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Elektronische Publikationen der Universität Hohenheim
Institutional Repository
1229 Publications
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  • Engel curves, spatial variation in prices and demand for commodities in Cote d'Ivoire

    This paper aims to estimate the price and income elasticities of the demand for essential commodities in Cote d?Ivoire. Using data from the 2002 Cote d'Ivoire Living Standard Survey and a theoretical framework developed by Crawford et al. (2003), we analyse price effects on the demand for groups of commodities by exploiting a relationship between unit values and commodity quantities and deriving Engel curves. Our findings reveal that the own-price elasticity of meat and dairy products is c...

    Resistenz von Hopfen, Humulus lupulus L., gegen die Hopfenblattlaus, Phorodon humuli (Schrank)

    Die große ökonomische Bedeutung der Hopfenblattlaus Phorodon humuli (Schrank) und die zunehmenden Probleme bei ihrer chemischen Bekämpfung lassen nicht-chemische Kontrollverfahren stärker in den Vordergrund treten. Da bislang keine effizienten biologischen Kontrollmethoden zur Verfügung stehen, bleibt nur die Resistenzzüchtung, und hier die klassische 'Genetisch kontrollierte Re©sistenz', als aussichtsreiches Verfahren übrig. Dabei übt die Pflanze negative Einflüsse auf das Verhalten des Scha...

    Breeding strategies for Sahiwal cattle genetic resources in Kenya

    The Sahiwal breed is an important cattle genetic resource in the tropics where it is vital for subsistence and economic development among various communities. In Kenya a breeding and conservation programme has been in existence for over 45 years with the ascertains of its relevance in light of the producers? production aims and breeding goals still left pending. Moreover, there have been no systematic efforts undertaken to evaluate the suitability of the existing breeding programme or to exam...

    Constraints and potential of livestock insurance schemes: a case study from Vietnam

    Livelihood systems of poor rural households are often so fragile that a small misfortune can destabilize households for years. Strategies for coping with risk include informal mutual aid agreements and/or formal microinsurance schemes. In developing countries, insurance markets are usually underdeveloped.Nevertheless, if the development path is supported by strong structures and institutions, anonymous markets will, over time, replace informal insurance networks as they are more efficient. In...

    Identification and functional studies of two novel serine phosphorylation sites of insulin receptor substrate (IRS)-2: Ser 675 and Ser 907

    Insulin receptor substrate (IRS) proteins are major transducers of the insulin and IGF-1 signal into the PI-3 kinase/PKB and the MAP kinase pathway. In addition to tyrosine phosphoryla-tion, a large number of serine/threonine phosphorylation sites enable the IRS proteins to inte-grate different extra- and intracellular stimuli resulting in positive and negative modulation of the insulin and IGF-1 signal. Chronic hyperphosphorylation of serine/threonine sites of IRS-1 is involved in the develo...
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