1000 resultados para 330 Economia
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Discarded tires present major disposal and environmental problems. The recycling of those tires in asphalt cement concrete is what this research deals with. The Iowa DOT and the University of Northern Iowa (UNI) are evaluating the use of discarded tires in asphalt rubber cement and rubber chip mixes. The project is located on US 61 between Blue Grass and Muscatine in Muscatine County. It contains four rubberized asphalt sections and control sections. One section consists of reacted rubber asphalt cement used in both the binder and surface courses, and one section, both lanes, contains a rubber chip mix. The reacted rubber asphalt and the rubber chip mixes were laid in July 1991. The project construction went well with a few problems of shoving and cracking of the mat. This report contains information about procedures and tests that were run and those that will be run. It also has a cost comparison since this is a major concern with the use of asphalt rubber. Evaluation of this project will continue for five years. Three more research projects containing rubberized asphalt were constructed in 1991 and another is to be constructed in 1992.
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FTO is the strongest known genetic susceptibility locus for obesity. Experimental studies in animals suggest the potential roles of FTO in regulating food intake. The interactive relation among FTO variants, dietary intake and body mass index (BMI) is complex and results from previous often small-scale studies in humans are highly inconsistent. We performed large-scale analyses based on data from 177,330 adults (154 439 Whites, 5776 African Americans and 17 115 Asians) from 40 studies to examine: (i) the association between the FTO-rs9939609 variant (or a proxy single-nucleotide polymorphism) and total energy and macronutrient intake and (ii) the interaction between the FTO variant and dietary intake on BMI. The minor allele (A-allele) of the FTO-rs9939609 variant was associated with higher BMI in Whites (effect per allele = 0.34 [0.31, 0.37] kg/m(2), P = 1.9 × 10(-105)), and all participants (0.30 [0.30, 0.35] kg/m(2), P = 3.6 × 10(-107)). The BMI-increasing allele of the FTO variant showed a significant association with higher dietary protein intake (effect per allele = 0.08 [0.06, 0.10] %, P = 2.4 × 10(-16)), and relative weak associations with lower total energy intake (-6.4 [-10.1, -2.6] kcal/day, P = 0.001) and lower dietary carbohydrate intake (-0.07 [-0.11, -0.02] %, P = 0.004). The associations with protein (P = 7.5 × 10(-9)) and total energy (P = 0.002) were attenuated but remained significant after adjustment for BMI. We did not find significant interactions between the FTO variant and dietary intake of total energy, protein, carbohydrate or fat on BMI. Our findings suggest a positive association between the BMI-increasing allele of FTO variant and higher dietary protein intake and offer insight into potential link between FTO, dietary protein intake and adiposity.
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La raó fonamental que ens ha menat a fer aquest estudi és la sorprenent hibridació de materials simbòlics que es troba en les vides, a cavall dels segles XIX i XX, dels propietaris d'Ivars d'Urgell, Pere Segarra, particularment, i Josep Segarra. Efectivament, veiem, sincronitzats en la seva acció, símbols netament de l'antic règim i símbols moderníssims. Símbols que els realcen, que els institueixen, directament, i d'altres -els que deriven dels mecanismes de reproducció social de l'estat liberal- que ho fan de manera indirecta. Alhora que practiquen el ritual del "pa de caritat" per als pobres del poble i passavolants, d'altra banda subscriuen pòlisses d'assegurança de béns immobles, participen directament en les successives fases d'irrigació del terme d'Ivars, o introdueixen adobs i insecticides en la cultura agrària local. Alcaldes i membres de diferents comissions municipals, cedeixen solemnement al poble les suposades relíquies -que ells posseeixen- del seu patró Sant Andreu. En qualsevol cas, la característica bàsica d'una manipulació simbòlica com aquesta seria que, tant si es tracta de símbols antics com moderns, tant si són d'aplicació directa com indirecta, són els propietaris com els Segarra els qui, en el context local, detenen un monopoli ostentós dels actius simbòlics.
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Quan es parla d'educació, en termes econòmics i en les societats actuals, se'ns demostra la dependència que aquesta té de les formes d'organització de l'economia. Se'ns torna a recordar aquella correspondència -encara que no sempre exacta i sovint matisable- que apuntaven Bowles i Gintis entre el sistema socioeconòmic i els sistemes educatius, sobretot en els seus currículums ocults.
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A finales de la Edad del Bronce comienzan a producirse importantes transformaciones en el seno de las comunidades del noreste peninsular que tendrán continuidad durante los siglos VII y VI ANE y que se caracterizarán por la paulatina formación de una clase aristocrática de carácter guerrero. Sin embargo, esta élite no se consolidará definitivamente en el poder hasta el ibérico antiguo, constituyéndose así la estructura social sobre la que se desarrollarán los estados arcaicos durante el ibérico pleno.
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[cat]El Serrat dels Espinyers constitueix, per si mateix, un punt important en el poc conegut poblament ibéric del Pallars. En el panorama arqueològic català esdevé un cas únic pel que fa a la utiliztzació dels animals en activitats rituals vinculades tant a espais funeraris com domèstics, en particular pel volum i la qualitat de les dades aportades. L'anàlisi de les restes òssies animals i d'altes materials associats han procurart un conjunt de dades que permeten establir hipòtesis sobre els comportaments rituals de la societat ibèrica que va ocupar el jaciment. D'altra banda, es posa en evidència la importància de dos tàxons: els èquids i els gossos, i la seva relació amb l'activitat econòmica que hi va poder tenir lloc. [eng]Serrat dels Espinyers is an important site within the little known Iberian culture settlement of the Pallars area in Catalonia. Regarding the use of animals in ritual activities related to both domestic and funerary spaces, the data provided by this site are unique within the Catalan archaeology. The results obtained in the analysis of animal bones and other associated materials have allowed us to establish new hypotheses about the ritual behavior in Iberian society. Moreover, the importance of two taxa: horses and dogs, has been highlighted, as well as their relationship with the economic activity that could have taken place on the site.
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For economical and ecological reasons, synthetic chemists are confronted with the increasing obligation of optimizing their synthetic methods. Maximizing efficiency and minimizing costs in the production of molecules and macromolecules constitutes, therefore, one of the most exciting challenges of synthetic chemistry. The ideal synthesis should produce the desired product in 100% yield and selectivity, in a safe and environmentally acceptable process. In this highlight the concepts of atom economy, molecular engineering and biphasic organometallic catalysis, which address these issues at the molecular level for the generation of "green" technologies, are introduced and discussed.
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Peer-reviewed
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Peer-reviewed
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Peer-reviewed
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Peer-reviewed
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Peer-reviewed
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Article d'economia, adreçat a tot tipus de població, en especial estudiants de batxillerat i cicles formatius de la rama administrativa i comercial.
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Article 2 de la sèrie Tastets d'economia, adreçada al target: principiants, estudiants de batxillerat i de cicles formatius, de l'àrea de les ciències socials.