221 research outputs found

    Effects of copper, zinc and selenium status on performance and health in commercial dairy and beef herds: retrospective study

    Get PDF
    A retrospective study using analysis of plasma copper and zinc, and erythrocyte glutathione peroxidase from 2 080 dairy and beef cow herds was conducted to evaluate the relationship between trace-element status and production, reproduction and health in cows and their calves. Classification of the herd status as deficient, marginal, low-adequate or high-adequate was based on the lower tercile of individual values. Odds ratios for each disorder in herds were calculated by multivariable stepwise logistic regression. Inadequate copper status was not associated with adult disorders, but was an important risk factor for poor calf performance or health. Selenium deficient status was associated with most studied disorders in cows, and both deficient and marginal herd status were strongly associated with poor health of calves, particularly with increased risks of myopathy and infectious diseases. Zinc insufficiency was strongly associated with low milk production and impaired locomotion in dairy herds, and was also associated with diarrhoea and poor growth in calves. Because a low-adequate status increased the risk of many disorders in adults and calves, we propose to classify herds as deficient and marginal when the lower terciles of plasma zinc concentration are below 12 and between 12 and 14 lmol/l respectively

    Relaxing order basis computation

    No full text
    International audienceThe computation of an order basis (also called sigma basis) is a fundamental tool for linear algebra with polynomial coefficients. Such a computation is one of the key ingredients to provide algorithms which reduce to polynomial matrices multiplication. This has been the case for column reduction or minimal nullspace basis of polynomial matrix over a field. In this poster, we are interested in the application of order basis to compute minimal matrix generators of a linear matrix sequence. In particular, we focus on the linear matrix sequence used in the Block Wiedemann algorithm

    Effets d’une supplĂ©mentation en iode et sĂ©lĂ©nium de la vache gestante sur les statuts en oligo-Ă©lĂ©ments et immunitaire du veau nouveau-nĂ©

    Get PDF
    Le sĂ©lĂ©nium est un anti-oxydant qui intervient dans la constitution des sĂ©lĂ©noenzymes (glutathion peroxydases, GSH-Px) et qui contrĂŽle l’activation des neutrophiles, macrophages et des lymphocytes B. En synergie avec les iodures, il participe Ă©galement Ă  la rĂ©gulation de la fonction thyroĂŻdienne. Etant donnĂ© l’efficacitĂ© du transfert transplacentaire de ces 2 oligo-Ă©lĂ©ments, l’objectif de cette Ă©tude Ă©tait d’évaluer le bĂ©nĂ©fice d’une supplĂ©mentation en iode et sĂ©lĂ©nium pendant la pĂ©riode du prĂ©partum chez les veaux nouveau-nĂ©s. Au total, 12 vaches gestantes issues d’un Ă©levage allaitant de la Haute-Vienne ont Ă©tĂ© rĂ©parties en 2 lots : un lot tĂ©moin de 5 vaches (lot A) et un lot de 7 vaches (lot B) supplĂ©mentĂ©es par voie orale par du sĂ©lĂ©nite de sodium (400 mg) et de l’iodure de calcium (1 200 mg) 20 Ă  35 jours avant la date prĂ©vue du part. Les activitĂ©s de la GSH-Px Ă©rythrocytaire (GSH-Pxe) et les concentrations plasmatiques en iode inorganique et en T4 totales ont Ă©tĂ© mesurĂ©es avant le traitement (J0) et le jour du vĂȘlage chez les femelles gestantes ainsi que chez les veaux Ă  la naissance et 24 h-36 h aprĂšs. Chez ces derniers, la protĂ©inĂ©mie et les concentrations plasmatiques en IgG ont aussi Ă©tĂ© dĂ©terminĂ©es. MalgrĂ© une situation de double carence en sĂ©lĂ©nium et en iode caractĂ©risĂ©e par des activitĂ©s GSH-Pxe et des concentrations plasmatiques en iode inorganique faibles conduisant Ă  une hypothyroĂŻdie sub-clinique chez 8 femelles gestantes, la supplĂ©mentation a permis d’amĂ©liorer le statut sĂ©lĂ©nique et de maintenir la fonction thyroĂŻdienne au vĂȘlage chez les mĂšres. Chez les veaux, bien qu’aucune diffĂ©rence significative n’ait pu ĂȘtre obtenue entre les 2 lots, les activitĂ©s de GSH-Px Ă  la naissance et 24 h-36 h aprĂšs ainsi que le statut immunitaire des veaux de 1 jour (reflĂ©tĂ© par la protĂ©inĂ©mie et la concentration plasmatique en IgG) ont Ă©tĂ© positivement corrĂ©lĂ©es avec le statut sĂ©lĂ©nique des mĂšres au vĂȘlage. Ces rĂ©sultats suggĂšrent que l’administration de sĂ©lĂ©nium et d’iode en prĂ©partum chez la vache allaitante peut augmenter les dĂ©fenses immunitaires des veaux en amĂ©liorant le statut sĂ©lĂ©nique maternel

    Experimental Demonstration of Real Time Receiver for FDMA PON

    Get PDF
    International audienceFDMA PON provides high aggregate capacity (20-40Gbps) without requiring the user modules to operate at such high data rate. In this paper, we present for the first time a real time implementation of a FDM receiver in FPGA 1Gbitps in transceiver modules for an ONU and OLT

    Les submersions de tempĂȘte de la nuit du 10 au 11 mars 2008 sur la cĂŽte d’AlbĂątre (Haute-Normandie, France) : dĂ©termination mĂ©tĂ©o-marine

    Get PDF
     Plus que l’analyse de l’impact morpho-sĂ©dimentaire sur les plages de galets haut-normandes de la tempĂȘte du 10 au 10 mars 2008, l’objet de cet article est de prĂ©senter les caractĂ©ristiques mĂ©tĂ©o-marines en cause et leurs interactions Ă©ventuelles dans le processus des submersions qui ont affectĂ© la cĂŽte d’AlbĂątre. Quelques Ă©lĂ©ments d’information qualitative concernant l’ajustement morpho-sĂ©dimentaire spĂ©cifique des plages de galets anthropisĂ©es Ă  ce type de forçage seront fournis. En effet, la tempĂȘte du 10 au 11 mars n’a pas fait l’objet de mesures morpho-sĂ©dimentaires spĂ©cifiques, mais visuellement, correspond en tout point Ă  ce qui a pu ĂȘtre mesurĂ© sur les plages haut-normandes lors de campagnes rĂ©centes rĂ©alisĂ©es avant et aprĂšs tempĂȘte. L’étude se concentre sur le secteur de Dieppe, qui bĂ©nĂ©ficie d’un marĂ©graphe (implantĂ© dans l’avant-port de Dieppe) et d’un poste de mesures mĂ©tĂ©orologiques situĂ© au sĂ©maphore de la Marine nationale, sous maintenance de MĂ©tĂ©o-France, et permettant notamment l’analyse de « donnĂ©es minute ». Cette Ă©tude rĂ©vĂšle que les facteurs d’ordre purement mĂ©tĂ©orologique qui ont abouti aux submersions de la nuit du 10 au 11 mars n’étaient pas de nature extrĂȘme, et que c’est la complexitĂ© des interactions en cause (conditions mĂ©tĂ©orologiques de surface et d’altitude, morpho-sĂ©dimentaires et surtout marĂ©graphiques et houlographiques), qui permet de comprendre l’ampleur de certaines inondations. Un « forçage » mĂ©tĂ©orologique plus violent sur ces interactions, tel que celui observĂ© le 17 dĂ©cembre 2004, qui eut peu de consĂ©quence en raison d’un faible coefficient de marĂ©e (71), pourrait aboutir Ă  des submersions beaucoup plus sĂ©vĂšres sur des sites urbanisĂ©s dont l’altitude et est parfois Ă©gale, voire infĂ©rieure Ă  celle des pleines mers de vive eau.More than the analysis of the morpho-sedimentary impact on Haute-Normandie gravel beaches during the storm of March 10th-11st 2008, the aim of this paper is to present meteorological and marine characteristics and their possible interactions in the process of storm surges which affected the « cĂŽte d’AlbĂątre ». Some elements of qualitative information concerning the specific morpho-sedimentary adjustment of these anthropized gravel beaches face to this meteorological forcing will be provided. Indeed, the storm of March 10th-11st 2008 was not subjected to specific morpho-sedimentary measurements but visually fits with the measurements taken on Haute-Normandie beaches during recent surveys executed before and after storm. This study focuses on the Dieppe area, which has a tide gauge (located in the outer port of Dieppe) and a meteorological measurement post, located at the national Navy semaphore, under the servicing of Meteo-France, and allowing analysis of « minute-data ». This study reveals that meteorological factors, ending in storm surges during the night of March 10th-11st, were not of extreme nature, and that it is the complexity of interactions (surface and altitude meteorological conditions, morpho-sedimentary and especially tidal and wave conditions) that allows an understanding of the extent of several floodings. A more violent meteorological « forcing » on these interactions, such as during December 17th 2004, that had few consequences because of low tidal coefficient (71), would end in much more important storm surges

    0304: How long should we keep a temporary pace maker after transcatheter aortic valve replacement (TAVR)

    Get PDF
    A temporary pace-maker (TPM) is often used after TAVR due to the risk of atrioventricular block (AVB) in the following days, related to progressive conduction system injuries. However guidelines are unclear as when to safely remove it. Between 2013 and 2014, 195 patients without previous permanent pacemaker, were prospectively followed after TAVR (69 Edwards Sapiens (ES) and 126 CoreValve (CV)). 47 had preoperative bundle branch block, 23 left (LBBB), 24 right sided (RBBB). Peri-operative high degree AVB was noted in 37 patients (20%). 24 were transient, less than 10mn and; 13 persisted at the end of the procedure and were implanted with a permanent pace-maker. New LBBB was observed in 55 patients (28%). In the post-operative period, 23 patients (13%) developped AVB (20 patients within 5 days, and 3 patients after 7 days) (4 ES and 19 CV). No new AV block had occurred at one month in the remaining population. Risk factors for late AVB were peri-operative transient AVB (40%), post-operative RBBB (30%), or LBBB (20%); preexistent RBBB and Corevalve model. Conversely 41 of the 42 patients without AVB or bundle branch block did not need temporary pacing in the post operative time. The only patient without any perioperative event who developed a late AV block at day 7 had a CV inserted in an old surgical valve. However, sinus dysfunction occurred in 2 patients treated with amiodarone for atrial fibrillation in the post operative period, needing temporary pacing. Conclusion: The use of TPM after TAVR is common for the management of delayed high degree AVB. The main risk factors are peri-operative AVB and post-operative BBB. Most of delayed AVB occur within 5 days. Later AVB preceded by prolonged PR interval and BBB should increase the length of TPM. However, in the absence of these factors TPM could be shortened.Abstract 0304 – Figure: Time occurence of AVB (CV=Corevalve, ES=Sapien
    • 

    corecore