482 research outputs found

    A survey of the facilities of twenty-seven philanthropic day nurseries and nursery schools in Boston

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    Thesis (M.A.)--Boston University, 1948. This item was digitized by the Internet Archive

    Predicting and Manipulating Cardiac Drug Inactivation by the Human Gut Bacterium Eggerthella lenta

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    Despite numerous examples of the effects of the human gastrointestinal microbiome on drug efficacy and toxicity, there is often an incomplete understanding of the underlying mechanisms. Here, we dissect the inactivation of the cardiac drug digoxin by the gut Actinobacterium Eggerthella lenta. Transcriptional profiling, comparative genomics, and culture-based assays revealed a cytochrome-encoding operon up-regulated by digoxin, inhibited by arginine, absent in nonmetabolizing E. lenta strains, and predictive of digoxin inactivation by the human gut microbiome. Pharmacokinetic studies using gnotobiotic mice revealed that dietary protein reduces the in vivo microbial metabolism of digoxin, with significant changes to drug concentration in the serum and urine. These results emphasize the importance of viewing pharmacology from the perspective of both our human and microbial genomes.Chemistry and Chemical Biolog

    Chilean trade 1880-1930: A comment on the sources for the Age of Exports

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    This research note discusses the accuracy of the main sources used to study the foreign sector during the export-led growth process in Chile. Chilean foreign trade statistics are available for the period under analysis (1850-1930) and offered a good overview of products exported and imported. Bilateral trade data are also available providing information of exports and imports by origin and destiny. Although more research is needed on trade prices, we conclude that Chilean statistics are reliable and provide a way for understanding the export-led growth in Chile and the trade performance of the Chilean partners

    Failure to launch: cost of living and living standards in Peru during the 19th century

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    Based on a variety of archival sources, this paper presents estimations for cost of living and living standards for Lima, Peru during the 19th century. During this century Peru experienced deep swings in economic activity marked by the independence wars, the War of the Pacific, and a commodity boom. These new series show that a sizable inflationary period during the guano age had dampening effects on the living standards of the popular class. While living standards peaked by mid 1850s, GDP per capita did not do so until two decades later. These results suggest that the guano bonanza failed to lift working-class living standards above subsistence levels. Even though living standards climbed steadily, almost reaching those of England, all these gains were lost by the end of the century.Basado en diversas fuentes primarias, este artículo presenta estimaciones de costo de vida y estándares de vida para Lima, Perú durante el siglo XIX. Durante esta centuria este país sufrió profundos vaivenes en la actividad económica debido a las guerras de la independencia, la guerra del Pacífico y a un auge monoexportador. Estas series delinean un importante proceso inflacionario durante la era del guano que tuvo efectos adversos en los estándares de vida de la clase popular. Mientras que los estándares de vida llegaron a su punto máximo en los mediados de la década de los 50, el PIB per cápita lo hizo dos décadas más tarde. Estos resultados sugieren que la bonanza del guano no logró mejorar el bienestar económico de la clase popular de manera sustentable. A pesar de alcanzar niveles cercanos al inglés, estos beneficios se evaporaron al fin de siglo

    The rise of drug dealing in the life of the North American street gang

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    Historical gang literature traditionally perceived street gangs as boisterous outfits occasionally engaged in delinquency. In recent decades however, street gang behavior has come to be seen ever more as encroaching upon criminality, primarily due to its involvement in drug supply. This article aims to provide a brief historical review as to how the practice of drug supply entered into the life of the street gang, with specific emphasis on The War on Drugs in the 1970s and the rise of the crack cocaine economy in the 1980s
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