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
    Filamentous bacteria transport electrons over centimetre distances (2012)
    Nature Publishing Group (NPG)
    Details
    Publication Date: 2012-10-30
    Description: Oxygen consumption in marine sediments is often coupled to the oxidation of sulphide generated by degradation of organic matter in deeper, oxygen-free layers. Geochemical observations have shown that this coupling can be mediated by electric currents carried by unidentified electron transporters across centimetre-wide zones. Here we present evidence that the native conductors are long, filamentous bacteria. They abounded in sediment zones with electric currents and along their length they contained strings with distinct properties in accordance with a function as electron transporters. Living, electrical cables add a new dimension to the understanding of interactions in nature and may find use in technology development.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Pfeffer, Christian -- Larsen, Steffen -- Song, Jie -- Dong, Mingdong -- Besenbacher, Flemming -- Meyer, Rikke Louise -- Kjeldsen, Kasper Urup -- Schreiber, Lars -- Gorby, Yuri A -- El-Naggar, Mohamed Y -- Leung, Kar Man -- Schramm, Andreas -- Risgaard-Petersen, Nils -- Nielsen, Lars Peter -- England -- Nature. 2012 Nov 8;491(7423):218-21. doi: 10.1038/nature11586. Epub 2012 Oct 24.〈br /〉〈span class="detail_caption"〉Author address: 〈/span〉Center for Geomicrobiology, Department of Bioscience, Aarhus University, 8000 Aarhus C, Denmark.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/23103872" target="_blank"〉PubMed〈/a〉
    Keywords: Aquatic Organisms/cytology/metabolism/ultrastructure ; Deltaproteobacteria/cytology/*metabolism/ultrastructure ; Denmark ; *Electric Conductivity ; Electron Transport ; Geologic Sediments/microbiology ; Glass ; Microspheres ; Molecular Sequence Data ; Molecular Typing ; Oceans and Seas ; Oxygen/metabolism ; Porosity ; RNA, Ribosomal, 16S/analysis/genetics ; Sulfides/metabolism
    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)
    Location Call Number Expected Availability
    BibTip Others were also interested in ...
    PAPER CURRENT
  • 2
    facet.materialart.
    Unknown
    Retinotectal projection in goldfish to an inappropriate region with a reversal in polarity (1979)
    American Association for the Advancement of Science (AAAS)
    Details
    Publication Date: 1979-08-24
    Description: An abnormal, ipsilateral projection was formed by deflecting optic fibers that normally innervate the posterior part of one tectum into the anterior end of the opposite tectum. When anterior recipient tectum was simultaneously denervate, the deflected fibers formed a retinotopic map in this region that was reversed with respect to the anterior-posterior tectal axis.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Meyer, R L -- New York, N.Y. -- Science. 1979 Aug 24;205(4408):819-20.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/462191" target="_blank"〉PubMed〈/a〉
    Keywords: Animals ; Goldfish ; Optic Nerve/*physiology ; Retina/*innervation ; Superior Colliculi/*physiology ; Visual Pathways/*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
  • 3
    facet.materialart.
    Unknown
    Eye dominance columns from an isogenic double-nasal frog eye (1983)
    American Association for the Advancement of Science (AAAS)
    Details
    Publication Date: 1983-07-15
    Description: Removing the posterior (temporal) two-thirds of the Xenopus eye bud produces a remaining fragment, which becomes round and grows to a normal adult size eye. Electrophysiological and anatomical analyses showed that each of the two halves of this eye projected across the entire optic tectum in mirror image (double-nasal) fashion, and that fibers from each half-eye sorted out to form eye dominance stripes on the tectum. That both halves of the mirror-symmetric map were derived from only one animal, and from only one side of the head, rules out global markers such as right versus left and histocompatibility differences as causing the formation of these stripes.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Ide, C F -- Fraser, S E -- Meyer, R L -- NS16319/NS/NINDS NIH HHS/ -- New York, N.Y. -- Science. 1983 Jul 15;221(4607):293-5.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/6857287" target="_blank"〉PubMed〈/a〉
    Keywords: Animals ; Electrophysiology ; Eye/*innervation ; Optic Nerve/physiology ; Retina/physiology ; Superior Colliculi/physiology ; Vision, Ocular/*physiology ; Xenopus
    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
  • 4
    facet.materialart.
    Unknown
    Tetrodotoxin blocks the formation of ocular dominance columns in goldfish (1982)
    American Association for the Advancement of Science (AAAS)
    Details
    Publication Date: 1982-11-05
    Description: Optic fibers from both eyes were made to regenerate simultaneously into one tectum in goldfish. Autoradiography at various times later revealed that regenerating left and right fibers overlapped extensively for up to 4 weeks and subsequently segregated into eye dominance columns by 8 weeks. Continuous tetrodotoxin treatment of both eyes prevented the formation of columns for up to 13 weeks and was equally effective if begun at 6 weeks. When tetrodotoxin treatment was stopped after 11 weeks, columns subsequently formed in the next 3 weeks. Blockade of only one eye did prevent column formation at 8 weeks.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Meyer, R L -- NS15381/NS/NINDS NIH HHS/ -- New York, N.Y. -- Science. 1982 Nov 5;218(4572):589-91.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/7123262" target="_blank"〉PubMed〈/a〉
    Keywords: Animals ; Functional Laterality ; Goldfish ; Nerve Regeneration/drug effects ; Neuronal Plasticity/*drug effects ; Tetrodotoxin/*pharmacology ; Visual Pathways/drug effects/*growth & development
    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
  • 5
    Electronic Resource
    Electronic Resource
    Temperature dependence of synchrotron radiation loss in inhomogeneous tokamak plasmas (1992)
    New York, NY : American Institute of Physics (AIP)
    Physics of Fluids 4 (1992), S. 4051-4056 
    Details
    ISSN: 1089-7666
    Source: AIP Digital Archive
    Topics: Physics
    Notes: Synchrotron radiation in a tokamak with inhomogeneous plasma parameters is investigated to determine the role of the temperature profile on the global loss. Using reactor relevant parameters, it is shown that synchrotron radiation is profile dependent, namely, at constant thermal energy, the emitted radiation increases with the peak temperature. An approximated analytical formula for the global loss is found.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1063/1.860311
    Location Call Number Expected Availability
    BibTip Others were also interested in ...
    Paper (German National Licenses)
    Fulltext
  • 6
    Electronic Resource
    Electronic Resource
    Structure of electron-cyclotron ordinary mode damping (1989)
    New York, NY : American Institute of Physics (AIP)
    Physics of Fluids 1 (1989), S. 1937-1939 
    Details
    ISSN: 1089-7666
    Source: AIP Digital Archive
    Topics: Physics
    Notes: The ordinary mode damping near the electron-cyclotron frequency is investigated using the relativistic dispersion relation. It is shown that the Doppler splitting of the absorption spectrum claimed by Arunasalam et al. [Phys. Rev. A 36, 3909 (1987); 37, 2063 (1988)] is an erroneous result obtained from an oversimplified dispersion relation and assuming an infinite speed of light in the resonance condition.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1063/1.859113
    Location Call Number Expected Availability
    BibTip Others were also interested in ...
    Paper (German National Licenses)
    Fulltext
  • 7
    Electronic Resource
    Electronic Resource
    Measurement of current drive profile using electron cyclotron wave attenuation near the O-mode cutoff (1992)
    New York, NY : American Institute of Physics (AIP)
    Physics of Fluids 4 (1992), S. 145-151 
    Details
    ISSN: 1089-7666
    Source: AIP Digital Archive
    Topics: Physics
    Notes: A method for determining the radial profile of the lower-hybrid current drive in tokamaks using electron cyclotron attenuation of the O mode for frequencies ω near the cutoff frequency is discussed. The basic idea is that, for a given wave frequency, the cutoff plays the role of a spatial filter selecting a variable portion of the noninductive current. It is shown that the incremental attenuation resulting from a small increase of ω displays specific features related to the current density near the cutoff point. Using the relation between the wave damping and the current density, it is possible to determine the radial profile of the current drive from the wave attenuation measurements. A numerical application is also presented for plasma parameters in the reactor regime.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1063/1.860453
    Location Call Number Expected Availability
    BibTip Others were also interested in ...
    Paper (German National Licenses)
    Fulltext
  • 8
    Electronic Resource
    Electronic Resource
    Measurement of lower-hybrid-driven current profile by Abel inversion of electron-cyclotron wave transmission spectra (1991)
    New York, NY : American Institute of Physics (AIP)
    Physics of Fluids 3 (1991), S. 2719-2722 
    Details
    ISSN: 1089-7666
    Source: AIP Digital Archive
    Topics: Physics
    Notes: A method for measuring the radial profile of the lower-hybrid-driven current in a low-density tokamak plasma using electron-cyclotron wave attenuation is discussed. This diagnostic scheme is reminiscent of the transmission interferometry approach, commonly used in tokamaks to measure the plasma density, but now the wave amplitude instead of the phase is measured. Wave attenuation of the ordinary mode at ωp (very-much-less-than) ω 〈 ωc along vertical chords is measured; at these frequencies, the waves are absorbed by the superthermal tail sustained by lower-hybrid waves and the local wave absorption coefficient is proportional to the noninductive current density. The radial profile of this current is obtained from Abel inversion. An application to the Tore Supra tokamak is presented.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1063/1.860002
    Location Call Number Expected Availability
    BibTip Others were also interested in ...
    Paper (German National Licenses)
    Fulltext
  • 9
    Electronic Resource
    Electronic Resource
    Power dependence of electron cyclotron wave damping in tokamak plasmas (1987)
    [S.l.] : American Institute of Physics (AIP)
    Physics of Fluids 30 (1987), S. 438-441 
    Details
    ISSN: 1089-7666
    Source: AIP Digital Archive
    Topics: Physics
    Notes: The power dependence of the wave damping in a tokamak plasma for arbitrary direction of propagation, mode of polarization, and wave frequency is investigated. Using a 2-D Fokker–Planck code, it is shown that the wave damping increases or decreases with the rf power depending on the velocity range of the absorbing electrons.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1063/1.866394
    Location Call Number Expected Availability
    BibTip Others were also interested in ...
    Paper (German National Licenses)
    Fulltext
  • 10
    Electronic Resource
    Electronic Resource
    Electron-cyclotron heating in the presence of a dc electric field in tokamak plasmas (1985)
    [S.l.] : American Institute of Physics (AIP)
    Physics of Fluids 28 (1985), S. 127-132 
    Details
    ISSN: 1089-7666
    Source: AIP Digital Archive
    Topics: Physics
    Notes: The combined effects of the dc electric field and electron-cyclotron wave absorption in tokamak plasmas are investigated. The case of the ordinary mode for nearly normal propagation from the low magnetic field side is studied by a two-dimensional Fokker–Planck code. It is found that the small fraction of the wave energy that goes into the superthermal electrons enhances the effect of the continuous pushing of the tokamak electric field.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1063/1.865192
    Location Call Number Expected Availability
    BibTip Others were also interested in ...
    Paper (German National Licenses)
    Fulltext
Close ⊗
This website uses cookies and the analysis tool Matomo. More information can be found here...