Search results for "IIf"
showing 10 items of 91 documents
Ambroisie à feuilles d'armoise : une enquête sur son passé
2006
National audience
Unsupervised clustering method for pattern recognition in IIF images
2017
Autoimmune diseases are a family of more than 80 chronic, and often disabling, illnesses that develop when underlying defects in the immune system lead the body to attack its own organs, tissues, and cells. Diagnosis of autoimmune pathologies is based on research and identification of antinuclear antibodies (ANA) through indirect immunofluorescence (IIF) method and is performed by analyzing patterns and fluorescence intensity. We propose here a method to automatically classify the centromere pattern based on the grouping of centromeres on the cells through a clustering K-means algorithm. The described method was tested on a public database (MIVIA). The results of the test showed an Accuracy…
Nitrate leaching in soil: Tracing the NO3− sources with the help of stable N and O isotopes
2007
Abstract Legumes increase the plant-available N pool in soil, but might also increase NO3− leaching to groundwater. To minimize NO3− leaching, N-release processes and the contribution of legumes to NO3− concentrations in soil must be known. Our objectives were (1) to quantify NO3−-N export to >0.3 m soil depth from three legume monocultures (Medicago x varia Martyn, Onobrychis viciifolia Scop., Lathyrus pratensis L.) and from three bare ground plots. Furthermore, we (2) tested if it is possible to apply a mixing model for NO3− in soil solution based on its dual isotope signals, and (3) estimated the contribution of legume mineralization to NO3− concentrations in soil solution under field co…
Crystal structure and computational study of 3,4-dihydroxy-3-hydroxymethyl-9-methyl-6-methylidene-3a, 4,5,6,6a, 9,9a, 9b-octahydroazuleno[4,5-b]furan…
2015
WOS: 000370762300147
A Noxious Weed Ambrosia artemisiifolia L. (Ragweed) as Sustainable Feedstock for Methane Production and Metals Immobilization
2023
Plants of the Ambrosia genus are invasive and cause many ecological problems, including the oppression of the growth of agricultural crops and native plants, land depletion, and the production of strong allergens. The use of weeds as a sustainable feedstock for biogas production, either methane or hydrogen, is a promising way to fulfill the energy needs of the current generation, eliminate the depletion of non-renewable carbon resources, and preserve the ecosystem degradation caused by invasive species impacts. A diversified microbial community was used as inoculum and Ambrosia artemisiifolia L. biomass as a substrate for anaerobic degradation and methane production. In this regard, the dev…
Los efectos de la adopción de las NIIF en los estados financieros: Evidencia para distintos contextos, Europa y Latinoamérica
2018
Sin duda, la adopción en distintas jurisdicciones de las Normas Internacionales de Información Financiera (NIIF), elaboradas por el International Accounting Standards Board (IASB), constituye una innovación histórica sin precedentes en la regulación contable (Ball, 2016) que ha generado contextos únicos para estudiar los efectos de la adopción del modelo IASB, y cómo éstos difieren según las características de cada país (De George, Li y Shivakumar, 2016). A pesar de que son numerosos los estudios realizados, los resultados de la literatura sobre los efectos de la adopción de esta normativa no son concluyentes, y todavía quedan muchas preguntas sin respuesta (ver Brüggemann, H…
Une envahissante dans le paysage : cas de l’ambroisie à feuilles d’armoise
2014
L’ambroisie à feuilles d’armoise (Ambrosia artemisiifolia L.) est une espèce annuelle envahissante introduite en France à la fin du XIXe siècle. Plante rudérale, tolérante à de nombreux stress, l’ambroisie se développe essentiellement dans les habitats perturbés. Les principaux milieux occupés sont les parcelles agricoles, les bords de route et les zones perturbées par les activités anthropiques (jachères industrielles, zone de dépôt de matériaux …). Les berges de rivière constituent le seul habitat naturel dans lequel l’ambroisie peut former d’importantes populations. La semence d’ambroisie n’a pas de structure particulière favorisant son invasion. Trop lourde pour être dispersée par le ve…
Predicting the potential global range of common ragweed (Ambrosia artemisiifolia) using biologically informed and correlative species distribution mo…
2012
National audience
Intestinal distribution and fecundity of two species ofDiplostomumparasites in definitive hosts
2005
This paper investigated the intestinal distribution and fecundity of 2 species ofDiplostomumparasites,D. spathaceumandD. pseudospathaceum, in 2 species of definitive hosts, herring gull (Larus argentatus) and common gull (L. canus), using both empirical field data and experimental infections. At the level of individual hosts, the parasite species occupied different parts within the intestine, but the fecundity of the worms, measured as the number of eggs in the uterus, did not differ between the parasite species except in wild common gulls. Interestingly, egg numbers in individual hosts were positively correlated between the parasite species suggesting that some birds provided better resour…
Estimation of the pollen and seed production of common ragweed in Europe
2007
International audience; Common ragweed (Ambrosia artemisiifolia L.) is an invasive weed of fieldcrops and human-disturbed habitats in Europe. As well as in its natural range (NorthAmerica), common ragweed is a threat to human health due to its abundant allergenicpollen release. Most studies have been focused on airborne pollen monitoring, but todate, no data have been available on precise individual plant pollen and seed productionrelated to plant traits growing in natural environment and on their corresponding sourceof variation. The aim of this study was to evaluate pollen and seed production of commonragweed plants in several populations in France. Seasonal pollen production per plantran…