James Stuart

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We provide a simple theoretical model for the quasar luminosity function at high red-shifts that naturally reproduces the statistical properties of the luminous SDSS quasar sample at redshifts z ∼ 4.3 and z 5.7. Our model is based on the assumptions that quasar emission is triggered by galaxy mergers, and that the black hole mass is proportional to a(More)
The virulent organism Staphylococcus aureus produced brain abscesses that were quantitatively and qualitatively different from those caused by less virulent organisms. S. aureus abscesses created larger lesions, as earlier ependymitis, delayed progress toward healing, and caused areas of inflammatory escape outside the collagen capsule. Imaging tests(More)
On 25 June 2013, Germany reported three cases of invasive meningococcal disease (IMD) among men who have sex with men (MSM) caused by N. meningitidis serogroup C. All three isolates were serogroup C, PorA-VR1: 5-1; PorA-VR2: 10-8 and FetA: 3-6 and confirmed as ST-11/ET-15. On 26 June, Belgium retrospectively reported (via EPIS-VPD) a single case of IMD in a(More)
An LC/MS/MS method is described for the determination and confirmation of chloramphenicol (CAP) in cooked crab meat. It is an extension of another PRLNW-developed LC/MS/MS method (1, 2) for quantitative detection of chloramphenicol in shrimp at the low ppb level. The method involves: pulverization of cooked crab meat with dry ice; extraction of the CAP into(More)
  • James S. Stuart, Heidi S. Rupp, Jeffery A. Hurlbut, Barbara K. Neuhaus, Jeffrey A. Hurlbut
  • 2003
This method is an extension of LIB 4290 " LC/MS/MS Analysis of Chloramphenicol in Shrimp " 1 to include the analysis of chloramphenicol in cooked crawfish. Crawfish meat is fortified at levels from 0.10 to 1.0 ppb of chloramphenicol, then extracted and analyzed using LIB 4290 as a guide. The sample preparation remains unchanged, but some extraction(More)
OBJECTIVE The objective of this study was to review our pediatric emergency department's (ED's) utilization of computed tomography (CT) in the diagnosis of peritonsillar abscess (PTA) and treatment outcomes. METHODS This study used case series with chart review. RESULTS From January 2007 to January 2009, 148 patients were seen in our ED for possible(More)
The first galaxies to appear in the universe at redshifts z ∼ > 20 created ionized bubbles in the intergalactic medium (IGM) of neutral hydrogen (H I) left over from the Big-Bang. It is thought that the ionized bubbles grew with time, surrounded clusters of dwarf galaxies 1,2 and eventually overlapped quickly throughout the universe over a narrow redshift(More)
Exceptionally bright quasars with redshifts up to z=6.28 have recently been discovered 1. Quasars are thought to be powered by the accretion of gas onto supermassive black holes at the centres of galaxies. Their maximum (Eddington) luminosity is proportional to the mass of the black hole, and so these bright quasars are inferred to have black holes with(More)