نتایج جستجو برای: noble gas
تعداد نتایج: 252530 فیلتر نتایج به سال:
..................................................................................................................................... 3 Acknowledgements .................................................................................................................... 4 List of publications ...........................................................................................................
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Introduction Hyperpolarized noble gas magnetic resonance imaging (HP gas MRI) is a new and innovative imaging method that has made it possible, for the first time, to obtain high resolution MR images of air-filled organs such as the lungs, as well as lipid rich tissue such as the brain. Unlike conventional MRI which relies on the detection of water protons in biological tissue, HP gas MRI is ba...
[1] Noble gas concentrations and isotopic ratios are presented for 38 deep ( 0.5–3.6 km) brine samples in the Michigan Basin. These brine samples clearly show the presence of an important crustal component of He, Ne, Ar, and Xe. Both Arcrust and Xecrust display the presence of a strong vertical gradient along the sedimentary strata of the basin. We show that the in situ production for these two...
The noble gas temperature climate proxy is an established tool that has previously been applied to determine the source of groundwater recharge, however, unanswered questions remain. In fractured media (e.g., volcanic islands) recharge can be so rapid significantly depleted in heavy gases, indicating water retained concentrations from higher elevations. Previous studies rain samples have confir...
Introduction: Noble gas measurements in gas-rich impact-melt (GRIM) glasses in EET79001 shergottite showed that their elemental and isotopic composition is similar to that of the Martian atmosphere [1-3]. The GRIM glasses contain large amounts of Martian atmospheric gases. Those measurements further suggested that the Kr isotopic composition of Martian atmosphere is approximately similar to tha...
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