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@ARTICLE{Armstrong:61830,
      author       = {Armstrong, B. D. and Lingwood, M.D. and McCarney, E.R. and
                      Brown, E.R. and Blümler, P. and Han, S.},
      title        = {{P}ortable {X}-band system for solution state dynamic
                      nuclear polarization},
      journal      = {Journal of magnetic resonance},
      volume       = {191},
      issn         = {1090-7807},
      address      = {Amsterdam [u.a.]},
      publisher    = {Elsevier},
      reportid     = {PreJuSER-61830},
      pages        = {273 - 281},
      year         = {2008},
      note         = {Record converted from VDB: 12.11.2012},
      abstract     = {This paper concerns instrumental approaches to obtain large
                      dynamic nuclear polarization (DNP) enhancements in a
                      completely portable system. We show that at fields of 0.35 T
                      under ambient conditions and at X-band frequencies, 1H
                      enhancements of >100-fold can be achieved using nitroxide
                      radical systems, which is near the theoretical maximum for
                      1H polarization using the Overhauser effect at this field.
                      These large enhancements were obtained using a custom built
                      microwave transmitter and a commercial TE102 X-band resonant
                      cavity. The custom built microwave transmitter is compact,
                      so when combined with a permanent magnet it is readily
                      transportable. Our commercial X-band resonator was modified
                      to be tunable over a range of approximately 9.5-10 GHz,
                      giving added versatility to our fixed field portable DNP
                      system. In addition, a field adjustable Halbach permanent
                      magnet has also been employed as another means for matching
                      the electron spin resonance condition. Both portable setups
                      provide large signal enhancements and with improvements in
                      design and engineering, greater than 100-fold 1H
                      enhancements are feasible.},
      keywords     = {Equipment Design / Equipment Failure Analysis / Magnetic
                      Resonance Spectroscopy: instrumentation / Magnetic Resonance
                      Spectroscopy: methods / Microwaves / Reproducibility of
                      Results / Sensitivity and Specificity / J (WoSType)},
      cin          = {ICG-3},
      ddc          = {550},
      cid          = {I:(DE-Juel1)ICG-3-20090406},
      pnm          = {Terrestrische Umwelt},
      pid          = {G:(DE-Juel1)FUEK407},
      shelfmark    = {Biochemical Research Methods / Physics, Atomic, Molecular
                      $\&$ Chemical / Spectroscopy},
      typ          = {PUB:(DE-HGF)16},
      pubmed       = {pmid:18226943},
      UT           = {WOS:000254800600012},
      doi          = {10.1016/j.jmr.2008.01.004},
      url          = {https://juser.fz-juelich.de/record/61830},
}