نتایج جستجو برای: r41

تعداد نتایج: 111  

2010
Govinda R. Timilsina Hari B. Dulal

Urban transportation externalities are a key development challenge. Based on the existing literature, the authors illustrate the magnitudes of various external costs, review response policies, and measure and discuss their selection, particularly focusing on the context of developing countries. They find that regulatory policy instruments aimed at reducing local air pollution have been introduc...

Journal: :Frontiers in Earth Science 2023

Economic development and large amounts of industrial production have led to environmental deterioration. The assessment prediction water environment capacity (WEC) are crucial supports for quality target management. Therefore, this study aims improve WEC via changes in the structure analyze economic changes. For purpose, efficiency (EE), use (WUE), treatment (WTE) estimated by EE–SBM (slack-bas...

Journal: :Journal of virology 2003
Wolfram Brune Michael Nevels Thomas Shenk

Viruses have evolved various strategies to prevent premature apoptosis of infected host cells. Some of the viral genes mediating antiapoptotic functions have been identified by their homology to cellular genes, but others are structurally unrelated to genes of known function. In this study, we used a random, unbiased approach to identify such genes in the murine cytomegalovirus genome. From a l...

2002
William H. Sandholm

We consider an implementation problem faced by a planner who manages a roadway network. The problem entails both hidden information and hidden actions. We solve the planner's problem by introducing a new class of mechanisms and a new notion of implementation. The mechanisms, called price schemes, attach transfers to the available routes; they do not involve direct revelation. The method of impl...

2006
José Cotovio Marie-Hélène Grandidier Damien Lelièvre Christelle Bremond Nicole Flamand Sophie Loisel-Joubert Aline Van Der Lee Christophe Capallere Jean-Roch Meunier Jacques Leclaire

The 7 amendment of the EU Cosmetic Directive will lead to the ban of animal testing for cosmetic ingredients in 2009 (acute tests). Many efforts have been made in order to find reliable and relevant alternatives methods to eye irritation testing. 3-D in vitro technology allows the evaluation of chemicals in conditions similar to in vivo use. In this study, we have used the SkinEthic Human Corne...

2007
NATALIA KOLESNIKOVA

Using Census Public Use Micro Sample (PUMS) data for 1980, 1990 and 2000, this paper documents a little-noticed feature of U.S. labor markets—that there is wide variation in the labor market participation rates and annual work hours of white married women across urban areas. This variation is also large among sub-groups, including women with children and those with different levels of education...

2012
Vivien Procher Colin Vance Thomas K. Bauer Wolfgang Leininger

Drawing on individual-level mobility data from Germany between 1996 and 2009, this analysis econometrically investigates the determinants of automobile, public transit, and non-motorized travel against the backdrop of two questions: 1) Does gender play a role in determining the relative use of motor and non-motorized modes? 2) If so, how is this role mitigated or exacerbated by other socioecono...

2003
Arjan Ruijs Caspar Schweigman Clemens Lutz

Reductions in transport and transaction costs are expected to have a major effect on the functioning of food markets in developing countries. For many developing countries, this is a relevant issue as it may have important consequences for the food markets in urban and rural deficit areas. A partial equilibrium model is presented to analyze the effects of reduced costs on cereal price formation...

2007
Colin Vance Rich Iovanna Wolfgang Leininger

Focusing on individual motorists in car-owning households in Germany, this analysis econometrically investigates the determinants of automobile travel for non-work service activities against the backdrop of two questions: 1) Does gender play a role in determining the probability of car use and the distance driven? 2) If so, how is this role mitigated or exacerbated by other socioeconomic attrib...

Journal: :PloS one 2015
Rebekah van Bruggen Christian Gualtieri Alexandra Iliescu Chalisa Louicharoen Cheepsunthorn Punchalee Mungkalasut Jean-François Trape David Modiano Bienvenu Sodiomon Sirima Pratap Singhasivanon Mark Lathrop Anavaj Sakuntabhai Jean-François Bureau Philippe Gros

Pyruvate kinase (PKLR) is a critical erythrocyte enzyme that is required for glycolysis and production of ATP. We have shown that Pklr deficiency in mice reduces the severity (reduced parasitemia, increased survival) of blood stage malaria induced by infection with Plasmodium chabaudi AS. Likewise, studies in human erythrocytes infected ex vivo with P. falciparum show that presence of host PK-d...

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