Kaikki aineistot
Lisää
Abstract The preparation of a series of rhodium(I) complexes coordinated by various electronically tuneable Fischer carbene (FC) ligands, is reported. The Rh(I) metal complexes’ electronic properties could readily be modulated by variation of a p-N,N-dimethylaniline moiety with a ruthenocenyl substituent, or alternatively, substituting the carbene O-heteroatom for an amino-group. The electronic properties of the complexes were evaluated, and it was determined from the Tolman electronic parameters that the donor-ability of the FC ligands are comparable to N-heterocyclic carbenes. Furthermore, the facile control of the electronic properties of the complexes was demonstrated by mild oxidation of a ferrocenyl aminocarbene rhodium(I) complex, yielding the corresponding ferrocenium rhodium(I) complex cation. Finally, the complexes were evaluated as catalyst precursors for the hydroformylation of 1-octene.
Objective Interventions to increase physical activity (PA) in cancer survivors have often adopted a ‘one‐size‐fits‐all’ approach, and may benefit from being tailored to psychological constructs associated with behavior. The study objective was to investigate the exercise preferences and psychological constructs related to PA among cancer survivors. Methods Post‐treatment colorectal, endometrial, and breast cancer survivors (n=183) living in metropolitan and non‐metropolitan areas completed survey measures of PA, exercise preferences, attitudes, self‐efficacy, perceived behavioral control (PBC), and intention toward PA. Results A structural equation model with adequate fit and quality indices revealed that instrumental attitude and self‐efficacy were related to PA intention. Intention was related to behavior and mediated the relationship between self‐efficacy and behavior. Preferred exercise intensity was related to self‐efficacy, PBC, attitudes, and intention, while preferred exercise company was related to self‐efficacy and PBC. Participants preferred moderate‐intensity PA (71%), specifically self‐paced (52%) walking (65%) in an outdoor environment (58%). Conclusions Since instrumental attitude and self‐efficacy were associated with PA, incorporating persuasive communications targeting attitudes in PA interventions may promote PA participation. As cancer survivors who prefer low‐intensity exercise and exercising with others report lower self‐efficacy and PBC, interventions targeting confidence and successful experience in this group may also be warranted.
A round-robin study has been carried out to estimate the impact of the human element in small-angle scattering data analysis. Four corrected datasets were provided to participants ready for analysis. All datasets were measured on samples containing spherical scatterers, with two datasets in dilute dispersions and two from powders. Most of the 46 participants correctly identified the number of populations in the dilute dispersions, with half of the population mean entries within 1.5% and half of the population width entries within 40%. Due to the added complexity of the structure factor, far fewer people submitted answers on the powder datasets. For those that did, half of the entries for the means and widths were within 44 and 86%, respectively. This round-robin experiment highlights several causes for the discrepancies, for which solutions are proposed.