71,424 research outputs found
The Selected Letters of Tennesee Williams, Volume 2: 1945-1957
No full textEdited by Albert J. Devlin and Nancy M. Tischler New Directions hardcover, ISBN: 9780811216005, 22.95, 9/30/2007https://egrove.olemiss.edu/mwp_books/1396/thumbnail.jp
Evidence for the decay B0→J/ψω and measurement of the relative branching fractions of meson decays to J/ψη and J/ψη′
No full textFirst evidence of the B 0 → J / ψ ω decay is found and the B s 0 → J / ψ η and B s 0 → J / ψ η ′ decays are studied using a dataset corresponding to an integrated luminosity of 1.0 fb -1 collected by the LHCb experiment in proton-proton collisions at a centre-of-mass energy of sqrt(s) = 7 TeV. The branching fractions of these decays are measured relative to that of the B 0 → J / ψ ρ 0 decay:frac(B (B 0 → J / ψ ω), B (B 0 → J / ψ ρ 0)) = 0.89 ± 0.19 (stat) - 0.13 + 0.07 (syst),frac(B (B s 0 → J / ψ η), B (B 0 → J / ψ ρ 0)) = 14.0 ± 1.2 (stat) - 1.5 + 1.1 (syst) - 1.0 + 1.1 (frac(f d, f s)),frac(B (B s 0 → J / ψ η ′), B (B 0 → J / ψ ρ 0)) = 12.7 ± 1.1 (stat) - 1.3 + 0.5 (syst) - 0.9 + 1.0 (frac(f d, f s)), where the last uncertainty is due to the knowledge of f d / f s, the ratio of b-quark hadronization factors that accounts for the different production rate of B 0 and B s 0 mesons. The ratio of the branching fractions of B s 0 → J / ψ η ′ and B s 0 → J / ψ η decays is measured to befrac(B (B s 0 → J / ψ η ′), B (B s 0 → J / ψ η)) = 0.90 ± 0.09 (stat) - 0.02 + 0.06 (syst)
Letter from Carl Hayden to M. J. Riordan
No full textLetter from Carl Hayden to M. J. Riordan expressing his support for Coconino County in turning over the Bright Angel Trail to the federal government
Determination of Absolute Configuration Using Ab Initio Calculation of Optical Rotation
No full textAb initio Density Functional Theory (DFT) calculations of transparent
spectral region, discrete frequency specific rotations were used to assign the absolute
configurations (ACs) of: 1, 2H-naphtho[1,8-bc]thiophene 1-oxide; 2, m-F-phenyl glycidic
acid methyl ester; 3, o-Br-phenyl glycidic acid methyl ester; 4, p-CH3-phenyl glycidic
acid methyl ester; 5, 2-(1-hydroxyethyl)-chromen-4-one; and 6, 6-Br-2-(1-hydroxyethyl)-
chromen-4-one. The ACs of 5 and 6 were previously determined via X-ray crystallography
to be: 5, R(−)/S(+); 6, R(+)/S(−). The ACs obtained using []D are the same for
both 5 and 6: R(+)/S(−). We conclude that the previously reported AC of 5 is incorrec
Changing academic practice to prepare nursing undergraduates for an evidence-based approach
No full textEvidence based practice (EBP) has been accepted as a process to assist health professionals in clinical decision making to improve patient outcomes. It requires applying skills in a prescribed sequence to critique existing practices. Many countries, including Australia, require nurses to demonstrate competencies in EBP skills to be\ud
registered. In the last ten years, this has lead to universities incorporating EBP in undergraduate nursing degree courses. The literature reports many challenges including students’ difficulties in critically appraising research evidence, and their need for both simplification of the process and extensive support. The purpose of our study was to investigate the effectiveness of a standalone introductory EBP subject for a diverse group of third-year undergraduates, based on a novel but challenging approach to assessment. Despite many changes made in the second iteration of the subject, most students’ perceptions of the subject’s difficulty remained unchanged. This research aligns with the issues identified in the literature and has wider applicability to the teaching of rapidly changing disciplines, where evidence-driven consumers have easy access to information and expect up-to-date practices
Letter from M. J. Riordan, Arizona Lumber and Timber Company, to Carl Hayden
No full textLetter from M. J. Riordan to Carl Hayden expressing his opposition to the federal government's takeover of Bright Angel Trail
Many hands make light work
No full textThe responses of plants to the light environment have fascinated biologists for well over 100 years (Briggs, 2006). Early studies in photomorphogenesis focused necessarily on morphological aspects of plant responses; germination, seedling establishment, plant architecture, and flowering time are all regulated by light. More recently, and particularly with the advent of the genetic model Arabidopsis thaliana, the focus has shifted to understanding plant responses at the molecular level. Understanding and genetically manipulating these processes may provide the subtle control of plant growth that will permit successful alteration of these traits for agricultural benefit. This Focus Section, based on the Photomorphogenesis session at this year's Society for Experimental Biology annual conference, contains reviews directed at both the progress in understanding the molecular basis of light-signalling pathways and how to translate this information for agricultural gain
STRUCTURES OF SALT SOLUTIONS FROM MATRIX ISOLATION SPECTRA
No full textN. Smyrl and J.P. Devlin, J. Chem. Phys. 60, 2540 (1974). Ibid., 61, 1596 (1974).""Author Institution: Department of Chemistry, Oklahoma State UniversityThe vibrational spectra of simple contact ion pairs, such as and , isolated in argon matrices have been determined in previous More recently it has been shown that the cation distortion of the anion, as indicated by the magnitude of the splittinge £or the degenerate modes is sharply decreased in glassy water and glassy ammonia This phenomenon is attributed to the electron donor action associated with the partial solvation of the metal cations by the matrix molecules. In this paper the step-wise solvation of the cations in the contact ion pairs will be displayed in the variation in magnitude of the splitting of the degenerate modes for the complete range of argon-associating matrix compositions. Certain published liquid solution spectra will be considered in view of the new contact ion pair results
Determination of absolute configuration using vibrational circular dichroism spectroscopy: Phenyl glycidic acid derivatives obtained via asymmetric epoxidation using oxone and a keto bile acid
No full textThe (+)-enantiomers of the o-Br, m-F and p-CH3 derivatives of trans phenyl glycidic acid have been obtained from the
corresponding trans cinnamic acid derivatives using Oxone and the tri-keto bile acid dehydrocholic acid. Vibrational circular dichroism
(VCD) spectroscopy of their methyl esters has been used to determine their absolute configurations. In each case, the absolute
configurations of both methyl ester and parent acid were shown to be (2S,3R)-(+)/(2R,3S)-()
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