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  • Medical Device Link . Development applications for membrane-bottom microwell plates
    is highly resistant to most solvents, but polysulfone is generally used for aqueous-based biological samples. Polytetrafluoroethylene (PTFE) membranes are hydrophobic and highly resistant to solvents, acids, alkalides, and propellants. Finally, ultrafiltration membranes (molecular-weight cut-off filters
  • FILMTEC Membranes: Basics of RO and NF Historical Background
    Since the development of reverse osmosis (RO) and ultrafiltration (UF) as practical unit. operations in the late 1950's and early 1960's, the scope for their application has been. continually expanding. Initially, reverse osmosis was applied to the desalination of seawater and brackish water
  • Tangential Flow Filtration Explores New Niches
    the product, and relies upon two filtration skids. Product slurry in the harvest tank passes through the first TFF skid, isolating the product fragments. This isolation step can use either a microfiltration membrane or ultrafiltration membrane with a high-molecular-weight cutoff to filter out
  • Upfront
    . Fractionating generally requires size-exclusion chromatography, or staged membrane processing, both of which are expensive and labor-intensive steps. Ultrafiltration offers a simpler, faster method, Sellick says. So far, Pall has developed some cassette holders for semidisposable ultrafiltration membranes
  • Medical Device Link .
    chromatography or membrane adsorbers. Further purification, concentration, and final polishing are achieved with ultrafiltration and membrane flow-through devices, and extended by gel permeation chromatography. Such steps are needed to remove the remaining DNA, endotoxins,
  • Interphex Preview, Part Deux
    and service covering every step from the start of development to the industrialization of the process. Separation systems include microfiltration, ultrafiltration, nanofiltration and reverse osmosis. Organic and inorganic membranes are available with various supports including ceramics, spiral wound
  • What to Expect at Interphex 2007
    use/disposables solutions such as tubing with molded Ys, Ts, mini and standard Tri-Clamps, stoppers, and sealers. ( Novasep Process manufactures process chromatography, ion exchange and cross-flow membrane filtration systems (including microfiltration, ultrafiltration, nanofiltration and reverse
  • MICRO:Product Technology News (May '99)
    specifications. Wide-channel tubular ultrafiltration and microfiltration water-treatment systems remove contaminants prior to reverse osmosis, reuse, or sewer discharge, and remove metals in PCB manufacturing operations before reuse or discharge. Membrane filtration concentrates contaminants in the waste stream

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