Une tumeur du vagin à ne pas méconnaitre, l’adénocarcinome mésonephrique: à propos d’un cas et revue de la literature

L'adénocarcinome mésonéphrique du vagin est une tumeur maligne extrêmement rare avec uniquement trois cas publiés dans la littérature jusqu'à maintenant. Il dérive des reliquats embryonnaires des canaux mésonéphriques au niveau du vagin. Nous rapportons un cas d'adénocarcinome mésonéphrique du vagin survenant chez une femme de 50 ans, et révélé par une masse polyploïde du vagin. L'IRM a montré un envahissement du périnée et de la branche inférieure du pubis. L'étude anatomo-pathologique était en faveur d'un adénocarcinome mésonéphrique dont les cellules tumorales expriment la pancytokératine et le CD10. Elles ne sont pas marquées par les anticorps anti récepteurs ostrogéniques et progestatifs. La patiente a été adressée pour radiothérapie avant la prise en charge chirurgicale. Les auteurs soulignent à travers cette observation les aspects étiopathogéniques, histologiques et thérapeutiques de cette tumeur rare

Alfalfa genomic selection for different stress-prone growing regions

Alfalfa (Medicago sativa L.) selection for stress-prone regions has high priority for sustainable crop–livestock systems. This study assessed the genomic selection (GS) ability to predict alfalfa breeding values for drought-prone agricultural sites of Algeria, Morocco, and Argentina; managed-stress (MS) environments of Italy featuring moderate or intense drought; and one Tunisian site irrigated with moderately saline water. Additional aims were to investigate genotype × environment interaction (GEI) patterns and the effect on GS predictions of three single-nucleotide polymorphism (SNP) calling procedures, 12 statistical models that exclude or incorporate GEI, and allele dosage information. Our study included 127 genotypes from a Mediterranean reference population originated from three geographically contrasting populations, genotyped via genotyping-by-sequencing and phenotyped based on multi-year biomass dry matter yield of their dense-planted half-sib progenies. The GEI was very large, as shown by 27-fold greater additive genetic variance × environment interaction relative to the additive genetic variance and low genetic correlation for progeny yield responses across environments. The predictive ability of GS (using at least 37,969 SNP markers) exceeded 0.20 for moderate MS (representing Italian stress-prone sites) and the sites of Algeria and Argentina while being quite low for the Tunisian site and intense MS. Predictions of GS were complicated by rapid linkage disequilibrium decay. The weighted GBLUP model, GEI incorporation into GS models, and SNP calling based on a mock reference genome exhibited a predictive ability advantage for some environments. Our results support the specific breeding for each target region and suggest a positive role for GS in most regions when considering the challenges associated with phenotypic selection.EEA Santiago del EsteroFil: Annicchiarico, Paolo. Consiglio per la Ricerca in Agricoltura e l’Analisi dell’Economia Agraria. Centro di Ricerca Zootecnia e Acquacoltura; ItaliaFil: Nazzicari, Nelson. Consiglio per la Ricerca in Agricoltura e l’Analisi dell’Economia Agraria. Centro di Ricerca Zootecnia e Acquacoltura; ItaliaFil: Bouizgaren, Abdelaziz. Institut National de la Recherche Agronomique du Maroc. Centres Régionaux de Marrakech et de Rabat; MarruecosFil: Hayek, Taoufik. Institut des Régions Arides de Médenine; TunezFil: Laouar, Meriem. Ecole Nationale Supérieure Agronomique. Dép. de Productions Végétales. Laboratoire d’Amélioration Intégrative des Productions Végétales; ArgeliaFil: Cornacchione, Monica. Instituto Nacional de Tecnología Agropecuaria (INTA). Estación Experimental Agropecuaria Santiago del Estero; ArgentinaFil: Basigalup, Daniel Horacio. Instituto Nacional de Tecnología Agropecuaria (INTA). Estación Experimental Agropecuaria Manfredi. Grupo de Mejoramiento Genético de Alfalfa; ArgentinaFil: Monterrubio Martin, Cristina. Consiglio per la Ricerca in Agricoltura e l’Analisi dell’Economia Agraria. Centro di Ricerca Zootecnia e Acquacoltura; ItaliaFil: Brummer, E. Charles. University of California at Davies. Depeparment of Plant Sciences. Plant Breeding Center,; Estados UnidosFil: Pecetti, Luciano. Consiglio per la Ricerca in Agricoltura e l’Analisi dell’Economia Agraria. Centro di Ricerca Zootecnia e Acquacoltura; Itali

Modeling of Integrated Production Tomato under Multispan Greenhouse in Souss Massa region

Abstract: The renewal of greenhouse in Souss Massa region is a priority to improve the production of protected vegetable crops. The greenhouse structure is a complex system; it is the place of multiple interacting factors continuously in time and space. Aimed at controlling the integrated production under Multispan greenhouse, we need to consider all factors influencing volume and quality of commercial production. Among these factors, microclimate of structure mainly due to its architecture, its coverage material, its ventilation area and weather outside. In parallel with this study other factors will be studied, management of pests, diseases and management of production cost flow, aims to model the integrated production under greenhouse and to provide a convenient way of greenhouses decision making in protected production. This study was conducted in three separate unichapelle compartments 270m ² each. Inputs of fertilizer and water line were managed and controlled by a fertigation compact programmer. As climate data were collected through two weather stations installed in the greenhouse. The results of the first year showed the significant effect of the Multispan greenhouse microclimate on improving the production volume, the management of pests and diseases and economic inputs in comparison with the Canary greenhouse

Investigation of optical and electrical properties of p-nitro-benzylidenemalononitrile thin films for optoelectronic applications

International audienc

Magnetoresistance investigation in the mixed state of a high temperature superconductor

In this work, we analyze the behavior of the magnetoresistance R (H, T) of a high temperature superconductor YBa 2 Cu 3 O 7−δ thin film optimally doped. Measurements of the magnetoresistance were carried out in the mixed state for a magnetic field up to 14 T applied parallel to c − axis then parallel to ab − plane with a dc transport current of 100 and 500 nA, 0.1 and 0.3 mA perpendicular to the magnetic field direction in both cases. The obtained results show that the magnetoresistance is in a good agreement with the thermally assisted flux creep. However, the magnetoresistance in the flux flow regime cannot be described by the Barden-Stephen model which conjectures another origin of these results. In this sense, the quantum fluctuations of the order parameter is a good alternative to understanding the shape of the magnetoresistance. The comparison of the magnetoresistance of the two directions shows that R c ∥ ( H , T ) is larger than R a b ∥ ( H , T ) with anisotropy factor γ = R c ∥ / R a b ∥ depending on temperature and magnetic field. The irreversibility line H irr  (T) as well as H C2 (T) are determined and the first one is fitted with the phenomenological model H irr  (T) = H irr  (0) (1 − T/T o )  α where H irr  (0), T o and α are parameters obtained from the fit. The investigation of the scaling law allows us to prove that a crossover from 3D to 2D behavior is a feature of our sample which justifies the existence of the decoherence effect

The activation energy

It is reported in this paper on the thermally assisted flux flow in epitaxial YBa2Cu3O7-δ deposited by Laser ablation method on the SrTiO3 substrate. The resistivity measurements ρ (T, B) of the sample under various values of the magnetic field up to 14T in directions B∥ab-plane and B∥c-axis with a dc weak transport current density were investigated in order to determine the activation energy and then understand the vortex dynamic phenomena and therefore deduce the vortex phase diagram of this material. The apparent activation energy U0 (B) calculated using an Arrhenius relation. The measured results of the resistivity were then adjusted to the modified thermally assisted flux flow model in order to account for the temperature-field dependence of the activation energy U (T, B). The obtained values from the thermally assisted activation energy, exhibit a behavior similar to the one showed with the Arrhenius model, albeit larger than the apparent activation energy with ∼1.5 order on magnitude for both cases of the magnetic field directions. The vortex glass model was also used to obtain the vortex-glass transition temperature from the linear fitting of [d ln ρ/dT ] −1 plots. In the course of this work thanks to the resistivity measurements the upper critical magnetic field Hc2 (T), the irreversibility line Hirr (T) and the crossover field HCrossOver (T) were located. These three parameters allowed us to establish a phase diagram of the studied material where limits of each vortex phase are sketched in order to optimize its applicability as a practical high temperature superconductor used for diverse purposes

Genome-enabled and phenotypic selection of alfalfa for widely-diversified cropping environments

The decrease of rainfall amount due to climate change, and the reduction of irrigation water caused by growing water demand for non-agricultural uses, emphasize the importance of breeding novel alfalfa varieties that are more tolerant to drought under rain-fed cropping or modest supplemental irrigation, and more tolerant to salt to exploit low-quality, saline irrigation water. A sharp need for such improved germplasm is emerging in the Mediterranean basin, where alfalfa plays a key role for forage production. Drought-tolerant cultivars are needed also elsewhere, for example in Argentina, where they could allow to expand westward the alfalfa rain-fed cropping. Alfalfa typically features very low rates of genetic yield gain (Annicchiarico et al. 2015a), urging the development of cost-efficient marker-based selection. The multi-site yield testing of alfalfa varieties and landraces across countries of the western Mediterranean basin revealed outstanding genotype × environment (GE) interaction of cross-over type associated with three major types of target environments: i) rain-fed or irrigated environments featuring limited spring-summer water available and low salinity, ii) salt-stress environments, and iii) moisture-favorable environments (Annicchiarico et al. 2011). Eco-physiological research identified various mechanisms that contribute to specific-adaptation responses (Annicchiarico et al. 2013). Moderately wide cultivar adaptation may be desirable, given the wide year-to-year climatic variation of sites in this region. A Mediterranean reference population of alfalfa was developed from elite germplasm within the ERA-Net project REFORMA. A genotype training set was sorted out from it, to verify the ability of genomic selection (Heffner et al. 2009) to predict breeding values for biomass yield across a range of widely-diversified cropping environments. Genotype breeding values were estimated according to responses of their half-sib progenies, as required by the crop outbred system (Annicchiarico et al. 2015a). The genotyping of parent genotypes was carried out by Genotyping-by-Sequencing (Elshire et al. 2011) after optimizing for alfalfa some elements of its protocol (Annicchiarico et al. 2017). Concurrently, the project verified the ability of managed-stress environments of Italy to predict genotype yield responses in distant agricultural environments, following earlier work showing good ability to predict cultivar responses across agricultural environments of Italy (Annicchiarico and Piano 2005). This study aimed to provide an initial assessment of the ability of genomic selection to predict breeding values in each cropping environment and across stress environments, on the basis of preliminary yield data and GBS-generated data.EEA ManfrediFil: Annicchiarico, Paolo. Council for Agricultural Research and Economics. Research Centre for Fodder Crops and Dairy Productions; ItaliaFil: Bouizgaren, Abdelaziz. Institut National de la Recherche Agronomique du Maroc. Centres Régionaux de Marrakech et de Rabat; MarruecosFil: Hayek, Taoufik. Institut des Régions Arides de Médenine; TunezFil: Laouar, Meriem. Ecole Nationale Supérieure Agronomique; AlgerFil: Cornacchione, Monica. Instituto Nacional de Tecnología Agropecuaria (INTA). Estación Experimental Agropecuaria Santiago del Estero; ArgentinaFil: Basigalup, Daniel Horacio. Instituto Nacional de Tecnología Agropecuaria (INTA). Estación Experimental Agropecuaria Manfredi. Grupo de Mejoramiento Genético de Alfalfa; ArgentinaBrummer, E. Charles. University of Georgia. Crop and Soil Science Depeparment. Center for Applied Genetic Technologies; Estados UnidosFil: Pecetti, Luciano. Council for Agricultural Research and Economics. Research Centre for Fodder Crops and Dairy Productions; Itali

Irreversibility line and thermally activated flux flow in Micro-bridges of high-temperature superconductor

We have studied the electrical resistivity as a function of temperature in Micro-bridges of YBa2Cu3O7-δ deposited by laser ablation on the SrTiO3 substrate face, around superconducting transition region in different magnetic fields. The activation energy U0 was determined and discussed using the Arrhenius relation. The irreversibility line Birr and the upper critical field Bc2were obtained using 10% and 90% criteria of the normal-state resistivity value from ρ (T) curves. A phase diagram of the studied sample is constructed showing the Tg glass line and a very broad vortex-liquid phase regime