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RAND Journal of Economics 1997 28 372 384 Londregan, J. (1990): Entry and Exit over the

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-area entry rules? VoxEU.org 11 November 2008. Darvas, Z. (2009a): Treaty change is needed to make sense of euro-area entry criteria. VoxEU.org 23 July 2009. Darvas, Z. (2009b): The Baltic challenge and

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965 983 Berry, S. — Reiss, P. (2007): Empirical Models of Entry and Market Structure, Handbook of Industrial Organization . Vol. 3, Riverport Lane, USA: Elsevier

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Abstract

Most accidents in roundabouts occur at the entries, partly due to poor visibility. To analyse this problem a sample roundabout with some visibility obstacles was measured by laser scanner and data were put into a 3D model. The fields of view were studied from the viewpoint heights of car and truck drivers as well. To assess the results, three indicators were defined: the hidden sight distance, the hidden sight triangle area and the angle of hide. These indicators were measured in the point cloud model. Through these indicators the adequacy of visibility conditions can be assessed.

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. [10] Roy P. , Vashishtha M. , et al. ( 2009 ), Heat and mass transfer study in fluidized bed granulation –Prediction of entry length . Particuology , 7 , 215 – 219

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The purpose of our study was to investigate whether endothelium-derived relaxations induced by store depletion are altered in aging rat thoracic aorta. Vascular responses were measured in aortic segments isolated from young (2–4 month) and old (20–24 month) male Sprague-Dawley rats. In phenylephrine-contracted intact tissues, receptor-mediated and receptor-independent endothelium-derived relaxations were induced by acetylcholine (ACh) and sarcoplasmic/endoplasmic reticulum Ca2+ ATPase (SERCA) blocker cyclopiazonic acid (CPA), respectively. In addition, CPA-induced changes in intracellular calcium levels were monitored in fura-2-loaded endothelium-denuded tissues. Real-time quantitative reverse transcription polymerase chain reaction and western blot analysis were performed to determine the transient receptor potential canonical (TRPC) 4 mRNA and protein levels. Endothelial TRPC4 mRNA levels were apparently decreased in aging rats. Immunoblot analysis showed that TRPC4 protein levels significantly decreased in intact aorta from 20- to 24-month-old rats compared to that from 2- to 4-month-old rats. ACh- and CPA-induced endothelium-dependent relaxations decreased in old rat aorta without any change in direct vasodilation induced by sodium nitroprusside. Store-operated Ca2+ entry (SOCE) induced by CPA was significantly decreased, whereas sarcoplasmic reticulum Ca2+ release was unaffected in endothelium-denuded aging rat aorta. In conclusion, TRPC4 downregulation could be associated with decreased endothelium-dependent vasorelaxations. As endothelial nitric oxide synthase is activated by SOCE-induced caveolar internalization, tracking the expression levels of SERCA, ion channels, and/or associated proteins involved in SOCE would lead to the development of novel therapeutics for age-related vasospastic disorders with dysfunctional endothelium.

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, exclusive value that can offset the costs of foreign entry; and Vernon (1966) , who identifies different internationalising motivations and drivers, and the associated directions and choices, at different stages of the product life cycle. These include the

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Contemporary radical changes in the European geographical setting, combined with the consolidation of the globalised international market have resulted in a totally competitive international business environment. Nowadays, as in almost all countries, the Greek enterprises have to operate with a new perspective, based on strategic alliances. These business strategies should be implemented on at least a middle-term basis. This article explains the necessity for adopting these operative techniques in light of the limited presence of the Greek enterprises in the international market. Furthermore, it analyses a sufficient model of cooperative operation, which gives to the enterprises - mainly the small- and medium-sized enterprises (SMEs) - the ability of adapting to the international market.

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It is well demonstrated that wheat-rye 1BL/1RS translocated chromosome leads to some valuable novel traits such as disease resistance, high yield and functional stay-green after anthesis. To understand the physiological mechanism of 1BL/1RS translocation responsible for osmotic stress, two wheat cultivars, CN12 and CN17, carrying the translocated chromosome and MY11 without the translocated chromosome were employed in the study. During 5-day osmotic stress, fresh weight inhibition, chlorophyll content, soluble protein content, MDA concentration, antioxidant enzymes activity and free polyamines content were examined. CN12 and CN17, especially cultivar CN17, registered greater biomass and minor oxidative damage compared with their wheat parent. Meanwhile, the concentration of Spd and Spm in CN17 was significantly higher than the others. In addition, we found a positive correlation of fresh weight inhibition (FWI) and Put concentration, and a negative one with the parameters (Spd + Spm): Put ratio, indicating the importance of higher polyamine (Spd and Spm) accumulation on the adaptation to osmotic stress. Therefore, we proposed that the accumulation of higher polyamines (Spd and Spm) should play an important role on the adaptation of 1BL/1RS translocation lines to osmotic stress and might be important factors for the origin of novel traits introduced by 1BL/1RS.

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