A5091788913- Neutrino Physics Research
- Atomic and Subatomic Physics Research
- Chemical Reactions and Isotopes
- Experimental Learning in Engineering
- Muon and positron interactions and applications
- Advanced Fiber Laser Technologies
- Photonic Crystal and Fiber Optics
- Particle physics theoretical and experimental studies
- Spectroscopy Techniques in Biomedical and Chemical Research
- ICT Impact and Policies
- Chemical Reaction Mechanisms
- Molecular Spectroscopy and Structure
- Fluorine in Organic Chemistry
- Atomic and Molecular Physics
- Customer Service Quality and Loyalty
- Spectroscopy and Laser Applications
- Terahertz technology and applications
- Particle Detector Development and Performance
- Biomedical and Engineering Education
- Spectroscopy and Quantum Chemical Studies
- Optical Coherence Tomography Applications
- Sirtuins and Resveratrol in Medicine
- Advanced Aircraft Design and Technologies
- Microbial Inactivation Methods
- Coordination Chemistry and Organometallics
Cardiff University
2014-2021
University of Southampton
2013-2014
Swansea University
2006-2013
Universidad Complutense de Madrid
2012
Novartis (France)
2011
Loughborough University
2005-2007
AstraZeneca (United Kingdom)
2005-2007
University of Wales
2006
General Electric (United States)
1978
Memorial Sloan Kettering Cancer Center
1973
An integrated concept for post-acquisition spectrum analysis was developed in-line (real-time) and off-line applications that preserves absolute spectral quantification; after the initializing parameter setup, only minimal user intervention is required. This evaluation suite composed of a sequence tasks specifically addressing cosmic ray removal, background subtraction, peak fitting, together with treatment two-dimensional charge-coupled device array data. One may use any individual steps on...
We have recorded Raman spectra for all hydrogen isotopologues, using a CW Nd:YVO4 laser (5 W output power at 532 nm) and high-throughput (f/1.8) spectrograph coupled to Peltier-cooled (200 K) CCD-array detector (512 × 2048 pixels). A (static) gas cell was used in measurements. investigated (i) "pure" fillings of the homonuclear isotopologues H2, D2, T2; (ii) equilibrated binary H2 + T2, D2 thus providing heteronuclear HD, HT, DT controlled manner; (iii) general mixtures containing varying...
A fully fiberized, single-polarization, gain-switched diode-seeded fiber master oscillator power amplifier (MOPA) system is demonstrated delivering 28 ps pulses at variable repetition frequencies ranging from 53 MHz up to 858 MHz. An average signal output of 200 W was achieved with good OSNR for all operating frequencies. maximum pulse energy 3.23 μJ a frequency achieved, corresponding peak 107 kW. The extraction higher limited primarily by the onset nonlinear effects such as SRS which lead...
AbstractThe gas circulation loop LOOPINO has been set up and commissioned at Tritium Laboratory Karlsruhe (TLK) to perform Raman measurements of circulating tritium mixtures under conditions similar the inner system neutrino-mass experiment KATRIN, which is currently construction. A custom-made interface used connect containing measurement cell, located inside a glove box, with setup standing on outside. sample (purity > 95 %, 20 kPa total pressure) was circulated in for more than three...
The functional and systems approaches to the study of marketing offer two alternative means understanding discipline. Do these contradict or complement each other, do they have no relationship at all? This article provides (1) a fresh look approach, (2) review general (3) framework show their synthesize views marketing.
Abstract Standard 1D TOCSY and NOE experiments have limitations where signals are severely overlapped. Here, two recently published selective excitation methods evaluated, the first of which uses a chemical shift filter to select single resonance based on its shift, second is doubly experiment comprising preparation step subsequent NOE. We also demonstrate improvement in spectral quality obtained by use zero quantum filter, incorporated into both these experiments. The application different...
The Raman depolarization ratios for individual Q 1 (J”) branch lines of all diatomic hydrogen isotopologues – H 2 , HD, D HT, DT, and T were measured, rotational levels with population larger than 1/100 relative to the Boltzmann maximum at room temperature. For these measurements, experimental setup normally used monitoring tritiated molecules KArlsruhe TRItium Neutrino experiment was adapted optimally control excitation laser power polarization, precisely define light collection geometry....
The pure rotational and vibration-rotational Stokes Raman spectra of flowing gaseous mixtures the hydrogen isotopomers H 2 , HD, D were measured in order to test performance proposed tritium purity monitoring system designed for Karlsruhe Tritium Neutrino (KATRIN) mass experiment, which utilises 532 nm CW laser excitation fibre-coupled scattered light collection, exploiting 90° observation geometry. Short (100–300 s) exposure times used simulate real-time in-line measurement isotopomer...
In this paper we discuss the implementation of Raman spectroscopy for compositional analysis, and monitoring control tritium-carrying gas flows. Specifically, how criteria detection handling tritium impact on conceptual design actual system suitability performance in applications such as KATRIN experiment or ITER fuel cycle, which require real-time, in-line control.
The spectroscopy and kinetics of the tyrosinase catalyzed trans-resveratrol oxidation were investigated by measuring both UV-vis absorption spectra over 200-500 nm range Raman 600-1800 cm(-1) region. Room temperature spectra, as a function time, showed presence two isosbestic points located at λ(1) = 270 λ(2) 345.5 delimiting different regions: reactant region around 300 nm, where decreased with product low wavelength (λ < 260 nm) high > 390 zone in which increased time until, cases,...
We demonstrate a gain-switched diode-seeded, ytterbium-doped fiber based master oscillator power amplifier (MOPA) system, capable of delivering 2.4 μJ, 35 ps pulses at repetition frequency 215 MHz in single-polarization, close to diffraction limited beam. are aware that the corresponding average > 500 W is record for such MOPA system. Further pulse energy scaling was primarily by onset nonlinear effects as self-phase modulation and stimulated Raman scattering which led compromised quality...
In this article, we address the notoriously difficult problem to quantitatively link measured Raman depolarization values theoretical polarizability tensor quantities, since quantum calculations do not incorporate experimental parameters. For this, introduce a numerical model calculate, for realistic configurations, effective line strength functions, Φ , which find their way into ratios, ρ . The is based on interlinked integrations over angles in light collection path and finite source...
The functional and systems approaches to the study of marketing offer two alternative means understanding discipline. Do these contradict or complement each other, do they have no relationship at all? This article provides (1) a fresh look approach, (2) review general (3) framework show their synthesize views marketing.
The responsivity of optical fibers to refractive index can be enhanced using high-order skew rays compared with meridional rays. Skew have a much higher number reflections increased interaction length along the core-cladding interface, which gives rise stronger interactions external medium. Reflection/transmission-type refractometric sensors based on twin-coupled-core and multimode showed one/two orders magnitude increase in ray excitation. sensitivity for two types are ~2000%/RIU,...
This paper explores the role of research universities in creating radical new products. Existing activities include cooperative research, entrepreneurial activities, technical publications and student training. While each these are valued endeavours, none them address scope issues confronting task commercialising technology. Industry operate at different levels development process. difficulties needs examined found to be inconsistent with present university activities. The need for develop...
Traditional practical work for higher education in STEM subjects is under pressure from rising student numbers and adesired increase active learning. Investing more buildings staff financially challenging, while stretching existing resources affects outcomes, health, participation. A pragmatic approach to embrace a less instrumentalist view of physical spaces instead adopt critical post-humanist which mixes both humanity technology achieve sum greater than the parts, not bound by limits...
Kinetics and products of reaction 4-R-styrenes (R = Me, H, Cl, CF3, NO2) with nitric acid in dichloromethane are reported. Reaction occurs the alkene group aromatic nitration is insignificant. With increasingly electron-withdrawing substituents changes from one which third order gives rise to 1-arylethyl nitrate, higher 2-nitro-1-arylethyl nitrate (β-nitro-nitrate). Both reactions proceed through transition states carbocation character, by initial β-addition H+ NO2+ respectively. The...
Transforming Musicology is a three-year project undertaking musicological research exploring state-of-the-art computational methods in the areas of early modern vocal and instrumental music (mostly for lute), Wagner’s use leitmotifs, as represented social media. An essential component work involves devising semantic infrastructure which allows data, results to be published form that enables others incorporate into their own discourse. This includes ways capturing processes musicology...
Abstract Meeting Programme Prof David O'Hagan [University of St Andrews, UK]— Enzymatic C– 18 F Bond Synthesis: A New Strategy for PET Synthesis . Dr Michael Carroll Newcastle, Studies Towards 6‐[ F]Fluoro‐m‐tyramine using Iodonium Salts John Gardiner Manchester, Methods Isotopomer‐Versatile 13 C‐Labelled Carbohydrates William Lockley Surrey, Some Catalytic Systems Isotope‐Exchange Labelling Rustidge [Scynexis Europe, 14 C‐Synthesis — Not Always as Easy it Looks Richard Hartley Glasgow, The...
This paper describes a quality control technique used by the central headquarters operation of Continuous Air Monitoring Program in an ejjort to insure valid data production from instruments located at remote sampling stations. The procedure consists preparation 0.10 2.00 ppm mixtures SO2 or NO2 duplicate Mylar bags, each encased corrugated box. These are analyzed during make-up duplication. One box is shipped field station where it on-site. mixture lab same time. Correlation between...
Detailed studies of the behaviour positrons in selected room temperature molecular gases at densities below 1 amagat (≡ 2.69 × 1025 molecules m−3) have allowed isolation two- and three-body effects upon rate annihilation. Investigations gas mixtures helped removing ambiguities interpretation data noted first study this phenomenon [1].