Anxiety sensitivity and PTSD symptom severity are reciprocally related: Evidence from a longitudinal study of physical trauma survivors.

Cross-lagged panel analysis of interview data collected from survivors of traumatic physical injury (N = 677) was used to examine the temporal relationship between anxiety sensitivity and posttraumatic stress disorder (PTSD) symptom severity. The 2 constructs were assessed at 3 time points: within days of physical injury, at 6-month follow-up, and at 12-month follow-up. Results indicated that anxiety sensitivity and PTSD symptom severity were reciprocally related such that anxiety sensitivity predicted subsequent PTSD symptom severity, and symptom severity predicted later anxiety sensitivity. Findings have both theoretical and clinical implications. (PsycINFO Database Record (c) 2010 APA, all rights reserved)     

A pilot study of affect-focused psychotherapy for antepartum depression.

Logically, psychotherapy should be the first-line treatment for depression during pregnancy, yet there have been very few nondrug interventions tested in this patient population. The present study examines the impact of affect-focused psychotherapy as a treatment for antepartum depression. The treatment model was thought to be feasible to test with this population because depressed pregnant women are in need of an integrative model that can engage the client quickly and work rapidly to reduce symptom distress. Participants were 10 pregnant women with major depressive disorder who were treated with five sessions of affect-focused psychotherapy, as outlined in a published treatment manual. All therapy sessions were videotaped. Results indicate that participants experienced significant improvements in depressive symptoms, as well as increased therapeutic alliance and patient-therapist bond. These preliminary results provide promising data that demonstrate the effectiveness of a short-term (five-session) affect-focused psychotherapeutic treatment with a patient population suffering from antepartum depression. (PsycINFO Database Record (c) 2010 APA, all rights reserved)     

Improved Decentralized Method for Control of Building Structures under Seismic Excitation

A decentralized control method with improved robustness and design flexibility is proposed for reducing vibrations of seismically excited building structures. In a previous study, a control scheme was developed for multistory building models using nonlinear, decentralized control theory. This control method has now been improved in this study in that less information about material properties and geometrical parameters of the building is needed and the selection of control design parameters is more flexible. The nonlinear behavior of the proposed control system is studied and its stability property is proven mathematically. To evaluate the effectiveness and robustness of the proposed method, three illustrative structural models, i.e., an eight-story elastic shear beam model, a two-story nonlinear elastic shear beam model, and a 20-story elastic benchmark model are studied. The 1940 El Centro and the 1995 Kobe earthquakes are used in these examples. The performance of the current control design, as applied to these examples, has shown to be more effective in reducing structural responses and improving robustness.     

Social influence on group moral decisions: The interactive effects of moral reasoning and sex role orientation.

In this study, we examined the effects of moral reasoning level and sex role orientation on social influence in group decision making. We predicted that these two individual difference constructs would have an interactive effect such that people who are compatible or nonconflicted on the two dimensions would have more influence on a group task with moral implications than would people who are conflicted. All subjects individually completed a distributive decision task that required ranking terminally ill patients for access to a life-saving kidney machine. They then met in small groups and reached a group decision on the same task. The subjects' moral reasoning level and sex role orientation—assessed via the Rest Defining Issues Test (Rest, 1979) and the Bem Sex Role Inventory (Bem, 1974), respectively—were used to predict influence on the group decision. Influence was measured in three ways: similarity between individual and group ranks, self-rated influence, and selection of the most influential group member. The results of all three influence measures provided support for the interactive hypothesis. In the discussion we consider the implications of the data for individual difference models of moral reasoning, the need for further understanding of goal competition and personality conflict, and the importance of considering the impact of moral factors on group decision-making processes. (PsycINFO Database Record (c) 2010 APA, all rights reserved)     

The effect of casein,urea and dried poultry waste on the fermentation of starch or cellulose measured in vitro

Comparative studies on the effects of casein, urea and poultry waste on the fermentation of starch and cellulose were conducted. Incubation of starch with poultry waste for 390 min resulted in greater overall gas, total VFA and ammonia production than in control incubations (grass cubes and hay). Between 210 and 390 min the ammonia concentration fell, indicating microbial utilisation of nitrogen. Replacement of poultry waste with casein resulted in lower gas and total VFA production and similar ammonia concentrations in comparison with the control incubation. When starch was incubated with urea, the ammonia concentration rose rapidly, causing an elevated pH and poor VFA production. When cellulose was incubated with any of the three nitrogen sources, gas and total VFA production were considerably lower than in control incubations. Inclusion of urea as a nitrogen source had an effect on cellulose fermentation similar to that seen with starch. When grass cubes and hay were incubated with poultry waste, gas production was similar to that of the control; however, ammonia and total VFA production were greater than in the control. The results indicate that the carbohydrate content of poultry waste may be useful in promoting the establishment of fermentation, and that the slow release of ammonia may facilitate a more efficient fermentation of roughage in nutrients such as grass and hay.     

Effects of selective excitotoxic lesions of the nucleus accumbens core, anterior cingulate cortex, and central nucleus of the amygdala on autoshaping performance in rats.

The nucleus accumbens core (AcbC), anterior cingulate cortex (ACC), and central nucleus of the amygdala (CeA) are required for normal acquisition of tasks based on stimulus-reward associations. However, it is not known whether they are involved purely in the learning process or are required for behavioral expression of a learned response. Rats were trained preoperatively on a Pavlovian autoshaping task in which pairing a visual conditioned stimulus (CS+) with food causes subjects to approach the CS+ while not approaching an impaired stimulus (CS-). Subjects then received lesions of the AcbC, ACC, or CeA before being retested. AcbC lesions severely impaired performance; lesioned subjects approached the CS + significantly less often than controls, failing to discriminate between the CS + and CS-. ACC lesions also impaired performance but did not abolish discrimination entirely. CeA lesions had no effect on performance. Thus, the CeA is required for learning, but not expression, of a conditioned approach response, implying that it makes a specific contribution to the learning of stimulus-reward associations. (PsycINFO Database Record (c) 2010 APA, all rights reserved)     

Synthesis of block copolymers based on oxyethylene chains and their use as polymer electrolytes

High-molecular-weight copolymers were prepared consisting predominantly of oxyethylene and oxymethylene-oligo(oxyethylene) blocks with a small 1-phenylethylene block. Ionic conductivities of mixtures of the copolymers with CF₃SO₃Li were measured.     

Rates of Trace Mineral-Catalyzed Decomposition of Hydrogen Peroxide

Rapid hydrogen peroxide (H2O2) decomposition is a significant limitation of catalyzed H2O2 propagations (i.e., modified Fenton’s reagent) for the remediation of contaminated soil and groundwater by in situ chemical oxidation. Rates of H2O2 decomposition mediated by seven trace minerals and four iron and manganese oxides were evaluated in batch reactors containing slurries of H2O2 and each of 11 minerals. At pH 3, the dominant catalysts in the decomposition of H2O2 on a per surface area basis were the manganese and iron oxides pyrolusite, goethite, and hematite, while decomposition rates in the presence of the manganese oxyhydroxide manganite and the trace mineral siderite were one to two orders of magnitude lower. At pH 7, the dominant catalysts were hematite and pyrolusite, and decomposition rates were one to two orders of magnitude lower in the presence of goethite, manganite, and siderite. The trace minerals anatase, bauxite, cuprite, ilmenite, magnesite, and willemite provided the least activity for decomposing H2O2 at both pH regimes. The results of this study document that the trace minerals anatase, bauxite, cuprite, ilmenite, magnesite, siderite, and willemite do not provide a significant pathway for H2O2 decomposition in the subsurface, and efforts to stabilize H2O2 for ISCO should focus on reactions occurring on the surfaces of iron and manganese oxides.