Library

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
Filter
  • 1995-1999  (4)
  • 1980-1984
  • 1999  (4)
Source
Material
Years
  • 1995-1999  (4)
  • 1980-1984
Year
Keywords
  • 1
    Electronic Resource
    Electronic Resource
    Ion channeling study of the lattice disorder in neutron irradiated GaP (1999)
    [S.l.] : American Institute of Physics (AIP)
    Journal of Applied Physics 86 (1999), S. 2352-2354 
    Details
    ISSN: 1089-7550
    Source: AIP Digital Archive
    Topics: Physics
    Notes: The lattice disorder in GaP produced by fast neutrons with a fluence of 2.1×1018 cm−2 has been investigated with 1.5 MeV 4He+ channeling. The slight increase in the 〈111〉 aligned yield for irradiated crystals indicates that each primary knock-on (PKO) produces approximately 7×102 displaced atoms. Channeling studies also show a spread distribution of randomly located defects imbedded in the lattice structure. On the other hand, P antisite (PGa) defects produced by neutron irradiation are ∼2 per PKO. Irradiated samples also show a volume expansion of 0.13%. It is suggested that the lattice expansion mainly induced by vacancy–interstitial clusters arises from the displacement atoms rather than PGa defects. © 1999 American Institute of Physics.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1063/1.371054
    Library Location Call Number Volume/Issue/Year Availability
    BibTip Others were also interested in ...
    Paper (German National Licenses)
    Fulltext
  • 2
    Electronic Resource
    Electronic Resource
    Relation between the substitutional fraction and electrical activation of carbon in heavily C-ion implanted GaAs (1999)
    [S.l.] : American Institute of Physics (AIP)
    Journal of Applied Physics 85 (1999), S. 6926-6928 
    Details
    ISSN: 1089-7550
    Source: AIP Digital Archive
    Topics: Physics
    Notes: Nuclear reaction analysis (NRA), using the 12C(d,p)13C reaction, in conjunction with Rutherford backscattering spectrometry (RBS) in the channeling geometry was used to evaluate the substitutional fraction of C in (100)-oriented semi-insulating GaAs implanted with 12C ions to a dose of 5×1016 cm−2. The substitutional fraction of the implanted 12C evaluated by NRA was 19% in the samples annealed at 600 °C, whereas the electrical activation rate of the same sample was 2.1%, as measured by the van der Pauw method. It is suggested that a possible origin of this discrepancy is the compensating centers such as As vacancy (VAs) and/or VAs-CAs complex introduced in the annealing processes. This was supported by both the surface precipitation of As observed by Raman scattering and the enhancement of the surface peak in RBS-channeling yield which was measured by using a 1.5 MeV 4He+-ion beam. © 1999 American Institute of Physics.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1063/1.370293
    Library Location Call Number Volume/Issue/Year Availability
    BibTip Others were also interested in ...
    Paper (German National Licenses)
    Fulltext
  • 3
    Electronic Resource
    Electronic Resource
    Characterizing the Gel to Liquid Crystal Transition in Lipid-Bilayer Model Systems (1999)
    Springer
    The chemical educator 4 (1999), S. 12-15 
    Details
    ISSN: 1430-4171
    Source: Springer Online Journal Archives 1860-2000
    Topics: Chemistry and Pharmacology
    Notes: Abstract A laboratory exercise that introduces differential scanning calorimetry (DSC) is presented. In order to connect this basic physical chemistry technique with an application in the biological sciences, students investigated the thermodynamic properties of lipid-bilayer model compounds. DSC was used to characterize the gel-to-liquid-crystal transition for three phosphatidylcholines of varying acyl chain length. The laboratory exercise is suitable only for students with some background in physical chemistry and biochemistry.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/s00897990273a
    Library Location Call Number Volume/Issue/Year Availability
    BibTip Others were also interested in ...
    Paper (German National Licenses)
    Fulltext
  • 4
    Electronic Resource
    Electronic Resource
    A case of Down's syndrome associated with progressive extradural neuroblastoma (1999)
    Springer
    Pediatric surgery international 15 (1999), S. 373-375 
    Details
    ISSN: 1437-9813
    Keywords: Key words Down's syndrome ; Neuroblastoma
    Source: Springer Online Journal Archives 1860-2000
    Topics: Medicine
    Notes: Abstract We describe a case of Down's syndrome associated with progressive extradural neuroblastoma. Postmortem aspiration of the bone marrow revealed diffuse infiltration by tumor cells, in which trisomy 21 was found by fluorescence in hybridization in situ.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/s003830050601
    Library Location Call Number Volume/Issue/Year 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...