108 research outputs found

    Diagnostic and predictive accuracy of anti-Mullerian hormone for ovarian function after chemotherapy in premenopausal women with early breast cancer

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    Funding: This work was undertaken in part in the MRC Centre for Reproductive Health, (supported by MRC grant MR/N022556/1).Purpose Accurate diagnosis and prediction of loss of ovarian function after chemotherapy for premenopausal women with early breast cancer (eBC) is important for future fertility and clinical decisions regarding the need for subsequent adjuvant ovarian suppression. We have investigated the value of anti-mullerian hormone (AMH) as serum biomarker for this. Methods AMH was measured in serial blood samples from 206 premenopausal women aged 40–45 years with eBC, before and at intervals after chemotherapy. The diagnostic accuracy of AMH for loss of ovarian function at 30 months after chemotherapy and the predictive value for that of AMH measurement at 6 months were analysed. Results Undetectable AMH showed a high diagnostic accuracy for absent ovarian function at 30 months with AUROC 0.89 (96% CI 0.84–0.94, P < 0.0001). PPV of undetectable AMH at 6 months for a menopausal estradiol level at 30 months was 0.77. In multivariate analysis age, pre-treatment AMH and FSH, and taxane treatment were significant predictors, and combined with AMH at 6 months, gave AUROC of 0.90 (95% CI 0.86–0.94), with PPV 0.79 for loss of ovarian function at 30 months. Validation by random forest models with 30% data retained gave similar results. Conclusions AMH is a reliable diagnostic test for lack of ovarian function after chemotherapy in women aged 40–45 with eBC. Early analysis of AMH after chemotherapy allows identification of women who will not recover ovarian function with good accuracy. These analyses will help inform treatment decisions regarding adjuvant endocrine therapy in women who were premenopausal before starting chemotherapy.Publisher PDFPeer reviewe

    Les marges, zones de récréation

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    Cet ouvrage n’est pas destiné qu’à des spécialistes: il intéressera également un public plus large, attentif aux enjeux européens et au rôle de l’Union européenne dans l’organisation des espaces mondiaux. Un Atlas qui contribue au débat sur l’ordre européen et mondial et laisse néanmoins toute liberté au lecteur, sans lui imposer de point de vue critique ou appréciateur sur le rôle de l’Europe dans la mondialisation

    Programming of endogenous and exogenous saccades: Evidence for a competitive integration model

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    this article. Correspondence concerning this article should be addressed to Richard Godijn, Department of Cognitive Psychology, Vrije Universiteit, Van Der Boechorststraat 1, 1081 BT Amsterdam, the Netherlands. E-mail: [email protected] Journal of Experimental Psychology: Copyright 2002 by the American Psychological Association, Inc. Human Perception and Performance 2002, Vol. 28, No. 5, 1039--1054 0096-1523/02/$5.00 DOI: 10.1037//0096-1523.28.5.1039 1039 inhibitory (Figure 1B), but when two nearby locations are activated, the combined activation results in a relatively high peak somewhere between the two locations (Figure 1C). In accordance with Trappenberg et al. (2001), the execution of a saccade is triggered when the activation at a specific location in the saccade map reaches threshold. Trappenberg et al. (2001) developed a neural-field model based on the principle of competitive integration of exogenous and endogenous signals in the SC. Their model produced activity patterns very similar to activity patterns of cells in the SC. Furthermore, the saccade latencies of the model fit well with a range of oculomotor effects, such as the remote distractor effect. The remote distractor effect (e.g., Walker, Deubel, Schneider, &amp; Findlay, 1997) refers to the finding that saccade latencies are longer when a target is presented simultaneously with a distractor but only when the distance between target and onset is relatively large. Furthermore, when the distractor is presented near the target, the eyes often land in between target and distractor (global effect or center-of-gravity effect; e.g., Coren &amp; Hoenig, 1972; Findlay, 1982). These findings are consistent with the lateral inhibition structure of the competitive integration model. However, it is important to note ..

    Long-Range, Polymer Chain Dynamics of a "Stiff" Polymer. Fluorescence from Poly(isobutylene-alt-maleic anhydride) with N-(1-Pyrenylmethyl)succinimide Groups

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    This document is the Accepted Manuscript version of a Published Work that appeared in final form in Macromolecules, copyright © American Chemical Society after peer review and technical editing by publisher. To access the final edited and published work see https://dx.doi.org/10.1021/acs.macromol.7b00527The steady-state fluorescence (SSF) spectra and time resolved fluorescence (TRF) decays of five poly(isobutylene-alt-maleic anhydride) copolymers (PIMA), randomly labeled with N-(1-pyrenyl methyl)succinimide groups (Py-PIMA), have been analyzed in order to describe their long-range, polymer chain dynamics (LRPCD) and to assess the stiffness of the PIMA backbone compared to that of a series of poly(alkyl methacrylate)s whose LRPCD had already been investigated. The SSF spectra, recorded under dilute concentration conditions where only intrachain events are important, show that the intensity ratio of pyrenyl excimer to pyrenyl monomer emission (i.e., (I-E/I-m)(SSF)) increases linearly with increasing pyrenyl content as a result of increased pyrenyl pyrenyl contacts and diffusive encounters. The slope of the straight line, m(I-E/I-M), that reflected the efficiency of pyrenyl excimer formation for Py-PIMA, was found to be 60% smaller than for even poly(octadecyl methacrylate) (PC18MA), a polymer exhibiting slow LRPCD due to its long, bulky side chain. Analyses of the SSF spectra allowed separation of the averaged behavior of five different pyrenyl species in the Py-PIMA polymers, although only two of them were reflected in the LRPCD of PIMA. In addition, the fluorescence decays of the pyrenyl monomer and excimer, when fitted globally according to the model free analysis (MFA), yielded the average rate constant (blob) of pyrenyl excimer formation that directly represents the LRPCD of Py-PIMA. After having conducted two tests that confirmed the validity of the parameters retrieved from the MFA of the TRF decays, (blob) for Py-PIMA was compared to (blob) of nine other polymers. The result of this comparison leads us to conclude that the PIMA backbone is extremely stiff in THF. This study demonstrates the ability of the MFA of fluorescence decays acquired from polymers randomly labeled with pyrenyl groups to characterize quantitatively the LRPCD of even extremely stiff polymers.Division of Chemistry: CHE-1502856Department of Education, Fujian ProvinceNatural Sciences and Engineering Research Council of CanadaNational Natural Science Foundation of China: 2117103

    Investigations on the vulnerability of advanced CMOS technologies to MGy dose environments

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    This paper investigates the TID sensitivity of silicon-based technologies at several MGy irradiation doses to evaluate their potential for high TID-hardened circuits. Such circuits will be used in several specific applications suc as safety systems of current or future nuclear power plants considering various radiation environments including normal and accidental operating conditions, high energy physics instruments, fusion experiments or deep space missions. Various device designs implemented in well established bulk silicon and Partially Depleted SOI technologies are studied here up to 3 MGy. Furthermore, new insights are given on the vulnerability of more advanced technologies including planar Fully Depleted SOI and multiple-gate SOI transistors at such high dose. Potential of tested technologies are compared and discussed for stand-alone integrated circuits

    Benchmark Workshop on selected stocks in the Western Waters in 2021 (WKWEST).

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    The goal of a benchmark is consensus agreement on an assessment methodology that is to be used in future update assessments. This assessment methodology can be an analytical assessment, but can also be non-analytical, for instance based on trends in an assessment or in a selected set of (survey) indicators, with or without forecasts. The result will be the 'best available' method that ICES advice will be based on. WKWEST 2021 dealt with the following stocks: Sardine (Sardina pilchardus) in Subarea 7 (southern Celtic Seas, and the English Channel); Pollack (Pollachius pollachius) in subareas 6-7 (Celtic Seas and the English Channel); Red gurnard (Chelidonichthys cuculus) in subareas 3–8 (Northeast Atlantic); Plaice (Pleuronectes platessa) in divisions 7.h–k (Celtic Sea South, southwest of Ireland); Sole (Solea solea) in divisions 8.c and 9.a (Cantabrian Sea and Atlantic Iberian waters)

    Commercial fishing patterns influence odontocete whale-longline interactions in the Southern Ocean

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    The emergence of longline fishing around the world has been concomitant with an increase in depredation-interactions by odontocete whales (removal of fish caught on hooks), resulting in substantial socio-economic and ecological impacts. The extent, trends and underlying mechanisms driving these interactions remain poorly known. Using long-term (2003–2017) datasets from seven major Patagonian toothfish (Dissostichus eleginoides) longline fisheries, this study assessed the levels and inter-annual trends of sperm whale (Physeter macrocephalus) and/or killer whale (Orcinus orca) interactions as proportions of fishing time (days) and fishing area (spatial cells). The role of fishing patterns in explaining between-fisheries variations of probabilities of odontocete interactions was investigated. While interaction levels remained globally stable since the early 2000s, they varied greatly between fisheries from 0 to >50% of the fishing days and area. Interaction probabilities were influenced by the seasonal concentration of fishing effort, size of fishing areas, density of vessels, their mobility and the depth at which they operated. The results suggest that between-fisheries variations of interaction probabilities are largely explained by the extent to which vessels provide whales with opportunities for interactions. Determining the natural distribution of whales will, therefore, allow fishers to implement better strategies of spatio-temporal avoidance of depredation

    Contrasting Management Techniques and Soil Types Affect Network Connections between Soil Properties and the Tulip Microbiome

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    Conventional agriculture relies on high inputs of chemical fertilisers and pesticides, leading to extensive soil damage. As a result, there has been a shift towards organic cultivation to ameliorate these negative effects. However, knowledge gaps remain concerning how different agricultural management regimes can alter soil properties, root-associated biota and relationships between them. We sampled soils and bulbs from clay and sand tulip fields with conventional, organic and hybrid (i.e., intermediate between conventional and organic) management regimes to determine effects on abiotic and biotic soil properties, tulip bulb microbiomes/biota and network connectivity between them. We found that soil abiotic properties were not driven by management. However, soil microbial community composition was determined by interactions between soil type and management. Specifically, conventional management created more heterogeneous and homogenous bacterial and fungal soil communities, respectively, across soil types, while organic and hybrid soil communities differed between soil types. A partial least squares path model revealed that across all fields, soil properties determined the composition of tulip bulb biota (i.e., microorganisms, nematodes), while management techniques did not play a significant role, neither directly nor indirectly. Network analyses revealed more modular (i.e., independent) nodes of association in fields with sandy soils. Specifically, management techniques (i.e., chemical usage, ploughing depth, diminished crop rotation) formed a cluster that was independent from most soil (abiotic and biotic) and bulb biotic properties, while clay field networks showed the opposite. Our results indicate that conventional agriculture can homogenise soil microbial communities, with potential impacts on soil function and buffering capacity to stress. Increased modularity between soil properties, management techniques and tulip bulb biota in sand fields could mean increased resistance to disturbance and abiotic and biotic stress as a result of higher functional redundancy. Interactions between agricultural management regime and soil type must be taken into consideration when determining long-term influences on crop microbiome/biota associations and the potential effects on soil health and productivity
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