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Low concentration isopropanol gas sensing properties of Ag nanoparticles decorated In_(2)O_(3) hollow spheres

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Journal of Advanced Ceramics 2022年第3期11卷 379-391页

作者： Chao ZHANG Yunchun HUAN Ying LI Yifan LUO marc DEBLIQUY College of Mechanical Engineering Yangzhou UniversityYangzhou225127China Materials Science Department University of MonsMons7000Belgium

In order to detect low concentrations of volatile organic compounds (VOCs) for the early diagnosis of lung cancer, sensors based on hollow spheres of In_(2)O_(3) were prepared through the soft template method. Ag nanoparticle decorated In_(2)O_(3) composites were synthesized via dipping and annealing. The microstructure, phase composition, element distribution, and state of Ag were analyzed by the scanning electron microscopy (SEM), X-ray diffraction (XRD), high-resolution transmission electron microscopy (HRTEM), and X-ray photoelectron spectroscopy (XPS). The gas sensing tests showed that Ag-In_(2)O_(3) sensors had the highest response to isopropanol at 300 ℃. The best response of Ag-In_(2)O_(3) composite sensor was 5.2, which had a significant improvement compared with only In_(2)O_(3). Moreover, the response and recovery time of Ag-In_(2)O_(3) composite sensor was significantly shortened. The improved sensing properties of Ag-In_(2)O_(3) composite sensor could be attributed to the Schottky barrier created at Ag-In_(2)O_(3) interface and catalytical effect of Ag.

关键词： Ag-In_(2)O_(3) hollow spheres isopropanol gas sensor

Aqueous Zn-based rechargeable batteries:Recent progress and future perspectives

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InfoMat 2022年第5期4卷 67-101页

作者： Mingjie Wu Gaixia Zhang Huaming Yang Xianhu Liu marc Dubois marc AGauthier Shuhui Sun Institut National de la Recherche Scientifique(INRS)-CentreEnergie Matériaux Télécommunications VarennesQuébecCanada Engineering Research Center of Nano-Geomaterials of Ministry of Education China University of GeosciencesWuhanChina Department of Inorganic Materials School of Minerals Processing and BioengineeringCentral South UniversityChangshaChina Key Laboratory of Materials Processing and Mold Ministry of EducationZhengzhou UniversityZhengzhouChina UniversitéClermont Auvergne CNRSSIGMA ClermontInstitut de Chimie de Clermont-FerrandClermont-FerrandFrance

Benefiting from the advantageous features of high safety,abundant reserves,low cost,and high energy density,aqueous Zn-based rechargeable batteries(AZBs)have received extensive attention as promising candidates for energy *** achieve high-performance AZBs with high reversibility and energy density,great efforts have been devoted to overcoming their drawbacks by focusing on the modification of electrode materials and *** on different cathode materials and aqueous electrolytes,the development of aqueous AZBs with different redox mechanisms are discussed in this review,including insertion/extraction chemistries(e.g.,Zn^(2+),alkali metal ion,H^(+),NH_(4)^(+),and so forth dissolution/deposition reactions(e.g.,MnO_(2)/Mn^(2+)),redox couples in flow batteries(e.g.,I_(3)/3I,Br_(2)/Br,and so forth),oxygen electrochemistry(e.g.,O_(2)/OH,O_(2)/O_(2)2),and carbon dioxide electrochemistry(e.g.,CO_(2)/CO,CO_(2)/HCOOH).In particular,the basic reaction mechanisms,issues with the Zn electrode,aqueous electrolytes,and cathode materials as well as their design strategies are systematically ***,the remaining challenges faced by AZBs are summarized,and perspectives for further investigations are proposed.

关键词： aqueous Zn-based rechargeable batteries hybrid battery Zn–air battery Zn–CO_(2)battery Zn-ion battery

Remote sensing-based estimation of rice yields using various models:A critical review

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Geo-Spatial Information Science 2021年第4期24卷 580-603页

作者： Daniel marc G dela Torre Jay Gao Cate Macinnis-Ng School of Environment University of AucklandAucklandNew Zealand School of Biological Sciences University of AucklandAucklandNew Zealand

Reliable estimation of region-wide rice yield is vital for food security and agricultural ***-scale models have increased our understanding of rice yield and its estimation under theoretical environmental ***,they offer little infor-mation on spatial variability effects on farm-scale *** Sensing(RS)is a useful tool to upscale yield estimates from farm scales to regional *** research used RS with rice models for reliable yield *** several countries start to operatio-nalize rice monitoring systems,it is needed to synthesize current literature to identify knowledge gaps,to improve estimation accuracies,and to optimize *** paper critically reviewed significant developments in using geospatial methods,imagery,and quantitative models to estimate rice ***,essential characteristics of rice were discussed as detected by optical and radar sensors,band selection,sensor configuration,spatial resolution,mapping methods,and biophysical variables of rice derivable from RS ***,various empirical,process-based,and semi-empirical models that used RS data for spatial estimation of yield were critically assessed-discussing how major types of models,RS platforms,data assimilation algorithms,canopy state variables,and RS variables can be integrated for yield ***,to overcome current constraints and to improve accuracies,several possibilities were suggested-adding new modeling modules,using alternative canopy variables,and adopting novel modeling *** rice yields are expected to decrease due to global warming,geospatial rice yield estimation techniques are indispensable tools for climate change *** studies should focus on resolving the current limitations of estimation by precise delineation of rice cultivars,by incorporating dynamic harvesting indices based on climatic drivers,using innovative modeling approaches with machine learning.

关键词： Process-based crop model data assimilation empirical model geospatial applications remote sensing rice yield mapping yield estimation

Thin Layer Models for Electromagnetism

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Communications in Computational Physics 2014年第6期16卷 213-238页

作者： marc Durufle Victor Peron Clair Poignard Team Magique-3D INRIA Bordeaux-Sud-OuestInstitut de Mathematiques de BordeauxCNRS UMR 5251&Universit´e de Bordeaux1351 cours de la Liberation33405 Talence CedexFrance Team Magique-3D INRIA Bordeaux-Sud-OuestLMAP CNRS UMR 5142&Universite de Pau et des Pays de l’AdourFrance. Team MC2 INRIA Bordeaux-Sud-OuestInstitut de Mathematiques de BordeauxCNRS UMR 5251&Universite de Bordeaux1351 cours de la Liberation33405 Talence CedexFrance.

We present a review on the accuracy of asymptotic models for the scattering problem of electromagnetic waves in domains with thin *** models appear as first order approximations of the electromagnetic *** are obtained thanks to a multiscale expansion of the exact solution with respect to the thickness of the thin layer,that makes possible to replace the thin layer by approximate *** present the advantages and the drawbacks of several approximations together with numerical validations and *** main motivation of this work concerns the computation of electromagnetic field in biological *** main difficulty to compute the local electric field lies in the thinness of the membrane and in the high contrast between the electrical conductivities of the cytoplasm and of the membrane,which provides a specific behavior of the electromagnetic field at low frequencies.

关键词： Asymptotics time-harmonic Maxwell’s equations finite element method edge elements.

Immune therapies in pancreatic ductal adenocarcinoma: Where are we now?

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World Journal of Gastroenterology 2018年第20期24卷 2137-2151页

作者： marc Hilmi Laurent Bartholin Cindy Neuzillet Service d'Oncologie Médicale H?pital Henri Mondor Assistance Publique-H?pitaux de Paris Université Paris Est Créteil Université de Lyon Université Claude Bernard Lyon 1 Inserm U1052 CNRS 5286Centre Léon Bérard Centre de Recherche en Cancérologie de Lyon

Pancreatic ductal adenocarcinoma(PDAC)is one of the deadliest cancers,mostly due to its resistance to *** these,checkpoint inhibitors(CPI)are inefficient when used as monotherapy,except in the case of a rare subset of tumors harboring microsatellite instability(<2%).This inefficacy mainly resides in the low immunogenicity and non-inflamed phenotype of *** abundant stroma generates a hypoxic microenvironment and drives the recruitment of immunosuppressive cells through cancerassociated-fibroblast activation and transforming growth factorβ*** strategies have recently been developed to overcome this immunosuppressive *** therapies involving CPI aim at increasing tumor immunogenicity and promoting the recruitment and activation of effector T *** studies are therefore exploring the association of CPI with vaccines,oncolytic viruses,MEK inhibitors,cytokine inhibitors,and hypoxia-and stroma-targeting *** T-cell transfer is also under ***,translational studies on tumor tissue and blood,prior to and during treatment may lead to the identification of biomarkers with predictive value for both clinical outcome and response to immunotherapy.

关键词： Drug therapy combination Immunology Hypoxia Checkpoint inhibitor Inflammation Pancreatic cancer Tumor-infiltrating lymphocyte Transforming growth factorβ Tumor microenvironment

Endoscopic management of complications of chronic pancreatitis

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World Journal of Gastroenterology 2013年第42期19卷 7308-7315页

作者： Jean-marc Dumonceau Carlos Macias-Gomez Division of Gastroenterology and Hepatology Geneva University Hospital1211 GenevaSwitzerland Gastrointestinal Endoscopy Unit Gastroenterology ServiceItalian Hospital1181 Buenos AiresArgentina

Pseudocysts and biliary obstructions will affect approximately one third of patients with chronic pancreatitis(CP).For CP-related,uncomplicated,pancreatic pseudocysts(PPC),endoscopy is the first-choice therapeutic *** advances have focused on endosonography-guided PPC transmural drainage,which tends to replace the conventional,duodenoscope-based coma immediately *** material is being tested to facilitate the endosonography-guided *** this review,the most adequate techniques depending on PPC characteristics are presented along with supporting *** CP-related biliary obstructions,endoscopy and surgery are valid therapeutic *** co-morbidities(e.g.,portal cavernoma)and expected patient compliance to repeat endoscopic procedures are important factors when selecting the most adapted *** should be reasonably ruled out before embarking on the endoscopic treatment of presumed CP-related biliary *** endoscopy,the gold standard technique consists of placing simultaneous,multiple,side-by-side,plastic stents for a oneyear *** covered self-expandable metal stents are challenging this method and have provided 50%mid-term success.

关键词： Biliary stricture Chronic pancreatitis Pseudocyst Endoscopic retrograde cholangio-pancreatography Endoscopic ultrasonography Stent

Improving health care usage in a very low birth weight population

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World Journal of Pediatrics 2015年第3期11卷 239-244页

作者： Wambui Waruingi Sai Iyer marc Collin Department of Pediatrics Division of NeonatologyCase Western ReserveMetrohealth Medical Center2500 Metrohealth DriveClevelandOH 44109USA Department of Pediatrics Cincinnati Children's Hospital Medical Center3333 Burnett avenueCincinnatiOH 45229USA

Background:Prematurity is the biggest contributor to admissions in the neonatal intensive care unit(NICU).The period following hospital discharge is a vital continuum for the very low birth weight(VLBW)infant The objective of this study was to assess the impact of a unique discharge and follow-up process on the outcomes of VLBW infants leaving the ***:All outpatient health care usage by VLBW infants born in the study year(cases)was retrospectively tracked through 12 months of age.A cohort of healthy newborn infants were matched by birthdate to each VLBW infant(controls)and similarly ***:In this study,there were 85 cases and 85 *** mean gestational age at birth for the cases was 29.1±2.7 weeks with a mean birth weight of 1079±263 *** of the controls was 38.9±13 weeks and 3202±447 *** 90%of both populations had Medicaid *** VLBW infants received care at the Special Care Developmental Follow-Up *** compared with the controls,VLBW infants discharged from the NICU made fewer acute,unscheduled visits to the Emergency Department or Urgent Care Clinic(2.3±2.5 vs.3.7±3.5;P=0.007)despite their high-risk medical and social *** growth pattern showed significant"catch-up"and was similar to the matched controls at the last scheduled visit for each ***:Outcomes including health care utilization in high-risk infants can be improved through meticulous discharge planning and follow-up measures that utilize existing hospital infrastructure to provide affordable comprehensive care.

关键词： health care usage special care clinic very low birth weight

On the Anisotropic Gaussian Velocity Closure for Inertial-Particle Laden Flows

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Communications in Computational Physics 2015年第1期17卷 1-46页

作者： Aymeric Vie Francois Doisneau marc Massot CNRS Laboratoire EM2C-UPR 288 Grande Voie des Vignes92295 Chatenay-MalabryFrance Ecole Centrale Paris Grande Voie des Vignes92295 Chatenay-MalabryFrance ONERA Chemin de la Huni`ere91120Palaiseau France Federation de Mathematiques de l’Ecole Centrale Paris FR CNRS 3487France Center For Turbulence Research Stanford University488Escondido MallStanford CA 94305-3035USA

The accurate simulation of disperse two-phase flows,where a discrete particulate condensed phase is transported by a carrier gas,is crucial for many applications;Eulerian approaches are well suited for high performance computations of such *** when the particles from the disperse phase have a significant inertia compared to the time scales of the flow,particle trajectory crossing(PTC)occurs *** particle velocity distribution at a given location can become *** properly account for such a phenomenon many Eulerian moment methods have been recently proposed in the *** resulting models hardly comply with a full set of desired criteria involving:1-ability to reproduce the physics of PTC,at least for a given range of particle inertia,2-well-posedness of the resulting set of PDEs on the chosen moments as well as guaranteed realizability,3-capability of the model to be associated with a high order realizable numerical scheme for the accurate resolution of particle segregation in turbulent *** purpose of the present contribution is to introduce a multi-variate Anisotropic Gaussian closure for such particulate flows,in the spirit of the closure that has been suggested for out-of-equilibrium gas dynamics and which satisfies the three *** novelty of the contribution is *** we derive the related moment system of conservation laws with source terms,and justify the use of such a model in the context of high Knudsen numbers,where collision operators play no *** exhibit the main features and advantages in terms of mathematical structure and *** a second order accurate and realizable MUSCL/HLL scheme is proposed and *** the behavior of the method for the description of PTC is thoroughly investigated and its ability to account accurately for inertial particulate flow dynamics in typical configurations is assessed.

关键词： Particulate flows kinetic theory moment method particle trajectory crossing

Dynamics of hepatic and intestinal cholesterol and bile acid pathways: The impact of the animal model of estrogen deficiency and exercise training

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World Journal of Hepatology 2016年第23期8卷 961-975页

作者： Jean-marc Lavoie Department of Kinesiology University of Montreal

Plasma cholesterol level is determined by a complex dynamics that involves transport lipoproteins which levels are tightly dependent on how the liver and the intestine regulate cholesterol and biliary acid metabolism. Regulation of cholesterol and biliary acids by the liver and the intestine is in turn coupled to a large array of enzymes and transporters that largely influence the inflow and the outflow of cholesterol and biliary acids through these organs. The activity of the key regulators of cholesterol and biliary acids may be influenced by several external factors such as pharmacological drugs and the nutritional status. In recent years, more information has been gathered about the impact of estrogens on regulation of cholesterol in the body. Exposure to high levels of estrogens has been reported to promote cholesterol gallstone formation and women are twice as likely as men to develop cholesterol gallstones. The impact of estrogen withdrawal, such as experienced by menopausal women, is therefore of importance and more information on how the absence of estrogens influence cholesterol regulation is started to come out, especially through the use of animal models. An interesting alternative to metabolic deterioration due to estrogen deficiency is exercise training. The present review is intended to summarize the present information that links key regulators of cholesterol and biliary acid pathways in liver and intestine to the absence of estrogens in an animal model and to discuss the potential role of exercise training as an alternative.

关键词： PSCK9 Low-density Lipoprotein receptor Very low-density Lipoprotein Sterol regulatory element binding proteins Ovariectomy High-density Lipoprotein Lipoproteins