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ref: -0 tags: tungsten welding CVD arc braze 1971 date: 08-12-2014 20:56 gmt revision:0 [head]

Weldability of Tungsten and Its Alloys

  • tried relatively exotic brazing methods:
    • Niobium,
    • Tantalum
    • W - 26% Re
    • Mo
      • No mention of what we'll be doing (NiCr resistance wire -- only easily available fine wire)
  • Note that the ductile-to-brittle transition is low for their samples, 150-250C.
  • Samples made via arc-melting or WF + H2 CVD.

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ref: Kemp-1971.09 tags: globus pallidus striatum 1971 neuroanatomy date: 12-07-2011 04:03 gmt revision:1 [0] [head]

PMID-4399123[0] The connexions of the striatum and globus pallidus: synthesis and speculation. !! great figures, great synthesis !!

  • a striking feature of the striatum (caudate and putamen, functionally the same is the dense axonal plexus - this receives a major contribution from the contralateral branches the short axon terminals (interneurons) as well as afferent projections. perhaps the most important characteristic of the axonal plexus is that all the component fibers cross dendrites rather than lie parallel to them -- just like the cerebellum''.
  • the cerebellum also has excitatory input and inhibitory output. similar structure to do a similar thing? ++ plenty of interneurons ++plenty of dendritic spines.
  • all of the cerebral cortex projects to the cerebellum, even the visual cortex has projections to the pontine nuclei. however, there is an exceptionallly small projection from the visual cortex to both the cerebellum and striatum.

____References____

[0] Kemp JM, Powell TP, The connexions of the striatum and globus pallidus: synthesis and speculation.Philos Trans R Soc Lond B Biol Sci 262:845, 441-57 (1971 Sep 30)