Marc M Hirschmann

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PURPOSE To investigate the relationship between quantitative magnetic resonance imaging (qMRI) and contrast enhancement in multiple sclerosis (MS) lesions. We compared maps of T1 relaxation time, proton density (PD), and magnetization transfer ratio (MTR) between lesions with and without contrast enhancement as quantified by the amount of T1 shortening(More)
In most cases authors are permitted to post their version of the article (e.g. in Word or Tex form) to their personal website or institutional repository. Authors requiring further information regarding Elsevier's archiving and manuscript policies are encouraged to visit: Keywords: magma ocean earth's early atmosphere oxygen fugacity deep carbon cycle a b s(More)
The suggestion that the transition zone of Earth's mantle (410-670 km in depth) is enriched in water is of great possible significance to the geodynamics and geochemistry of Earth's interior, as well as for the role of the mantle in the global water cycle. Huang et al. compare the effect of water on electrical conductivities of transition-zone phases to(More)
—The upper mantle is widely considered to be heterogeneous, possibly comprising a " marble-cake " mixture of heterogeneous domains in a relatively well-mixed matrix. The extent to which such domains are capable of producing and expelling melts with characteristic geochemical signatures upon partial melting, rather than equilibrating diffusively with(More)
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