Introduction: The standing hypothesis for the formation of the lunar picritic glass beads is eruption in a volatile-driven fire fountain followed by degassing while suspended in a hot, turbulent vapor plume. Reanalysis of the Apollo 15 A, B, and C green glass beads from slide 15426,72, led to the discovery of beads with small patches of highly vesicular green glass adhering to their rims (fig. ...

We have developed a reliable high-throughput plasmid isolation system using a 96-well plate format. This system combines a novel glass bead micro-mixing method with modified alkaline lysis and Sephacryl S-500 DNA purification procedures. Mechanical forces generated by vortexing glass beads inside each well of the 96-well plates ensure that the bacterial pellets are homogeneously resuspended, th...

We investigate the elastic behavior and damage of weakly cemented granular media under external load with ultrasound. The cementation controlled experiments are performed by freezing the capillary liquid at the bead contact in a dense glass or polymeric [poly(methyl methacrylate)] bead pack wet by tetradecane of volume fraction ϕ = 0.1%-4%. When the pendular rings are solidified, an abrupt incr...

O1 Propagator-Resolved 2D Exchange in Porous Media in the Inhomogeneous Magnetic Field Lauren Burcaw 1, Mark Hunter 2, Paul Callaghan 2 1 Victoria University of Wellington, 2 SCPS, Victoria University of Wellington We present a propagator-resolved 2D exchange spectroscopy technique for observing fluid motion in a porous medium. The susceptibility difference between the matrix and the fluid is e...

Microbial plugging has been proposed as an effective low cost method of improving sweep efficiency by reducing permeability of water-swept regions of a reservoir. To optimize the field implementation of this method, better mechanistic and volumetric understanding of biofilm growth within a porous medium is needed. In particular, the engineering design hinges upon a quantitative relationship bet...

Platelet glass bead retention by the Salzman and infusion pump techniques were compared in 36 control individuals, 10 patients with von Willebrand's syndrome and four patients with thrombocytopathies. No significant differences between the results of the two assays were observed. Eleven percent or less of the control individuals had diminished platelet glass bead retention. The mean percentage ...

Investigating how tightly objects pack space is a long-standing problem, with relevance for many disciplines from discrete mathematics to the theory of glasses. Here we report on the fundamental yet so far overlooked geometric property that disordered mono-disperse spherical bead packs have significant local structural anisotropy manifest in the shape of the free space associated with each bead...

Large volume calorimeters are traditionally based on construction from high-density material or a “sandwich” construction of alternating layers of active and passive material. Dense scintillating material, made from materials such as BGO or lead-glass, is too costly to be used on a very large scale. In sandwich technology, energy resolution is often reduced due to a large fraction of the signal...

We conduct experiments to investigate the sintering of high-viscosity liquid droplets. Free-standing cylinders of spherical glass beads are heated above their glass transition temperature, causing them to densify under surface tension. We determine the evolving volume of the bead pack at high spatial and temporal resolution. We use these data to test a range of existing models. We extend the mo...