ALBERT

All Library Books, journals and Electronic Records Telegrafenberg

X
feed icon rss

Your email was sent successfully. Check your inbox.

An error occurred while sending the email. Please try again.

Proceed reservation?

Export
  • 1
    facet.materialart.
    Unknown
    The effective fine-structure constant of freestanding graphene measured in graphite (2010)
    American Association for the Advancement of Science (AAAS)
    Details
    Publication Date: 2010-11-06
    Description: Electrons in graphene behave like Dirac fermions, permitting phenomena from high-energy physics to be studied in a solid-state setting. A key question is whether or not these fermions are critically influenced by Coulomb correlations. We performed inelastic x-ray scattering experiments on crystals of graphite and applied reconstruction algorithms to image the dynamical screening of charge in a freestanding graphene sheet. We found that the polarizability of the Dirac fermions is amplified by excitonic effects, improving screening of interactions between quasiparticles. The strength of interactions is characterized by a scale-dependent, effective fine-structure constant, alpha(g)* (k,omega), the value of which approaches 0.14 +/- 0.092 ~ 1/7 at low energy and large distances. This value is substantially smaller than the nominal alpha(g) = 2.2, suggesting that, on the whole, graphene is more weakly interacting than previously believed.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Reed, James P -- Uchoa, Bruno -- Joe, Young Il -- Gan, Yu -- Casa, Diego -- Fradkin, Eduardo -- Abbamonte, Peter -- New York, N.Y. -- Science. 2010 Nov 5;330(6005):805-8. doi: 10.1126/science.1190920.〈br /〉〈span class="detail_caption"〉Author address: 〈/span〉Department of Physics and Frederick Seitz Materials Research Laboratory, University of Illinois, Urbana, IL 61801, USA.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/21051634" 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)
    Location Call Number Expected Availability
    BibTip Others were also interested in ...
    PAPER CURRENT
  • 2
    facet.materialart.
    Unknown
    Island biogeography reveals the deep history of SIV (2010)
    American Association for the Advancement of Science (AAAS)
    Details
    Publication Date: 2010-09-18
    Description: Simian immunodeficiency virus (SIV) lineages have been identified that are endemic to Bioko Island. The time the island formed offers a geological time scale calibration point for dating the most recent common ancestor of SIV. The Bioko viruses cover the whole range of SIV genetic diversity, and each Bioko SIV clade is most closely related to viruses circulating in hosts of the same genus on the African mainland rather than to SIVs of other Bioko species. Our phylogeographic approach establishes that SIV is ancient and at least 32,000 years old. Our conservative calibration point and analyses of gene sequence saturation and dating bias suggest it may be much older.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Worobey, Michael -- Telfer, Paul -- Souquiere, Sandrine -- Hunter, Meredith -- Coleman, Clint A -- Metzger, Michael J -- Reed, Patricia -- Makuwa, Maria -- Hearn, Gail -- Honarvar, Shaya -- Roques, Pierre -- Apetrei, Cristian -- Kazanji, Mirdad -- Marx, Preston A -- 1R01AI27698/AI/NIAID NIH HHS/ -- 1R01AI44596/AI/NIAID NIH HHS/ -- New York, N.Y. -- Science. 2010 Sep 17;329(5998):1487. doi: 10.1126/science.1193550.〈br /〉〈span class="detail_caption"〉Author address: 〈/span〉University of Arizona, Tucson, AZ 85721, USA.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/20847261" target="_blank"〉PubMed〈/a〉
    Keywords: Animals ; Cercopithecidae/*virology ; Cercopithecus/virology ; Colobus/virology ; Equatorial Guinea ; Evolution, Molecular ; Genes, pol ; Genetic Variation ; Geography ; Mandrillus/virology ; Molecular Sequence Data ; Phylogeny ; Simian Acquired Immunodeficiency Syndrome/*virology ; Simian Immunodeficiency Virus/*classification/*genetics/isolation & purification ; 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)
    Location Call Number Expected Availability
    BibTip Others were also interested in ...
    PAPER CURRENT
  • 3
    facet.materialart.
    Unknown
    Adherence of group A streptococci to pharyngeal cells: a role in the pathogenesis of rheumatic fever (1978)
    American Association for the Advancement of Science (AAAS)
    Details
    Publication Date: 1978-08-04
    Description: We used an assay in vitro to investigate the possible role of streptococcal adherence to human pharyngeal cells in the pathogenesis of acute rheumatic fever. There was no difference in adherence of rheumatic fever-associated and non-associated strains of group A streptococci to pooled pharyngeal cells of normal people. Likewise, streptococci not associated with rheumatic fever adhered equally well to cells taken from normal people and from patients with rheumatic heart disease. However, the pharyngeal cells of all nine rheumatic heart disease patients tested had increased avidity for adherence for a rheumatic fever-associated strain of streptococcus compared to the pharyngeal cells obtained from age- and sex-matched controls. Increased streptococcal adherence to pharyngeal cells of rheumatic fever-prone patients may play a role in the pathogenesis of rheumatic fever.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Selinger, D S -- Julie, N -- Reed, W P -- Williams, R C Jr -- New York, N.Y. -- Science. 1978 Aug 4;201(4354):455-7.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/351810" target="_blank"〉PubMed〈/a〉
    Keywords: Adult ; Female ; Humans ; Male ; Middle Aged ; Pharyngeal Diseases/complications/microbiology ; Pharynx/*microbiology ; Rheumatic Fever/*etiology/microbiology ; Streptococcus pyogenes/*physiology
    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)
    Location Call Number Expected Availability
    BibTip Others were also interested in ...
    PAPER CURRENT
Close ⊗
This website uses cookies and the analysis tool Matomo. More information can be found here...