PRISM and Emotions: Understanding the Role of Fear and Hope toward Vaccine Information Seeking Intentions.

Vaccines represent one of the greatest health efforts to help combat diseases, yet they often evoke emotional responses among individuals. These emotional responses can influence an individual's desire to seek information about vaccines. The purpose of this research was to examine these relationships further using the Planned Risk Information Seeking Model (PRISM) and explore the role of emotions, specifically fear and hope, on vaccine-related information seeking intentions. Two separate models were tested using the PRISM model, one for fear and one for hope. Results suggest fear did not have a significant direct effect on vaccine information seeking, while hope had a positive and significant relationship. Interestingly, both attitude toward seeking and perceived current knowledge each had a positive relationship with information seeking intentions in the fear and hope models. Future research should continue to examine the role of specific emotions within the PRISM model to better predict information seeking intentions.

Vertical distribution of prokaryotes communities and predicted metabolic pathways in New Zealand wetlands, and potential for environmental DNA indicators of wetland condition.

Globally, wetlands are in decline due to anthropogenic modification and climate change. Knowledge about the spatial distribution of biodiversity and biological processes within wetlands provides essential baseline data for predicting and mitigating the effects of present and future environmental change on these critical ecosystems. To explore the potential for environmental DNA (eDNA) to provide such insights, we used 16S rRNA metabarcoding to characterise prokaryote communities and predict the distribution of prokaryote metabolic pathways in peats and sediments up to 4m below the surface across seven New Zealand wetlands. Our results reveal distinct vertical structuring of prokaryote communities and metabolic pathways in these wetlands. We also find evidence for differences in the relative abundance of certain metabolic pathways that may correspond to the degree of anthropogenic modification the wetlands have experienced. These patterns, specifically those for pathways related to aerobic respiration and the carbon cycle, can be explained predominantly by the expected effects of wetland drainage. Our study demonstrates that eDNA has the potential to be an important new tool for the assessment and monitoring of wetland health.

Belowground legacies of Pinus contorta invasion and removal result in multiple mechanisms of invasional meltdown.

Plant invasions can change soil biota and nutrients in ways that drive subsequent plant communities, particularly when co-invading with belowground mutualists such as ectomycorrhizal fungi. These effects can persist following removal of the invasive plant and, combined with effects of removal per se, influence subsequent plant communities and ecosystem functioning. We used field observations and a soil bioassay with multiple plant species to determine the belowground effects and post-removal legacy caused by invasion of the non-native tree Pinus contorta into a native plant community. Pinus facilitated ectomycorrhizal infection of the co-occurring invasive tree, Pseudotsuga menziesii, but not conspecific Pinus (which always had ectomycorrhizas) nor the native pioneer Kunzea ericoides (which never had ectomycorrhizas). Pinus also caused a major shift in soil nutrient cycling as indicated by increased bacterial dominance, NO3-N (17-fold increase) and available phosphorus (3.2-fold increase) in soils, which in turn promoted increased growth of graminoids. These results parallel field observations, where Pinus removal is associated with invasion by non-native grasses and herbs, and suggest that legacies of Pinus on soil nutrient cycling thus indirectly promote invasion of other non-native plant species. Our findings demonstrate that multi-trophic belowground legacies are an important but hitherto largely unconsidered factor in plant community reassembly following invasive plant removal.

The influence of uncertainty and social support on information seeking concerning illicit stimulant use among young adults.

Using the Theory of Motivated Information Management (TMIM) and the concept of desired informational support as a framework, this project examined factors in the information management process young adults employ in potential information seeking about illicit stimulant drug use with members of their social networks. One hundred and seventy-three individuals participated in the study. Results indicated that (a) uncertainty discrepancy and the desire for informational support covaried, and (b) uncertainty discrepancy, anxiety, and outcome expectancy had significant impacts on the efficacy judgments made by individuals with regard to potential information seeking with their social networks about their stimulant drug use. The study thus provides further evidence for the utility of TMIM as a framework for understanding health communication in regard to drug use, and suggests that desired informational support may be a useful addition to the model for this health issue.

When families talk: applying interpretative phenomenological analysis to African American families discussing their awareness, commitment, and knowledge of organ donation.

This paper applies interpretative phenomenological analysis as a tool to understand ways African American families discuss and make sense of their knowledge, awareness, and commitment of the organ donation process. African American families (n = 20) participated in self-directed conversations based on the organ donor model, which is grounded in the theory of reasoned action and the theory of motivated information management. Results indicate that the media strongly influences an individual's willingness to participate in the organ donation process and their commitment to further discuss their decisions with close family members. Greater attention should be given to cultural-specific campaigns to increase the number of African American donors.

Religiosity, anxiety, and discussions about organ donation: understanding a complex system of associations.

An increasingly large research base on religiosity has shown it to have a buffering effect on anxiety. In a separate vein, scholars interested in organ donation have suggested that both religiosity and anxiety play roles in individuals' willingness to seek information concerning their decisions about organ donations with their family-an event that greatly increases donation rates. This investigation presents 2 studies that examine the associations between religiosity and anxiety (variously measured), on the one hand, and anxiety and individual's information seeking behaviors with family members about organ donation on the other. The first study offers national samples and relies on self-reports, whereas the second study is one of the few organ donation studies to provide observer ratings of interaction between family members on the issue. Results suggest a more complicated role of religiosity with regard to anxiety than previously believed and show a consistent and robust association between anxiety and communication behaviors regarding organ donation. Implications for campaigns are discussed.

Influence of muscle architecture on the torque and power-velocity characteristics of young and elderly men.

This study investigated the contribution of muscle architecture to the differences in the torque-velocity and power-velocity relationships between older (OM n = 9, aged 69-82 years) and younger men (YM n = 15, aged 19-35 years). Plantarflexors' (PF) maximal isometric and concentric torques were recorded at 0.87, 1.75, 2.62, 3.49 and 4.36 rad s(-1). Physiological cross-sectional area (PCSA) was calculated as the ratio of muscle volume (determined by magnetic resonance imaging) to muscle fascicle length (Lf, measured by ultrasonography). GM PCSA and Lf of the OM were, respectively, 14.3% (P < 0.05) and 19.3% (P < 0.05) smaller than of the YM. In the OM, GM maximum isometric torque and maximum contraction velocity (Vmax), estimated from Hill's equation were, respectively, 48.5 and 38.2% lower (P < 0.001) than in the YM. At all contraction velocities, the OM produced less torque than the YM (46.3% of YM at 0.87 rad s(-1) to 14.7% at 4.36 rad s(-1), P < 0.001). Peak power (PP) of the OM was 80% lower than that of the YM and normalisation of PP to muscle volume only reduced this difference by 10%. Normalisation of torque to PCSA reduced, but did not eliminate, differences in torque between YM and OM (9.6%) and differences in torque/PCSA increased with contraction velocity (P < 0.05). After normalisation of velocity to Lf, the difference in Vmax between the OM and the YM was reduced to 15.9%. Thus, although muscle architecture contributes significantly to the differences in the torque- and power-velocity properties of OM and YM, other contractile factors, intrinsic to the muscle, seem to play a role. It is noteworthy that the deficit in PP between OM and YM is far greater than that of muscle torque, even after normalisation of PP to muscle volume. This finding likely plays an important role in the loss of mobility in old age.

Triceps surae muscle power, volume, and quality in older versus younger healthy men.

This study investigated whether loss of power with aging is fully accounted for by a decrease in muscle volume. Triceps surae power and volume (VOL) were measured in 18 older (OM: 69-82 years) and 12 younger men (YM: 19-35 years). Isokinetic peak torque was measured to determine torque-velocity and power-velocity relationships. Both peak power observed (PP(obs)) and peak power estimated from Hill's equation (PP(est)) were markedly reduced in the OM (PP(obs) was 45% and PP(est) was 43% of those of the YM). VOL was 81% of that of the YM (p <.001). Specific power (PP(est)/VOL) of the OM was 55.2% of that of the YM (p <.001). Torque at PP(est) accounted for a greater proportion of the decline in PP(est) in the OM than did optimum velocity (50% vs 13%, respectively). Hence, the present results showed that only approximately half of the loss in triceps surae peak power in old age is due to decreases in muscle VOL.