Search results for "Microporous membranes"

showing 3 items of 3 documents

Protein diffusion through charged nanopores with different radii at low ionic strength

2014

[EN] The diffusion of two similar molecular weight proteins, bovine serum albumin (BSA) and bovine haemoglobin (BHb), through nanoporous charged membranes with a wide range of pore radii is studied at low ionic strength. The effects of the solution pH and the membrane pore diameter on the pore permeability allow quantifying the electrostatic interaction between the chargedpore and the protein. Because of the large screening Debye length, both surface and bulk diffusion occur simultaneously. By increasing the pore diameter, the permeability tends to the bulk self-diffusion coefficient for each protein. By decreasing the pore diameter, the charges on the pore surface electrostatically hinder …

Self assembled monolayersUltrafiltration membranesSurface PropertiesPHStatic ElectricityAnalytical chemistryGeneral Physics and AstronomyDiffusionHemoglobinsNanoporessymbols.namesakeProtein purificationAnimalsHemoglobinParticle SizePhysical and Theoretical ChemistryBovine serum albuminMolecular transportAqueous solutionsSerum AlbuminDebye lengthChemical PhysicsbiologyNanoporousChemistryOsmolar ConcentrationMicroporous membranesLight scatteringSerum Albumin BovineBovineHydrogen-Ion ConcentrationSurfaceNanoporeMembraneIsoelectric pointBovine serum albuminPermeability (electromagnetism)Chemical physicsFISICA APLICADAPhysical SciencesChemical Sciencesbiology.proteinsymbolsCattlePorosity
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CHARACTERIZATION OF HYDROPHOBIC POLYMERIC MEMBRANES FOR MEMBRANE DISTILLATION PROCESS

2010

Hydrophobic microporous membranes are utilized in membrane distillation (MD) processes, e.g. seawater desalination at moderate temperatures. The vapour permeability of commercial hydrophobic membranes with different pore sizes (0.2-1 micron) was characterized through a simple apparatus designed-on-purpose. A cylindrical vessel had a face closed by the membrane and the other connected to a thin graduate tube. The water level variation in the tube is recorded and related to the vapour flux across the membrane. Measurements were taken in the temperature range 20-80°C. A fan tangential to membrane surface was employed to maintain a constant driving force for vapour transport. Vapour flux did no…

Settore ING-IND/24 - Principi Di Ingegneria ChimicaSettore ING-IND/26 - Teoria Dello Sviluppo Dei Processi ChimiciChemistrySeawater desalinationSynthetic membraneMembrane distillation hydrophobic membranesMembrane distillationCharacterization (materials science)MembraneSettore ING-IND/22 - Scienza E Tecnologia Dei MaterialiChemical engineeringMicroporous membranesScientific methodOrganic chemistryGeneral Materials SciencePolymeric membrane
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Plasticizer extraction of Taxol infusion solution from various infusion devices.

1996

Taxol solution extracts the plasticizer DEHP (di(2-ethylhexyl)phthalate) from polyvinyl chloride (PVC) materials. In order to minimize patient exposure to DEHP, Taxol solutions should be prepared and administered in PVC-free materials. Particulate matter may form in Taxol infusion solution over time, so that in-line filtration with microporous membranes not greater than 0.22 microns is advisable. The purpose of this study was to evaluate the suitability of various administration- and in-line filter-sets for Taxol application. The extent of leached DEHP was determined using a Reversed Phase HPLC assay specific for DEHP. The four tested administration-sets, labeled as PVC-free, were all found…

endocrine systemPaclitaxelDrug StoragePharmaceutical Sciencemacromolecular substancesPharmacyToxicologylaw.inventionchemistry.chemical_compoundlawPlasticizersMicroporous membranesDiethylhexyl PhthalateHumansPharmacology (medical)Infusions IntravenousFiltrationChromatography High Pressure LiquidDrug PackagingPharmacologyChromatographyInfusion solutionorganic chemicalsExtraction (chemistry)PhthalatePlasticizerGeneral MedicineReversed-phase chromatographyAntineoplastic Agents PhytogenicPolyvinyl chloridechemistryPharmacy worldscience : PWS
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