998 resultados para ACTION SELECTION


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Iowa Lottery Authority Retailer Information Newsletter

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Iowa Lottery Authority Retailer Information Newsletter

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This report is prepared pursuant to Iowa Code Section 19B.5. This Section required The Department of Administrative Services shall submit a report on the condition of affirmative action, diversity, and multicultural programs in state agencies covered by subsection 1 by September 30 of each year to the governor and the general assembly. Subsection 1 requires the head of each state agency to submit annual report of the affirmative action accomplishments of that agency to the Department of Administrative services.

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Iowa Lottery Retailer Newsletter

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Iowa Lottery Retailer Newsletter

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Iowa Lottery Retailer Newsletter

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Iowa Lottery Retailer Newsletter

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This report is prepared pursuant to Iowa Code Section 19B.5, requiring the Department of Administrative Services to submit a report on the condition of affirmative action, diversity, and multicultural programs in state agencies by September 30 of each year to the governor and the general assembly. Additionally, the report summarizes the annual reports of the affirmative action accomplishments submitted to the Department of Administrative Services by agency directors.

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The peroxisome proliferator-activated receptor gamma (PPARgamma) plays a major role in fat tissue development and physiology. Mutations in the gene encoding this receptor have been associated to disorders in lipid metabolism. A thorough investigation of mice in which one PPARgamma allele has been mutated reveals that male PPARgamma heterozygous (PPARgamma +/-) mice exhibit a reduced body size associated with decreased body weight, reflecting lean mass reduction. This phenotype is reproduced when treating the mice with a PPARgamma- specific antagonist. Monosodium glutamate treatment, which induces weight gain and alters body growth in wild-type mice, further aggravates the growth defect of PPARgamma +/- mice. The levels of circulating GH and that of its downstream effector, IGF-I, are not altered in mutant mice. However, the IGF-I mRNA level is decreased in white adipose tissue (WAT) of PPARgamma +/- mice and is not changed by acute administration of recombinant human GH, suggesting an altered GH action in the mutant animals. Importantly, expression of the gene encoding the suppressor of cytokine signaling-2, which is an essential negative regulator of GH signaling, is strongly increased in the WAT of PPARgamma +/- mice. Although the relationship between the altered GH signaling in WAT and reduced body size remains unclear, our results suggest a novel role of PPARgamma in GH signaling, which might contribute to the metabolic disorder affecting insulin signaling in PPARgamma mutant mice.

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Recombination arrest between X and Y chromosomes, driven by sexually antagonistic genes, is expected to induce their progressive differentiation. However, in contrast to birds and mammals (which display the predicted pattern), most cold-blooded vertebrates have homomorphic sex chromosomes. Two main hypotheses have been proposed to account for this, namely high turnover rates of sex-determining systems and occasional XY recombination. Using individual-based simulations, we formalize the evolution of XY recombination (here mediated by sex reversal; the "fountain-of-youth" model) under the contrasting forces of sexually antagonistic selection and deleterious mutations. The shift between the domains of elimination and accumulation occurs at much lower selection coefficients for the Y than for the X. In the absence of dosage compensation, mildly deleterious mutations accumulating on the Y depress male fitness, thereby providing incentives for XY recombination. Under our settings, this occurs via "demasculinization" of the Y, allowing recombination in XY (sex-reversed) females. As we also show, this generates a conflict with the X, which coevolves to oppose sex reversal. The resulting rare events of XY sex reversal are enough to purge the Y from its load of deleterious mutations. Our results support the "fountain of youth" as a plausible mechanism to account for the maintenance of sex-chromosome homomorphy.

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Iowa Lottery Retailer Newsletter

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Lottery Newsletter for Lottery Retailers

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Iowa Lottery Newsletter for Retailers