Using Chandra images of cluster cores with clear radio bubbles, we have determined k, which is the ratio of the total particle energy to that of the electrons radiating between 10 MHz and 10 GHz. Radiative and dynamical constraints on the bubbles indicate that the ratio of the energy factor, k, to the volume filling factor, f , lies within the range 1 . k/f . 1000. Assuming pressure equilibrium...

To achieve the benefits that composite restorations can provide, it is incumbent on dentists to understand the importance of proper finishing and polishing techniques and how to incorporate them appropriately into everyday practice. A smooth surface finish is clinically necessary because the presence of surface irregularities from poor finishing and polishing can lead to staining, plaque retent...

The statistics of using downhole electric submersible pump (ESP) units in the oil fields Eurasia show that hydroabrasive wear is a common cause ESP emergency failures. authors this study theoretically and experimentally investigated peculiarities water–abrasive components. research methodology construction laboratory bench are described, results experimental studies determination changes abrasi...

A primary function of males for many species involves mating with females for reproduction. Drosophila melanogaster males respond to the presence of other males by prolonging mating duration to increase the chance of passing on their genes. To understand the basis of such complex behaviors, we examine the genetic network and neural circuits that regulate rival-induced Longer-Mating-Duration (LM...

Block mutations were constructed in helical stems II, III, IV and V of Xenopus laevis oocyte 5S RNA. The affinities of these mutants for binding to transcription factor IIIA (TFIIIA) were determined using a nitrocellulose filter binding assay. Mutations in stems III and IV had little or no effect on the binding affinity of TFIIIA for 5S RNA. However, single mutants in stems II and V (positions ...