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.

Hot Temperatures, Hostile Affect, Hostile Cognition, and Arousal: Tests of a General Model of Affective Aggression

Abstract: A general model of affective aggression was used to generate predictions concerning hot temperatures. Experiment 1 examined hot temperature effects on hostile affect, hostile cognition, perceived arousal, and physiological arousal in the context of a study of video games. Experiment 2 examined hot temperature effects on hostile affect, perceived and physiological arousal, and general positive and negative affect in the context of brief aerobic exercise. Consistent results were obtained. Hot temperatures produced increases in hostile affect, hostile cognition, and physiological arousal. Hot temperatures also produced decreases in perceived arousal and general positive affect. These results suggest that hot temperatures may increase aggressive tendencies via any of three separate routes. Hostile affect, hostile cognitions, and excitation transfer processes may all increase the likelihood of biased appraisals of ambiguous social events, biased in a hostile direction.

Plant Protein Kinase Families and Signal Transduction

Abstract: Enzymes of the eukaryotic protein kinase superfamily catalyze the reversible transfer of the gamma-phosphate from ATP to amino acid side chains of proteins. Protein kinase function can be counteracted by the action of phosphoprotein phosphatases. Phosphorylation status of a protein can have profound effects on its activity and interaction with other proteins. An estimated 1 to 3% of functional eukaryotic genes encode protein kinases, suggesting that they are involved in many aspects of cellular regulation and metabolism. In plants, protein phosphorylation has been implicated in responses to many signals, including light, pathogen invasion, hormones, temperature stress, and nutrient deprivation. Activities of several plant metabolic and regulatory enzymes are also controlled by reversible phosphorylation. As might be expected from this diversity of function, there is a large array of different protein kinases. Purification of protein kinases and their subsequent cloning, facilitated by the PCR and advances in homology-based cloning techniques, as well as functional analyses, including complementation of conditional yeast mutants and positional cloning of mutant plant genes, has already led to identification of more than 70 plant protein kinase genes. However, the precise functional roles of specific protein kinases and phosphatases during plant growth and development have been elucidated for only a few.