- A facile method for synthesis of nanostructured copper (II) oxide by precipitation – JOURNAL OF MATERIALS RESEARCH AND TECHNOLOGY-JMR&T
- A new approach for salts removal from crude glycerin coming from industrial biodiesel production unit – JOURNAL OF ENVIRONMENTAL CHEMICAL ENGINEERING
- A novel ultrahigh-molecular-weight polyethylene-based nanocomposite for contaminants adsorption in aqueous systems – MATERIALS LETTERS
- Acid Leaching-Based Synthesis of CdS Yellow Ceramic Pigment with Discarded Ni-Cd Batteries – MATERIALS RESEARCH
- Adsorption and desorption of eggplant peel anthocyanins on a synthetic layered silicate – JOURNAL OF FOOD ENGINEERING
- Alginate and carboxymethyl cellulose in monolayer and bilayer films as wound dressings: Effect of the polymer ratio – JOURNAL OF APPLIED POLYMER SCIENCE
- Ancoragem da prata em substratos cerâmicos para tratamento de água de consumo – CERÂMICA
- Application of adsorbents for oil/water emulsions treatment – BRAZILIAN JOURNAL OF DEVELOPMENT
- Área superficial específica e capacidade de troca catiônica como parâmetros para avaliar e prever o consumo de defloculante e viscosidade de barbotina – CERÂMICA INDUSTRIAL
- Asymmetric mullite membranes manufactured by phase-inversion tape casting from polymethylsiloxane and aluminum diacetate – JOURNAL OF MEMBRANE SCIENCE
- Benzyl butyrate esterification mediated by immobilized lipases: Evaluation of batch and fed-batch reactors to overcome lipase-acid deactivation – PROCESS BIOCHEMISTRY
- Benzyl propionate synthesis by fed-batch esterification using commercial immobilized and lyophilized Cal B lipase – BIOPROCESS AND BIOSYSTEMS ENGINEERING
- Biobased Ester 2-(10-Undecenoyloxy)ethyl Methacrylate as an Asymmetrical Diene Monomer in Thiol-Ene Polymerization – INDUSTRIAL & ENGINEERING CHEMISTRY RESEARCH
- Biodegradation of BTEX compounds from petrochemical wastewater: Kinetic and toxicity – JOURNAL OF WATER PROCESS ENGINEERING
- Bioenergetic potential of Ponkan peel waste (Citrus reticulata) pyrolysis by kinetic modelling and product characterization – BIOMASS & BIOENERGY
- Biological activity and chemical profile of Brazilian jackfruit seed extracts obtained by supercritical CO2 and low pressure techniques – JOURNAL OF SUPERCRITICAL FLUIDS
- Biomining of iron-containing nanoparticles from coal tailings – APPLIED MICROBIOLOGY AND BIOTECHNOLOGY
- Biomorphic microchanneled electrodes for enhanced water desalination through capacitive deionization – WATER SCIENCE AND TECHNOLOGY-WATER SUPPLY
- Biopolymer-Hydrophobic Drug Fibers and the Delivery Mechanisms for Sustained Release Applications – EUROPEAN POLYMER JOURNAL
- Biosynthesis and Functionalization of Bacterial Cellulose Membranes with Cerium Nitrate and Silver Nanoparticles – MATERIALS RESEARCH
- Biosynthesis of Iron Oxide Nanoparticles from Pyritic Tailings in a Stirred Tank Bioreactor – HYDROMETALLURGY
- Ceramic membranes applied to membrane distillation: A comprehensive review – INTERNATIONAL JOURNAL OF APPLIED CERAMIC TECHNOLOGY
- CFD Analysis of a Luminescent Solar Concentrator-Based Photomicroreactor (LSC-PM) with Feedforward Control Applied to the Synthesis of Chemicals under Fluctuating Light Intensity – CHEMICAL ENGINEERING RESEARCH & DESIGN
- Changes in the physico-chemical characteristics of a protein solution in the presence of magnetic field and the consequences on the ultrafiltration performance – JOURNAL OF FOOD ENGINEERING
- Characterization of pulp and paper mill waste for the production of waste-based cement – REVISTA INTERNACIONAL DE CONTAMINACION AMBIENTAL
- Chemical Composition, Antioxidant, Antimicrobial and Antidiabetic Potential of Philodendron Bipinnatifidum Schott ex Endl – JOURNAL OF FOOD ENGINEERING AND TECHNOLOGY
- Cold plasma treatment to improve the adhesion of cassava starch films onto PCL and PLA surface – COLLOIDS AND SURFACES A-PHYSICOCHEMICAL AND ENGINEERING ASPECTS
- Continuous production of eugenol esters using enzymatic packed-bed microreactors and an evaluation of the products as antifungal agents – FLAVOUR AND FRAGRANCE JOURNAL
- Copolymerization of Styrene and Cardanol from Cashew Nut Shell Liquid. Part I – Kinetic Modeling of Bulk Copolymerizations – MACROMOLECULAR REACTION ENGINEERING
- Copper-exchanged Y zeolites for gasoline deep-desulfurization – ADSORPTION-JOURNAL OF THE INTERNATIONAL ADSORPTION SOCIETY
- Covalently Binding of Bovine Serum Albumin to Unsaturated Poly(Globalide-Co-ε-Caprolactone) Nanoparticles by Thiol-Ene Reactions – MACROMOLECULAR BIOSCIENCE
- Crosslinking of Electrospun Fibres from Unsaturated Polyesters by Bis-Triazolinediones (TAD) – POLYMERS
- Curcumin cocrystals using supercritical fluid technology – JOURNAL OF SUPERCRITICAL FLUIDS
- Curcumin-nicotinamide cocrystallization with supercritical solvent (CSS): Synthesis, characterization and in vivo antinociceptive and anti-inflammatory activities – INDUSTRIAL CROPS AND PRODUCTS
- Desempenho balístico de estruturas multicamadas à base de alumina/epóxi – CERÂMICA
- Design guidelines for titania-silica-alumina ceramics with tuned anatase to rutile transformation – CERAMICS INTERNATIONAL
- Development of drug reservoirs based on nanofibers and capsules for epistaxis treatment – JOURNAL OF DRUG DELIVERY SCIENCE AND TECHNOLOGY
- Diethyldithiocarbamate loaded in beeswax-copaiba oil nanoparticles obtained by solventless double emulsion technique promote promastigote death in vitro – COLLOIDS AND SURFACES B-BIOINTERFACES
- Direct Contact Membrane Distillation Applied to Colored Reactive or Disperse Dye Solutions – CHEMICAL ENGINEERING & TECHNOLOGY
- Dissolution of adhesive resins present in plastic waste to recover polyolefin by sink-float separation processes – JOURNAL OF ENVIRONMENTAL MANAGEMENT
- Driving Immobilized Lipases as Biocatalysts: 10 Years State of the Art and Future Prospects – INDUSTRIAL & ENGINEERING CHEMISTRY RESEARCH
- Drying of Scenedesmus obliquus: Experimental and modeling study – ALGAL RESEARCH-BIOMASS BIOFUELS AND BIOPRODUCTS
- Early-stage materials selection based on embodied energy and carbon footprint – MATERIALS & DESIGN
- Ecological footprint of biomaterials for implant dentistry: is the metal-free practice an eco-friendly shift? – JOURNAL OF CLEANER PRODUCTION
- Effect of magnetic field on the Eversa® Transform 2.0 enzyme: Enzymatic activity and structural conformation – INTERNATIONAL JOURNAL OF BIOLOGICAL MACROMOLECULES
- Effect of soluble solids concentration on Neosartorya fischeri inactivation using UV-C light – INTERNATIONAL JOURNAL OF FOOD MICROBIOLOGY
- Effect of specimen geometry on kinetics of thermal decomposition of minerals in porous ceramic tiles – INTERNATIONAL JOURNAL OF APPLIED CERAMIC TECHNOLOGY
- Effect of the particle size range of construction and demolition waste on the fresh and hardened-state properties of fly ash-based geopolymer mortars with total replacement of sand – PROCESS SAFETY AND ENVIRONMENTAL PROTECTION
- Effects of by-products of fermentation of banana pseudostem on ethanol separation by evaporation – BIOTECHNOLOGY PROGRESS
- Effects of processing parameters on 3D structural ordering and optical properties of inverse opal photonic crystals produced by atomic layer deposition – INTERNATIONAL JOURNAL OF CERAMIC ENGINEERING & SCIENCE
- Encapsulation of clove oil in nanostructured lipid carriers from natural waxes: preparation, characterization and in vitro evaluation of the cholinesterase enzymes – COLLOIDS AND SURFACES A-PHYSICOCHEMICAL AND ENGINEERING ASPECTS
- Encapsulation of geranyl cinnamate in polycaprolactone nanoparticles – MATERIALS SCIENCE & ENGINEERING C-MATERIALS FOR BIOLOGICAL APPLICATIONS
- Energy and exergetic evaluation of the multicomponent separation of petrochemical naphtha in falling film distillation columns – BRAZILIAN JOURNAL OF CHEMICAL ENGINEERING
- Enhanced Electrochemical Performance of Nanocellulose/PPy·CuCl2 Electrodes for All-Cellulose-Based Supercapacitors – JOURNAL OF ELECTRONIC MATERIALS
- Enhancing Specific Capacitance and Cyclic Stability through Incorporation of MnO2 into BNC/PPy.CuCl2 Flexible Electrodes – ENERGY TECHNOLOGY
- Enzymatic degradation and detoxification of azo dye Congo red by a new laccase from Oudemansiella canarii – BIORESOURCE TECHNOLOGY
- Enzymatic Synthesis of a Diene Ester Monomer Derived from Renewable Resource – APPLIED BIOCHEMISTRY AND BIOTECHNOLOGY
- Enzyme-Catalyzed Production of FAME by Hydroesterification of Soybean Oil Using the Novel Soluble Lipase NS 40116 – APPLIED BIOCHEMISTRY AND BIOTECHNOLOGY
- Epoxidation of (R)-(+)-Limonene to 1,2-Limonene Oxide Mediated by Low-Cost Immobilized Candida antarctica Lipase Fraction B – INDUSTRIAL & ENGINEERING CHEMISTRY RESEARCH
- Evaluation of different reaction systems to obtain zeolite 4A via reverse microemulsion – MICROPOROUS AND MESOPOROUS MATERIALS
- Evaluation of Gaseous Emissions from Thermal Conversion of a Mixture of Solid Municipal Waste and Wood Chips in a Pilot-Scale Heat Generator – RENEWABLE ENERGY
- Evaluation of Second-Generation Ethanol Production from Mixtures of Banana Pseudostem, Peel and Rejected Fruit Using Aspen Hysys Simulation – INDUSTRIAL BIOTECHNOLOGY
- Evaluation of in vitro cytotoxicity of superparamagnetic poly(thioether-ester) nanoparticles on erythrocytes, non-tumor (NIH3T3), tumor (HeLa) cells and hyperthermia studies – JOURNAL OF BIOMATERIALS SCIENCE-POLYMER EDITION
- Extraction and characterization of oil of the pacu residue (Piaractus mesopotamicus) using ultrasonic technology – REVISTA IBERO-AMERICANA DE CIÊNCIAS AMBIENTAIS
- Falling film distillation column with heat transfer by means of a vapor chamber – part I: isothermal operation – CHEMICAL ENGINEERING COMMUNICATIONS
- Falling film distillation column with heat transfer by means of a vapor chamber. Part II: operation with a temperature profile – CHEMICAL ENGINEERING COMMUNICATIONS
- Fast microwave-assisted hydrothermal synthesis of TiNb2O7 nanoparticles – INTERNATIONAL JOURNAL OF CERAMIC ENGINEERING & SCIENCE
- Feeding strategies of methanol and lipase on eversa® transform-mediated hydroesterification for FAME production – CANADIAN JOURNAL OF CHEMICAL ENGINEERING
- Fire exposure behavior of epoxy reinforced with jute fiber applied to ceramic tiles for a ventilated facade system – MATERIALS RESEARCH
- Functionalized kaolin as support for endoglucanase immobilization – BIOPROCESS AND BIOSYSTEMS ENGINEERING
- Gas-solid flow in a ring-baffled CFB riser: Numerical and experimental analysis – POWDER TECHNOLOGY
- Green synthesis of zirconia nanoparticles based on Euclea natalensis plant extract: optimization of reaction conditions and evaluation of adsorptive properties – COLLOIDS AND SURFACES A-PHYSICOCHEMICAL AND ENGINEERING ASPECTS
- Harsh environment resistant – antibacterial zinc oxide/Polyetherimide electrospun composite scaffolds – MATERIALS SCIENCE & ENGINEERING C-MATERIALS FOR BIOLOGICAL APPLICATIONS
- High pressure phase equilibrium data for carbon dioxide, methyl methacrylate and poly (dimethylsiloxane) systems – JOURNAL OF SUPERCRITICAL FLUIDS
- High Pressure Phase Equilibrium Data for the Ternary System Containing Carbon Dioxide, Dichloromethane, and ε-Caprolactone – JOURNAL OF CHEMICAL AND ENGINEERING DATA
- Hydroxypropyl methylcellulose-TiO2 and gelatin-TiO2 nanocomposite films: Physicochemical and structural properties – INTERNATIONAL JOURNAL OF BIOLOGICAL MACROMOLECULES
- Immobilization of Heparin on Bacterial Nanocellulose Hydrogels Induces Tubulogenesis of Human Endothelial Cells – ANNALS OF ADVANCED BIOMEDICAL SCIENCES
- Immobilization of Lipase NS-40116 (Thermomyces lanuginosus) by Sol-Gel Technique Using Polyethyleneglycol as Additive – INDUSTRIAL BIOTECHNOLOGY
- Improving the soluble lipase-catalyzed biodiesel production through a two-step hydroesterification reaction system – APPLIED MICROBIOLOGY AND BIOTECHNOLOGY
- Industrial steel waste as an iron source to promote heterogeneous and homogeneous oxidation/reduction reactions – JOURNAL OF CLEANER PRODUCTION
- Influence of dye class on the comparison of direct contact and vacuum membrane distillation applied to remediation of dyeing wastewater – JOURNAL OF ENVIRONMENTAL SCIENCE AND HEALTH PART A-TOXIC/HAZARDOUS SUBSTANCES & ENVIRONMENTAL ENGINEERING
- In-situ synthesis of zeolites by geopolymerization of biomass fly ash and metakaolin – MATERIALS LETTERS
- Intensification of water reclamation from textile dyeing wastewater using thermal membrane technologies – Performance comparison of vacuum membrane distillation and thermopervaporation – CHEMICAL ENGINEERING AND PROCESSING
- Investigation of the bioenergy potential of microalgae Scenedesmus acuminatus by physicochemical characterization and kinetic analysis of pyrolysis – JOURNAL OF THERMAL ANALYSIS AND CALORIMETRY
- Kinetic identification of phenolic compounds and potential production of caffeic acid by Ganoderma lipsiense in solid-state fermentation – BIOPROCESS AND BIOSYSTEMS ENGINEERING
- Kinetic study under non-isothermal condition for silicon purification – TECNOLOGIA EM METALURGIA, MATERIAIS E MINERAÇÃO
- Kinetics of Dyeing in Continuous Circulation with Direct Dyes: Tencel Case – WORLD JOURNAL OF TEXTILE ENGINEERING AND TECHNOLOGY
- Kinetics of the Carbonation Reaction of Lithium Orthosilicate Using a Typical CO2 Concentration of Combustion Gases – MATERIALS RESEARCH
- Lab and pilot plant FAME production through enzyme-catalyzed reaction of low-cost feedstocks – BIORESOURCE TECHNOLOGY REPORTS
- Lipase-Catalyzed Esterification of Geraniol and Citronellol for the Synthesis of Terpenic Esters – APPLIED BIOCHEMISTRY AND BIOTECHNOLOGY
- Mathematical Modeling of the Transesterification Reaction by Finite Elements: Optimization of Kinetic Parameters Using the Simplex Sequential Method – JOURNAL OF THE BRAZILIAN CHEMICAL SOCIETY
- Microarchitecture and Radiological Flow Pattern of Cocoon-like Nanocellulose Hydrogels – MATERIALS RESEARCH-IBERO-AMERICAN JOURNAL OF MATERIALS
- Micronization of thymol by RESS and its larvicidal activity against Aedes aegypti (Diptera, Culicidae) – INDUSTRIAL CROPS AND PRODUCTS
- Mixing Effects in Continuous Free-Radical Solution Copolymerization Tank Reactors: II-Investigation of Micromixing Effects – MACROMOLECULAR REACTION ENGINEERING
- Modeling and experimental of mould disinfestation of soybean silos with ozone – OZONE-SCIENCE & ENGINEERING
- More random-walk than autotropism: A model-based study on how aerial hyphae of Rhizopus oligosporus grow in solid-state fermentation – BIOCHEMICAL ENGINEERING JOURNAL
- N-acetylcysteine side-chain functionalization of poly(globalide-co-ε-caprolactone) through thiol-ene reaction – MATERIALS SCIENCE & ENGINEERING C-MATERIALS FOR BIOLOGICAL APPLICATIONS
- New sustainable alternatives to reduce the production costs for surfactin 50 years after the discovery – APPLIED MICROBIOLOGY AND BIOTECHNOLOGY
- Ni-Y2O3-Al2O3 aerogel catalysts with high coke deposition resistance for syngas production by biogas reforming – INTERNATIONAL JOURNAL OF HYDROGEN ENERGY
- Nonlinear multivariable tracking control: application to an ethanol process – INTERNATIONAL JOURNAL OF AUTOMATION AND CONTROL
- Nonwoven membranes for tissue engineering: An overview of cartilage, epithelium, and bone regeneration – JOURNAL OF BIOMATERIALS SCIENCE, POLYMER EDITION
- Novel Porous Geopolymeric Formulation as Green Material Applied to the Recovery of Contaminated Effluent Aiming Environmental Protection – JOURNAL OF CLEANER PRODUCTION
- Optimization of pressure-swing distillation for anhydrous ethanol purification by the simulated annealing algorithm – BRAZILIAN JOURNAL OF CHEMICAL ENGINEERING
- Photo-immobilization of proteins on carbons – JOURNAL OF PHOTOCHEMISTRY AND PHOTOBIOLOGY B-BIOLOGY
- Plasma-modified TiO2/polyetherimide nanocomposite fibers for photocatalytic degradation of organic compounds – JOURNAL OF ENVIRONMENTAL CHEMICAL ENGINEERING
- Plastic optical fibres applied on the photocatalytic degradation of phenol with Ag2MoO4 and ß-Ag2 MoO4/Ag3PO4 under visible light – ENVIRONMENTAL TECHNOLOGY
- Potential application of Thermomyces lanuginosus lipase (TLL) immobilized on nonporous polystyrene particles – ENVIRONMENTAL PROGRESS & SUSTAINABLE ENERGY
- Potential of enzymatic process as an innovative technology to remove anticancer drugs in wastewater – APPLIED MICROBIOLOGY AND BIOTECHNOLOGY
- Precipitation of resveratrol-isoniazid and resveratrol-nicotinamide cocrystals by gas antisolvent – JOURNAL OF SUPERCRITICAL FLUIDS
- Predicting intrinsic permeability of a double porosity cellular ceramic using X-ray micro-tomography – CHEMICAL ENGINEERING TRANSACTIONS
- Preparation and characterization of 4-nitrochalcone-folic acid-poly(methyl methacrylate) nanocapsules and cytotoxic activity on HeLa and NIH3T3 cells – JOURNAL OF DRUG DELIVERY SCIENCE AND TECHNOLOGY
- Preparation of delafossite-type CuFeO2 powders by conventional and microwave-assisted hydrothermal routes for use as photo-Fenton catalysts – JOURNAL OF ENVIRONMENTAL CHEMICAL ENGINEERING
- Preparation of polyethylene-supported zero-valent iron buoyant catalyst and its performance for Ponceau 4R decolorization by photo-Fenton process – JOURNAL OF ENVIRONMENTAL CHEMICAL ENGINEERING
- Processing and properties of tape-cast alumina/zirconia laminates composites – JOURNAL OF THE EUROPEAN CERAMIC SOCIETY
- Production of active cassava starch films; effect of adding a biosurfactant or synthetic surfactant – REACTIVE & FUNCTIONAL POLYMERS
- Production of clove oil nanoemulsion with rapid and enhanced antimicrobial activity against gram positive and gram negative bacteria – JOURNAL OF FOOD PROCESS ENGINEERING
- Production of methyl esters by enzymatic hydroesterification of chicken fat industrial residue – BRAZILIAN JOURNAL OF CHEMICAL ENGINEERING
- Properties and Applications of Morinda citrifolia (Noni): A Review – COMPREHENSIVE REVIEWS IN FOOD SCIENCE AND FOOD SAFETY
- Raw leaves and leaf residues from the extraction of essential oils as biosorbents for metal removal – JOURNAL OF ENVIRONMENTAL CHEMICAL ENGINEERING
- Residual sugar from microalgae biomass harvested from phycoremediation of swine wastewater digestate – WATER SCIENCE AND TECHNOLOGY
- Rheological behavior of a silver aqueous nanofluid stabilized with aminosilane-based surfactant under confined flow – BRAZILIAN JOURNAL OF CHEMICAL ENGINEERING
- Separation of anthocyanins extracted from red cabbage by adsorption onto chitosan films – INTERNATIONAL JOURNAL OF BIOLOGICAL MACROMOLECULES
- Simple preparation of high concentration Nd3+-modified NaY zeolites with lower desorption activation energy of water – JOURNAL OF ALLOYS AND COMPOUNDS
- Simultaneous encapsulation of zinc oxide and octocrylene in poly (methyl methacrylate-co-styrene) nanoparticles obtained by miniemulsion polymerization for use in sunscreen formulations – COLLOIDS AND SURFACES A-PHYSICOCHEMICAL AND ENGINEERING ASPECTS
- Simultaneous hydrogel crosslinking and silver nanoparticle formation by using ionizing radiation to obtain antimicrobial hydrogels – RADIATION PHYSICS AND CHEMISTRY
- Simultaneous removal of nitrogen and organic carbon from swine wastewater using the pre-denitrification/nitrification process – REVISTA AMBIENTE E AGUA
- Stability Analysis of Stratified Rayleigh-Bénard-Poiseuille Convection. Part III: Interface Deformation – CHEMICAL ENGINEERING SCIENCE
- Study of Drying of Banana Pseudo-stem and Influence of Particle Sizes on Biomass Saccharification and Cellulosic Ethanol Production – BIOENERGY RESEARCH
- Syngas production by dry reforming of methane using lyophilized nickel catalysts – CHEMICAL ENGINEERING SCIENCE
- Synthesis of a green polyurethane foam from a biopolyol obtained by enzymatic glycerolysis and its use for immobilization of lipase NS-40116 – BIOPROCESS AND BIOSYSTEMS ENGINEERING
- Synthesis of eugenyl acetate through heterogeneous catalysis – JOURNAL OF ESSENTIAL OIL RESEARCH
- Synthesis of Fe3O4-Fe2O3@C Core-Shell Nanoparticles: Effect of Reactional Parameters on Structural and Magnetics Properties – JOURNAL OF INORGANIC AND ORGANOMETALLIC POLYMERS AND MATERIALS
- Tape casting of preceramic polymers toward advanced ceramics: A review – INTERNATIONAL JOURNAL OF CERAMIC ENGINEERING & SCIENCE
- Thermal degradation and flammability of TiO2-polyetherimide nanocomposite fibers – POLYMER BULLETIN
- Thermal investigation of plastic solid waste pyrolysis via the deconvolution technique using the asymmetric double sigmoidal function: Determination of the kinetic triplet, thermodynamic parameters, thermal lifetime and pyrolytic oil composition for clean energy recovery – ENERGY CONVERSION AND MANAGEMENT
- Tuning the photoactivity of TiO2 nanoarchitectures doped with cerium or neodymium and application to colour removal from wastewaters – ENVIRONMENTAL TECHNOLOGY
- UHMWPE/HA biocomposite compatibilized by organophilic montmorillonite: An evaluation of the mechanical-tribological properties and its hemocompatibility and performance in simulated blood fluid – MATERIALS SCIENCE & ENGINEERING C-MATERIALS FOR BIOLOGICAL APPLICATIONS
- Ultra-High-Molecular-Weight polyethylene-based nanocomposite for removal of tetracycline in aqueous systems – JOURNAL OF ENVIRONMENTAL CHEMICAL ENGINEERING
- Valorization of royal palm tree agroindustrial waste by isolating cellulose nanocrystals – CARBOHYDRATE POLYMERS
- Viscoelastic Properties and Creep-Fatigue Behavior of PA2200/HA Composites Manufactured by Selective Laser Sintering – JOURNAL OF MATERIALS SCIENCE AND ENGINEERING (A&B)
- Viscosity monitoring study of the kinetics of aqueous-medium N-vinylpyrrolidone free-radical polymerization – JOURNAL OF APPLIED POLYMER SCIENCE