Introduction: On the basis of several experiments on separates of the EH5 chondrite St. Mark’s, we will argue that the “subsolar” noble gas component is a mixture of solar-like, Qand terrestrial noble gases. The subsolar noble gas component has been found, in particular, in E chondrites [1,2] but also in other meteorite classes (e.g. aubrites, CO or CH chondrites [3-5]). This component is eleme...

We present experimental and theoretical results on high-harmonic generation in noble gases using an 805 nm, 25 fs, titanium-doped sapphire laser. The harmonic energies observed are unexpectedly high when compared with experimental and theoretical results to date for longer excitation pulses. We observe that the efficiency of harmonic production is highest for shorter pulses. Furthermore, the wa...

The present interest in the physiology of inert gases makes desirable a more accurate and reproducible method for determining the inert gas content of biological fluids than is currently available (2). This communication describes such a method. The method has been tested on water and used to determine the solubility of the inert gas of air in human urines of different solute concentrations at ...

The development of low energy cost membranes to separate He from noble gas mixtures is highly desired. In this work, we studied He purification using recently experimentally realized, two-dimensional stanene (2D Sn) and decorated 2D Sn (SnH and SnF) honeycomb lattices by density functional theory calculations. To increase the permeability of noble gases through pristine 2D Sn at room temperatur...

B R A D L E Y D . C E Y , * , † G . B R Y A N T H U D S O N , ‡ J E A N E . M O R A N , ‡ A N D B R I D G E T R . S C A N L O N § Department of Geological Sciences, Jackson School of Geosciences, University of Texas at Austin, Austin, Texas 78712, Bureau of Economic Geology, Jackson School of Geosciences, University of Texas at Austin, Austin, Texas 78712, and Chemical Sciences Division, Lawren...

K edge absorption spectra of elements from Ge to Br in gaseous hydrides were measured at the BM 29 station of ESRF with noise level as low as 2x10(-5), so far achievable only on noble gases. The dominant feature of the spectra is the atomic background similar to that of Kr and comparable to it in the quality of detail. Onto the background, a smooth weak EXAFS signal due to the hydrogen neighbor...

The abundance and isotopic composition of all noble gases are reported in the Wellman chondrite, and the abundance and isotopic composition of xenon and krypton are reported in the gases released by stepwise heating of the Tell and Scurry chondrites. Major changes in the isotopic composition of Xe result from radiogenic Xe129 and from variations in the isotopic mass fractionation pattern in the...

Introduction The use of nanoparticles for biomedical applications has benefited from rapid progress both in the nanoscale synthesis of materials with specific optical [1] and magnetic properties [2], and in the biofunctionalization of surfaces, allowing targeting in-vivo tracking, and therapeutic action [3]. For magnetic resonance imaging (MRI), superparamagnetic nanoparticles [2] have extended...

Horizontal drilling and hydraulic fracturing have enhanced energy production but raised concerns about drinking-water contamination and other environmental impacts. Identifying the sources and mechanisms of contamination can help improve the environmental and economic sustainability of shale-gas extraction. We analyzed 113 and 20 samples from drinking-water wells overlying the Marcellus and Bar...