Emd Millipore Corporation

Mark Kavonian

Kurt E Greenizen

John Doyle

Louis L Bonhomme

George Gagne

Vincent Smith

Sean Devin

Gerard Lombard

Dave Brewster

Elena Chernokalskaya

Vivek Joshi

The present invention provides synthetic membranes which are suitable as a human skin substitute for the investigation of transdermal diffusion of candidate pharmaceutical and cosmetic compounds. The membranes according to the present invention exhibit human skin-like permeability properties with respect to the diffusion of a wide range of compounds having widely different physico-chemical properties.

Polymeric membranes with human skin-like permeability properties and uses thereof

Filtration device suited for concentration of liquid samples, particularly biomolecules, and a method of concentrating, desalting, purifying and/or fractionating liquid samples. In certain embodiments the device includes a housing having a sample reservoir, and two substantially vertically oriented and spaced apart membranes disposed in the housing. An underdrain is associated with each membrane such that fluid passing through each membrane flows through a respective underdrain into a filtrate collection chamber. The fluid that does not pass through the membrane is collected in the retentate collection chamber, and can be recovered such as by a reverse spinning step, achieving recoveries greater than about 90%. The substantially vertical orientation of the membranes increases the available membrane area by at least 2.7 times the area available in a conventional filter device. The two-panel configuration also maintains more available membrane area in use during the last stages of filtration than a one-panel configuration.

Centrifugal filter

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North Reading, MA, United States of America

Mark Kavonian