857 research outputs found

    Phenotypic Expression in the Paper Wasp \u3ci\u3ePolistes Fuscatus\u3c/i\u3e (Hymenoptera: Vespidae)

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    Quantification of color/color pattern in Polistes fuscatus (Fabricius) revealed that these attributes were the interaction of two antagonistic color sequences; their expression being highly correlated with nest microclimate (relative humidity-temperature). Color/ color pattern expressions were modified under experimental conditions to produce forms having natural counterparts in the field. Principal coordinates analyses and trend surface analyses using specimens collected throughout the United States indicated three color pattern trends, representing three distinct geographic areas, and, when objectively defined, without intergradation between and/or among areas. It was concluded that fuscatus should not be considered a widespread, polytypic species; rather, as three discrete species: an eastern, P. fuscatus (Fabricius); a western, P. aurifer Saussure; and an undescribed yellow form from the southwestern United States

    Jim Crow on the Down Low : Subtle Racial Appeals in Presidential Campaigns

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    Ohio Hazardous Material Transportation Act: An Overview

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    On June 24, 1988, in Miamisburg, Ohio, Governor Richard F. Celeste signed into law H.B. 428, (known as Ohio\u27s Hazardous Material Transportation Act, hereinafter referred to as the Act) a comprehensive legislative initiative regulating the transportation of hazardous materials. The signing of the Act was the culmination of a two year effort to solve a problem that Ohioians, and the nation as a whole, became aware of in July, 1986 in Miamisburg, Ohio. The new law provides for: a registration system with a graduated fee structure, pre-notification and route assessments for ultra-hazardous materials, and a civil forfeiture system with penalties of up to $10,000 for hazardous material and safety violations

    The Skn7 Response Regulator of \u3ci\u3eSaccharomyces cerevisiae\u3c/i\u3e Interacts with Hsf1 In Vivo and Is Required for the Induction of Heat Shock Genes by Oxidative Stress

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    The Skn7 response regulator has previously been shown to play a role in the induction of stress-responsive genes in yeast, e.g., in the induction of the thioredoxin gene in response to hydrogen peroxide. The yeast Heat Shock Factor, Hsf1, is central to the induction of another set of stress-inducible genes, namely the heat shock genes. These two regulatory trans-activators, Hsf1 and Skn7, share certain structural homologies, particularly in their DNA-binding domains and the presence of adjacent regions of coiled-coil structure, which are known to mediate protein–protein interactions. Here, we provide evidence that Hsf1 and Skn7 interact in vitro and in vivo and we show that Skn7 can bind to the same regulatory sequences as Hsf1, namely heat shock elements. Furthermore, we demonstrate that a strain deleted for the SKN7 gene and containing a temperature-sensitive mutation in Hsf1 is hypersensitive to oxidative stress. Our data suggest that Skn7 and Hsf1 cooperate to achieve maximal induction of heat shock genes in response specifically to oxidative stress. We further show that, like Hsf1, Skn7 can interact with itself and is localized to the nucleus under normal growth conditions as well as during oxidative stress

    Viscous normal shock solutions including chemical, thermal, and radiative nonequilibrium

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    Peer Reviewedhttp://deepblue.lib.umich.edu/bitstream/2027.42/76510/1/AIAA-711-172.pd
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