University of North Florida
Browse the Citations
-OR-

Contact Info

Stuart Chalk, Ph.D.
Department of Chemistry
University of North Florida
Phone: 1-904-620-1938
Fax: 1-904-620-3535
Email: schalk@unf.edu
Website: @unf

View Stuart Chalk's profile on LinkedIn

Stem

Classification: Plant -> potato -> stem

Citations 1

"Prototype Transgenic Biosensor Based On Genetically Modified Plant Tissue"
Anal. Chem. 1993 Volume 65, Issue 21 Pages 3067-3070
Ae June Wang and Garry A. Rechnitz

Abstract: Stem and petiole tissue from transgenic potato plants containing β-glucuronidase gene was homogenized with 0.1 M phosphate buffer of pH 7, and glass beads were mixed with the product in the ratio 1:3. A column containing the modified beads was used at 25°C in a flow injection system for the determination of 4-methylumbelliferyl β-D-glucuronide, with 0.1 M phosphate buffer as mobile phase (2 mL/min) and fluorimetry of the liberated 4-methylumbelliferone. With operation at pH 7.5, the signal was linearly related to glucuronide concentration 25 mM; the detection limit was 1 µM. The corresponding non-transgenic potato tissue gave no response. The enzyme sensor retained 98% of its original response after two months but had a comparatively slow response time (12 min at 25°C).
Fluorescence Sensor Glass beads