the gas–water ratio of the production fluid. The identification of such layers is critically important to increase the energy efficiency and the technical feasibility of depressurization-induced gas production from hydrate reservoirs.
    Type: Article , PeerReviewed
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  • 8
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    Enantiomeric Discorhabdin Alkaloids and Establishment of Their Absolute Configurations Using Theoretical Calculations of Electronic Circular Dichroism Spectra (2008)
    American Chemical Society
    In:  The Journal of Organic Chemistry, 73 (22). pp. 9133-9136.
    Details
    Publication Date: 2020-05-11
    Type: Article , PeerReviewed
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    PAPER (OCEANREP)
  • 9
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    Optical Interpretation of the Chemical Process of CH4–CO2 Exchange and Its Application to Gas Hydrate Production (2015)
    American Chemical Society
    In:  Journal of Physical Chemistry C, 119 (37). pp. 21353-21357.
    Details
    Publication Date: 2020-07-20
    Description: The guest-exchange method (or replacement) for methane production from gas hydrates has recently received attention because it can be used for both carbon dioxide sequestration and methane production. The structure of gas hydrates is maintained as a structure I (sI) hydrate while methane molecules are exchanged with carbon dioxide. In this study, CH4 + CO2 mixed gas hydrates were examined under terahertz light at various temperatures to simulate CH4–CO2 exchange reactions. Each gas hydrate composition examined was a representative composition at each step of the exchange reaction. The molecular composition was also accurately analyzed by gas chromatography. Refractive indices calculated by the terahertz time-domain spectroscopy (THz-TDS) of gas hydrate samples were correlated to the guest composition, and this novel method was proven to be used to quantify the extent of replacement via optical constant. Furthermore, changes in the water framework from the sI hydrate to ice using THz-TDS were investigated with an increasing temperature. Overall, this study reveals the process of guest exchange and phase transition from a gas hydrate to ice via the optical properties in the terahertz region, and it offers a powerful tool in gas hydrate production.
    Type: Article , PeerReviewed
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  • 10
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    Essential Fatty Acids in the Diet of Rainbow Trout (Salmo gairdneri): Growth, Feed Conversion and Some Gross Deficiency Symptoms (1972)
    Oxford University Press
    In:  The Journal of Nutrition, 102 (1). pp. 77-85.
    Details
    Publication Date: 2018-04-18
    Description: Experiments are described to define further the fatty acid requirements of rainbow trout (Salmo gairdneri). In all cases, feeding semipurified diets containing no polyunsaturated fatty acids resulted in poor growth and feed conversion. Linolenic acid was superior to linoleic in stimulating growth and improving feed conversion. The requirement of linolenic acid (ω3 fatty acids) for rainbow trout is 1% of the diet or approximately 2.7% of the dietary calories. Essential fatty acid deficiency symptoms that were cured or prevented by linolenic acid included fin erosion, heart myopathy, and a shock syndrome. It is concluded that linolenic acid has an essential role in rainbow trout similar to that assigned to linoleic acid in man and higher animals.
    Type: Article , PeerReviewed
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