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  • 1
    Publication Date: 2014-08-21
    Description: Modern strains of Mycobacterium tuberculosis from the Americas are closely related to those from Europe, supporting the assumption that human tuberculosis was introduced post-contact. This notion, however, is incompatible with archaeological evidence of pre-contact tuberculosis in the New World. Comparative genomics of modern isolates suggests that M. tuberculosis attained its worldwide distribution following human dispersals out of Africa during the Pleistocene epoch, although this has yet to be confirmed with ancient calibration points. Here we present three 1,000-year-old mycobacterial genomes from Peruvian human skeletons, revealing that a member of the M. tuberculosis complex caused human disease before contact. The ancient strains are distinct from known human-adapted forms and are most closely related to those adapted to seals and sea lions. Two independent dating approaches suggest a most recent common ancestor for the M. tuberculosis complex less than 6,000 years ago, which supports a Holocene dispersal of the disease. Our results implicate sea mammals as having played a role in transmitting the disease to humans across the ocean.〈br /〉〈br /〉〈a href="https://www.ncbi.nlm.nih.gov/pmc/articles/PMC4550673/" target="_blank"〉〈img src="https://static.pubmed.gov/portal/portal3rc.fcgi/4089621/img/3977009" border="0"〉〈/a〉   〈a href="https://www.ncbi.nlm.nih.gov/pmc/articles/PMC4550673/" target="_blank"〉This paper as free author manuscript - peer-reviewed and accepted for publication〈/a〉〈br /〉〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Bos, Kirsten I -- Harkins, Kelly M -- Herbig, Alexander -- Coscolla, Mireia -- Weber, Nico -- Comas, Inaki -- Forrest, Stephen A -- Bryant, Josephine M -- Harris, Simon R -- Schuenemann, Verena J -- Campbell, Tessa J -- Majander, Kerttu -- Wilbur, Alicia K -- Guichon, Ricardo A -- Wolfe Steadman, Dawnie L -- Cook, Della Collins -- Niemann, Stefan -- Behr, Marcel A -- Zumarraga, Martin -- Bastida, Ricardo -- Huson, Daniel -- Nieselt, Kay -- Young, Douglas -- Parkhill, Julian -- Buikstra, Jane E -- Gagneux, Sebastien -- Stone, Anne C -- Krause, Johannes -- 098051/Wellcome Trust/United Kingdom -- AI090928/AI/NIAID NIH HHS/ -- MC_U117581288/Medical Research Council/United Kingdom -- R01 AI090928/AI/NIAID NIH HHS/ -- Medical Research Council/United Kingdom -- England -- Nature. 2014 Oct 23;514(7523):494-7. doi: 10.1038/nature13591. Epub 2014 Aug 20.〈br /〉〈span class="detail_caption"〉Author address: 〈/span〉1] Department of Archaeological Sciences, University of Tubingen, Ruemelinstrasse 23, 72070 Tubingen, Germany [2]. ; 1] School of Human Evolution and Social Change, Arizona State University, PO Box 872402, Tempe, Arizona 85287-2402, USA [2]. ; 1] Department of Archaeological Sciences, University of Tubingen, Ruemelinstrasse 23, 72070 Tubingen, Germany [2] Center for Bioinformatics, University of Tubingen, Sand 14, 72076 Tubingen, Germany [3]. ; 1] Department of Medical Parasitology and Infection Biology, Swiss Tropical and Public Health Institute, Socinstrasse 57, 4002 Basel, Switzerland [2] University of Basel, Petersplatz 1, CH-4003 Basel, Switzerland [3]. ; Center for Bioinformatics, University of Tubingen, Sand 14, 72076 Tubingen, Germany. ; 1] Genomics and Health Unit, FISABIO-Public Health, Avenida Cataluna 21, 46020 Valencia, Spain [2] CIBER (Centros de Investigacion Biomedica en Red) in Epidemiology and Public Health, Instituto de Salud Carlos III, C/ Monforte de Lemos 3-5, Pabellon 11, Planta 0, 28029 Madrid, Spain. ; Department of Archaeological Sciences, University of Tubingen, Ruemelinstrasse 23, 72070 Tubingen, Germany. ; Pathogen Genomics, The Wellcome Trust Sanger Institute, Wellcome Trust Genome Campus, Hinxton, Cambridge CB10 1SA, UK. ; Department of Archaeology, University of Cape Town, Private Bag X1, Rondebosch, 7701, South Africa. ; School of Human Evolution and Social Change, Arizona State University, PO Box 872402, Tempe, Arizona 85287-2402, USA. ; CONICET, Laboratorio de Ecologia Evolutiva Humana (FACSO, UNCPBA), Departamento de Biologia (FCEyN, UNMDP), Calle 508 No. 881 (7631), Quequen, Argentina. ; Department of Anthropology, University of Tennessee, 250 South Stadium Hall, Knoxville, Tennessee 37996, USA. ; Department of Anthropology, Indiana University, 701 East Kirkwood Avenue, Bloomington, Indiana 47405-7100, USA. ; 1] Molecular Mycobacteriology, Forschungszentrum Borstel, Parkallee 1, 23845 Borstel, Germany [2] German Center for Infection Research, Forschungszentrum Borstel, Parkallee 1, 23845 Borstel, Germany. ; McGill International TB Centre, McGill University, 1650 Cedar Avenue, Montreal H3G 1A4, Canada. ; Biotechnology Institute, CICVyA-INTA Castelar, Dr. Nicolas Repetto y De Los Reseros S/N, (B1686IGC) Hurlingham, Buenos Aires, Argentina. ; Instituto de Investigaciones Marinas y Costeras (CONICET-UNMdP), Facultad de Ciencias Exactas y Naturales, Universidad Nacional de Mar del Plata, San Luis 1722, Mar del Plata 7600, Argentina. ; 1] Department of Medicine, Imperial College, London W2 1PG, UK [2] Division of Mycobacterial Research, MRC National Institute for Medical Research, Mill Hill, London NW7 1AA, UK. ; 1] Department of Medical Parasitology and Infection Biology, Swiss Tropical and Public Health Institute, Socinstrasse 57, 4002 Basel, Switzerland [2] University of Basel, Petersplatz 1, CH-4003 Basel, Switzerland. ; 1] Department of Archaeological Sciences, University of Tubingen, Ruemelinstrasse 23, 72070 Tubingen, Germany [2] Senckenberg Centre for Human Evolution and Palaeoenvironment, University of Tubingen, Tubingen 72070, Germany [3] Max Planck Institute for Science and History, Khalaische Strasse 10, 07745 Jena, Germany.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/25141181" target="_blank"〉PubMed〈/a〉
    Keywords: Animals ; Bone and Bones/microbiology ; Europe/ethnology ; Genome, Bacterial/*genetics ; Genomics ; History, Ancient ; Human Migration/history ; Humans ; Mycobacterium tuberculosis/*genetics ; Peru ; Phylogeny ; Pinnipedia/*microbiology ; Tuberculosis/*history/*microbiology/transmission ; Zoonoses/*history/*microbiology/transmission
    Print ISSN: 0028-0836
    Electronic ISSN: 1476-4687
    Topics: Biology , Chemistry and Pharmacology , Medicine , Natural Sciences in General , Physics
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  • 2
    Publication Date: 2015-03-15
    Description: 〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Naeem, S -- Ingram, J C -- Varga, A -- Agardy, T -- Barten, P -- Bennett, G -- Bloomgarden, E -- Bremer, L L -- Burkill, P -- Cattau, M -- Ching, C -- Colby, M -- Cook, D C -- Costanza, R -- DeClerck, F -- Freund, C -- Gartner, T -- Goldman-Benner, R -- Gunderson, J -- Jarrett, D -- Kinzig, A P -- Kiss, A -- Koontz, A -- Kumar, P -- Lasky, J R -- Masozera, M -- Meyers, D -- Milano, F -- Naughton-Treves, L -- Nichols, E -- Olander, L -- Olmsted, P -- Perge, E -- Perrings, C -- Polasky, S -- Potent, J -- Prager, C -- Quetier, F -- Redford, K -- Saterson, K -- Thoumi, G -- Vargas, M T -- Vickerman, S -- Weisser, W -- Wilkie, D -- Wunder, S -- New York, N.Y. -- Science. 2015 Mar 13;347(6227):1206-7. doi: 10.1126/science.aaa1403. Epub 2015 Mar 12.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/25766222" target="_blank"〉PubMed〈/a〉
    Keywords: *Conservation of Natural Resources/economics ; *Ecosystem ; *Environment ; Guidelines as Topic ; Policy
    Print ISSN: 0036-8075
    Electronic ISSN: 1095-9203
    Topics: Biology , Chemistry and Pharmacology , Computer Science , Medicine , Natural Sciences in General , Physics
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  • 3
    Electronic Resource
    Electronic Resource
    [S.l.] : American Institute of Physics (AIP)
    Journal of Applied Physics 69 (1991), S. 5352-5354 
    ISSN: 1089-7550
    Source: AIP Digital Archive
    Topics: Physics
    Notes: The Mössbauer effect has been used to study the microscopic magnetic properties of the cubic microwave ferrite (Zn0.41Ni0.59)Fe2O4 at 300 K. The magnetically split spectrum is broad and unresolved due to the overlap of the hyperfine magnetic fields at the tetrahedral and octahedral sites. This is caused by a distribution of magnetic fields at each site. The distribution is especially large and asymmetric at the octahedral site and is due to the fact that the iron atoms at this site are influenced by the presence of both iron and zinc at the tetrahedral site. The octahedral site is more sensitive to changes in the number of zinc neighbors than is the tetrahedral site. Assuming a random distribution of the zinc at the tetrahedral site, and knowing the fraction of zinc in the ferrite, the binomial distribution has been used to calculate the expected magnetic-field distribution at the octahedral site as a function of the number of zinc neighbors. These figures have been compared with the magnetic-field distribution profile determined from the fit to the Mössbauer spectrum. Sufficiently good agreement has been found to allow us to isolate the magnetic-field contribution due to most of the different numbers, between zero and six, of neighboring zinc atoms.
    Type of Medium: Electronic Resource
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  • 4
    Electronic Resource
    Electronic Resource
    [S.l.] : American Institute of Physics (AIP)
    Journal of Applied Physics 69 (1991), S. 5355-5357 
    ISSN: 1089-7550
    Source: AIP Digital Archive
    Topics: Physics
    Notes: The magnetic and crystalline properties of a plasma-sprayed coating of the microwave absorbing zinc-nickel ferrite, (Zn0.41Ni0.59 )Fe2O4 have been studied at 300 K using the Mössbauer effect and x-ray diffraction (XRD). Both techniques indicate that the plasma-sprayed material separated into two phases. The first is a nickel-rich phase with magnetic fields of 47.5 and 44.5 T at the tetrahedral and octahedral sites, respectively. The second is a zinc-rich phase, zinc meta-ferrite, having a small magnetic field of 4.2 T. The quadrupole splitting of this second phase is ΔE=0.34 mm s−1, which is the same as in pure nonmagnetic zinc ferrite. XRD analysis shows that the zinc-rich phase remains cubic with a0= 8.389 A(ring) and the zinc meta-ferrite phase is tetragonal with the same lattice parameters as the cubic phase except for one elongated axis given by c0 =8.488 A(ring). This is much larger than the spacing for any of the series of zinc-nickel ferrites. The isomer shift of the zinc meta-ferrite is 0.710 mm s−1, which indicates that a large fraction of Fe3+ was reduced during the spraying process. Annealing the sprayed coating at temperatures less than 400 °C converted the zinc meta-ferrite into a magnetic phase that now exhibits magnetic fields close to those in the nickel-rich phase. However, the large isomer shift remains, indicating that the ferrous iron is still present. XRD shows that the phase is now cubic. Annealing up to 650 °C gradually oxidized all of the Fe2+ in the material and restored the magnetic and crystalline properties of the plasma-sprayed coating to very close to those of the unsprayed ferrite.
    Type of Medium: Electronic Resource
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  • 5
    Electronic Resource
    Electronic Resource
    [S.l.] : American Institute of Physics (AIP)
    Journal of Applied Physics 85 (1999), S. 329-332 
    ISSN: 1089-7550
    Source: AIP Digital Archive
    Topics: Physics
    Notes: The relative recoilless fraction (F-value) of each of six iron oxides, defined as the ratio of the recoil-free fractions of two different materials, was experimentally determined relative to hematite at 300 K and 77 K by Mössbauer spectroscopy. Using the relative recoil-free fractions compared to that of hematite, the relative recoilless fractions between all pairs of the seven iron oxides were determined. The F-values can allow conversion of Mössbauer subspectral areas to the relative atomic, molecular, or weight fractions of each iron oxide present in a mixed oxide phase sample. © 1999 American Institute of Physics.
    Type of Medium: Electronic Resource
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  • 6
    Electronic Resource
    Electronic Resource
    Palo Alto, Calif. : Annual Reviews
    Annual Review of Anthropology 9 (1980), S. 433-470 
    ISSN: 0084-6570
    Source: Annual Reviews Electronic Back Volume Collection 1932-2001ff
    Topics: Ethnic Sciences , Biology
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  • 7
    Electronic Resource
    Electronic Resource
    Springer
    Hyperfine interactions 29 (1986), S. 1463-1466 
    ISSN: 1572-9540
    Source: Springer Online Journal Archives 1860-2000
    Topics: Physics
    Notes: Abstract A gas flow proportional counter has been constructed for operation between 100K and 400K without the need for an evacuated cryostat. The detector is temperature controlled and may be used for detecting conversion electrons or X-rays. Six different gases, pure He, He/1%CH4, He/5%CH4, He/10%CH4, He/5%Co, and Ar/5%CH4 have been investigated in order to obtain maximum efficiency and reliability of operation. At room temperature and above, all gases are suitable. At low temperatures, He/5%Co is the most suitable for electron detection, For X-ray detection, Ar/5%CH4 is suitable over the entire temperature range.
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  • 8
    Electronic Resource
    Electronic Resource
    Springer
    Hyperfine interactions 92 (1994), S. 959-964 
    ISSN: 1572-9540
    Source: Springer Online Journal Archives 1860-2000
    Topics: Physics
    Notes: Abstract A study has been made of highly nitrogenated pure iron and iron-aluminum alloy powder containing 2 wt.% Al (Fe-2Al) using Mössbauer spectroscopy and X-ray diffraction. The samples were prepared by high-temperature, high-pressure diffusion of nitrogen. They were prepared in a hot-isostatic-pressure (HIP) furnace at 1000 °C at nitrogen pressures up to 200 MPa. The alloy powders contained up to 8 at.% nitrogen as determined by vacuum fusion analysis. XRD analysis indicates that for the pure iron powders, the lattice spacing remained independent of nitrogen concentration, but that for the Fe-2Al powders, it decreased with increasing nitrogen concentration. Mössbauer analysis showed that for the pure iron powders, most of the nitrogen was associated with the formation of the iron nitride Fe4N. For the alloy powders containing less than 5 at.% nitrogen, all of the nitrogen was contained interstitially. The presence of nitrogen completely eliminated the conduction-electron spin-density oscillations observed in many ferromagnetic alloys.
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  • 9
    Electronic Resource
    Electronic Resource
    Springer
    Hyperfine interactions 41 (1988), S. 625-628 
    ISSN: 1572-9540
    Source: Springer Online Journal Archives 1860-2000
    Topics: Physics
    Notes: Abstract A CEMS and XMS study of carbon steel has shown that the microstructure of the bulk material as well as the surface depends on the temperature at which the steel was tempered. Ion milling of the surface results in no change to the surface microstructure which corresponds closely to the bulk properties. However, after polishing the surface with 3μm diamond, the surface composition is changed to a large extent. Polishing decreases the amount of retained austenite and also the fraction of interstitial carbon within the austenite on the surface of the non-tempered steel. A related increase in the amount of surface martensite is observed. The effects of polishing extends to depths of over 1000 Å. Both X- and θ-carbides are present in each of the tempered steels and only the amount of θ-carbide is seen to increase as the samples are tempered to decrease hardness. Tempering to higher temperatures decreases the martensite content and a corresponding increase is seen in the θ-carbide only. Polishing also removes a large feaction of the carbide from the surface and this may account for the anomalously high wear resistance previously determined for the steel.
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  • 10
    Electronic Resource
    Electronic Resource
    Springer
    Hyperfine interactions 41 (1988), S. 701-704 
    ISSN: 1572-9540
    Source: Springer Online Journal Archives 1860-2000
    Topics: Physics
    Notes: Abstract A CEMS and XMS study of the surface oxidation of weathering steel, ASTM A242 Type 1, has shown that after exposure times of 5 1/2 years in a marine or industrial environment, the steel has not yet reached a stage at which the surface is fully protecting the substrate from further corrosion. The formation of α-FeOOH, an intermediate stage of protection, occurs mainly in the form of small particles, the properties of which exhibit an appreciable amount of superparamagnetic relaxation. For the steel exposed to a more moist marine environment, α-FeOOH exists only in the form of small particles. However for the steel exposed to a much dryer and corrosive industrial environment, more α-FeOOH is present. The formation of bulk α-FeOOH is more complete. The temperature dependence of the superparamagnetic hyperfine field and also the field distributions indicate that, in a marine environment, the clusters of α-FeOOH are both smaller in size and have a larger distribution of particle size. The XMS results indicate that α-FeOOH is present below a layer of γ-FeOOH and ferrihydrite which are generally accepted to constitute the early oxidation phases observed on steels.
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