Publications by authors named "Keith Armstrong"

The palladium complex [()Pd(μ-OAc)][OTf] ( = neocuproine) is a selective catalyst for the aerobic oxidation of vicinal polyols to α-hydroxyketones, but competitive oxidation of the ligand methyl groups limits the turnover number and necessitates high Pd loadings. Replacement of the neocuproine ligand with 2,2'-biquinoline ligands was investigated as a strategy to improve catalyst performance and explore the relationship between ligand structure and reactivity. Evaluation of [()Pd(μ-OAc)][OTf] ( = 2,2'-biquinoline) as a catalyst for aerobic alcohol oxidation revealed a threefold enhancement in turnover number relative to the neocuproine congener, but a much slower rate.

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The present study examined family-wide versus individual perceptions of, and changes in, family connectedness in response to a one-time reflecting team (RT) intervention. Seventy-six families (N = 208 individuals), recruited during family therapy, completed family connectedness measures before and after the RT intervention. A subset of adults (n = 26) completed 1-week follow-up measures.

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The synthesis, structural characterization, and electrochemical behavior of the neutral Mn(azpy)(CO)(Br) 4 (azpy = 2-phenylazopyridine) complex is reported and compared with its structural analogue Mn(bipy)(CO)(Br) 1 (bipy = 2,2'-bipyridine). 4 exhibits reversible two-electron reduction at a mild potential (-0.93 V vs Fc in acetonitrile) in contrast to 1, which exhibits two sequential one-electron reductions at -1.

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Frontal fibrosing alopecia (FFA) is a recently described inflammatory and scarring type of hair loss affecting almost exclusively women. Despite a dramatic recent increase in incidence the aetiopathogenesis of FFA remains unknown. We undertake genome-wide association studies in females from a UK cohort, comprising 844 cases and 3,760 controls, a Spanish cohort of 172 cases and 385 controls, and perform statistical meta-analysis.

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Reflecting Teams (RTs) are an internationally recognized clinical consultation methodology, first developed by Tom Andersen in 1985. Over the last three decades, family therapists around the world have used RTs to enhance treatment. However, this innovation to family therapy practice is not well-standardized nor evaluated.

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Objective: This investigation aimed to better understand perceived barriers to academic success and preferences for a veteran-specific psychosocial course among veterans with symptoms of posttraumatic stress (PTS).

Method: Ninety-three veterans participated in this investigation as part of a larger study examining psychosocial functioning among veterans with PTS symptoms. Participants completed a self-report survey focused on perceived barriers to academic success and psychoeducational preferences related to health and well-being.

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The first synthesis of anion capped cerium corrole complexes is reported. Unusual clustering of the lanthanide corrole units has been found and the degree of aggregation can be controlled by the choice of the capping ligand. A polymeric structure 1a, with the general formula [Cor-Ce(THF)-Cp-Na] (Cor = 5,15-bis(2,4,6-trimethylphenyl)-10-(4 methoxyphenyl)-corrole, THF = tetrahydrofuran), is formed using sodium cyclopentadienide (NaCp) and a dimeric structure 2a, with the general formula [Cor-Ce-Tp], is formed when potassium tris(pyrazolyl)borate (KTp) is used.

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We describe, for the first time, the microbial characterisation of hydrogel-forming polymeric microneedle arrays and the potential for passage of microorganisms into skin following microneedle penetration. Uniquely, we also present insights into the storage stability of these hydroscopic formulations, from physical and microbiological viewpoints, and examine clinical performance and safety in human volunteers. Experiments employing excised porcine skin and radiolabelled microorganisms showed that microorganisms can penetrate skin beyond the stratum corneum following microneedle puncture.

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For a variety of infectious diseases, the richness of the community of potential host species has emerged as an important factor in pathogen transmission, whereby a higher richness of host species is associated with a lowered disease risk. The proposed mechanism driving this pattern is an increased likelihood in species-rich communities that infectious individuals will encounter dead-end hosts. Mosquito-borne pathogen systems potentially are exceptions to such "dilution effects" because mosquitoes vary their rates of use of vertebrate host species as bloodmeal sources relative to host availabilities.

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Eastern Equine Encephalitis virus (EEEV; family Togaviridae, genus Alphavirus) a highly pathogenic mosquito-borne virus is endemic to eastern North America. The ecology of EEEV in Florida differs from that in other parts of the United States; EEEV in the northeastern United States is historically associated with freshwater wetlands. No formal test of habitat associations of EEEV in Florida has been reported.

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This study reports on a preliminary uncontrolled study of a treatment for couples in which one partner is diagnosed with a terminal illness. In this study nine couples, in which one partner was diagnosed with a terminal illness and had less than 18 months to live, were offered eight sessions of couples therapy. Follow-up data were available for six couples.

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