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243篇 您的检索式:作者名="CHRISTIAN V"
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1Retrospective study on mixed neuroendocrine non-neuroendocrine neoplasms from five European centres显示文摘BACKGROUND Mixed neuroendocrine non-neuroendocrine neoplasm(MiNEN)is a rare diagnosis,mainly encountered in the gastro-entero-pancreatic tract.There is limited knowledge of its epidemiology,prognosis and biology,and the best management for affected patients is still to be defined.AIM To investigate clinical-pathological characteristics,treatment modalities and survival outcomes of a retrospective cohort of patients with a diagnosis of MiNEN.METHODS Consecutive patients with a histologically proven diagnosis of MiNEN were identified at 5 European centres.Patient data were retrospectively collected from medical records.Pathological samples were reviewed to ascertain compliance with the 2017 World Health Organisation definition of MiNEN.Tumour responses to systemic treatment were assessed according to the Response Evaluation Criteria in Solid Tumours 1.1.Kaplan-Meier analysis was applied to estimate survival outcomes.Associations between clinical-pathological characteristics and survival outcomes were explored using Log-rank test for equality of survivors functions(univariate)and Cox-regression analysis(multivariable).RESULTS Sixty-nine consecutive patients identified;Median age at diagnosis:64 years.Males:63.8%.Localised disease(curable):53.6%.Commonest sites of origin:colon-rectum(43.5%)and oesophagus/oesophagogastric junction(15.9%).The neuroendocrine component was;predominant in 58.6%,poorly differentiated in 86.3%,and large cell in 81.25%,of cases analysed.Most distant metastases analysed(73.4%)were occupied only by a poorly differentiated neuroendocrine component.Ninety-four percent of patients with localised disease underwent curative surgery;53%also received perioperative treatment,most often in line with protocols for adenocarcinomas from the same sites of origin.Chemotherapy was offered to most patients(68.1%)with advanced disease,and followed protocols for pure neuroendocrine carcinomas or adenocarcinomas in equal proportion.In localised cases,median recurrence free survival(RFS);14.0 months(95%CI:9.2-24.4),and median overall survival(OS):28.6 months(95%CI:18.3-41.1).On univariate analysis,receipt of perioperative treatment(vs surgery alone)did not improve RFS(P=0.375),or OS(P=0.240).In advanced cases,median progression free survival(PFS);5.6 months(95%CI:4.4-7.4),and median OS;9.0 months(95%CI:5.2-13.4).On univariate analysis,receipt of palliative active treatment(vs best supportive care)prolonged PFS and OS(both,P<0.001).CONCLUSION MiNEN is most commonly driven by a poorly differentiated neuroendocrine component,and has poor prognosis.Advances in its biological understanding are needed to identify effective treatments and improve patient outcomes.Melissa Frizziero Xin Wang Bipasha Chakrabarty Alexa Childs Tu V Luong Thomas Walter Mohid S Khan Meleri Morgan Adam Christian Mona Elshafie Tahir Shah Annamaria Minicozzi Wasat Mansoor Tim Meyer Angela Lamarca Richard A Hubner Juan W Valle Mairéad G McNamara 2019World Journal of Gastroenterology2019,25,39:13
2Machine-learned interatomic potentials by active learning:amorphous and liquid hafnium dioxide显示文摘We propose an active learning scheme for automatically sampling a minimum number of uncorrelated configurations for fitting the Gaussian Approximation Potential(GAP).Our active learning scheme consists of an unsupervised machine learning(ML)scheme coupled with a Bayesian optimization technique that evaluates the GAP model.We apply this scheme to a Hafnium dioxide(HfO2)dataset generated from a“melt-quench”ab initio molecular dynamics(AIMD)protocol.Our results show that the active learning scheme,with no prior knowledge of the dataset,is able to extract a configuration that reaches the required energy fit tolerance.Further,molecular dynamics(MD)simulations performed using this active learned GAP model on 6144 atom systems of amorphous and liquid state elucidate the structural properties of HfO2 with near ab initio precision and quench rates(i.e.,1.0 K/ps)not accessible via AIMD.The melt and amorphous X-ray structural factors generated from our simulation are in good agreement with experiment.In addition,the calculated diffusion constants are in good agreement with previous ab initio studies.Ganesh Sivaraman Anand Narayanan Krishnamoorthy Matthias Baur Christian Holm Marius Stan Gábor Csányi Chris Benmore Álvaro Vázquez-Mayagoitia 2020npj Computational Materials2020,,1:10
33D palaeogeographic reconstructions of the Phanerozoic versus sea-level and Sr-ratio variations显示文摘A full global geodynamical model over 600 million years(Ma) has been developed at the University of Lausanne during the past 20 years. We show herein how the 2D maps were converted into 3D(i.e., full hypsometry and bathymetry), using a heuristic-based approach. Although the synthetic topography may be viewed as relatively crude, it has the advantage of being applicable anywhere on the globe and at any geological time. The model allows estimating the sea-level changes throughout the Phanerozoic, with the possibility, for the first time, to flood accordingly continental areas. One of the most striking results is the good correlation with 'measured' sea-level changes, implying that long-term variations are predominantly tectonically-driven. Volumes of mountain relief are also estimated through time and compared with strontium isotopic ratio(Sr-ratio), commonly thought to reflect mountain belt erosion. The tectonic impact upon the general Sr-ratio trend is shown herein for the first time, although such influence was long been inferred.Christian Vérard Cyril Hochard Peter O.Baumgartner Gérard M.Stampfli 2015Journal of Palaeogeography2015,4,1:7
4Geodynamic evolution of the Earth over the Phanerozoic:Plate tectonic activity and palaeoclimatic indicators显示文摘During the last decades, numerous local reconstructions based on field geology were developed at the University of Lausanne(UNIL). Team members of the UNIL participated in the elaboration of a 600 Ma to present global plate tectonic model deeply rooted in geological data, controlled by geometric and kinematic constraints and coherent with forces acting at plate boundaries.In this paper, we compare values derived from the tectonic model(ages of oceanic floor, production and subduction rates, tectonic activity) with a combination of chemical proxies(namely CO2, 87Sr/86 Sr, glaciation evidence, and sea-level variations) known to be strongly influenced by tectonics. One of the outstanding results is the observation of an overall decreasing trend in the evolution of the global tectonic activity, mean oceanic ages and plate velocities over the whole Phanerozoic. We speculate that the decreasing trend reflects the global cooling of the Earth system. Additionally, the parallel between the tectonic activity and CO2 together with the extension of glaciations confirms the generally accepted idea of a primary control of CO2 on climate and highlights the link between plate tectonics and CO2 in a time scale greater than 107 yr. Last, the wide variations observed in the reconstructed sea-floor production rates are in contradiction with the steady-state model hypothesized by some.Christian Vérard Cyril Hochard Peter O.Baumgartner Gérard M.Stampfli 2015Journal of Palaeogeography2015,4,2:6
5How to perform gastrointestinal ultrasound: anatomy and normal findings显示文摘Gastrointestinal ultrasound is a practical, safe, cheap and reproducible diagnostic tool in inflammatorybowel disease gaining global prominence amongst clinicians. Understanding the embryological processes of the intestinal tract assists in the interpretation of abnormal sonographic findings. In general terms, the examination principally comprises interrogation of the colon, mesentery and small intestine using both lowfrequency and high-frequency probes. Interpretation of findings on GIUS includes assessment of bowel wall thickness, symmetry of this thickness, evidence of transmural changes, assessment of vascularity using Doppler imaging and assessment of other specific features including lymph nodes, mesentery and luminal motility. In addition to B-mode imaging, transperineal ultrasonography, elastography and contrast-enhanced ultrasonography are useful adjuncts. This supplement expands upon these features in more depth.Nathan S S Atkinson Robert V Bryant Yi Dong Christian Maaser Torsten Kucharzik Giovanni Maconi Anil K Asthana Michael Blaivas Adrian Goudie Odd Helge Gilja Dieter Nuernberg Dagmar Schreiber-Dietrich Christoph F Dietrich 2017World Journal of Gastroenterology2017,23,38:5
6Development, Processing and Applications Range of Magnesium Lithium Alloys显示文摘Haferkamp H. Niemeyer M. Boehm R. Holzkamp U. Jaschik Christian Kaese V 2000Materials Science Forum2000,,350:3
7Human acute myelogenous leukemia stem cells are rare and heterogeneous when assayed in NOD/SCID/IL2R[gamma]c-deficient mice显示文摘Sarry Jean-Emmanuel Murphy Kathleen Perry Robin Sanchez Patricia V Secreto Anthony Keefer Cathy Swider Cezary R Strzelecki Anne-Claire Cavelier Cindy Récher Christian Mansat-De Mas Véronique Delabesse Eric Danet-Desnoyers G Carroll Martin 2011Journal of Clinical Investigation2011,,1:2
8Toxicodynamic therapeutic drug monitoring of immunosuppressants: promises, reality, and challenges显示文摘Christians U Schmitz V Schoning W 2008Ther Drug Monit2008,30,2:1
9Lipolysis in dry-cured ham maturation 显示文摘Christian S Crostoma S Roberta V 2000Meat Science2000,,55:1
10Chemical modification of inulin, a valuable renewable resource, and its industrial applications 显示文摘Christian V S Alessia M 2001Biomacromolecules2001,2,:1
11Cleavage ofZearalenone by Trichosporon mycotoxinivorans to a novelnonestrogenic metabolite 显示文摘Elisavet V Christian H Rudolf M 2010Applied and EnvironmentalMicrobiology2010,76,7:1
12Abdominal obesi-ty is associated with microalbuminuria and an elevated cardio-vascular risk profile in patients with hypertension 显示文摘Martin T Jan Christian R Bobby V 2009VaseHealth Risk Manag2009,5,4:1
13Fuse for Power IGBT Converters显示文摘Son V Dong Christian Schaeffer Laure-Line Rouve 1994Industry Applications Society Annual Meeting1994,1994,:1
14Interleukin 17A is dis- pensable for myocarditis but essential for the progression to dilat- ed cardiomyopathy显示文摘Christian B Jobert G Monica V 2010Circ Res2010,106,10:1
15Prolonged Low- Dose Intravenous Thrombolysis in a Stroke Patient Wilh Dislal Basilar Thromhus 显示文摘Roland V Christian J Bodo K 2006Stroke (S0039 - 2499)2006,37,1:1
16Impact of enhanced and optimized coagulation on removal of organic matter and its biodegradable fraction in drinking water显示文摘 Kimberly B Eva L 2000Water Research2000,34,12:1
17Transition metal catalyzed oxidation of sulfur oxides atmospheric relevant processes and mechanisms显示文摘CHRISTIAN B RUDI V E 1995Chem Rev1995,95,1:1
18The potentiall role of gap Junction communieation between cumulus cells and bovine oocytes during in vitro maturation显示文摘Atef A Francois R Christian V 2005Mol Reprod Dev2005,71,3:1
19An ant colony optimization algorithm for DNA sequencing by hybridization显示文摘 MATEU Y V MARIA J B 2008Computers and Operations Research2008,35,11:1
20Microarray-based maps of copy number vari- ant regions in european and sub-saharan populations显示文摘Christian V I eo G 2010PLOS One2010,5,1:1
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