Search results for "Reactive"

showing 10 items of 1469 documents

Exhalation of ethylene oxide by rats on exposure to ethylene.

1983

Abstract When rats are exposed to ethylene in a closed desiccator jar chamber, the rate of metabolic elimination of the compound is influenced by pretreatment with Aroclor 1254 (metabolism increased) and diethyldithiocarbamate (metabolism inhibited). Biotransformation of ethylene leads to ethylene oxide as reactive intermediate. This is exhaled and can be quantitated in the gas phase of the system.

Ethylene OxideMaleChromatographyEthyleneEthylene oxideRespirationReactive intermediateExhalationRats Inbred StrainsGeneral MedicineMetabolismEnvironmental exposureEnvironmental ExposureEthylenesRatschemistry.chemical_compoundchemistryBiotransformationBiochemistryAnimalsDesiccatorBiotransformationMutation research
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Reactive melt blending of functionalized-MW/CNTs with polyolefin

2012

Adding nanotube adding into a polymeric matrix leads to the formulation of nanocomposites with enhanced macroscopical performances, and, moreover, the use of functionalized MW-CNTs leads to the nanocomposite formulation with even better properties. Furthermore, the reactive melt blending can be considered as a powerful processing method, i.e. reasonably simple and ecologically friendly, in order to formulate polymer based nanocomposite with good performance. In this work, the reactive melt blending between an ethylene-acrylic acid co-polymer, bis-oxazoline and functionalized MW-CNTs was performed and the rheological properties of the formulated systems were investigated.

Ethylene-acrylic acid co-polymerchemistry.chemical_classificationNanotubeMaterials scienceNanocompositePolymeric matrixPolymerBis-oxazolineMelt blendingProcessing methodsPolyolefinFunctionalized-MW/CNTReactive melt blendingchemistry.chemical_compoundchemistryComposite materialAIP Conference Proceedings
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Development of a combined solver to model transport and chemical reactions in catalytic wall-flow filters

2017

Abstract In this work, we develop a non-isothermal model for diesel particulate filters including exothermic and competing chemical reactions. We begin with an isothermal, single-reaction model and we gradually increase its complexity. By comparing various models, we aim at establishing the minimum degree of complexity required to effectively model the system under investigation. Based on the numerical simulations, we conclude that isothermal models are adequate only if the temperature of the catalyst is, at all times, completely below or completely above a critical temperature. However, if the goal is to predict the critical temperature, only non-isothermal models should be used. The resul…

Exothermic reactionDiesel particulate filterWork (thermodynamics)Diesel particulate filterChemistryGeneral Chemical EngineeringFlow (psychology)Heat and mass transferMechanical engineeringReactive flow02 engineering and technologyGeneral ChemistryMechanicsSolver010402 general chemistry021001 nanoscience & nanotechnology01 natural sciencesChemical reactionIsothermal processCatalytic converter0104 chemical sciencesMass transfer0210 nano-technologyCFD
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ASSOCIATION OF ELEVATED FIBRINOGEN AND C-REACTIVE PROTEIN LEVELS WITH CAROTID LESIONS IN PATIENTS WITH EARLY ONSET OF HYPERTENSION OR TYPE II DIABETE…

2006

FIBRINOGEN C-REACTIVE PROTEINCAROTID LESIONS
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A Survey on Proxy Mobile IPv6 Handover

2016

[EN] As wireless technologies have been improving in recent years, a mobility management mechanism is required to provide seamless and ubiquitous mobility for end users who are roaming among points of attachment in wireless networks. Thus, Mobile IPv6 was developed by the Internet Engineering Task Force (IETF) to support the mobility service. However, Mobile IPv6 is unable to fulfill the requirements of real-time applications, such as video streaming service and voice over IP service, due to its high handover (HO) latency. To address this problem, Proxy Mobile IPv6 (PMIPv6) has been introduced by the IETF. In PMIPv6, which is a network-based approach, the serving network controls mobility m…

Fast localized Proxy Mobile IPv6 (PMIPv6) handover (HO) procedureEngineeringMobility modelComputer Networks and CommunicationsReactive mode0211 other engineering and technologiesMobile computing02 engineering and technologyPMIPv6 with partial bicastingPMIPv60202 electrical engineering electronic engineering information engineeringElectrical and Electronic EngineeringProxy Mobile IPv6Mobility management021103 operations researchbusiness.industryWireless networkComputerSystemsOrganization_COMPUTER-COMMUNICATIONNETWORKSPredictive modeHO in PMIPv6020206 networking & telecommunicationsINGENIERIA TELEMATICAComputer Science ApplicationsHandoverControl and Systems EngineeringMobile IPRoamingbusinessTelecommunicationsInformation SystemsComputer networkIEEE Systems Journal
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In-vitro antioxidant capacity and cytoprotective/cytotoxic effects upon Caco-2 cells of red tilapia (Oreochromis spp.) viscera hydrolysates.

2019

Abstract The antioxidant capacity of red tilapia viscera hydrolysates (RTVH) with different degrees of hydrolysis (DH) as well as their ultrafiltration membrane fractions, were analyzed using different chemical assays. Their protective effects against oxidative stress were evaluated using H2O2-stressed human intestinal differentiated Caco-2. The highest antioxidant capacity was obtained with a DH of 42.5% (RTVH-A) and its

Fish Proteinsfood.ingredient030309 nutrition & dieteticsCell SurvivalProtein HydrolysatesUltrafiltrationmedicine.disease_causeHydrolysateAntioxidants03 medical and health sciencesHydrolysis0404 agricultural biotechnologyfoodFunctional FoodmedicineAnimalsHumansFood science0303 health sciencesbiologyChemistryHydrolysisCell CycleTilapia04 agricultural and veterinary sciencesbiology.organism_classification040401 food scienceGlutathioneIn vitroIntestinesOreochromisOxidative StressVisceraCaco-2Caco-2 CellsReactive Oxygen SpeciesOxidative stressFood ScienceTilapiaFood research international (Ottawa, Ont.)
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The impact of dehydration rate on the production and cellular location of reactive oxygen species in an aquatic moss.

2012

† Background and Aims The aquatic moss Fontinalis antipyretica requires a slow rate of dehydration to survive a desiccation event. The present work examined whether differences in the dehydration rate resulted in corresponding differences in the production of reactive oxygen species (ROS) and therefore in the amount of cell damage. † Methods Intracellular ROS production by the aquatic moss was assessed with confocal laser microscopy and the ROS-specific chemical probe 2,7-dichlorodihydrofluorescein diacetate. The production of hydrogen peroxide was also quantified and its cellular location was assessed. † Key Results The rehydration of slowly dried cells was associated with lower ROS produc…

Fontinalis antipyreticaTime FactorsCell Survivalved/biology.organism_classification_rank.specieschemistry.chemical_elementPlant ScienceBiologyOxygenchemistry.chemical_compoundmedicineDehydrationDesiccationHydrogen peroxideCell damagechemistry.chemical_classificationReactive oxygen speciesMicroscopy ConfocalDehydrationved/biologyHydrogen PeroxideOriginal Articlesmedicine.diseaseBryopsidaRespiratory burstOxygenPlant LeavesOxidative StresschemistryBiochemistryBiophysicsReactive Oxygen SpeciesIntracellularAnnals of botany
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Direct measurement of NO<sub>3</sub> radical reactivity in a boreal forest

2018

Abstract. We present the first direct measurements of NO3 reactivity (or inverse lifetime, s−1) in the Finnish boreal forest. The data were obtained during the IBAIRN campaign (Influence of Biosphere-Atmosphere Interactions on the Reactive Nitrogen budget) which took place in Hyytiälä, Finland during the summer/autumn transition in September 2016. The NO3 reactivity was generally very high with a maximum value of 0.94 s−1 and displayed a strong diel variation with a campaign-averaged nighttime mean value of 0.11 s−1 compared to a daytime value of 0.04 s−1. The highest nighttime NO3 reactivity was accompanied by major depletion of canopy level ozone and was associated with strong temperature…

Forest floorAtmospheric ScienceDaytimeOzone010504 meteorology & atmospheric sciencesReactive nitrogen15. Life on land010501 environmental sciencesSeasonalityAtmospheric sciencesmedicine.disease01 natural sciencesTrace gaschemistry.chemical_compoundchemistry13. Climate actionAtmospheric chemistrymedicineEnvironmental scienceReactivity (chemistry)0105 earth and related environmental sciencesAtmospheric Chemistry and Physics
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CTR: A calculus of timed refinement

1995

This paper presents CTR — a process algebraic framework for loose specification of time quantity sensitive operational behaviour of reactive systems. CTR terms are provided both with operational and specification semantics (via the notion of specification refinement). Besides the intuitive justification of appropriateness of the refinement notion, a preservation theorem is proved for a timed variant of Hennessy-Milner logic. A comparison of CTR with the related formalism of Timed Modal Specifications, and with the timed process calculi TCCS due to Wang is given. Some pragmatics of the application of CTR is sketched on a critical resource access example.

Formalism (philosophy of mathematics)ComputingMethodologies_PATTERNRECOGNITIONModalComputer scienceProgramming languageProcess calculusCalculusMutual exclusionAlgebraic numberPragmaticscomputer.software_genreReactive systemcomputer
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The Important Role of the Nuclearity, Rigidity, and Solubility of Phosphane Ligands in the Biological Activity of Gold(I) Complexes

2018

A series of 4-ethynylaniline gold(I) complexes containing monophosphane (1,3,5-triaza-7-phosphaadamantane (pta; 2), 3,7-diacetyl-1,3,7-triaza-5-phosphabicyclo[3.3.1]nonane (3), and PR3 , with R=naphthyl (4), phenyl (5), and ethyl (6)) and diphosphane (bis(diphenylphosphino)acetylene (dppa; 7), trans-1,2-bis(diphenylphosphino)ethene (dppet; 8), 1,2-bis(diphenylphosphino)ethane (dppe; 9), and 1,3-bis(diphenylphosphino)propane (dppp; 10)) ligands have been synthesized and their efficiency against tumor cells evaluated. The cytotoxicity of complexes 2-10 was evaluated in human colorectal (HCT116) and ovarian (A2780) carcinoma as well as in normal human fibroblasts. All the complexes showed a hi…

FosfinaMolecular ConformationOrCrystal structureCrystallography X-RayLigandsMedicinal chemistry01 natural scienceskultachemistry.chemical_compoundCoordination ComplexesDiphosphaneSolubilityCytotoxicityta116bcl-2-Associated X ProteinMembrane Potential Mitochondrialbioaktiiviset yhdisteetBiological activitybiological activity of gold(I) complexesAcetyleneProto-Oncogene Proteins c-bcl-2rigidityCompostos d'ornuclearityPhosphineCell SurvivalPhosphinesAntineoplastic Agentsphosphane ligands010402 general chemistryCatalysisCell LineStructure-Activity RelationshipMoleculeHumans010405 organic chemistrysolubilityOrganic ChemistryGeneral ChemistrykompleksiyhdisteetHCT116 Cells0104 chemical sciencesLligandschemistryQuantum TheoryGoldNonaneReactive Oxygen SpeciesGold compoundsChemistry: A European Journal
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