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  • 1
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    Spatial variations in the frequency-magnitude distribution of earthquakes at Mount Pinatubo volcano (2004)
    In:  Bull. Seism. Soc. Am., Basel, Inst. f. Geophys., Ruhr-Univ. Bochum, vol. 94, no. 2, pp. 430-438, pp. 1009, (ISSN: 1340-4202)
    Details
    Publication Date: 2004
    Keywords: Seismology ; Inhomogeneity ; Seismicity ; Gutenberg-Richter magnitude frequency b-value ; Magnitude ; Volcanology ; BSSA ; Galis
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    BIBLIOGRAPHY SEISMOLOGY
  • 2
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    Direct regulation of Escherichia coli ribosomal protein promoters by the transcription factors ppGpp and DksA [Genetics] (2011)
    National Academy of Sciences
    Details
    Publication Date: 2011-04-06
    Description: We show here that the promoters for many of the Escherichia coli ribosomal protein operons are regulated directly by two transcription factors, the small RNA polymerase-binding protein DksA and the nutritional stress-induced nucleotide ppGpp. ppGpp and DksA work together to inhibit transcription initiation from ribosomal protein promoters in vitro and in vivo. The degree of promoter regulation by ppGpp/DksA varies among the r-protein promoters, but some are inhibited almost as much as rRNA promoters. Thus, many r-protein operons are regulated at the level of transcription in addition to their control by the classic translational feedback systems discovered ~30 y ago. We conclude that direct control of r-protein promoters and rRNA promoters by the same signal, ppGpp/DksA, makes a major contribution to the balanced and coordinated synthesis rates of all of the ribosomal components.
    Print ISSN: 0027-8424
    Electronic ISSN: 1091-6490
    Topics: Biology , Medicine , Natural Sciences in General
    Published by National Academy of Sciences
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  • 3
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    Geometry effects on Rayleigh-Bénard convection in rotating annular layers (2014)
    American Physical Society (APS)
    Details
    Publication Date: 2014-06-24
    Description: Author(s): J. J. Sánchez-Álvarez, E. Serre, E. Crespo del Arco, and F. H. Busse Rayleigh-Bénard convection is investigated in rotating annular cavities at a moderate dimensionless rotation rate Ω=60. The onset of convection is in the form of azimuthal traveling waves that set in at the sidewalls and at values of the Rayleigh number significantly below the value of the onset of ... [Phys. Rev. E 89, 063013] Published Mon Jun 23, 2014
    Keywords: Fluid Dynamics
    Print ISSN: 1539-3755
    Electronic ISSN: 1550-2376
    Topics: Physics
    Published by American Physical Society (APS)
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  • 4
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    Periodically triggered seismicity at Mount Wrangell, Alaska, after the Sumatra earthquake (2005)
    American Association for the Advancement of Science (AAAS)
    Details
    Publication Date: 2005-05-21
    Description: As surface waves from the 26 December 2004 earthquake in Sumatra swept across Alaska, they triggered an 11-minute swarm of 14 local earthquakes near Mount Wrangell, almost 11,000 kilometers away. Earthquakes occurred at intervals of 20 to 30 seconds, in phase with the largest positive vertical ground displacements during the Rayleigh surface waves. We were able to observe this correlation because of the combination of unusually long surface waves and seismic stations near the local earthquakes. This phase of Rayleigh wave motion was dominated by horizontal extensional stresses reaching 25 kilopascals. These observations imply that local events were triggered by simple shear failure on normal faults.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉West, Michael -- Sanchez, John J -- McNutt, Stephen R -- New York, N.Y. -- Science. 2005 May 20;308(5725):1144-6.〈br /〉〈span class="detail_caption"〉Author address: 〈/span〉Alaska Volcano Observatory, Geophysical Institute, University of Alaska, Fairbanks, AK 99775, USA. west@gi.alaska.edu〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/15905395" target="_blank"〉PubMed〈/a〉
    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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  • 5
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    The projected timing of climate departure from recent variability (2013)
    Nature Publishing Group (NPG)
    Details
    Publication Date: 2013-10-11
    Description: Ecological and societal disruptions by modern climate change are critically determined by the time frame over which climates shift beyond historical analogues. Here we present a new index of the year when the projected mean climate of a given location moves to a state continuously outside the bounds of historical variability under alternative greenhouse gas emissions scenarios. Using 1860 to 2005 as the historical period, this index has a global mean of 2069 (+/-18 years s.d.) for near-surface air temperature under an emissions stabilization scenario and 2047 (+/-14 years s.d.) under a 'business-as-usual' scenario. Unprecedented climates will occur earliest in the tropics and among low-income countries, highlighting the vulnerability of global biodiversity and the limited governmental capacity to respond to the impacts of climate change. Our findings shed light on the urgency of mitigating greenhouse gas emissions if climates potentially harmful to biodiversity and society are to be prevented.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Mora, Camilo -- Frazier, Abby G -- Longman, Ryan J -- Dacks, Rachel S -- Walton, Maya M -- Tong, Eric J -- Sanchez, Joseph J -- Kaiser, Lauren R -- Stender, Yuko O -- Anderson, James M -- Ambrosino, Christine M -- Fernandez-Silva, Iria -- Giuseffi, Louise M -- Giambelluca, Thomas W -- England -- Nature. 2013 Oct 10;502(7470):183-7. doi: 10.1038/nature12540.〈br /〉〈span class="detail_caption"〉Author address: 〈/span〉Department of Geography, University of Hawai'i at Manoa, Honolulu, Hawai'i 96822, USA. cmora@hawaii.edu〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/24108050" target="_blank"〉PubMed〈/a〉
    Keywords: Animals ; Biodiversity ; *Computer Simulation ; *Global Warming ; Time
    Print ISSN: 0028-0836
    Electronic ISSN: 1476-4687
    Topics: Biology , Chemistry and Pharmacology , Medicine , Natural Sciences in General , Physics
    Published by Nature Publishing Group (NPG)
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  • 6
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    Mora et al. reply (2014)
    Nature Publishing Group (NPG)
    Details
    Publication Date: 2014-07-06
    Description: 〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Mora, Camilo -- Frazier, Abby G -- Longman, Ryan J -- Dacks, Rachel S -- Walton, Maya M -- Tong, Eric J -- Sanchez, Joseph J -- Kaiser, Lauren R -- Stender, Yuko O -- Anderson, James M -- Ambrosino, Christine M -- Fernandez-Silva, Iria -- Giuseffi, Louise M -- Giambelluca, Thomas W -- England -- Nature. 2014 Jul 3;511(7507):E5-6. doi: 10.1038/nature13524.〈br /〉〈span class="detail_caption"〉Author address: 〈/span〉Department of Geography, University of Hawai'i at Manoa, Honolulu, Hawaii 96822, USA. ; Department of Biology, University of Hawaii at Manoa, Honolulu, Hawaii 96822, USA. ; 1] Department of Biology, University of Hawaii at Manoa, Honolulu, Hawaii 96822, USA [2] Hawaii Institute of Marine Biology, University of Hawaii at Manoa, Kane'ohe, Hawaii 96744, USA. ; 1] Hawaii Institute of Marine Biology, University of Hawaii at Manoa, Kane'ohe, Hawaii 96744, USA [2] Department of Oceanography, University of Hawaii at Manoa, Honolulu, Hawaii 96822, USA. ; 1] Department of Geography, University of Hawai'i at Manoa, Honolulu, Hawaii 96822, USA [2] Hawaii Institute of Marine Biology, University of Hawaii at Manoa, Kane'ohe, Hawaii 96744, USA. ; 1] Hawaii Institute of Marine Biology, University of Hawaii at Manoa, Kane'ohe, Hawaii 96744, USA [2] Trans-disciplinary Organization for Subtropical Island Studies (TRO-SIS), University of the Ryukyus, Senbaru, Nishihara, Okinawa 903-0213, Japan.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/24990758" target="_blank"〉PubMed〈/a〉
    Keywords: Animals ; *Computer Simulation ; *Global Warming
    Print ISSN: 0028-0836
    Electronic ISSN: 1476-4687
    Topics: Biology , Chemistry and Pharmacology , Medicine , Natural Sciences in General , Physics
    Published by Nature Publishing Group (NPG)
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  • 7
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    DNA from pre-Clovis human coprolites in Oregon, North America (2008)
    American Association for the Advancement of Science (AAAS)
    Details
    Publication Date: 2008-04-05
    Description: The timing of the first human migration into the Americas and its relation to the appearance of the Clovis technological complex in North America at about 11,000 to 10,800 radiocarbon years before the present (14C years B.P.) remains contentious. We establish that humans were present at Paisley 5 Mile Point Caves, in south-central Oregon, by 12,300 14C years B.P., through the recovery of human mitochondrial DNA (mtDNA) from coprolites, directly dated by accelerator mass spectrometry. The mtDNA corresponds to Native American founding haplogroups A2 and B2. The dates of the coprolites are 〉1000 14C years earlier than currently accepted dates for the Clovis complex.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Gilbert, M Thomas P -- Jenkins, Dennis L -- Gotherstrom, Anders -- Naveran, Nuria -- Sanchez, Juan J -- Hofreiter, Michael -- Thomsen, Philip Francis -- Binladen, Jonas -- Higham, Thomas F G -- Yohe, Robert M 2nd -- Parr, Robert -- Cummings, Linda Scott -- Willerslev, Eske -- New York, N.Y. -- Science. 2008 May 9;320(5877):786-9. doi: 10.1126/science.1154116. Epub 2008 Apr 3.〈br /〉〈span class="detail_caption"〉Author address: 〈/span〉Centre for Ancient Genetics, University of Copenhagen, Universitetsparken 15, 2100 Copenhagen, Denmark.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/18388261" target="_blank"〉PubMed〈/a〉
    Keywords: Animals ; Base Sequence ; Canidae/genetics ; *DNA, Mitochondrial ; *Emigration and Immigration ; *Feces ; *Fossils ; Humans ; Molecular Sequence Data ; North America ; Oregon ; Polymerase Chain Reaction ; Polymorphism, Single Nucleotide ; Sciuridae/genetics ; Sigmodontinae/genetics ; Time
    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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  • 8
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    Transient self-bending of laser beams in photorefractive crystals with drift nonlinearity (1996)
    American Physical Society
    Details
    Publication Date: 1996-10-01
    Print ISSN: 1050-2947
    Electronic ISSN: 1094-1622
    Topics: Electrical Engineering, Measurement and Control Technology , Physics
    Published by American Physical Society
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  • 9
    Electronic Resource
    Electronic Resource
    Confirmation of the pyroelectric coefficient of strained InxGa1−xAs/GaAs quantum well structures grown on (111)B GaAs by differential photocurrent spectroscopy (2002)
    [S.l.] : American Institute of Physics (AIP)
    Journal of Applied Physics 91 (2002), S. 3002-3006 
    Details
    ISSN: 1089-7550
    Source: AIP Digital Archive
    Topics: Physics
    Notes: In this work we used the differential photocurrent technique to measure the strain-induced piezoelectric field in pseudomorphic InxGa1−xAs/GaAs heterostructures grown by molecular beam epitaxy on (111)B GaAs substrates. Single and multiple quantum well p–i–n diodes with two different In fractions in the well were analyzed in the temperature range of 25–300 K. Our results for a sample with a 17% In fraction confirm the previously reported value of the pyroelectric coefficient for a similar sample obtained by photoreflectance spectroscopy, hence, the equivalence of the differential photocurrent and photoreflectance techniques is also demonstrated. For a sample with 21% In, we report experimental determination of the temperature dependence of the piezoelectric constant and, therefore, of the strain-induced component of the pyroelectric coefficient. © 2002 American Institute of Physics.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1063/1.1445278
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  • 10
    Electronic Resource
    Electronic Resource
    Lactate dehydrogenases in cyanobacteria (1975)
    Springer
    Archives of microbiology 104 (1975), S. 57-65 
    Details
    ISSN: 1432-072X
    Keywords: Cyanobacteria ; Lactate Dehydrogenases ; Lactate Metabolism ; Synechococcus ; Aphanocapsa
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology
    Notes: Abstract NAD-linked lactate dehydrogenases specific for the d- and l-lactate have been demonstrated in a number of strains of unicellular cyanobacteria. The d-lactate dehydrogenase of one strain (Synechococcus 6716) was partially purified and its properties were studied. The enzyme has a molecular weight of ca. 115000–120000, is highly specific, autooxidizable, and susceptible to inhibition by iodoacetamide, oxamate and ATP. The possible physiological functions of the enzyme in the metabolism of the organism were investigated. d-lactate carbon was incorporated in cell material during photosynthetic growth with CO2, but lactate was not used as sole source of carbon for photosynthetic or chemosynthetic development. d-lactate and pyruvate were oxidized aerobically in the dark by resting cell suspensions with the assimilation mainly of the the C3 and C3 carbon atoms. In the oxidation of lactate, acetate was excreted into the medium. No fermentation of glucose was found, but a small amount of d-lactate was detected as a product of endogenous dark metabolism of the cell. All enzymes required for the production of lactate from glucose and from glycogen were found in exponentially growing cells, but the activity of some key enzymes was low or undetectable in old cultures.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00447300
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