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###### Department of Commerce

###### National Institute of Standards and Technology

# AGENCY:

National Institute of Standards and Technology, Commerce.

# ACTION:

Notice of jointly owned invention available for licensing.

# SUMMARY:

The invention listed below is jointly owned by the U.S. Government, as represented by the Department of Commerce, and by Applied Research Associates, Inc. The Department of Commerce's interest in the invention is available for licensing in accordance with 35 U.S.C. 207 and 37 CFR part 404 to achieve expeditious commercialization of results of federally funded research and development.

# FOR FURTHER INFORMATION CONTACT:

                        Technical and licensing information on this invention may be obtained by writing to: National Institute of Standards and Technology, Office of Technology Partnerships, Building 222, Room A242, Gaithersburg, MD 20899. Information is also available via telephone: 301-975-2649, fax 301-975-3482, or e-mail:                         *nathalie.rioux@nist.gov.*                         Any request for information should include the NIST Docket number or Patent number and title for the invention as indicated below.                    

The invention available for licensing is:

## [NIST DOCKET NUMBER: 10-004]

*Title:*                         Gradient Elution Moving Boundary Electrophoresis for the Analysis of Complex Samples and Detection of Toxins.                    

*Abstract:*                         Methods of detecting the presence of toxins in a sample using electrophoretic separations and of performing electrophoretic separation of complex samples are provided. The method of detecting the presence of toxins includes reacting a sample and a substrate with a signaling enzyme which converts the substrate to the product in a reaction medium, introducing a run buffer into a separation channel having an inlet end, selectively introducing at least one of the substrate and the product of the reaction medium into the inlet end of the separation channel, electrophoretically separating the substrate and the product, and determining the rate of conversion of the substrate to the product, wherein a change in the rate of conversion is indicative of the presence of toxins. The method of performing electrophoretic separations of complex samples having charged particulates and oppositely charged analytes comprises introducing a run buffer into a separation channel having an inlet end, selectively introducing the oppositely charged analytes in the complex sample into the separation channel, and electrophoretically separating the charged particulates and the oppositely charged analytes. Additionally, a device for varying with respect to time the bulk flow of a fluid in a separation channel of an electrophoretic device having a buffer reservoir in fluid contact with the separation channel is provided. The device includes a pressure sensor in fluid contact with a buffer reservoir, a high pressure reservoir in selective fluidic communication with the buffer reservoir, a low pressure reservoir in selective fluidic communication with the buffer reservoir and in fluidic communication with the high pressure reservoir, and a pumping device for pumping a gas from the low pressure reservoir to the high pressure reservoir.                    

Dated: May 25, 2010.

Katharine B. Gebbie, 

Director, Physics Laboratory.

[FR Doc. 2010-13200 Filed 6-1-10; 8:45 am]

BILLING CODE 3510-13-P