113 research outputs found
Synthesis of 3 Hâlabeled sympathomimetic amines for neuronal mapping
The synthesis of two tritium labeled sympathomimetic amines, (R)â(â)âphenylephrine and (1R,2S)â(â)â meta âhydroxyephedrine, is described. The tritium label was introduced into the aromatic ring in the final step by catalytic reductive dehalogenation of the corresponding iodinated precursor. (1R,2S)â(â)â meta âhydroxyephedrine was synthesized in four steps from commercially available metaraminol. A novel HPLC purification method provided the labeled compounds in a medium ready for direct animal evaluation. Chemical and radiochemical purity was â„98%; specific activity was â„ 22 Ci/mmol.Peer Reviewedhttp://deepblue.lib.umich.edu/bitstream/2027.42/90370/1/2580280713_ftp.pd
Accounting for convective effects in zero-Mach-number thermoacoustic models
This paper presents a methodology to account for some mean-flow effects on thermo-acoustic instabilities when using the zero-Mach-number assumption. It is shown that when a computational domain is represented under the M=0 assumption, a nonzero-Mach-number element can simply be taken into account by imposing a proper acoustic impedance at the boundaries so as to mimic the mean flow effects in the outer, not computed flow domain. A model that accounts for the coupling between acoustic and entropy waves is presented. It relies on a âdelayed entropy coupled boundary conditionâ (DECBC) for the Helmholtz equation satisfied by the acoustic pressure. The model proves able to capture low-frequency entropic modes even without mean-flow terms in the fluctuating pressure equation
Have You Voted? Teaching OSCOLA with Mentimeter
This article details a small project undertaken by Information Skills Advisers at London South Bank University to increase student engagement in lecture theatre settings through the use of a web-based audience response system (ARS), Mentimeter. Supporting the School of Law, librarians delivered an interactive OSCOLA referencing session to a large capacity lecture theatre. A previous session was redesigned to increase student engagement and active learning utilising interactive quiz questions which students answered using mobile devices. The majority of feedback from students and staff who participated in this pilot project was positive and showed an increase in student engagement. This article is based on the presentation, âHave You Voted?: Teaching OSCOLA with Mentimeterâ delivered at the BIALL Annual Conference 2017. It will examine the process of adapting a lecture to include interactive content using an ARS, and will discuss the outcomes of the pilot session and explore benefits and challenges inherent in using technology of this type in a large classroom
Reheat Buzz An acoustically driven combustion instability
Available from British Library Document Supply Centre- DSC:D59308 / BLDSC - British Library Document Supply CentreSIGLEGBUnited Kingdo
Some Triton and Other Nuclear Magnetic Resonance Studies.
A detailed description is given, for the first time, of the practical operation of a pulsed Fourier transform spectrometer as a routine proton instrument. The application of continuous wave and pulsed Fourier transform Nuclear Magnetic Resonance spectrometry to the examination of tritiated organic compounds has been studied. Methods have been developed for obtaining spectra from material containing one millicurie of tritium, or less, and for internally referencing such spectra, for comparison with the protonated material. The application of a Nuclear Magnetic Resonance spectrometer/ computer system to various kinetic and other problems has been studied
Some Triton and Other Nuclear Magnetic Resonance Studies.
A detailed description is given, for the first time, of the practical operation of a pulsed Fourier transform spectrometer as a routine proton instrument. The application of continuous wave and pulsed Fourier transform Nuclear Magnetic Resonance spectrometry to the examination of tritiated organic compounds has been studied. Methods have been developed for obtaining spectra from material containing one millicurie of tritium, or less, and for internally referencing such spectra, for comparison with the protonated material. The application of a Nuclear Magnetic Resonance spectrometer/ computer system to various kinetic and other problems has been studied
- âŠ