13 research outputs found
SPECTRA OF , DEUTERIUM SUBSTITUTED PYRIDINES
No full textAuthor Institution: Department of Chemistry, University of MassachusettsA vibrational study of pyridine and its seven deuterium substituted species is reported. New data for the isotopic molecules which have been previously studied are reported together with data for the three isotopic molecules never before reported. Liquid and vapor phase infrared spectra and liquid phase Raman spectra are considered. Raman spectra of weakly hydrogen-bonded complexes of the isotopic pyridines were also studied and were found to be of assistance in the assignment of fundamental Preliminary results will be reported
ESR OF Cr METAL MOLECULES AT
No full textD.P. DiLella, W. Limm, R.H. Lipson, M. Moskovits, and K.V. Taylor, J. Chem. Phys. 77, 5263 (1982).Author Institution: Department of Chemistry, University of Florida; Department of Chemistry, Indiana University BloomingtonK Natural Cr (I = 0) and Cr (I=3/2) (enriched to 96.9\%) metals were vaporized and trapped in neon and argon matrices at . X-band ESR spectra contained at least 15 line structure lines belonging to two molecules, besides those due to Cr atoms. Hyperfine splitting patterns showed that was not observed, supporting the assignment of its ground state as . Tentative analysis of the spectra indicates that both molecules are of high spin with the unpaired electrons is each interacting almost entirely with one Cr nucleus. Eight lines can be definitely assigned to one axial molecule (perhaps with symmetry) and can be fit to within 3G with the following parameters: MHz. The remaining lines appear to belong to an axial molecule with S=4 or 5, which could be a slightly bent with symmetry, in essential agreement with the Raman work of Dilella, et only the spectrum of this molecule appears in argon matrices
ENHANCED RAMAN SPECTRA OF SMALL MOLECULES ABSORBED TO A SILVER SURFACE
No full textAuthor Institution:We report the observation of the enhanced Raman spectra of molecules absorbed to the surface of a silver mirror. Typical experiments, including the sample preparation, are done at 12 K and the absorbants include CO, , ethylene, propylene and cis-2-butene. The Raman spectra include bands of both the surface absorbed molecules and of the bulk molecules. The surface bands are generally broader and shifted to lower frequency as compared to the bulk bands. As the thickness of the absorbent film is increased, the bulk spectra becomes more intense while the surface spectra remain constant. The intensity enhancement factor for the surface bands is as high as but is not the same for all enhanced bands of a given molecule. The intensity enhancement and frequency shift for bands corresponding to a particular vibrational mode give clues to the nature of the surface bonding. Enhanced Raman spectra were observed for all excitation wavelengths of an argon ion laser and for dye laser wavelengths available between 580 and 600 nm
Effectiveness of a Multidisciplinary Quality Improvement Initiative in Reducing Door‐to‐Balloon Times in Primary Angioplasty
No full textOrdering of organic molecules on templated surfaces
No full textThis thesis describes the controlled growth of molecular nanostructures using modified metallic and semiconductor surfaces. The Ag/Si(lll)-(root3 x root3),the Sn/Cu(100) surface alloy system and the Bi/Si(100) nanolines and (2xn) surfaces were all investigated as suitable substrates for the controlled growth of pentacene, (C22H14) or trimesic acid, (C6H3(COOH)3) organic molecules. The following techniques were used in this study; Scanning Tunnelling Microscopy (STM), Low Energy Electron Diffraction (LEED), Normal Incident X-Ray Standing Waves (NIXSW) and Temperature Programmed Desorption (TPD).
The room temperature growth and ordering of trimesic acid on the AgfSi(ll1)-(root3 x root3) surface was investigated. An oblique unit cell was determined and a model proposed for the highly ordered close-packed domains.
The discovery of a new submonolayer phase on Sn/Cu(100) and the re-examined known phase are discussed. New models for these reconstructions are proposed. Adsorption of trimesic acid at room temperature on the clean substrate the lowest Sn coverage phase were studied. Two new Sn coverage dependent structures were discovered and bonding schemes in upright and flat orientations are discussed.
BifSi(100)-(2xn) surface was exploited as a template for the ordered growth of pentacene, which exhibited orientation specific adsorption. The Bi/Si(100)-(2xn) single domain surface created on vicinal silicon was used to test the suitable of Daresbury 4.2 beamline for NIXSW Imaging experiments and the quality of the results are discussed
High precision measurement of the form factors of the semileptonic decays K± → π0l±ν (Kl3) in NA48/2
No full textThe data collected by NA48/2 in 2003-2004 allowed several precise measurements in the charged kaon decay sector. In this paper we present the results obtained using a sample of 2.5×106 K± → π0μ±ν (Kμ3) and 4.0×106 K × → π0l ±ν (Ke3) events, collected in 2004 using a minimal trigger configuration. This unbiassed sample of kaon decays allows a high precision measurement of the semileptonic form factors. © Copyright owned by the author(s)
ChPT tests at NA62
No full textThe NA62 experiment at CERN SpS collected a large sample of charged kaon decays with a low intensity beam and minimum bias trigger conditions in 2007. This allowed measurements of a number of rare decays that are difficult to address in conventional high intensity experiments with highly selective trigger conditions. In particular, large samples of K± →π±γ γ and K± →e± νγ decays have been collected, allowing precision tests of the Chiral Perturbation Theory. The status and first results of these analyses are presented. © Copyright owned by the author(s)
ChPT tests at NA62
No full textThe NA62 experiment at CERN SpS collected a large sample of charged kaon decays with a low intensity beam and minimum bias trigger conditions in 2007. This allowed measurements of a number of rare decays that are difficult to address in conventional high intensity experiments with highly selective trigger conditions. In particular, large samples of K± →π±γ γ and K± →e± νγ decays have been collected, allowing precision tests of the Chiral Perturbation Theory. The status and first results of these analyses are presented. © Copyright owned by the author(s)
High precision measurement of the form factors of the semileptonic decays K± → π0l±ν (Kl3) in NA48/2
No full textThe data collected by NA48/2 in 2003-2004 allowed several precise measurements in the charged kaon decay sector. In this paper we present the results obtained using a sample of 2.5×106 K± → π0μ±ν (Kμ3) and 4.0×106 K × → π0l ±ν (Ke3) events, collected in 2004 using a minimal trigger configuration. This unbiassed sample of kaon decays allows a high precision measurement of the semileptonic form factors. © Copyright owned by the author(s)
Creation and the people of God : creation tradition and the boundaries of the covenant in Second Temple Jewish writings and in Paul's letter to the Galatians.
No full textSIGLEAvailable from British Library Document Supply Centre- DSC:DX186858 / BLDSC - British Library Document Supply CentreGBUnited Kingdo
