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Agricultural Research Service United States Department of Agriculture
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Joseph Uknalis
Core Technologies
Biologist

Phone: (215) 233-6439
Fax: (215) 233-6581
USDA,REE,ARS,NAA,ERRC
600 E MERMAID LANE
WYNDMOOR, PA, 19038-8598


Publications (Clicking on the reprint icon Reprint Icon will take you to the publication reprint.)
A high-throughput antibody-based microarray typing platform - (Peer Reviewed Journal)
Gehring, A.G., Barnett, C., Chu, T., Debroy, C., D'Souza, D., Eaker, S., Fratamico, P.M., Gillespie, B., Hedge, N., Jones, K., Lin, J., Oliver, S., Paoli, G., Perera, A., Uknalis, J. 2013. A high-throughput antibody-based microarray typing platform. Sensors. DOI: 10.3390/s130505737.
Effects of sugar addition in luria bertania (LB) media on Escherichia coli 0157:H7 - (Peer Reviewed Journal)
Medina, M.B., Uknalis, J., Tu, S. 2011. Effects of sugar addition in luria bertania (LB) media on Escherichia coli 0157:H7. Journal of Food Safety. 31(3):386-394.
Production of Shiga-like toxins by Escherichia coli O157:H7: Effects of other bacteria and analogues of quorum sensing molecules - (Peer Reviewed Journal)
Tu, S., Uknalis, J., Paoli, G., He, Y., Gehring, A.G. 2009. Production of Shiga-like toxins by Escherichia coli O157:H7: Effects of other bacteria and analogues of quorum sensing molecules. Journal of Rapid Methods and Automation in Microbiology.17(4):420-437.
Applications of Immunomagnetic Beads and Biosensors for Pathogen Detection in Produce - (Book / Chapter) - (15-Apr-08)
Application of horse-radish peroxidase linked chemiluminescence to determine the production mechanism of Shiga-like toxins by E. coli O157:H7 - (Proceedings)
Tu, S., Uknalis, J., Gehring, A.G., He, Y. 2007. Application of horse-radish peroxidase linked chemiluminescence to determine the production mechanism of Shiga-like toxins by E. coli O157:H7. Proceedings of SPIE.#6761
Application of horse-radish peroxidase linked chemiluminescence to determine the production mechanism of Shiga-like toxins by E. coli O157:H7 - (Proceedings)
Tu, S., Uknalis, J., Gehring, A.G., He, Y. 2007. Application of horse-radish peroxidase linked chemiluminescence to determine the production mechanism of Shiga-like toxins by E. coli O157:H7. Proceedings of SPIE.6761:67610C-1-67610C-9.
FIBEROPTIC BIOSENSOR EMPLOYING ALEXA-FLUOR CONJUGATED ANTIBODY FOR DETECTION OF ESCHERICHIA COLI O157:H7 AND SHIGA-LIKE TOXINS - (Proceedings)
Tu, S., Geng, T., Uknalis, J., Bhunia, A.K. 2006. Fiberoptic biosensor employing alexa-fluor conjugated antibody for detection of escherichia coli o157:h7 and shiga-like toxins. Proceedings of SPIE. 6:(6381:638106-1).
PIEZOELECTRIC EXCITED MILLIMETER-SIZED CANTILEVER (PEMC) SENSOR DETECTS ESCHERICHIA COLI 0157:H7 IN TWO-HOUR INCUBATED SAMPLES AT 4 CFU PER GRAM OF BEEF - (Peer Reviewed Journal)
Campbell, G.A., Uknalis, J., Tu, S., Mutharasan, R. 2006. Piezoelectric excited millimeter-sized cantilever (pemc) sensor detects escherichia coli 0157:h7 in two-hour incubated samples at 4 cfu per gram of beef. Biosensors and Bioelectronics. 22(2007)1296-1302
FIBER-OPTIC BIOSENSOR EMPLOYING ALEXA-FLUOR CONJUGATED ANTIBODY FOR DETECTION OF ESCHERICHIA COLI 0157:H7 FROM GROUND BEEF IN FOUR HOURS - (Peer Reviewed Journal)
Geng, T., Uknalis, J., Tu, S., Bhunia, A. 2006. Fiber-optic biosensor employing alexa-fluor conjugated antibody for detection of escherichia coli 0157:h7 from ground beef in four hours. Sensors. 6:796-807
LUMINESCENT METHODS TO DETECT VIABLE AND TOTAL TARGETED ESCHERICHIA COLI 0157:H7 SPIKED IN GROUND BEEF - (Peer Reviewed Journal)
Tu, S., Uknalis, J., Yamashoji, S., Gehring, A.G., Irwin, P.L. 2005. Luminescent methods to detect viable and total targeted escherichia coli 0157:h7 spiked in ground beef. Journal of Rapid Methods and Automation in Microbiology. 2005. 13. pp. 57-70.
OPTICAL METHODS FOR DETECTING ESCHERICHIA COLI 0157:H7 SPIKED ON CANTALOUPES - (Proceedings)
Tu, S., Uknalis, J., Gehring, A.G. 2004. Optical methods for detecting escherichia coli 0157:h7 spiked on cantaloupes. Proceedings of SPIE. 5587. pp. 183-189.
DYNAMIC FACTORS CONTROLLING THE PATHOGEN CAPTURE BY IMMUNO MAGNETIC BEADS - (Abstract Only)
Tu, S., Uknalis, J., Gore, M., Irwin, P.L. 2004. Dynamic factors controlling the pathogen capture by immuno magnetic beads. American Chemical Society National Meeting.
OPTICAL METHODS FOR DETECTING E. COLI 0157:H7 SPIKED ON CANTALOUPES - (Abstract Only)
Tu, S., Uknalis, J., Gehring, A.G. 2004. Optical methods for detecting e. coli 0157:h7 spiked on cantaloupes. International Society for Optical Engineering. Paper No. 6-183.
FACTORS AFFECTING THE BACTERIAL CAPTURE EFFICIENCY OF IMMUNO BEADS: A COMPARISON BETWEEN BEADS WITH DIFFERENT SIZE AND DENSITY - (Peer Reviewed Journal)
TU, S., UKNALIS, J., GORE, M., IRWIN, P.L., FEDER, I.E. FACTORS AFFECTING THE BACTERIAL CAPTURE EFFICIENCY OF IMMUNO BEADS: A COMPARISON BETWEEN BEADS WITH DIFFERENT SIZE AND DENSITY. JOURNAL OF RAPID METHODS AND AUTOMATION IN MICROBIOLOGY 11: 35-46. 2003.
THE CAPTURE OF ESCHERICHIA COLI 0157:H7 FOR LIGHT ADDRESSABLE POTENTIOMETRIC SENSOR (LAPS) USING TWO DIFFERENT TYPES OF MAGNETIC BEADS - (Peer Reviewed Journal) - (01-Oct-02)

   
 
Last Modified: 05/22/2013
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