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...

Introduction The noble gas xenon exerts neuroprotective effects after various insults, but availability of xenon is limited. Helium and argon are readily available noble gases, but the results of studies using helium as neuroprotective measure are mixed, and the effects of argon are less well studied. In a recent cardiac arrest (CA) study, 70% argon (in O2) administered for 1 hour post CA impro...

The formation of an excess of dissolved gas (“excess air”) in quasi-saturated media was studied by analyzing and interpreting dissolved noble gas concentrations in laboratory column experiments. Using quartz sand filled columns of 1 m length, two different experimental designs were realized. In the first, groundwater recharge was simulated by a unidirectional vertical water flow through the col...

Horizontal drilling and hydraulic fracturing have enhanced unconventional hydrocarbon recovery but raised environmental concerns related to water quality. Because most basins targeted for shale-gas development in the USA have histories of both active and legacy petroleum extraction, confusion about the hydrogeological context of naturally occurring methane in shallow aquifers overlying shales r...

Surface and Subsurface Geochemical Monitoring of an EOR-CO2 Field: Buracica, Brazil — This paper presents a surface and subsurface geochemical survey of the Buracica EOR-CO2 field onshore Brazil. We adopted a methodology coupling the stable isotopes of carbon with noble gases to investigate the adequacy of geochemical monitoring to track deep fluid leakage at the surface. Three campaigns of CO2...

thin films of sno2 nanowires were successfully prepared by using chemical vapor deposition (cvd) process on quartz substrates. afterwards, a thin  layer of palladium (pd) as a catalyst was coated on top of nanowires. for the deposition of pd, a simple and low cost technique of spray pyrolysis was employed, which caused an intensive enhancement on the sensing response of fabricated sensors. prep...

in this work, hierarchical wo3 core-shell microspheres were synthesized via a facile template-free precipitation method. gas sensing properties of the synthesized powder to acetone and some other volatile organic compounds were comparatively investigated with commercial wo3 nanoparticles. the synthesized and commercial powders were characterized by x-ray diffraction, scanning electron microscop...

This report summarizes some useful data on the transport characteristics of gas mixtures which are required for detection of charged particles in gas detectors. The requirements for high luminosity tracking are stringent and different at low and high momenta, representing a compromise between a fast gas mixture, small diffusion properties and having a small Lorentz angle, but high primary ioniz...

Introduction: A confusingly large number of noble gas components has been found in meteorites, based on distinct compositions, origins, carrier phases, or release characteristics [1]. The discovery that the carriers of the primordial noble gases survive acid treatment [2] led to the identification of several circumstellar grain types [3]. The oxidisable carbonaceous carrier “phase Q”, however, ...