Alexis Barna

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The bacteriophage population is large, dynamic, ancient, and genetically diverse. Limited genomic information shows that phage genomes are mosaic, and the genetic architecture of phage populations remains ill-defined. To understand the population structure of phages infecting a single host strain, we isolated, sequenced, and compared 627 phages of(More)
To evaluate the capacity of different metabolic indices to predict performance in middle distance swimming, 15 competitive swimmers performed a submaximal and a maximal 400 metres freestyle swimming event. Expired gases were collected in Douglas bags immediately after the events for the determination of VO2 max. Arterialized blood samples were collected for(More)
AIM To determine the sensitivity of methods for detection of injured and uninjured Escherichia coli O157:H7 (E. coli O157) in raw and pasteurized milk. METHODS AND RESULTS Raw milk, pasteurized milk with 1.5% fat content and pasteurized milk with 3.5% fat content were spiked with E. coli O157 at low levels. The samples were enriched in modified tryptone(More)
We read with great interest the article by Akutagawa et al. in this journal in which the authors describe that PI3K inhibitors unexpectedly profoundly inhibited myeloproliferation in an myelodysplastic/myeloproliferative neoplasm mouse model driven by hyperactive RAS, suggesting a new therapeutic strategy in juvenile myelomonocytic leukemia (JMML) and(More)
We have measured the yields of secondary particles produced at zero degrees to the direction of the incident beam in a beryllium target bombarded by 16 GeV/c electrons from the new Stanford Linear Electron Accelerator. The target was 1.8 radiation lengths thick. We had three purposes in making these measurements. First, we believed that the most intense(More)
The paper describes the electronic instrumentation for a nonintercepting gamma-beam monitor in use at the 82” bubble chamber at the Stanford Linear Accelerator Center. The position and the intensity of the beam are monitored by four shower-counters placed behind a 2-mm collimator. The bubble chamber flash-illumination and cameraadvance are inhibited when(More)
Medium-energy (some tens of keV) ion irradiation is frequently used in various technologies. It is well known that during this irradiation serious alterations are introduced to the material, changing its structure, composition, etc. While there are studies on the amorphization, no results have been reported on the medium-energy ion beam-induced mixing,(More)
A novel, rapid, and simple method is described for the preparation of InP based samples for investigation by transmission electron microscopy (TEM). The key feature of the technique is Ar+ ion bombardment in an iodine ambient. Cross sectional micrographs of Au/InP samples are shown as an example. The technique developed produces a large area of transparent(More)
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