JAMES FRANK NELSON
Pilots at Hilldale Park Ln, Spring, TX
License number
Texas A2715210
Issued Date
Oct 2016
Expiration Date
Apr 2017
Category
Airmen
Type
Authorized Aircraft Instructor
Address
Address
2611 Hilldale Park Ln, Spring, TX 77386
Professional information
Sample Concentrator
US Patent:
4164464, Aug 14, 1979
Filed:
Apr 14, 1978
Appl. No.:
5/896370
Inventors:
William B. Allington - late of Lincoln NE
James W. Nelson - Spring TX
Arthur L. Cordry - Lincoln NE
Gail A. McCullough - Lawndale CA
Don E. Mitchell - Lincoln NE
James W. Nelson - Spring TX
Arthur L. Cordry - Lincoln NE
Gail A. McCullough - Lawndale CA
Don E. Mitchell - Lincoln NE
Assignee:
Instrumentation Specialties Company - Lincoln NE
International Classification:
G01N 2726, G01N 2728
US Classification:
204299R
Abstract:
To concentrate a material by separating it from a diluting medium, the combination of the material and medium is placed in one of two wells in the bottom of a plastic sample concentrator cell, with each well being closed at its bottom end by a different cellophane membrane in contact with a buffer solution in a different one of two buffer compartments. A buffer solution also connects the combination of material and medium in one well and the cellophane bottom of the other well within the sample concentration cell through a recess in the bottom of the sample concentration cell. A potential is applied across the two buffer compartments to cause the material to migrate by electrophoresis from the medium in one well, through the buffer in the sample concentrating cell and into the other well, where it is concentrated against the cellophane membrane for easy removal by pipetting.