492 research outputs found

    Allelopathic and Antifungal potentials of endemic Salvia absconditiflora Greuter & Burdet collected from different locations in Turkey

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    We determined the antifungal and bioherbicidal properties of essential oils of Salvia absconditiflora. Its plant samples were collected from 10-locations in Kirsehir province, Turkey and dried in shade. Essential oils of dried plant samples were extracted by hydro-distillation method using a Schilcher device and the compounds identified in S. absconditiflora essential oils by GC-MS analysis were: Camphor (10.52-58.64%), Bicyclo [2.2.1] Heptane-2-One, 1.7.7 (21.94-30.16%) and viridiflorol (3.42-25.2%). S. absconditiflora essential oil (a dose of 10 mu l/petri dishes) inhibited the mycelium growth of Sclerotinia sclerotiorum and Alternaria solani pathogens by 9.3 and 54.40 %, respectively. At dose of 20 mu l/petri dish, the essential oil completely inhibited the mycelium growth of both pathogens. The S. absconditiflora essential oil at 20 mu l/petri dish. was 100 % phytotoxic to seed germination and seedling growth of Lepidum sativum and Amaranthus retroflexus. Thus S. absconditiflora essential oil can be used as an alternative to synthetic fungicide and herbicide to control the plant pathogenic fungi and weeds, respectively

    An intertemporal, multi-region general equilibrium model of agricultural trade liberalization in the South Mediterranean NICs, Turkey, and the European Union

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    With the aid of an intertemporal, multi-region general equilibrium model, the authors study issues of agricultural trade liberalization, growth and capital accumulation in the context of a world economy moving towards a multi-polar structure. They specifically focus on Turkey, the European Union, the Middle East, and the Economies in Transition; and study alternative scenarios of formation of customs unions and increased trade orientation. The model is based on intertemporal general equilibrium theory with Ramsey-type dynamics. The world economy is fully endogenized within a 9-region specification, with Turkey, EU, Middle East and the Transition Economies constituting as one of the indigenous regions. A key feature of the model is its explicit recognition of both the commodity and foreign capital flows across regions in an endogenous setting, and its explicit portrayal of the out-of-steady state dynamics under an intertemporal optimization framework. They explore the short- versus the long-run economic impacts of alternative trade and investment policies on agricultural production, foreign trade, resource allocation, accumulation, consumer welfare, and income distribution in the regions of analyis. The results reveal significant gains from increased bilateral trade between the identified regions, and further underscore the crucial importance of financing commodity trade deficits in sustaining the accumulation patterns.Economics Models. ,Trade liberalization. ,Foreign trade Mathematical models. ,Agricultural trade. ,TMD ,

    A narrow DNNDNN quasi-bound state

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    The energies and widths of DNNDNN quasi-bound states with isospin I=1/2 are evaluated in two methods, the fixed center approximation to the Faddeev equation and the variational method approach to the effective one-channel Hamiltonian. The DNDN interactions are constructed so that they dynamically generate the Λc(2595)\Lambda_c(2595) (I=0, Jπ=1/2J^{\pi} =1/2^-) resonance state. We find that the system is bound by about 250 MeV from the DNNDNN threshold, s3500\sqrt{s} \sim 3500 MeV. Its width including both the mesonic decay and the DD absorption, is estimated to be about 20-40 MeV. The I=0 DNDN pair in the DNNDNN system is found to form a cluster that is similar to the Λc(2595)\Lambda_c(2595).Comment: 17 pages, 18 figures, 3 table

    Determinants of private consumption

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    This paper looks at the evolution of consumption theory over time and critically examines the widely accepted permanent income / life cycle hypotheses concerning consumer behaviour in terms of the empirical evidence. Attention is also devoted to the role of time horizon, time preference and capital market imperfections in determining the consumption / savings split of individual consumers. The paper points out the forecasting inadequacies of an essentially Keynesian framework due to its insufficient attention to expectations and forward looking behaviour. The likely key influences on consumption trends in the Community over the medium to long run are examined including the reaction of consumption to both ongoing budgetary consolidation and financial liberalisation, the impact of taxation and social welfare reforms and finally the effect of demographic changes.consumption, consumers

    g_phi-pion-gamma coupling constant in light cone QCD sum rules

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    The coupling constant of g_phi-pion-gamma decay is calculated using light cone QCD sum rules. A comparison of our result with the ones existing in the literature is presented.Comment: 9 pages, 2 figure

    Scalar Quarkonia at Finite Temperature

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    Masses and decay constants of the scalar quarkonia, χQ0(Q=b,c)\chi_{Q0} (Q=b,c) with quantum numbers IG(JPC)=0+(0++)I^G(J^{PC})=0^{+}(0^{++}) are calculated in the framework of the QCD sum rules approach both in vacuum and finite temperature. The masses and decay constants remain unchanged up to T100 MeVT\simeq100~MeV but they start to diminish with increasing the temperature after this point. At near the critic or deconfinement temperature, the decay constants reach approximately to 25% of their values in vacuum, while the masses are decreased about 6% and 23% for bottom and charm cases, respectively. The results at zero temperature are in a good consistency with the existing experimental values and predictions of the other nonperturbative approaches. Our predictions on the decay constants in vacuum as well as the behavior of the masses and decay constants with respect to the temperature can be checked in the future experiments.Comment: 12 Pages, 9 Figures and 2 Table
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