University of Arkansas

About: University of Arkansas is a education organization based out in Fayetteville, Arkansas, United States. It is known for research contribution in the topics: Population & Poison control. The organization has 17225 authors who have published 33329 publications receiving 941102 citations. The organization is also known as: Arkansas & UA.

Making Sense of Climate Change: How Story Frames Shape Cognition

Abstract: In 2006, Adam J. Berinsky and Donald R. Kinder published findings in the Journal of Politics that demonstrated that framing news as a story influences how individuals cognitively organize concepts and information. The study presented here moves forward in this tradition. This research combines samples obtained in the springs of 2009 and 2010 while conducting online experiments. In these experiments, slightly over 2,000 respondents are asked to organize concepts presented in one of three culturally nuanced stories about climate change or where information is presented as a list. Hierarchical cluster analysis indicates that when respondents are exposed to culturally congruent stories, respondent organizational patterns are more likely to mirror the story. We discuss the implications of these findings.

The first phenalenyl-based neutral radical molecular conductor

Abstract: We report the preparation, crystallization, and solid-state characterization of a spiro-biphenalenyl radical. The crystal structure shows that the radical is monomeric in the solid state and withou...

Parenting Stress of Low-Income Parents of Toddlers and Preschoolers: Psychometric Properties of a Short Form of the Parenting Stress Index

Abstract: SYNOPSIS Objective. This study examines psychometric properties of 2 scales of the Parenting Stress Index—Short Form (PSI—SF) in a sample of preschool children from low-income families. Design. The factor structure, reliability, and validity of the Parental Distress and Parent—Child Dysfunctional Interaction subscales were assessed for 1122 Early Head Start parents of 15 (n = 959), 25 (n = 899), and 37-month-old (n = 845) children in a multisite study. Confirmatory factor analyses (CFA) compared the fit of 2-factor scales that are recommended by the developer with theoretically derived 5-factor scales. Results. CFA indicated that the 5-factor scales fit the data better than the 2-factor scales. Both 2 and 5-factor scales had high internal consistency, and the pattern of relations between the new scales and validity constructs support their usefulness. Conclusions. The PSI—SF scales can be helpful in clinical applications because the proposed scales clarify relations between parent and child outcomes and s...

Plant Growth and Nitrogenase Activity of Glyphosate-Tolerant Soybean in Response to Foliar Glyphosate Applications

Abstract: Glyphosate [N-(phosphonomethyl)glycine] inhibits 5-enolpyruvylshikimate-3-phosphate synthase, EC 2.5.1.19 (EPSPS), thereby blocking aromatic amino acid synthesis. While glyphosate-tolerant (GT) soybean [Glycine max (L.) Merr.] contains resistant EPSPS, the N 2 -fixing symbiont in soybean root nodules, Bradyrhizobium japonicum, does not contain a resistant enzyme, and glyphosate spray to GT soybean may interfere with the symbiotic relationship. Glyphosate-tolerant soybean was treated with glyphosate at several different stages of development to evaluate N 2 fixation, growth, and yield in a series of greenhouse, growth chamber, and field experiments. Early applications of glyphosate generally delayed N 2 fixation and decreased biomass and N accumulation in the cultivar Terral TV5866RR (TV5866RR) harvested at 19 d after emergence (DAE), but plants had recovered by 40 DAE. The biomass and N content of GT soybean were also decreased by glyphosate in plants that were grown with available soil N. There were differences in sensitivity to glyphosate among GT cultivars, with biomass decreases in response to glyphosate ranging from 0 to 30% at 40 DAE for the most tolerant and sensitive cultivars that were evaluated. In growth chamber studies, N 2 fixation was more sensitive to water deficits in glyphosate-treated plants. In field studies, there was no measured effect of glyphosate on GT soybean at Fayetteville, AR where there was adequate soil water throughout the growing season. However, glyphosate tended to decrease biomass and seed yields under conditions of limited soil water at Keiser, AR.