Search results for "Olio"
showing 10 items of 630 documents
Bilabiate Flowers: The Ultimate Response to Bees?
2007
† Background and Aims Bilabiate flowers have evolved in many lineages of the angiosperms, thus representing a convincing example of parallel evolution. Similar to keel blossoms, they have obviously evolved in order to protect pollen against pollen-collecting bees. Although many examples are known, a comprehensive survey on floral diversity and functional constraints of bilabiate flowers is lacking. Here, the concept is widened and described as a general pattern. † Methods The present paper is a conceptional review including personal observations of the authors. To form a survey on the diversity of bilabiate blossoms, a search was made for examples across the angiosperms and these were combi…
Effects of Cucumber mosaic virus and Aster yellows phytoplasma (16SrI-B) on the quality of Echinacea purpurea essential oil.
2011
Echinacea purpurea Moench (L.), known as purple coneflower, is one of the most important medicinal plants, used worldwide for its immunostimulant, bacteriostatic and anti-inflammatory properties, as natural drug and/or food supplement (as infusion). In a previous study carried out in 2002 in Italy to verify possible influence of viral infectious on the plant oil composition, the oil from plants (grown at the Herb Garden of Casola Valsenio, Emilia Romagna region) infected by Cucumber mosaic virus (CMV) was compared to the one from healthy plant by combined gas chromatography mass spectrometry (GC/MS) analyses. Significant quantitative variations in their compositions were verified; the infec…
PROVE COMPARATIVE SULLA RICHIESTA DI ENERGIA NECESSARIA PER L'ESTRAZIONE DELL'OLIO DALLE OLIVE E DALLE SANSE DI LAVORAZIONE
1993
Gestión eficiente de carteras: Modelo de Markowitz y el Ibex-35
2019
El objetivo de este trabajo es construir con el máximo detalle posible una frontera eficiente de acuerdo al modelo de Harry Markowitz, conocer con profundidad el modelo y comparar sus resultados con diversos índices bursátiles para analizar el efecto que tiene una diversificación eficiente sobre el rendimiento y el riesgo de una cartera. Para ello nos basaremos en datos históricos del IBEX-35 a los que aplicaremos el modelo con ayuda de distintos programas informáticos de optimización. Veremos cómo realmente sí que es posible crear carteras con menor volatilidad que los títulos que forman el mercado, como es posible que títulos con rendimientos esperados negativos formen parte de carteras e…
Re-Emerging Vaccine-Preventable Diseases in War-Affected Peoples of the Eastern Mediterranean Region—An Update
2017
For the past few decades, the Eastern Mediterranean Region has been one area of the world profoundly shaped by war and political instability. On-going conflict and destruction have left the region struggling with innumerable health concerns that have claimed the lives of many. Wars, and the chaos they leave behind, often provide the optimal conditions for the growth and re-emergence of communicable diseases. In this article, we will highlight three of the major re-emerging vaccine preventable diseases cholera, measles, and polio, in four countries of the Eastern Mediterranean Region that are currently affected by war leading to a migration crisis: Iraq, South Sudan, Syria, and Yemen. The re…
The Eradication of Poliomyelitis in Spain: Projects, Obstacles, Achievements, Realities
2015
he main aim of our paper is to provide a historical approach to the complex process undertaken in Spain to achieve the official WHO certificate of polio eradication in 2002, within the framework of the initiatives launched in the WHO European Region. At the time of the first meeting of the European Regional Commission for the Certification of Poliomyelitis Eradication in 1996, the epidemiological situation and levels of vaccination cover (over 90%) enabled Spain, like other countries, to ensure compliance with the conditions set by the World Health Organization. This showed that the country, at the end of the twentieth century, had achieved high public health standards, which is remarkable …
Venture Capitalists' Decision to Syndicate.
2006
International audience; Financial theory, access to deal flow, selection, and monitoring skills are used to explain syndication in venture capital firms in six European countries. In contrast with U.S. findings, portfolio management motives are more important for syndication than individual deal management motives. Risk sharing, portfolio diversification, and access to larger deals are more important than selection and monitoring of deals. This holds for later stage and for early stage investors. Value adding is a stronger motive for syndication for early stage investors than for later stage investors, however. Nonlead investors join syndicates for the selection and value-adding skills of t…
Uncertainty and cross-border banking flows
2019
Abstract While global uncertainty—measured by the VIX—has proven to be a robust global “push” factor of international capital flows, there has been no systematic study assessing the role of uncertainty in driving bilateral capital flows. This paper examines the effects of higher country-specific uncertainty on cross-border banking flows using data from the Bank for International Settlements Locational Banking Statistics. The bilateral structure of this data allows disentangling supply factors from demand factors, thereby helping identify the effect of higher uncertainty on cross-border banking flows from other confounding factors. The results of this analysis suggest that: (i) uncertainty i…
How does learning affect market liquidity? A simulation analysis of a double-auction financial market with portfolio traders
2007
We study the relationship between liquidity and prices in an artificial financial market where portfolio traders with limited resources interact through a continuous, electronic open book. We depart from the standard asset pricing framework in two ways. First, we assume that investors have incomplete information about the distribution of returns. Second, we model the portfolio choice problem using prospect-type preferences. We model the utility function in terms of deviations of the portfolio growth rate from a specified target growth rate, and we assume that investors are more sensitive to downside movements. We show that the parameters defining the learning process affect the price dynami…
Weak efficiency of the cryptocurrency market: a market portfolio approach
2019
ABSTRACTCryptocurrencies have attracted the attention of many investors and policymakers given the increase in popularity of Bitcoin. In this context, we analyse the cryptocurrency market by means ...