Nuclear forensic analysis of a non-traditional actinide sample.

Nuclear forensic publications, performance tests, and research and development efforts typically target the bulk global inventory of intentionally safeguarded materials, such as plutonium (Pu) and uranium (U). Other materials, such as neptunium (Np), pose a nuclear security risk as well. Trafficking leading to recovery of an interdicted Np sample is a realistic concern especially for materials originating in countries that reprocesses fuel. Using complementary forensic methods, potential signatures for an unknown Np oxide sample were investigated. Measurement results were assessed against published Np processes to present hypotheses as to the original intended use, method of production, and origin for this Np oxide.

Resident responses to Section 8 relocation outcomes: "If you're gonna move, you want to move up".

Economic hardship and the lack of social supports of households moving with Section 8 vouchers during mixed-income redevelopment is a concern to relocation counselors. Since residents are able to select their housing location they need to know the risks and benefits of various housing choices. Twenty-five residents facing the choice of remaining in a phased redevelopment, moving with a Section 8 voucher, or moving to another public housing development were interviewed in order to determine how to engage residents in evidence-informed decision making. Many residents want to move with Section 8 vouchers, but require supports to make the choice sustainable.

Supplementation of laying-hen feed with palm tocos and algae astaxanthin for egg yolk nutrient enrichment.

Adding supplements to hen feed can increase egg nutritional value. Astaxanthin, tocotrienols, and tocopherols are potent antioxidants that provide health benefits to humans. We hypothesized that the addition of these nutrients to hen feed would result in an increased nutrient content in egg yolk with minimum changes in functional properties. Laying hens (Hy-Line W-36 breed) were fed four diets with different supplementation levels of palm toco concentrate and algae biomass containing astaxanthin for 8 weeks. Egg yolks were analyzed for physical, chemical, and functional properties. The feed with the highest nutrient concentration was also studied for stability of these antioxidants using the Arrhenius approach. No significant differences were observed in functional properties except for emulsification capacity and sensory characteristics among eggs from different diet treatments. Changes in egg yolk color reached the maximum values at day 8. Incorporation of tocopherols and tocotrienols increased until day 8, astaxanthin incorporation increased until day 10, and all decreased thereafter. Feed nutrients resulted in a dose-response relationship of these compounds in the egg yolk. The transfer efficiency ranged from 0 to 9.9% for tocotrienols and tocopherols and from 7.6 to 14.9% for astaxanthin at their peak values. Results of the Arrhenius accelerated stability study showed significant differences in the shelf life of various nutrients, and these results can be used to properly formulate and store the feed materials.

Narrative and emotion integration in psychotherapy: investigating the relationship between autobiographical memory specificity and expressed emotional arousal in brief emotion-focused and client-centred treatments of depression.

Clinically depressed individuals have consistently been shown to demonstrate a bias for overgeneral autobiographical memory (ABM) disclosure, a strategy used to protect against the access of intense, primary emotions that may accompany specific memories. The present study examined how ABM specificity in client narratives was related to expressed emotional arousal in brief emotion-focused and client-centred psychotherapy for depression. Emotion episodes identified in two early-, two middle-, and two late-therapy transcripts drawn from 34 clients from the York I Depression Study were rated for degree of ABM specificity and expressed emotional arousal. A hierarchical linear modelling analysis demonstrated that greater ABM specificity was associated with higher expressed emotional arousal for clients who were no longer depressed at therapy termination.

An empirical analysis of autobiographical memory specificity subtypes in brief emotion-focused and client-centered treatments of depression.

Overgeneral autobiographical memory (ABM) disclosure has been established as a key cognitive marker of clinical depression in experimental research studies. To determine the ecological validity of these findings for psychotherapy treatments of depression, the present study investigated the relationship between change in level of depression and ABM specificity in the context of early, middle, and late therapy session transcripts selected from 34 clients undergoing emotion-focused therapy and client-centered therapy in the York I Depression Study. A hierarchical linear modeling analysis demonstrated that clients disclosed significantly more specific ABMs over the course of therapy. There were no differences in ABM specificity between treatment groups. There was also no evidence that increased specificity differentiated between recovered and unchanged clients at treatment termination.

The CS-preexposure effect in conditioned taste-aversion learning in golden hamsters.

In Experiment 1, golden hamsters were injected with either 0.9% saline or the nausea-inducing agent, lithium chloride (LiCL), immediately after consuming a flavored diet that was either novel or familiar. The LiCl-induced aversion was strong in hamsters for which the flavored diet was novel, but no significant aversion was observed in hamsters that were familiar with the flavored diet. In Experiment 2, the strength of the LiCl-induced aversion was related inversely to the amount of conditioned-stimulus (CS) preexposure and directly to the duration of the preexposure-conditioning interval. Thus, although some previous researchers have suggested that hamsters may not demonstrate the CS-preexposure effect in a conditioned taste-aversion paradigm, they clearly did so under the conditions of the present experiments, and moreover, the characteristics of the CS-preexposure effect in hamsters were generally similar to those observed in rats.

Cholecystokinin reduces ethanol consumption in golden hamsters.

In experimental conditions, golden hamsters (Mesocricetus auratus) avidly consume ethanol solutions. However, they are relatively resistant to the deleterious effects of ethanol even after months of continuous consumption, apparently because they metabolize ethanol rapidly and efficiently. Male hamsters with ad libitum access to food and water were presented with isocaloric solutions [weight/weight (wt./wt.)] of 10% ethanol and 17.75% glucose for 40-min periods on alternate days. When hamsters were injected with 0.9% saline before solution presentation the mean intake of ethanol solution (0.55 g) was about half that of glucose solution (1.08 g). Hamsters derived a mean of 0.36 g/kg/40 min of absolute ethanol from the ethanol solution, an amount that does not seem to exceed their metabolic capacity for ethanol. An intraperitoneal injection of a 2.0-microg/kg dose of the C-terminal octapeptide of cholecystokinin (CCK-8) reduced intakes of both solutions by >50% if administered 5 min before solution presentation, but it was ineffectual if administered 45 min before presentation. When citric acid (2.5 g/l) was added to the glucose solution the baseline intakes of the two solutions were virtually equivalent, and when CCK-8 was administered over a range of doses (0.5-2.0 microg/kg) the intakes of the solutions did not differ significantly at any dose, supporting the suggestion that the pharmacological properties of ethanol play little or no role in mediating the consumption-inhibiting effect of exogenously administered cholecystokinin (CCK). Prior administration of lorglumide, a selective CCK type A receptor antagonist, completely attenuated the inhibitory effect of CCK-8. Findings are consistent with the notion that endogenous CCK plays a key role in the short-term control of ethanol intake in hamsters.