The Mössbauer spectra of nanoferrite materials such as Ni0.25Mn0.75Fe2O4, Co0.5Mn0.5Fe2O4 and Ni0.4Co0.6Fe2O4 have been reported and the above materials were prepared by sol-gel combustion method using metal nitrates as source material and Polyvinyl alcohol(PVA) as...

Intermolecular hydrogen bonds of the type N–H...N in crystals of imidazole and its 4-substituted and 4,5-disubstituted derivatives were studied by N CP/MAS NMR and an ab initio molecular orbital (MO) calculation. In the N CP/MAS NMR spectrum of each of the imidazole derivatives, two peaks due to the two different functional groups, >NH and =N-, were observed. The value of the N isotropic chemic...

INTRODUCTION The objective of this report is to determine physician assistant (PA) productivity in an academic emergency department (ED) and to determine whether shift length or department census impact productivity. METHODS A retrospective chart review was conducted at a tertiary ED during June and July of 2007. Productivity was calculated as the mean number of patients seen each hour. Analy...

A persistent challenge in membrane biophysics has been to quantitatively predict how membrane physical properties change upon addition of new amphiphiles (e.g., lipids, alcohols, peptides, or proteins) in order to assess whether the changes are large enough to plausibly result in biological ramifications. Because of their roles as general anesthetics, n-alcohols are perhaps the best-studied amp...

INTRODUCTION The mean emergency department (ED) length of stay (LOS) is considered a measure of crowding. This paper measures the association between LOS and factors that potentially contribute to LOS measured over consecutive shifts in the ED: shift 1 (7:00 am to 3:00 pm), shift 2 (3:00 pm to 11:00 pm), and shift 3 (11:00 pm to 7:00 am). METHODS SETTING University, inner-city teaching hos...

Stressors as subtle as night work or shift work can lead to irregular menstrual cycles, and changes in reproductive hormone profiles can adversely affect bone health. This study was conducted to determine if stresses associated with the disruption of regular work schedule can induce alterations in ovarian function which, in turn, are associated with transient bone resorption. Urine samples from...