Search results for " PES"
showing 10 items of 388 documents
Juan Peset Aleixandre: científico, político, ciudadano
2006
Juan Peset Aleixandre
Apuntes sobre la lucha contra la plaga de langosta en los escritos de los siglos modernos
2008
La inquietud suscitada por los efectos de las plagas de langosta, más allá del ámbito estrictamente campesino, históricamente ha transcendido a reyes, legistas, médicos o historiadores, que dejaron constancia de ella en sus obras o en la legislación. El presente estudio recopila información sobre el impacto que estas plagas causaron sobre todos los estamentos de la sociedad durante los siglos modernos. The concern about the effects of locust plagues, beyond the rural sphere, has historically transcended to kings, lawyers, doctors and historians, who have left evidence thereof in their works and legislation. The present study compiles together information on the impact of these pests in all …
Occurrence of priority pollutants in WWTP effluents and Mediterranean coastal waters of Spain
2011
A comprehensive study aimed at evaluating the occurrence, significance of concentrations and spatial distribution of priority pollutants (PPs) along the Comunidad Valenciana coastal waters (Spain) was carried out in order to fulfil the European Water Framework Directive (WFD). Additionally, PP concentrations were also analysed in the effluent of 28 WWTPs distributed along the studied area. In coastal waters 36 organic pollutants of the 71 analysed, including 26 PPs were detected although many of them with low frequency of occurrence. Only 13 compounds, which belong to four different classes (VOCs, organochlorinated pesticides, phthalates and tributyltin compounds (TBT)) showed a frequency o…
Distribuciones de probabilidad alternativas para la gestión de riesgo en mercados financieros
2014
Esta tesis se constituye de seis Capítulos y está organizada de la siguiente manera: el primer Capítulo tiene carácter introductorio al tema, se presentan los aspectos preliminares de la investigación, incluyendo los elementos básicos de la teoría financiera. El Capítulo se divide en dos temas: los modelos de valoración de derivados y los cálculos del VaR y CVaR. Adicionalmente en este Capítulo se introducen las familias de distribuciones que se usarán en sus formas estándar con media cero y varianza uno, y se presentan algunas de sus propiedades estadísticas teóricas. Estas familias de distribuciones presentan la ventaja de ser muy flexibles y de ilustrar muchas propiedades de interés en e…
Toxicity of several d-endotoxins of Bacillus thuringiensis against Helicoverpa armigera (Lepidoptera: Noctuidae) from Spain
2005
Abstract Toxicity and larval growth inhibition of 11 insecticidal proteins of Bacillus thuringiensis were evaluated against neonate larvae of Helicoverpa armigera, a major pest of important crops in Spain and other countries, by a whole-diet contamination method. The most active toxins were Cry1Ac4 and Cry2Aa1, with LC50 values of 3.5 and 6.3 μg/ml, respectively. At the concentrations tested, Cry1Ac4, Cry2Aa1, Cry9Ca, Cry1Fa1, Cry1Ab3, Cry2Ab2, Cry1Da, and Cry1Ja1, produced a significant growth inhibition, whereas Cry1Aa3, Cry1Ca2, and Cry1Ea had no effect.
Suppression ofBotrytis cinereacausing the grey mould disease of grape-vine by an aggressive mycoparasite,Pythium radiosum
1999
Pythium radiosum Paul has been found to be an aggressive mycoparasite of Botrytis cinerea which causes grey mould disease on the grape-vine. The mycoparasitic fungus enters the host mycelium, coagulates its protoplasm, empties its contents and finally comes out producing numerous ramifications and sexual structures. When the infected mycelium of B. cinerea is applied to the leaves of the grape-vine, the characteristic grey mould symptoms fail to appear. Since P. radiosum causes no harm to the grape-vine, it can be used as a biological control agent against B. cinerea. A brief account of the mycoparasite and its antagonism towards B. cinerea is discussed here.
Distinct Clones of Yersinia pestis Caused the Black Death
2010
From AD 1347 to AD 1353, the Black Death killed tens of millions of people in Europe, leaving misery and devastation in its wake, with successive epidemics ravaging the continent until the 18th century. The etiology of this disease has remained highly controversial, ranging from claims based on genetics and the historical descriptions of symptoms that it was caused by Yersinia pestis to conclusions that it must have been caused by other pathogens. It has also been disputed whether plague had the same etiology in northern and southern Europe. Here we identified DNA and protein signatures specific for Y. pestis in human skeletons from mass graves in northern, central and southern Europe that …
Broomrape weeds. Underground mechanisms of parasitism and associated strategies for their control: a review
2016
prod 2018-285d SPE GESTAD Agrosup INRA CT?; International audience; Broomrapes are plant-parasitic weeds which constitute one of the most difficult-to-control of all biotic constraints that affect crops in Mediterranean, central and eastern Europe, and Asia. Due to their physical and metabolic overlap with the crop, their underground parasitism, their achlorophyllous nature, and hardly destructible seed bank, broomrape weeds are usually not controlled by management strategies designed for non-parasitic weeds. Instead, broomrape are in a current state of intensification and spread due to lack of broomrape-specific control programs, unconscious introduction to new areas and may be decline of …
Contribution of studies on suppressive soils to the identification of bacterial biocontrol agents and to the knowledge of their modes of action
2007
International audience
Indicateurs pour l'évaluation de l'impact de produits phytosanitaires sur la composante microbienne de la qualité biologique des sols
2011
National audience