Frequency dependent rheology of vesicular rhyolite

Microrheology probes length scale dependent rheology.

We exploit the power of microrheology to measure the viscoelasticity of entangled F-actin solutions at different length scales from 1 to 100 microm over a wide frequency range. We compare the behavior of single probe-particle motion to that of the correlated motion of two particles. By varying the average length of the filaments, we identify fluctuations that dissipate diffusively over the fila...

Frequency of Obsessive-compulsive Disorder in Methamphetamine-Dependent Subjects

Background and Objectives: Obsessive-compulsive disorder (OCD) is a type of anxiety disorder, which can be manifested as comorbidity with other psychological disorders. Prompt diagnosis and treatment of this comorbidity plays an important role in treatment of the main disorder. This study aimed to assess the frequency of OCD in methamphetamine-dependent individuals. <stro...

Shock compression and isentropic release of rhyolite

Shock-wave equation of state of rhyolite

We have obtained new shock-wave equation of state (EOS) and release adiabat data for rhyolite. These data are combined with those of Swegle (1989, 1990) to give an experimental Hugoniot which is described by Us=2.53(±0.08)+3.393(±0.37)up for up<0.48 km s−1 , Us=3.85(±0.05)+0.65(±0.03)up for 0.48≤up<2.29 km s−1 , Us=1.52(±0.08)+1.67(±0.02)up for 2.29≤up<4.37 km s−1 , and Us=3.40(±034)+ 1.24(±0.0...

Density-dependent selection in vesicular stomatitis virus.

We used vesicular stomatitis virus to test the effect of complementation on the relative fitness of a deleterious mutant, monoclonal antibody-resistant mutant (MARM) N, in competition with its wild-type ancestor. We carried out competitions of MARM N and wild-type populations at different multiplicities of infection (MOIs) and initial ratios of the wild type to the mutant and found that the fit...