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Saroj Kumar Sahoo,Mamata Mohapatra,Shashi Anand 한국물리학회 2013 THE JOURNAL OF THE KOREAN PHYSICAL SOCIETY Vol.62 No.2
A series of nano ceria samples containing 0 to 2 mol% europium were synthesized following the coprecipitation hydrothermal technique. The X-ray diffraction patterns showed peaks corresponding to the fluorite structure of cubic ceria with shifting of the peak positions, but did not show any Eu-related peaks. The fourier transform infrared (FTIR) spectra of all the samples showed four bands that could be attributed to Ce-O stretching vibrations, formation of nano-crystalline particles, −HOH bending, and −OOH and −OH stretching vibrations. The Raman spectra of all the samples showed a sharp and intense Raman shift at around 460 - 462 cm<sup>−1</sup> corresponding to the triplydegenerate F<sub>2g</sub> mode. The intensity of the Raman peaks showed variations in intensities. The transmission electron microscope (TEM) images of typical samples revealed that the shapes and the sizes of the particles were not much affected after Eu doping in the studied range though Eu doping resulted in agglomerations of nanoparticles. Broad absorption peaks centered at 292, 332, 336, 310, and 294 nm were observed for 0, 0.25, 0.5, 1, and 2 mol % Eu-doped ceria in the UVVis spectra with direct band gaps of 3.6, 2.75, 2.75, 2.75, and 3.25 eV, respectively.The smaller values of the indirect band gap indicated that Eu-doped nanoparticles were available to assist the indirect electron transition from the valence band to the conduction band. The emission peaks for the spectra obtained by exciting at 300 nm were observed at 355, 405, 396, 387, and 380 nm for pure ceria sample and 0.25, 0.5, 1, and 2 mol% Eu-doped samples, confirming the red shift in all the doped samples. The spectra for Eu-doped samples obtained by exciting at 500 nm showed three peaks in the orange-red region corresponding to the 5D<sub>0</sub> ∪ 7F<sub>j</sub> (j = 0 - 4) transitions of Eu<sup>3+</sup>.
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Electronic nutritional intake assessment in patients with urolithiasis: A decision impact analysis
Avory M. Heningburg,Anand Mohapatra,Aaron M. Potretzke,Alyssa Park,Alethea G. Paradis,Joel Vetter,Adrienne N. Kuxhausen,Leslie D. McIntosh,Anthony Juehne,Alana C. Desai,Gerald L. Andriole,Brian M. Ben 대한비뇨의학회 2016 Investigative and Clinical Urology Vol.57 No.3
Purpose: To evaluate a physician's impression of a urinary stone patient's dietary intake and whether it was dependent on the medium through which the nutritional data were obtained. Furthermore, we sought to determine if using an electronic food frequency questionnaire (FFQ) impacted dietary recommendations for these patients. Materials and Methods: Seventy-six patients attended the Stone Clinic over a period of 6 weeks. Seventy-five gave consent for enrollment in our study. Patients completed an office-based interview with a fellowship-trained endourologist, and a FFQ administered on an iPad. The FFQ assessed intake of various dietary components related to stone development, such as oxalate and calcium. The urologists were blinded to the identity of patients' FFQ results. Based on the office-based interview and the FFQ results, the urologists provided separate assessments of the impact of nutrition and hydration on the patient's stone disease (nutrition impact score and hydration impact score, respectively) and treatment recommendations. Multivariate logistic regressions were used to compare pre-FFQ data to post-FFQ data. Results: Higher FFQ scores for sodium (odds ratio [OR], 1.02; p=0.02) and fluids (OR, 1.03, p=0.04) were associated with a higher nutritional impact score. None of the FFQ parameters impacted hydration impact score. A higher FFQ score for oxalate (OR, 1.07; p=0.02) was associated with the addition of at least one treatment recommendation. Conclusions: Information derived from a FFQ can yield a significant impact on a physician's assessment of stone risks and decision for management of stone disease.
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