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排序方式: 共有451条查询结果,搜索用时 78 毫秒
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Young Richard A.; Marshall Sheila K.; Domene José F.; Graham Matthew; Logan Corinne; Zaidman-Zait Anat; Mart Amy; Lee Celine M. 《Canadian Metallurgical Quarterly》2008,55(3):297
This study determined how youth (ages 17-21) and their parents jointly constructed and acted on goals and strategies pertinent to the transition to adulthood. Twenty parent-youth dyads were followed over an 8-month period using the qualitative action-project method. Data included their joint conversations, video recall of internal processes, self-monitoring logs, and researcher telephone monitoring. Detailed and repeated analysis of elements, functional steps, and goals resulted in the identification of an explicit joint project for each dyad that the participants saw as pertinent to the transition to adulthood. These projects referred broadly to the youth development of identity and social inclusion in the adult world and included the specific projects of career promotion, governance transfer, and parent-youth relational processes. The findings illustrate the complexity of the transition-to-adulthood process as well as its joint construction by parent and youth. Implications for practice include identifying and following the joint parent-youth transition project. (PsycINFO Database Record (c) 2010 APA, all rights reserved) 相似文献
33.
Lipids - The effect of total parenteral nutrition (TPN) with lipid emulsions containing ca. 48% 18∶2ω6 plus 8% 18∶3ω3 (Intralipid®) or 76% 18∶2ω6 plus 0.5%... 相似文献
34.
Zeolites such as SSZ-25 and SSZ-35 exhibit Constraint Indexes (CI) lower than expected. Two hypotheses for the origin of the lower CI values are that partial cages on the external surface of the zeolites significantly contribute to the overall conversions and that the large cages within the crystalline structures provide less steric hinderence at the active site than would be expected from the size of the pores. The effect of external surface activity is observed by comparing the as-synthesized materials to those passivated via dealumination with ammonium hexafluorosilicate. The external surface dealumination is verified by XPS and by the reduction in reactivity toward isopropanol dehydration observed from materials still containing their SDAs. The external surface of calcined zeolites is shown to have little influence on the CI value. Cage accessibility is investigated by comparisons of structures having larger cages to those that do not and by following the time dependent behavior of the CI values for these materials. The presence of large cages in the zeolites is shown to lower the CI values below those expected from the pore sizes, and the time dependence of the CI value can provide insight into the existence of these larger cage structures. 相似文献
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This study evaluates the cognitive model of anxiety by investigating treatment-related changes in automatic associations to evaluate schematic processing. Spider-phobic participants (n=31) and healthy controls (n=30) completed fear-based Implicit Association Tests (IATs), which are reaction-time measures that tap implicit associations without requiring conscious introspection. The specific tasks involved classifying pictures of snakes and spiders along with semantic categorizations (good vs. bad, afraid vs. unafraid, danger vs. safety, and disgusting vs. appealing). Phobic individuals were assessed before and after group-based exposure treatment and 2 months later; controls were assessed at matched time points. Results supported clinical applications for implicit fear associations, including prediction of phobic avoidance, and treatment sensitivity of the fear- and disgust-specific automatic associations. (PsycINFO Database Record (c) 2010 APA, all rights reserved) 相似文献
38.
Recent research by the Sexual Abuse and Disability Project at the University of Alberta included a survey of 119 sexual abuse (SA) victims with developmental disabilities (DDs). Their responses indicated that SA treatment services for people with DDs are typically inaccessible, unavailable, and inappropriate. Inadequate treatment services appear to be due to the paucity of qualified professionals in the area of SA and DDs coupled with the slow development of appropriate SA treatment approaches. The application of adapted therapy approaches for people with DDs and examples of adapted SA treatment for children and women abused as children are presented. SA treatment issues for the developmentally disabled are discussed for practitioners' considerations. (PsycINFO Database Record (c) 2010 APA, all rights reserved) 相似文献
39.
Salima Alem Ta-Ya Chu Shing C. Tse Salem Wakim Jianping Lu Raluca Movileanu Ye Tao Francis Bélanger Denis Désilets Serge Beaupré Mario Leclerc Sheila Rodman David Waller Russell Gaudiana 《Organic Electronics》2011,12(11):1788-1793
We investigated the effect of solvents on the morphology, charge transport and device performance of poly[N-9″-hepta-decanyl-2,7-carbazole-alt-5,5-(4′,7′-di-2-thienyl-2′,1′,3′-benzothiadiazole)] (PCDTBT) and [6,6]-phenyl C71-butyric acid methyl ester (PC70BM) based solar cells. To carry out this investigation, chloroform and 1,2-dichlorobenzene were chosen as good solvents of the two compounds. Films prepared with chloroform exhibit larger domains than those prepared with 1,2-dichlorobenzene and their size increases with the amount of PC70BM. Fine tuning of the domain size was realized by using a solvent of mixed chloroform and 1,2-dichlorobenzene. At a mixing ratio of 50%:50%, a power conversion efficiency of 6.1% was achieved on PCDTBT:PC70BM (1:3) devices with an active area of 1 cm2, under air mass 1.5 global (AM 1.5 G) irradiation at 100 mW/cm2. 相似文献
40.
Iron oxide amended biosand filters for virus removal 总被引:1,自引:0,他引:1
Laboratory studies were performed to determine if the addition of iron oxides throughout biosand filter (BSF) media would increase virus removal due to adsorption. The proposed mechanism is electrostatic adsorption of negatively charged virion particles to positively charged iron oxides formed during the corrosion of zerovalent iron. Initial tests conducted using continuous flow, small-scale glass columns showed high MS2 bacteriophage removal in an iron-amended sand column (5log10) compared to a sand-only column (0.5log10) over 20 pore volumes. Additionally, two experiments with a column containing iron particles revealed 4log10 and 5log10 removal of rotavirus in the presence of 20 mg/L total organic carbon. Full-scale BSFs with iron particles removed >4log10 MS2 for the duration of the experiment (287 days), while BSF with steel wool removed >4log10 MS2 for the first 160 days. Plug flow for the BSF was shown to depend on uniformity between the iron oxide material and sand media grains. The results suggest that the duration of effective virus removal by iron-amended biosand filtration depends on source water conditions and the quantity and composition of iron material added. Overall, this study provides evidence that iron-amended BSFs may advance the field of point-of-use technologies and bring relief to millions of people suffering from waterborne diseases. 相似文献