77,846 research outputs found
Muon spin relaxation study of phosphosilicate gels
No full textMuon dynamics in phosphosilicate proton conductors P2O5-SiO2 with a composition 30 mol% phosphorus oxide (30P) have been studied as a function of temperature using muon spin relaxation. For materials heat treated at 300 °C the muons implant at sites close to P-OH groups associated with water molecules. While in 1000 °C heat treated samples the muons are trapped at sites involving a bridging oxygen P-O-Si. Averaging of the local nuclear dipolar field by dynamics of the adsorbed water is observed above ca 180 K for the muon sites in the 300 °C heat treated sample. There is some evidence for further muon dynamics in this material above 250 K perhaps caused by muon diffusion
Cottrell, Edward A.-Residence P.1
No full textHome of Edward A. Cottrell, 1912, Farmington. Courtesy: John S. White
Studies in the physical chemistry of detonation and related topics
No full textThe well-established physical theory of detonation specifies
the properties of the infinite plane detonation wave in terms of
the thermochemistry of the detonation reaction and the equation
of state of the detonation products, (see, for example, Taylor,
1952). Thus physical chemistry has two roles in the discussion
of the plane detonation wave, the provision of thermochemical
information and the determination of the equation of state.
This theory deals however with an ideal case, in which rate
processes have no effect; in the real wave, complicated rate
processes have to be taken into account. Here again physical
chemistry has information to supply in the fields of chemical
kinetics and rates of energy transfer. The present thesis deals
with contributions to physical chemistry in the fields of thermochemistry, equation of state and intermolecular forces, chemical
kinetics and energy transfer.LIST OF PAPERS:
(1) The preparation and heats of combustion of some amine
nitrates
T. L. Cottrell and J. E. Gill,
J. Chem. Soc., 1951, 1798.
|| (2) Binding energies in hydrocarbons
|| (3) Resonance energies from thermal data
T. L. Cottrell and L. E. Sutton,
J. Chem. Physics, 1947, 15, 685 (Letter)
|| (4) Covalency, electrovalency and electronegativity,
T. L. Cottrell and L. E. Sutton,
Proc. Roy. Soc. A, 1951, 207, 49
|| (5)The interpretation of bond properties,
T. L. Cottrell and L. E. Sutton,
Quart. Rev. Chem. Soc., 1948, 2, 260
|| (6) The strengths of chemical bonds
T. L. Cottrell,
Butterworths, London, 1954, 310 + viii pp. (Book)
|| (7) Repulsive intermolecular forces,
T. L. Cottrell,
Discussion of the Faraday Society, 1956, 22, 10
|| (8) Electronic kinetic energy in gases at high pressures,
T. L. Cottrell,
J. Chem. Physics , 1950, 18, 1117 (Letter)
|| (9)
Molecular energy at high pressure,
T. L. Cottrell,
Trans. Faraday Soc., 1951, 47, 337
|| (10) The virial theorem in quantum mechanics,
T. L. Cottrell and S. Paterson,
Phil. Mag. 1951, (7), t,2, 391
|| (11) Approximate wave -functions satisfying the virial theorem,
T. L. Cottrell and S. Paterson,
Trans. Faraday Soc., 1951, 47, 233
|| (12) An equation of state applicable to gases at densities near that of the solid and temperatures far above the critical,
T. L. Cottrell and S. Paterson,
Proc. Roy. Soc. A, 1952, 213, 214
|| (13) The second virial coefficient of gases and mixtures. Part 1 - Carbon dioxide + helium mixtures
T. L. Cottrell and R. A. Hamilton,
Trans. Faraday Soc., 1956, 52, 156
|| (14) The second virial coefficient of gases and mixtures. Part 2 - Mixtures of carbon dioxide with nitrogen, oxîgen,carbon
monoxide, argon and hydrogen
T. L. Cottrell, R. A Hamilton and R. P. Taubinger,
Trans. Faraday 8( 4., 1956, 52, 1310
|| (15) The thermal decomposition of nitromethane,
T. L. Cottrell, T. E. Graham and T. J. Reid,
Trans. Faraday Soc., 1951, 47, 584.
|| (16) The thermal decomposition of nitroethane and 1- nitropropane
T. L. Cottrell, T. E. Graham and T. J. Reid,
Trans. Faraday Soc., 1951, 47, 1089
|| (17) The kinetics of the oxidation of ethylene by nitrogen dioxide
T. L. Cottrell and T. 8. Graham,
J. Chem. Soc., 1953, 556
|| (18) The kinetics of the oxidation of propylene by nitrogen dioxide
T. L. Cottrell and T.: S. Graham,
J. Chem. Soc., 1954, 3644 (Note)
|| (19) Importance of gas spaces in the propagation of detonation
of granular explosives
T. L. Cottrell, J. G. Gibb,
Nature, 1956, 178, 814
|| (20) Transition probability in molecular encounters. Part 1 - The evaluation of perturbation integrals
T. L. Cottrell and N. Ream,
Trans. Faraday Soc., 1955, 51, 159
|| (21) Transition probability in molecular encounters. Part 2 -
Vibrational relaxation time in methane,
T. L. Cottrell and N. Ream,
Trans. Faraday Soc., 1955, 51, 1153
|| (22) Transition probability in molecular encounters. Part 3 - Experimental values for relaxation time in methane
T. L. Cottrell and (Mss) P. F. 'Martin,
Trans. Faraday Soc., 1957, 53, 11s
Family factors associated with adolescent self-harm: a narrative review
No full textThis narrative literature review focuses on family factors that might be amenable to intervention using family therapy (n=126). Domains of interest include parent/child interactions, inter-parental relationships, child characteristics, parental characteristics, wider system factors, treatment needs and moderators. The focus of family-orientated treatment with this population should focus on maximizing cohesion, attachment, adaptability, family support, parental warmth while reducing maltreatment, scapegoating and moderating parental control. Close working relationships with child protection services and schools represent additional opportunities. Practitioner points •Over and above any inherited risk, a range of family interactional factors are strongly associated with self-harming behaviours in young people •Therapy has the potential to make a positive difference by focusing on enhancing family cohesion and adaptability, whilst reducing discord and violence. Discussions that enhance perceived parental support and warmth may be particularly helpful •Therapists should attend to issues of perceived difference and potential victimization (bullying, gender orientation and identity, ethnic minority status) as these may play an important role in self-har
The intersection of modernity, globalization, indigeneity, and postcolonialism: Theorizing contemporary Saskatchewan schools
No full textViewing education as a contested site in the intersection of modernity, indigeneity, globalization, and postcolonialism, we explore relations between Aboriginal peoples and public schools in the province of Saskatchewan, Canada. Posing a profound challenge to provincial policy underpinned by global educational culture, indigeneity constitutes a manifestation of localism and diversity and is one of the main dynamics mediating the homogenizing forces of globalization in Saskatchewan's schools. Saskatchewan educational policy is a manifestation of hybridity, typical of the globalization process and integral to a wider postcolonial reconciliation project designed to serve a legitimating function for Canada and Saskatchewan. This hybrid education policy is buttressing indigeneity's demand for recognition and is facilitating the subaltern claim to represent, in cultural and epistemological terms, an alternative to globalized modernity. These local developments have global relevance because Saskatchewan's educational landscape parallels international jurisdictions with similar Indigenous histories, demographic imperatives, educational challenges, and postcolonial prospects. ABSTRACT FROM PUBLISHER]; Copyright of Diaspora, Indigenous & Minority Education is the property of Routledge and its content may not be copied or emailed to multiple sites or posted to a listserv without the copyright holder's express written permission. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.
ISIS muons for materials and molecular science studies
No full textThis article marks the first 25 years of muon production at ISIS and the creation in that time of a facility dedicated to the use of these elementary particles as unique microscopic probes in condensed matter and molecular science. It introduces the basic techniques of muon spin rotation, relaxation and resonance, collectively known as μSR, that were already in use by specialist groups at other accelerator labs by the mid-1980s. It describes how these techniques have been implemented and made available at ISIS, beginning in 1987, and how they have evolved and improved since then. Ever widening applications are illustrated with highlights from magnetism, superconductivity, interstitial diffusion and charge transport, semiconductors and dielectrics, chemical physics and radical chemistry. Over these first 25 years, a fully supported User Facility has been established, open to all academic or industrial users. It presently comprises 4 scheduled instruments, optimised for different types of measurement, together with auxiliary equipment for radiofrequency or microwave spin manipulation and future plans for pump-probe laser excitation
Portrait of Amy Mack (Mrs Lancelot Harrison) [picture] /
No full textTitle from inscription on reverse.; Condition: Fair, glued to card.; Inscriptions: "Amy Mack (Mrs. Lancelot Harrison) author of 'A bush calendar', 'Bush days', etc. photo. J. S. P. Ramsay" --In ink on reverse
PHENOTYPIC-EXPRESSION IN FAMILIAL ADENOMATOUS POLYPOSIS - PARTIAL PREDICTION BY MUTATION ANALYSIS
No full textThe phenotypic expression in familial adenomatous polyposis (FAP) is variable. This study compares the phenotype of 27 patients with an identical 5 base pair (bp) deletion at codon 1309 with a group of 61 matched patients with FAP where knowledge of specific mutations is not available and with seven other different mutations in 24 subjects. Patients with the codon 1309 deletion have significantly more colorectal polyps at the time of colectomy than age and sex matched FAP controls (p = 0.0001). The median number of polyps in colectomy specimens of patients with the deletion at condon 1309 was 4000 (interquartile (IQ) range 3000-4875), compared with 600 (IQ range 488-1400) in the matched controls. Mutations at codon 1323, 1407, and 233 were also associated with large numbers of polyps. Desmoid disease and extracolonic cancers were more common with the mutation at codon 1309 (p = 0.003). In conclusion, there may be a correlation between a specific germline mutation and the number of large bowel polyps. There is residual heterogeneity in phenotypic expression, however, and this may result from the influence of other genes, specific environmental factors or chance.</p
Profiling of Soluble Neutral Oligosaccharides from Treated Biomass using Solid Phase Extraction and Liquid Chromatography-Multiplexed Collision Induced Dissociation-Mass Spectrometry
No full textThermochemical pretreatment of cellulosic biomass improves cell wall enzymatic digestibility, while simultaneously releasing substantial amounts of soluble oligosaccharides. Profiling of oligosaccharides released during pretreatment yield information essential for choosing glycosyl hydrolases necessary for cost-effective conversion of cellulosic biomass to desired biofuel/biochemical end-products. In this report we present a methodology for profiling of soluble neutral oligosaccharides released from ammonia fiber expansion (AFEXTM)-pretreated corn stover. Our methodology employs solid phase extraction (SPE) enrichment of oligosaccharides based on porous graphitized carbon (PGC), followed by high performance liquid chromatography (HPLC) separation using a polymeric amine based column (Prevail Carbohydrate ES) and electrospray ionization time-of-flight mass spectrometry (ESI-TOF-MS) in both positive and negative modes. For structural elucidation on the chromatographic time scale, nonselective multiplexed collision-induced dissociation was performed for quasi-simultaneous acquisition of accurate molecular and fragment masses of neutral oligosaccharids in a single analysis. These analyses directly revealed presence of glucans up to degree of polymerization (DP) 22 without side-chain modifications. Additionally, arabinoxylans with DP up to 6 were detected in the pretreated biomass samples (post-enzymatic digestion). All linkages between sugar units in glucans and arabinoxylans were identified to be p-1-4 linkages based on cross-ring fragment masses. Comprehensive profiling of soluble oligosaccharides also demonstrated that arabinoxylan acetylation was reduced by greater than 85% post-AFEXTM treatment.Published version: Vismeh, Ramin, Humpula, James F., Chundawat, Shishir P. S., Balan, Venkatesh, Dale, Bruce E. & Jones, A. Daniel. (2013). Profiling of Soluble Neutral Oligosaccharides from Treated Biomass using Solid Phase Extraction and LC-TOF MS. Carbohydrate Polymers 94(2), 791-799. http://dx.doi.org/10.1016/j.carbpol.2013.02.00
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