University of Missouri

About: University of Missouri is a education organization based out in Columbia, Missouri, United States. It is known for research contribution in the topics: Population & Poison control. The organization has 41427 authors who have published 83598 publications receiving 2911437 citations. The organization is also known as: Mizzou & Missouri-Columbia.

Teacher Teams and Distributed Leadership: A Study of Group Discourse and Collaboration

Abstract: Purpose:This article explores distributed leadership as it relates to two teacher teams in one public secondary school Both situational and social aspects of distributed leadership are foci of investigationMethods:The qualitative study used constant comparative analysis and discourse analysis to explore leadership as a distributed phenomenon Data from field notes and video recordings of two teacher teams during one semester were usedFindings:Three constructs emerged that informed our understanding of collaborative interaction within each professional learning team: purpose, autonomy, and patterns of discourse Purpose and autonomy, manifest as organizational conditions, largely shape patterns of discourse that characterize the interaction of the team members We argue that the nature of purpose and autonomy within a teacher team can influence the social distribution of leadershipConclusions:The nature of teams in shared governance structures—the fact that teams can organize to either find or solve pr

Psychometric properties of the eating disorder examination-questionnaire: factor structure and internal consistency.

Abstract: Objective: The purpose of this investigation was to evaluate the factor structure and the internal consistency of the Eating Disorder Examination-Questionnaire (EDE-Q). Method: The EDE-Q was administered to 203 women with bulimic symptoms, who were recruited from five Midwestern communities. Results: Acceptable levels of internal consistency were observed for the EDE-Q total score (α = .90) and subscales: Restraint (α = .70), Eating Concern (α = 0.73), Shape Concern (α = 0.83) and Weight Concern (α = 0.72). Exploratory factor loadings using Principal Axis Analysis supported the Eating Concern and Restraint subscales. Most of the Shape Concern and Weight Concern items loaded on one factor, with the exception of the items focusing on the importance of weight and shape in self-evaluation and preoccupation with shape and weight. Conclusion: The results of this study provide support for the internal consistency of the EDE-Q and indicate a need for further examination of the factor structure of this instrument. © 2007 by Wiley Periodicals, Inc. Int J Eat Disord 2007

Calculated effective Hamiltonian for La2CuO4 and solution in the impurity Anderson approximation.

Abstract: We report local-density-functional calculations of hybridization matrix elements and effective electron-electron interactions in ${\mathrm{La}}_{2}$Cu${\mathrm{O}}_{4}$ defining a general effective Hamiltonian that we propose as an appropriate starting point for many-body calculations in this material. The parameter values lend support to an Anderson lattice model. We find the impurity approximation to this model yields a magnetic ground state of ${x}^{2}\ensuremath{-}{y}^{2}$ symmetry, a 1-2-eV insulating gap bounded by ionization and affinity levels of the same symmetry, and a calculated $d$ spectral weight in qualitative agreement with photoemission experiments. We discuss anticipated modification of these results by lattice effects.

Zinc transporters that regulate vacuolar zinc storage in Saccharomyces cerevisiae.

Abstract: All cells regulate their intracellular zinc levels. In yeast, zinc uptake is mediated by Zrt1p and Zrt2p, which belong to the ZIP family of metal transporters. Under zinc limitation, ZRT1 and ZRT2 transcription is induced by the Zap1p transcriptional activator. We describe here a new component of zinc homeostasis, vacuolar zinc storage, that is also regulated by Zap1p. Zinc-replete cells accumulate zinc in the vacuole via the Zrc1p and Cot1p transporters. Our results indicate that another zinc transporter, Zrt3p, mobilizes this stored zinc in zinc-limited cells. ZRT3 is a Zap1p-regulated gene whose transcription increases in low zinc. Zrt3p is also a member of the ZIP family and it localizes to the vacuolar membrane. The effects of ZRT3 mutation and overexpression on cell growth, cellular zinc accumulation and intracellular labile zinc pools are all consistent with its proposed role. Furthermore, we demonstrate that zrt3 mutants inefficiently mobilize stored zinc to offset deficiency. Thus, our studies define a system of zinc influx and efflux transporters in the vacuole that play important roles in zinc homeostasis.