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Characterization of the Omni-Processor Sewage Sludge Ash for Reuse as Construction Material

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Fluid Dynamics & Materials Processing 2022年第6期18卷 1581-1593页

作者： Prince Momar Gueye Siham Kamali-Bernard Dame Keinde Fabrice Bernard Vincent Sambou LE3PI of E S P-UCAD DakarSenegal LGCGM of insa of rennes RennesFrance

Omni Processors(OP)are machines which use sludge as a fuel to generate electricity and clean water,but create ash at the same *** the present study,fly ash and bottom ash are investigated as materials for potential reuse in the construction ***,the granular size,density and Blaine finesse are ***,the chemical composition and microstructure are obtained by means of X-ray fluorescence and Scanning Electron Microscopy-Energy Dispersive Spectroscopy(SEM-EDS),***,ashes reactivity is determined by two chemical methods(modified Chapelle test,bound water content R3)and a mechanical method(pozzolanic activity index).The characterization results indicate two material types:fly ash similar to cement and bottom ash similar to fine ***’s why the mortars mechanical strength with fly ash 0%-30%is better than that with bottom ash at the same *** ash slightly decreases the mechanical strength of mortars while bottom ash induces a much more significant decrease.

关键词： Characterization Omni-processor fly Ash bottom ash

Template-free nanostructured particle growth via a one-pot continuous gradient nanoprecipitation

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Aggregate

Aggregate 2024年第1期5卷 409-418页

作者： Xie Cheng Shuai Wang Julien Bernard François Ganachaud Xibo Yan School of Chemical Engineering and Technology Tianjin UniversityTianjinChina College of Food Science and Engineering Tianjin University of Science and TechnologyTianjinChina Universitéde Lyon CNRSUniversitéClaude Bernard Lyon 1INSA-LyonUniversitéJean MonnetUMR5223Ingénierie des Matériaux PolymèresVilleurbanne CedexFrance

Engineered nanoparticles have emerged as new types of materials for a wide range of applications from therapeutics to ***,fabricating nanomaterials presenting complex inner morphologies and shapes in a simple manner remains a great ***,we report the template-free one-pot continuous gradient nanoprecipitation of different types of non-compatible polymers to spontaneously form nanostructured *** continuous addition of antisolvent induces precipitation and(re)organization of polymer chains at the forming particle interface,ultimately and naturally developing complex inner morphologies and shapes while particle *** low-energy-cost bottom-up assembly approach applies to various functional polymers,possibly embedded with metal nanoparticles,for continuous growth into well-organized *** crosslinking of the particles and core removal allows both confirming the building process and leading to hollow or multivoid nanomaterials.

关键词： aggregation nanoprecipitation phase diagrams polymeric nanoparticles self-assembly

Generation,bonding and reactivity of transient zinc-substituted silylenes

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Science China Chemistry 2024年第4期67卷 1256-1262页

作者： Cheng Xu Thayalan Rajeshkumar Laurent Maron Xuebing Leng Yaofeng Chen State Key Laboratory of Organometallic Chemistry Shanghai Institute of Organic ChemistryUniversity of Chinese Academy of SciencesChinese Academy of SciencesShanghai 200032China Spin-X Institute School of Chemistry and Chemical EngineeringState Key Laboratory of Luminescent Materials and DevicesGuangdong-Hong Kong-Macao Joint Laboratory of Optoelectronic and Magnetic Functional MaterialsSouth China University of TechnologyGuangzhou 510641China LPCNO CNRS&INSAUniversitéPaul SabatierToulous 31077France

The metal-substituted silylenes are of high interest,as the theoretical studies indicated that the silylenes with electropositive substituents have a small ΔE_(S-T)(singlet-triplet energy gap)or even the ground-state ***,such compounds are highly unstable,and only two transient alkali metal-substituted silylenes M(^(t)Bu_(3)Si)Si:(M=Li,K)were generated by photoextrusion of the alkali metal-substituted silacyclopropenes and merely studied by spectroscopic method(EPR)at low temperature(14 to 50 K).Herein,we report the generation of transient zinc-substituted silylenes from zinc silacyclopropanyl complexes under very mild and convenient *** generated transient zinc-substituted silylenes are highly reactive and undergo intermolecular cycloaddition with alkenes for the synthesis of zinc-substituted Si-heterocyclic *** there is no substrate,the zinc-substituted silylenes attack the C-C bonds of the β-diketiminato ligands and break the C-C *** studies further highlight the silylene nature of the zinc-substituted silylene and a very small ΔE_(S-T)(4.4 kcal/mol).

关键词： zinc complex silylene C-C bond cleavage cycloaddition DFT calculations

Electrochemical Study of the Corrosion Inhibitory Capacity of Calcined Attapulgite in Reinforced Concrete Medium

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Advances in Materials Physics and Chemistry 2024年第5期14卷 76-94页

作者： Malang Bodian Kinda Hannawi Dame Keinde Modou Fall Aveline Darquennes Prince William Agbodjan Faculté des Sciences et Techniques D&#233partement de Chimie Universit&#233 Cheikh Anta Diop de Dakar (S&#233n&#233gal) Laboratoire de Chimie Physique Organique et d&#8217Analyse Environnementales (LCPOAE) Dakar Senegal Dé partement de G&#233nie Civil Universit&#233 de Rennes INSA Rennes Laboratoire de G&#233nie Civil et G&#233nie M&#233canique (LGCGM) Rennes France Dé partement de G&#233nie Civil Universit&#233 Cheikh Anta Diop Ecole Sup&#233rieure Polytechnique de Dakar (S&#233n&#233gal) Laboratoire de Mat&#233riaux de G&#233nie Civil (LMGC) Dakar Senegal

The durability of reinforced concrete structures is greatly influenced by the corrosion of the reinforcement. In addition to air pollution related to the repair of corroded structures, chloride ions are the main factors of corrosion of reinforced concrete structures. This study aims to valorize a clay inhibitor against reinforcement corrosion in reinforced concrete. This clay (Attapulgite) was incorporated into reinforced concretes at different percentages of substitution of calcined attapulgite (0%, 5% and 10%) to cement in the formulation. The corrosion inhibitory power of attapulgite is evaluated in reinforced concretes subjected to the action of chloride ions at different intervals in the NaCl solution (1 day, 21 days and 45 days) by electrochemical methods (zero current chronopotentiometry, polarization curves and electrochemical impedance spectroscopy). This study showed that in the presence of chloride ions, the composition based on 10% attapulgite has an appreciable inhibitory effect with an average inhibitory efficiency of 82%.

关键词： Attapulgite Electrochemical Methods Inhibitor Reinforced Concrete

强磁场下Cu−Co难混溶合金凝固过程中晶体取向和性能的调控

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Transactions of Nonferrous Metals Society of China 2024年第6期34卷 1878-1892页

作者：魏晨李金山闫育洁贺一轩 Eric BEAUGNON 王军西北工业大学凝固技术国家重点实验室西安710072 Univ.Grenoble Alpes INSA ToulouseUniv.Toulouse Paul SabatierEMFLCNRSLNCMI38000 GrenobleFrance

对Cu50Co50合金在不同磁场强度下进行非平衡凝固实验,研究富钴相的取向、显微组织演化和磁性能。结果表明,凝固后相分离的棒状富钴相可以实现排列形态,在5 T强磁场下富钴相的晶体取向为111平行磁场方向。然而,发生二次液−液相分离的富... 详细信息

对Cu50Co50合金在不同磁场强度下进行非平衡凝固实验,研究富钴相的取向、显微组织演化和磁性能。结果表明,凝固后相分离的棒状富钴相可以实现排列形态,在5 T强磁场下富钴相的晶体取向为111平行磁场方向。然而,发生二次液−液相分离的富铜相的取向没有受到HMF的显著影响。在0 T磁场下凝固的合金表现出近磁各向同性行为,而在5 T磁场下凝固的合金则表现出磁各向异性行为。合金的饱和磁化强度略有增加,矫顽力相应降低,这与富钴晶体的取向演化行为密切相关。

关键词：强磁场显微组织演化铜钴合金相分离磁性能

The neglect of nonnative orthopterans as potential invaders:A call for awareness

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Insect Science 2024年第4期31卷 994-1000页

作者： Anna K.Kulessa Paride Balzani Ismael Soto Antonín Kouba David Renault Ali Serhan Tarkan Phillip J.Haubrock Ruhr University Bochum Faculty of Biology and BiotechnologyBochumGermany Faculty of Biology University of Duisburg-EssenUniversitätsstraße 5EssenGermany Faculty of Fisheries and Protection of Waters South Bohemian Research Center of Aquaculture and Biodiversity of HydrocenosesUniversity of South Bohemia in CˇeskéBudeˇjoviceVodnˇanyCzech Republic University of rennes CNRSECOBIO(EcosystèmesBiodiversitéEvolution)UMRRennesFrance Faculty of Fisheries Department of Basic SciencesMu˘gla SıtkıKoçman UniversityMu˘glaTurkey Department of Life and Environmental Sciences Bournemouth UniversityPooleDorsetUK Faculty of Biology and Environmental Protection Department of Ecology and Vertebrate ZoologyUniversity ofŁodzŁodzPoland Department of River Ecology and Conservation Senckenberg Research Institute and Natural History Museum FrankfurtGelnhausenGermany Center for Applied Mathematics and Bioinformatics Gulf University for Science and TechnologyMubarak Al-AbdullahKuwait

Despite the potential ecological and economic impacts of invasive species,there is a dearth of data on the presence,impacts,and management implications of potentially invasive Orthoptera *** lack of research and inconsistent data,including risk screenings and impact assessments,is especially evident in ***,assessing the status,distribution,and potential threats of nonnative Orthoptera in Europe remains challenging,impeding the development of effective management *** address this gap,we call for increased efforts to collect and curate data on non-native and possibly invasive Orthoptera in *** efforts will improve our understanding of this order’s invasion dynamics,facilitate the identification of priority areas for conservation,and support the development of effective management policies and preventive measures.

关键词： costs cricket damages grasshopper impact research

Bending and Free Vibration Analysis of Porous-Functionally-Graded(PFG)Beams Resting on Elastic Foundations

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Fluid Dynamics & Materials Processing 2023年第4期19卷 1043-1054页

作者： Lazreg Hadji Fabrice Bernard Nafissa Zouatnia Laboratory of Geomatics and Sustainable Development University of TiaretTiaret14000Algeria Department of Mechanical Engineering University of TiaretTiaret14000Algeria insa rennes Laboratory of Civil Engineering and Mechanical EngineeringRennes35043France Department of Civil Engineering University of TiaretTiaret14000Algeria

The bending and free vibration of porous functionally graded(PFG)beams resting on elastic foundations are *** material features of the PFG beam are assumed to vary continuously through the thickness according to the volume fraction of *** foundation medium is also considered to be linear,homogeneous,and isotropic,and modeled using the Winkler-Pasternak *** hyperbolic shear deformation theory is applied for the kinematic relations,and the equations of motion are obtained using the Hamilton’s *** analytical solution is presented accordingly,assuming that the PFG beam is simply *** with the open literature are implemented to verify the validity of such a *** effects of the elastic foundations,porosity volume percentage and span-to-depth ratio are finally discussed in detail.

关键词： Bending free vibration porosity functionally graded material winkler-pasternak elastic foundation

Primitive to conventional geometry projection for efficient phonon transport calculations

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npj Computational Materials 2023年第1期9卷 365-371页

作者： Xun Li Simon Thébaud Lucas Lindsay Materials Science and Technology Division Oak Ridge National LaboratoryOak RidgeTNUSA Univ rennes INSA RennesCNRSInstitut FOTON-UMR 6082RennesFrance

The primitive Wigner-Seitz cell and corresponding first Brillouin zone(FBZ)are typically used in calculations of lattice vibrational and transport properties as they contain the smallest number of degrees of freedom and thus have the cheapest computational ***,in complex materials,the FBZ can take on irregular shapes where lattice symmetries are not ***,conventional cells(with more atoms and regular shapes)are often used to describe materials,though dynamical and transport calculations are more *** we discuss an efficient anharmonic lattice dynamic method that maps conventional cell dynamics to primitive cell dynamics based on translational *** symmetries have not been utilized in typical lattice dynamical *** leads to phase interference conditions that act like conserved quantum numbers and a conservation rule for phonon scattering that is hidden in conventional dynamics which significantly reduces the computational *** demonstrate this method for phonon transport in a variety of materials with inputs from first-principles calculations and attribute its efficiency to reduced scattering phase space and fewer summations in scattering matrix element calculations.

关键词： phonon conventional primitive

Epidemiology, Clinical Features and Antifungal Resistance Profile of Candida auris in Africa: Systematic Review

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Journal of Biosciences and Medicines 2024年第1期12卷 126-149页

作者： Isidore Wendkièta Yerbanga Seydou Nakanabo Diallo Toussaint Rouamba Delwendé Florence Ouedraogo Katrien Lagrou Rita Oladele Jean-Pierre Gangneux Olivier Denis Hector Rodriguez-Villalobos Isabel Montesinos Sanata Bamba Centre Hospitalier Universitaire Régional de Ouahigouya Ouahigouya Burkina Faso Ecole Doctorale des Sciences De la Santé Université Nazi Boni Bobo-Dioulasso Burkina Faso Centre Muraz/Institut National de Santé Publique Bobo-Dioulasso Burkina Faso Clinical Research Unit of Nanoro Institute for Research in Health Sciences National Center for Scientific and Technological Research Ouagadougou Burkina Faso Department of Microbiology Immunology and Transplantation KU Leuven Leuven Belgium and Department of Laboratory Medicine and National Reference Center for Mycosis Excellence Center for Medical Mycology (ECMM) University Hospitals Leuven Leuven Belgium College of Medicine University of Lagos Lagos Nigeria Univ rennes CHU Rennes Inserm Irset (Institut de recherche en santé environnement et travail) European ECMM Excellence Center in Medical Mycology Université de Rennes Rennes France Department of Microbiology CHU Namur site-Godinne Université Catholique de Louvain Yvoir Belgium Ecole de Santé Publique Université Libre de Bruxelles Brussels Belgium Department of Microbiology Cliniques Universitaires Saint-Luc—Université Catholique de Louvain Bruxelles Belgium Centre Hospitalier Universitaire Sour? Sanou Bobo-Dioulasso Burkina Faso

Candida auris since it discovery in 2009 is becoming a severe threat to human health due to its very quickly spread, its worldwide high resistance to systemic antifungal drugs. In resource-constrained settings where several conditions are met for its emergence and spread, this worrisome fungus could cause large hospital and/or community-based outbreaks. This review aimed to summarize the available data on C. auris in Africa focusing on its epidemiology and antifungal resistance profile. Major databases were searched for articles on the epidemiology and antifungal resistance profile of C. auris in Africa. Out of 2,521 articles identified 22 met the inclusion criteria. In Africa, nearly 89% of African countries have no published data on C. auris. The prevalence of C. auris in Africa was 8.74%. The case fatality rate of C. auris infection in Africa was 39.46%. The main C. auris risk factors reported in Africa were cardiovascular disease, renal failure, diabetes, HIV, recent intake of antimicrobial drugs, ICU admissions, surgery, hemodialysis, parenteral nutrition and indwelling devices. Four phylogenetic clades were reported in Africa, namely clades I, II, III and IV. Candida auris showed a pan-African very high resistance rate to fluconazole, moderate resistance to amphotericin B, and high susceptibility to echinocandins. Finally, C. auris clade-specific mutations were observed within the ERG2, ERG3, ERG9, ERG11, FKS1, TAC1b and MRR1 genes in Africa. This systematic review showed the presence of C. auris in the African continent and a worrying unavailability of data on this resilient fungus in most African countries.

关键词： Africa Antifungal Resistance Candida auris Clinical Features Phylogenetic Clades