Rheology of aqueous BeO suspension with NH4PAA as a dispersant

AbstractThe effects of dispersant amount and solids loading on rheological behaviors of aqueous BeO suspensions were investigated. The relationship of viscosity and solids loading determined experimentally was compared with five various existing models. BeO aqueous suspensions exhibited a shear dependent behavior from shear thinning to shear thickening with the increasing of shear rate. The rheological behaviors of the suspensions are in reasonable accord with the model proposed by Liu, and are basically consistent with the Dabak model and Chong model, but are discrepant to other two models proposed by Krieger–Dougherty and Kitano. The maximum solids loading is estimated to be 0.577

Immediate/chronic death threat: The different effects on money desire

The present study examined the distinct relationships between immediate/chronic death threat and money attitude in the real-world context. Immediate threats led to a stronger desire for money, whereas chronic threats had not such an effect.</p

A brief review of applied psychology in China

Psychology in China has a long past, but a rather short history. Modern psychology was introduced to China in the early 20th century soon, psychology as a scientific discipline was established when the teaching, research, and academic exchanges began. Specifically, applied psychology was established until the last decade of the 20th century; however, the past 30 years have witnessed the fast growth of applied psychology in China. In this article, we briefly introduce the history of psychology in China, its establishment as a discipline and a profession, and present some applications of psychology in the domains of public mental health as well as in educational and organizational settings

Production and Properties of a Spray Formed 70%Si-Al Alloy for Electronic Packaging Applications

The high silicon content Si-Al alloy is a typical heat dissipation material that used in the electrical packaging field. A spray forming process is used to produce a 70%Si-Al alloy specimen as a heat dissipation material with a diameter of 76.2 mm (3 inch) and a thickness of 6 mm. Then the spray formed Si-Al alloy specimens are hot pressed at 570 C with different pressure ranged from 200 MPa to 700 MPa to increase their density. The physical properties of the experimental alloy specimen are measured. And the microstructures are observed by using optical microscopy and scanning electronic microscopy. The results show that Spray forming is suitable to produce a 70%Si-Al alloy. The size of primary Si phase in the spray formed 70%Si-Al alloy is refined only 20$30 mm. The relative density of 70%Si-Al alloy after spray forming is about 90%. With a following hot pressure of 700 MPa, the relative density value can obtain 98%. The typical physical properties such as the thermal conductivity, coefficient of thermal expansion and electrical conductivity of spray formed 70%Si-Al alloy are acceptable as a heat dissipation material for many electronic packaging applications

TPH2 genotype is associated with PTSD's avoidance symptoms in Chinese female earthquake survivors

Genetic factors are important in the development of post-traumatic stress disorder (PTSD) following exposure to traumatic events. However, the molecular genetic underpinnings of this disorder have not been definitive. This study examined the association between tryptophan hydroxylase 2 (TPH2) rs11178997 genotype, a single-nucleotide polymorphism (SNP) located in the transcriptional control region, and PTSD symptoms. A total of 326 Chinese adults who suffered from the deadly 2008 Wenchuan earthquake and lost their children during the disaster participated in this study. PTSD symptoms were measured with PTSD checklist, and the SNP was successfully genotyped by the MassARRAY system. The results indicated that, although the rs11178997 genotype was not associated with total PTSD symptoms, it could significantly predict severity of PTSD&#39;s avoidance symptoms in women. These findings support that TPH2 may play an important functional role in the development of PTSD and contribute to the limited literature regarding the genetic basis and the sex-specific expression of PTSD&#39;s symptoms

Oxytocin is associated with PTSD's anxious arousal symptoms in Chinese male earthquake survivors

Background: Posttraumatic stress disorder (PTSD) is a complex and severe mental disorder triggered by exposure to an extraordinarily traumatic event. Human and animal studies have implied the functional role of the oxytocin system in the development of PTSD (Cochran, Fallon, Hill, & Frazier, 2013; Koch et al., 2014; Olff, 2012). Specification of the role of the oxytocin system in the emergence and progression of PTSD symptomatology would provide evidence to inform both theory and clinical practice. Methods: This study examined the association between oxytocin serum levels and PTSD symptoms. A total of 106 Chinese male adults who suffered from the deadly 2008 Wenchuan earthquake participated in this study. PTSD symptoms were measured with PTSD Checklist for DSM-5 (PCL-5), and serum oxytocin level was determined with ELISA oxytocin kits. Results: The mean score on the PCL-5 was 19.30 (SD=14.50, range: 1–65) in this sample. The mean oxytocin level was 101.59 pg/ml (SD=55.89, range: 31.50–286.71). The results indicated that although the oxytocin was not associated with total PTSD symptoms, it was associated with PTSD's anxious arousal symptoms. Conclusion: These findings support that the oxytocin may play an important functional role in the development of PTSD and contribute to the extant knowledge on the genetic basis of the PTSD symptoms

Effect of solidification rate on the coarsening behavior of precipitate in rapidly solidified Al-Si alloy

The gas-atomized Al-Si alloy powder with different particle sizes was subjected to isothermal annealing for understanding the effect of solidification rate on precipitation and growth Si crystals. The results show that Si precipitates grew more quickly in the small samples with a large solidification rate due to high interfacial energy. Moreover, these Si crystals had a tendency to form a quasi-spherical shape after annealing at a low temperature or for a short holding time. Coarsening of the Si precipitates during annealing was examined using a LSW equation. Thermal stability of the rapidly solidified alloy was significantly influenced by its original microstructure as a result of high solidification rate. Furthermore, more serious clustering of Si-Si phase was also observed in the small samples, attributed to the rapid coarsening of the Si phases

Latent structure of posttraumatic stress disorder symptoms in an adolescent sample one month after an earthquake

Increasing empirical studies suggest that the tripartite posttraumatic stress disorder (PTSD) model described in the DSM-IV does not accurately account for the underlying PTSD factor structure, and several alternative models have been proposed. The present study investigated a newly refined, five-factor model of PTSD symptoms in a sample of Chinese adolescent survivors of an earthquake. A total of 1198 middle school students (653 females, 526 males) with a mean age of 14.4 years (SD = 1.1, range: 11-18) participated in this study one month after an earthquake. The novel five-factor model comprised of intrusion, avoidance, numbing, dysphoric arousal, and anxious arousal demonstrated significantly better fit than two alternative four-factor models. Further analyses revealed differentiable relations between the PTSD factors and external measures of anxiety and depression. These findings provide empirical support for the robustness of five-factor model, and carry implications for further reorganization of PTSD criteria. (C) 2013 The Foundation for Professionals in Services for Adolescents. Published by Elsevier Ltd. All rights reserved