Browsing Administrative Staff Authors (Scholarly Publications) by Date of Publication
Now showing items 1-20 of 591
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Observation of pentacarbonylchromium on flash photolysis of exacarbonylchromium in cyclohexane solution
(1973)The first observable transient (lifetime > 50 ns) on flash photolysis of Cr(CO), is Cr(CO),, which is the precursor of two species previously assigned to the D,, and C,, forms of Cr(CO),, and now shown to arise ... -
Photochemistry of compounds of the main group elements
(1979)Photochemistry of Compounds of the Main Group Elements BY J. M. KELLY 1 Introduction Reports on the photochemistry of inorganic anions are discussed in the next section; those dealing with other compounds are considered ... -
Isolation, Structure, Chemistry and Photochemistry of cis?bis(2,2'-bipyridyl)carbonylchlororuthenium(II) perchlorate
(1980)The molecular structure and chemical and photochemical reactions of [Ru(bpy)2(CO)Cl]+ClO4?, which has been isolated from the reaction of ruthenium trichloride and 2,2?-bipyridyl(bpy) in dimethylformamide, are described. -
C.I.D.N.P. enhancement of both organometallic and organic compounds in the thermal reaction of [Ti(CH2Ph)Cl(c-C5H 5)2] with CCl4
(1982)The thermal reaction of [Ti(CH,Ph)CI(q-C5H5)2] with CCI4 in r2HSb] enzene solution gives enhanced signals for both the starting titanium compound and product PhCH2CCI3, but not in titanocene dichloride or bibenzyl which ... -
Synthesis, properties, and X-ray crystal and molecular structures of homoleptic alkenyls of tin and chromium
(1983)Reaction of Li(CPh[double bond, length half m-dash]CMe2) with SnCl4 or CrCl3?3thf (thf = tetrahydrofuran) affords the isoleptic compounds Sn(CPh[double bond, length half m-dash]CMe2)4 or [Cr(CPh[double bond, length half ... -
For debate... medical research output 1973-81: a romp around the United Kingdom research centres
(1984)In order to measure output of medical research in the United Kingdom, the computerised database of Excerpta Medica was used to count the number of publications emanating from each centre of research based on a medical ... -
Chronic granulomatous disease presenting as an oculomucocutaneous syndrome mimicking Behcet's syndrome
(BMJ, 1986)A female patient who presented for the first time at the age of 19 with oculomucocutaneous syndrome was found to have an absolute deficiency of neutrophil peroxide production. Neutrophil peroxide production as measured by ... -
Observation of optical Stark effect in InGaAs/InP multiple quantum wells
(American Institute of Physcis, 1987)We report an experimental observation of a blue shift in the n=1 heavy-hole exciton line of In0.53Ga0.47As/InP multiple quantum wells resulting from a picosecond photoexcitation in the transparent spectral region. The ... -
Exciton line broadening in CdxZn1?xTe/ZnTe multiple quantum wells
(American Institute of Physics, 1988)We have investigated Cdx Zn1?xTe/ZnTe multiple quantum wells using absorption techniques. We have observed sharp excitonic features at low temperatures which strongly broaden at room temperature. The strength of the ... -
Priorities in process algebras.
(IEEE Computer Society, 1988)An operational semantics for an algebraic theory of concurrency is developed that incorporates a notion of priority into the definition of the execution of actions. An equivalence based on strong observational equivalences ... -
Defective suppression in the autologous mixed lymphocyte reaction in patients with Crohn's disease
(BMJ, 1989)T helper and suppressor cell control of autologous immunoglobulin production was measured in 14 patients with Crohn's disease (CD) using autologous B cells or monocytes to stimulate regulatory T-cell activity. A pronounced ... -
Frequency locking and quasiperiodicity in a modulated external cavity injection laser
(American Institute of Physics, 1989)We report the observation of frequency locking and quasiperiodicity in a modulated external cavity injection laser. The order of appearance of the frequency-locked regions follows a Farey sequence as the modulation frequency ... -
Towards action-refinement in process algebras.
(IEEE Computer Society Press., 1989)A simple process algebra which supports a form of refinement of an action by a process is presented and the question of an appropriate equivalence relation for it is addressed. The main result is that an adequate equivalence ... -
All optical, high contrast absorptive modulation in an asymmetric Fabry-Perot etalon
(American Institute of Physics, 1991)We report a 27:l switching contrast ratio with 2.5 mW of power in an asymmetric Fabry- Perot Ctalon. The modulation is achieved by optical saturation of the excitonic absorption profile of a 95 A GaAs/AlGaAs multiple ... -
Room-temperature exciton luminescence in II-VI quantum wells
(1991)We observe free excitons in absorption and emission at room temperature in Cd0,2sZne.7sTe/ ZnTe multiple quantum wells. A large overlap between luminescence and absorption peaks observed at 10 K is maintained up to room ... -
Hot-exciton relaxation in CdxZn1-xTe/ZnTe multiple quantum wells
(1991)We have observed the creation of hot excitons at high momentum in CdxZn1-xTe multiple quantum wells and subsequent relaxation by LO-phonon emission to give sharp luminescence lines superimposed on a broader background. The ... -
Personalised ADPCM play-back devices for the handicapped
(1991)Two personalised instantaneous speech playback devices were designed and developed Both centred upon the memory efficiency advantages of Adaptive Differential Pulse Coded Modulation (ADPCM). One system is handheld and ... -
Optical measurement of ion implantation damage depth in multiple-quantum-well mesa structures
(1991)We have determined the depth of ion implant damage in semiconductor materials by nonlinear optical measurements. The carrier lifetime in ion-implanted mesas was measured by the pump-probe technique, and the carrier ... -
Bistable self-electro-optic operation of strained In0.1Ga0.9As/GaAs asymmetric Fabry Perot modulators
(1991)We report bistable operation of a strained-layer InGaAs/GaAs asymmetric Fabry-Perot optical modulator configured as a self-electro-optic effect device (SEED) operating in reflection mode. Bistable loops are observed from ... -
A digital signal processing index of hand tremor
(1992)An index of hand tremor is formulated from the data obtained from the analysis of the cylindrical grip strength. The tremor signal is extracted digitally from the data and the mean square power calculated. The ...
