PRESENTATION (Selected)

Rizwen Ur Rahman, Tae Joon Kwak, Jorg C. Woehl, Woo-Jin Chang, Particle immobilization stiffness in dielectrophoresis trap depending on the geometry, Proceedings of the ASME 2020, International Mechanical Engineering Congress and Exposition (IMECE2020), November 16-19, 2020, Portland, OR, USA, accepted @ 7/28/2020.

Tae Joon Kwak, Mohammad Rizwen Ur Rahman, Jörg C. Woehl, Woo-Jin Chang, “Dielectrophoretic corral trap device for single bioparticle immobilization”, The 34th International Technical Conference on Circuits/Systems, Computers and Communications (ITC-CSCC 2019), Jeju, South Korea, June 23 - 26, 2019.

Chang-Koo Yun, Mohammad Rizwen Ur Rahman, Tae Joon Kwak, Yong-Soo Choi, Woo-Jin Chang, Dielectrophoretic particle separation for organelle isolation and analysis from the single cell, ASCB EMBO 2018 Meeting, San Diego, CA, December 8-12, 2018.

Tae Joon Kwak, Jorg C. Woehl, Woo-Jin Chang, Dielectrophoretic corral trap for single particle trapping and characterization technique, BMES Annual Conference, Atlanta, Georgia, October 17-20, 2018.

Misong Ryu, Woo-Jin Chang (2016). Interference of KCl on Cobalt Nanoparticle-based Electrochemical Low-cost Disposable Phosphate Sensor, BMES Annual Conference, Minneapolis Convention Center, Minneapolis, Minnesota, October 5–8, 2016.

Tae Joon Kwak, Young Gyu Nam, Maria Alejandra Najera, J. Rudi Strickler, Woo-Jin Chang (2016). Improved mixing efficiency using Convex Grooves in passive micro-mixer with low Reynolds number scheme, BMES Annual Conference, Minneapolis Convention Center, Minneapolis, Minnesota, October 5–8, 2016.

Dong-Woo Shin, Sungkyun Lee, Woo-Jin Chang, Yoon Mo Koo, Correlation between 3-dimensional geometry of void volume and separation resolution in chromatography column, AFOB Summer Forum, Qingdao Haidu Hotel, Qingdao, China, August 16 – 19, 2016.

Young-Gyu Nam, Woo-Jin Chang (2016). Effect of junction geometry on mono-dispersed micro-droplet generation in microfluidic aqueous two-phase systems, International Symposium on Flow Visulization, Gatlinburg Convention Center, Gatlinburg, Tennessee, June 19 – 22, 2016.

Jung Wook Hwang, Yong-Soo Choi, and Woo-Jin Chang, Phosphate buffered saline micro-droplet generation in a microfluidic device using water immiscible hexafluorophosphate- and bis(trifluoromethylsulfonyl)imide-based room temperature ionic liquids, BMES Annual Meeting, Tampa Convention Center, Tampa, FL, October 7-10, 2015.

Alex Francis, Xavier Udad, Tae Joon Kwak, Rustin Bergren, Jorg Woehl, Woo-Jin Chang, Ilya Avdeev, Novel Molecular Trapping Technology and Translational Prototype Development, Poster, IEEE USA Annual Meeting 2015 & 36th Great Lakes Biomedical Conference, Milwaukee Hilton City Center, Milwaukee, WI, May 14-17, 2015.

Derek Haag, Woo-Jin Chang, Fabrication of a treated pH sensor for field testing, UWM SURF Research Poster Competition, April 26, 2015.

Samuel Reed, Woo-Jin Chang, Microfluidic mixing on microstructured leaf surfaces, CEAS SURF contest, April 25, 2015.

Derek Haag, Woo-Jin Chang, Fabrication of a treated pH sensor for field testing, CEAS SURF contest, April 25, 2015.

Caracal Keithrafferty, Sarah Horn, J. Rudi Strickler, and Woo-Jin Chang, Analysis of Daphnia pulex Responses to Heavy Mineral Oil in a Kreisel Tank, CEAS SURF contest, April 25, 2015.

Hye-Jung Park, Sungkyun Lee, Jinil Kim, Woo-Jin Chang, Yoon-Mo Koo, Geometrical implementation of inter-particle pore of chromatographic column into MEMS device and its comparative study, KIChE Spring Meeting, ICC, Jeju, Republic of Korea, April 22-24, 2015.

Jiang Yang, Woo-Jin Chang, and Sundaram Gunasekaran, Disposable electrochemical paper microfluidic pH sensor based on IrO2-graphene thin films with digital display for water monitoring, MRS Meeting & Exhibition, Hynes Convention Center, Boston, MA, November 30 – December 5, 2014.

S. K. Lee, J. Y. Yoon, W.-J. Chang, Y.-M. Koo, Poster, Characterization of flat micro-scale chromatography columns by elution analysis, The Korean Institute of Chemical Engineers 2014 Fall Conference, Daejun, Republic of Korea, October 22 – 24, 2014.

Caracal Keithrafferty, Sarah Horn, Woo-Jin Chang, and J. Rudi Strickler, Poster, Analysis of Daphnia pulex Reactions to Heavy Mineral Oil in a Kreisel Tank, CEAS summer SURF presentation, 8/15/2014.

Woo-Jin Chang, Sungkyun Lee and Yoon-Mo Koo, Comparison of cylindrical and flat micro-scale chromatography columns on acid and sugar separation, InterPore 2014, Milwaukee, WI, May 27 – 30, 2014.

Wesley Stine Bassindale, Woo-Jin Chang, Poster, Hydrophobic barrier pattern stamping in porous media for low-cost paper-fluidic device fabrication, InterPore 2014, Milwaukee, WI, May 27 – 30, 2014.

M. A. Najera, Y.-G. Nam, J. van Eerden, J. R. Strickler, W.-J. Chang, Poster, Microfluidics and form and function in cyclopoid copepods, UWM Night; The Science Edition, Brewhouse Inn & Suites – Kettle Atrium, Milwaukee, WI, May 28, 2014.

Wesley Bassindale and Woo-Jin Chang, Hydrophobic barrier pattern stamping in porous media for low-cost paper-fluidic device fabrication, 2014 CEAS Research Poster Competition, April 11, 2014.

Maria Alejandra Najera, Young Gyu Nam, J. Rudi Strickler, and Woo-Jin Chang, Herringbone Micro-mixer Geometries on Mixing Efficiencies in Microchannel, 2014 CEAS Research Poster Competition, April 11, 2014.

James Van Eerden, Maria Alejandra Najera, Young-Gyu Nam, J. Rudi Strickler, Woo-Jin Chang, Microfluidics: Copepod form and function, 2014 CEAS Research Poster Competition, April 11, 2014.

Jiang Yang, Woo-Jin Chang, Sundaram Gunasekaran, Oral, Paper-fluidic Enzymatic Electrochemical Biosensing, IEEE-NEMS (Nano/micro engineered and molecular systems) 2014, Waikiki Beach, Hawaii, April 13-16, 2014.

J. Yoon, S. Lee, J.-I. Kim, W.-J. Chang, Y.-M. Koo, Poster, Method of quantifying the correlation between 3D geometry of void volume and resolution in chromatography, Korean Society for Biotechnology and Bioengineering Meeting 2014 and International Symposium, Kyung-Joo, Republic of Korea, April 9 – 11, 2014.

M. A. Najera, Y.-G. Nam, J. R. Strickler, W.-J. Chang, Poster, Herringbone Micro-Mixer Geometries and Mixing Efficiencies in Microfluidic Device, 11th Annual Posters in the Rotunda, UW system, Madison, WI, March 12, 2014 (invited, one of six from UW-Milwaukee).

M. A. Najera, Y.-G. Nam, J. van Eerden, J. R. Strickler, W.-J. Chang, Poster, Microfluidics and form and function in cyclopoid copepods, Ocean Sciences Meeting 2014, Honolulu, Hawaii, February 23-28, 2014.

M. A. Najera, Y.-G. Nam, J. R. Strickler, W.-J. Chang, Poster, Herringbone micro-mixer geometries on mixing efficiencies in microchannel, Ocean Sciences Meeting 2014, Honolulu, Hawaii, February 23-28, 2014.

J. van Eerden, M. A. Najera, Y.-G. Nam, J. van Eerden, J. R. Strickler, W.-J. Chang, Poster, Microfluidics and form and function in cyclopoid copepods, Ocean Sciences Meeting 2014, Honolulu, Hawaii, February 23-28, 2014.

S.-K. Lee, Y. J. Yang, W.-J. Chang, Y.-M. Koo, Poster, Comparison of acid and sugar elution curves in micro-scale column and cylindrical column, 2013 KSBB Fall Meeting and International Symposium, BEXCO, Busan, Republic of Korea, October 16 – 18, 2013.

M. A. Najera, J.-H. Yu, W.-J. Chang, Herringbone micro-mixer geometries on mixing efficiencies in microchannel,2013 Undergraduate Research Symposium, University Wisconsin-Milwaukee, Milwaukee, WI, April 19, 2013.

A. Krause, Y.-G. Nam, W.-J. Chang, Polymeric droplet generation using a microfluidic device, 2013 Undergraduate Research Symposium, University Wisconsin-Milwaukee, Milwaukee, WI, April 19, 2013.

Y. G. Nam, W.-J. Chang, Aqueous two- phase microdroplet generation in microfluidic device : effect of junction, 2013 UWM CEAS poster competition, UW-Milwaukee, WI, 4/20/2013.

J. Motschman, K. Kunz, R. Gray, W.-J. Chang, J. R. Strickler, Oil spill consequences: Observing oil droplets and animal interactions at the microscopic scale, 2013 UWM CEAS poster competition, UW-Milwaukee, WI, 4/20/2013.

M. A. Najera, J.-H. Yu, W.-J. Chang, Herringbone micro-mixer geometries on mixing efficiencies in microchannel,2013 National Conference on Undergraduate Research (NCUR), University Wisconsin-La Crosse, La Crosse, WI, April 11 – 13, 2013.

J. D. Motschman, K. L. Kunz, A. Nihongi, W.-J. Chang, J. R. Strickler, Inception: engineering multi-layer spherical microfluidic oil droplets of different compositions to test oil-zooplankton interactions, ASLO 2013 Aquatic Sciences Meeting, New Orleans, Louisiana, February 17-22, 2013.

K. L. Kunz, J. D. Motschman, W.-J. Chang, and J. R. Strickler, Hydrophobic animals encounter hydrophobic droplets in the feeding current: the role of dispersants, 2013 Gulf of Mexico Oil Spill & Ecosystem Science Conference, New Orleans Marriott Hotel, New Orleans, Louisiana, January 21 – 23, 2013.

J. D. Motschman, K. L. Kunz, W.-J. Chang, J. R. Strickler, Manufacturing micro-oil droplets of different sizes and compositions to test oil-animal interactions, 2013 Gulf of Mexico Oil Spill & Ecosystem Science Conference, New Orleans Marriott Hotel, New Orleans, Louisiana, January 21 – 23, 2013.

A. Francis, M. Shams, S. K. Lee, W.-J. Chang, I. Avdeev, Study of micro bead behavior in the presence of dielectrophoretic and electrohydrodynamic traps, CEAS Research Poster Competition, UWM Union, Milwaukee, Wisconsin, April 28, 2012.

J. D. Motschman, S. Bona, J. Sheng, W.-J. Chang, J. R. Strickler, Fluid dynamics & biomechanics: observing zooplankton behavior in the presence of microdroplets, CEAS Research Poster Competition, UWM Union, Milwaukee, Wisconsin, April 28, 2012.

J. D. Motschman, C. M. Drifke, D. M. DeFilippis, W.-J. Chang, J. R. Strickler, Optical microfluidics: observing zooplankton behavior in the presence of microbubbles, National conference on undergraduate research (NCUR), Weber State University, Ogden, Utha, March 29-31, 2012.

J. R. Strickler, A. Nihongi, Niarek, W.-J. Chang, J. Sheng, Chemosensory grazing by calanoid copepods #2, Ocean Sciences Meeting, Salt Palace Convention Center, Salt Lake City, Utah, February 20-24, 2012.

J. D. Motschman, S. R. Bona, W.-J. Chang, J. R. Strickler, Optical microfluidics: observing zooplankton behavior in the presence of microbubbles, Ocean Sciences Meeting, Salt Palace Convention Center, Salt Lake City, Utah, February 20-24, 2012.

A. Chen, T. Byvank, A. Bharde, R. Sooryakumar, W.-J. Chang, R. Bashir, On-chip magnetic separation and cell encapsulation in droplet, American Physics Society March meeting, Boston Convention Center, Boston, Massachusetts, February 27 – March 2, 2012.

Sang-Woo Bae, Woo-Jin Chang, Sung Ho Ha, Yoon-Mo Koo, “MS-based Ionic Liquid as an Additive of the Batch Dilution Refolding of Sulfur-containing Proteins”, ACB 2011, Shanhai Everbright Convention & Exhibition Center, China, May 11-15, 2011.

Sang-Woo Bae, Woo-Jin Chang, Sung Ho Ha, Yoon-Mo Koo, “Effect of imidazolium-based ionic liquids on refolding of disulfide bond protein as refolding additive”, KIChE Fall meeting, Dae-Jeon Convention Center, Korea, October 20-22, 2010

W-J. Chang, E. Salm, N. N. Watkins, Y-S. Jin, and R. Bashir, “Electrical measurement and characterization of PBS-in-ionic liquid droplets in a microfluidic device”, BMES 2010 Annual Meeting, Austin Convention Center, Texas, USA, October 6-9, 2010.

A.K.M. Newaz, W.-J. Chang, K.D. Wallace, M.S. Hughes, S.A. Wickline, R. Bashir, A.M. Gilbertson, L.F. Cohen, L.C. Edge, and S.A. Solin, “Inverse-Extraordianry Optoconductance in Ti/Au/GaAs Hybrid Structures”, 30th International Conference on the Physics of Semiconductors, COEX, Korea, July 25-30, 2010.

W.-J. Chang, H.-J. Suk, R. Bashir, A.K.M. Newaz, and S.A. Solin, “Solution-biased measurements and simulation of extraordinary electroconductance in Ti-GaAs hybrid structures”, American Physics Society March Meeting, Portland, Oregon, USA, March 15-19, 2010.

A.K.M. Newaz, L.C. Edge, K.D. Wallace, M.S. Hughes, S.A. Wickline, S.A. Solin, A.M. Gilbertson, L.F. Cohen, W.-J. Chang, and R. Bashir, “A nanoscale Inverse-Extraordianry Optoconductance (I-EOC) efficient room temperature photodetector”, American Physics Society March Meeting, Portland, Oregon, USA, March 15-19, 2010.

Sang-Woo Bae, Woo-Jin Chang, Sung Ho Ha, and Yoon-Mo Koo, “Effect of redox system on lysozyme refolding with room temperature ionic liquids”, KSBB annual meeting, Kyungwon University, April 15-16, 2010.

Sang-Woo Bae, I Seul Moon, Hye-Jin Kang, Sung-Mi Hwang, Sung Ho Ha, Woo-Jin Chang and Yoon-Mo Koo, “Optimization of Lysozyme Refolding Process Utilizing RTIL in Refolding Buffer”, APBioChEC 2009, Kobe International Conference Center, Kobe, Japan, November 24-28, 2009.

Sang-Woo Bae, Hye-Jin Kang, Sung-Mi Hwang, Sung Ho Ha, Woo-Jin Chang, and Yoon-Mo Koo, “Effect of temperature & additive on lysozyme refolding with RTILs refolding buffer”, APBioChEC 2009, Kobe International Conference Center, Kobe, Japan, November 24-28, 2009.

W.-J. Chang, H.-J. Suk, I. Ahmad, I. Adesida, A. K. M. Newaz, S. A. Solin and R. Bashir, “Solution-biased Measurements of Extraordinary Electroconductance in Ti-GaAs Hybrid Structures”, 4th Annual NCI Alliance for Nanotechnology in Cancer Investigators’ Meeting, Manhattan Beach, USA, October 20-22, 2009.

W.-J. Chang, H.-J. Suk, I. Ahmad, I. Adesida, A. K. M. Newaz, S. A. Solin and R. Bashir, “Solution-biased Measurements of Extraordinary Electroconductance in Ti-GaAs Hybrid Structures”, BMES 2009 Annual Fall Scientific Meeting, David L. Lawrence Convention Center, Pittsburgh, USA, October 7-10, 2009.

W.-J. Chang, H.-J. Suk, I. Ahmad, I. Adesida, A. K. M. Newaz, K. Wallace, M.S. Hughes, S.A. Wickline, S. A. Solin and R. Bashir, “Characterization of solution-biased extraordinary electroconductance in Ti-GaAs hybrid structures”, UIUC-CAPN Workshop, Beckman Institute, Urbana, USA, August 31-September 1, 2009.

W.-J. Chang, H.-J. Suk, I. Ahmad, I. Adesida, A. K. M. Newaz, K. Wallace, M.S. Hughes, S.A. Wickline, S. A. Solin and R. Bashir, “Characterization of solution-biased extraordinary electroconductance in Ti-GaAs hybrid structures”, SCCNE Site Visit, Farrell Learning and Teaching Center, St. Louis, USA, May, 14, 2009.

SA Solin, AKM Newaz, Y Wang, J Wu, WJ Chang, VR Kavasseri, IS Ahmad, I Adesida, R Bashir, “Measurement and analysis of extraordinary electroconductance in Ti-GaAs hybrid structures”, Am. Physical Soc. March Meeting, David L. Lawrence Convention Center, Pittsburgh, USA, March, 16-20, 2009.

Sang-Woo Bae, Hye-Jin Kang, Sung-Mi Hwang, Woo-Jin Chang, Sung Ho Ha, Yoon-Mo Koo, “Effect of imidazolium-derived ionic liquids as refolding additive on refolding efficiency”, KSBB annual meeting, POSTECH, April 9-11, 2009.

Sang-Woo Bae, Hye-Jin Kang, Sung-Mi Hwang, Woo-Jin Chang, Sung-Ho Ha, Sang-Hyun Lee, Yoon-Mo Koo, “Effect of the Imidazolium-based ionic liquids as additive on batch refolding of lysozyme”, KSBB annual meeting, Jeju ICC, October 6-7, 2008.

Sung-Mi Hwang, Hye-Jin Kang, Sang-Woo Bae, Woo-Jin Chang, Yoon-Mo Koo, “Effect of Ionic Strength of Mobile Phase and Hydrophobicity of the Resin on Hydrophobic Interaction Chromatography Based Refolding of Lysozyme”, KSBB annual meeting, Jeju ICC, October 6-7, 2008.

AKM Newaz, WJ Chang, Y Wang, SA Solin, I Adesida, I Ahmad, R Bashir, “Transport measurements of extraordinary electroconductance (EEC) in GaAs-Ti metal-semiconductor hybrid structures”, NCI Alliance for Nanotechnology in Cancer, Westin Michigan Av., Chicago, USA, September 8-10, 2008.

WJ Chang, AKM Newaz, Y Wang, SA Solin, S Ahmed, I Adesida, R Bashir, “Fabrication of nanoscopic extraordinary electroconductance (EEC) array device for the live cancer cell imaging”, MNTL BD dedication & CNST Workshop, MNTL, Urbana, USA, September 4-5, 2008.

Na-Mi Park, Woo-Jin Chang and Yoon-Mo Koo, “Effect of IgG on Phase-Separation in Polyethyleneglycol (PEG) with Dextran in Microfluidic Device”, KSBB annual meeting, CheonBuk University, April 18 – 19, 2008.

Sang Hyun Lee, Sung Ho Ha, Dung Thanh Dang, Woo-Jin Chang, Yoon-Mo Koo, “Lipase-catalyzed synthesis of fatty acid sugar ester using supersaturated sugar solution in ionic liquids”, The 13th European Congress on Biotechnology, Barcelona, Spain, September 16 – 19, 2007.

Sung-Mi Hwang, Hye-Jin Kang, Woo-Jin Chang, Chul-Soo Shin, Yoon-Mo Koo, “Effect of the Hydrophobicity of the Resin on the Hydrophobic Interaction Chromatography Based Protein Refolding System”, Asia-Pacific Biochemical Engineer’s Community, Taipei International convention center, Taipei, Taiwan, November 4 – 7, 2007.

Hye-Jin Kang, Sung-Mi Hwang, Woo-Jin Chang, Yoon-Mo Koo, ”Effect of Pore Size of Size Exclusion Resins on Chromatographic Refolding of CGTase”, Asia-Pacific Biochemical Engineer’s Community, Taipei International convention center, Taipei, Taiwan, November 4 – 7, 2007.

Joo-Hyung Choi, Sang-Hyun Lee, Sung-Ho Ha, Woo-Jin Chang, Yoon-Mo Koo, “Interfacial Tension between Water-Immiscible Room Temperature Ionic Liquids and Aqueous Solutions”, Asia-Pacific Biochemical Engineer’s Community, Taipei International convention center, Taipei, Taiwan, November 4 – 7, 2007.

Na-Mi Park, Hye-Mee Park, Woo-Jin Chang, Yoon-Mo Koo, “Inversion of the partition of Horseradish Peroxidase conjugated IgG in Aqueous Two-Phase Systems”, Asia-Pacific Biochemical Engineer’s Community, Taipei International convention center, Taipei, Taiwan, November 4 – 7, 2007.

Sang Hyun Lee, Sung Ho Ha, Dung Thanh Dang, Woo-Jin Chang, Yoon-Mo Koo, “Lipase-catalyzed synthesis of fatty acid sugar ester using supersaturated sugar solution in ionic liquids”, ECB13, Fira de Barcelona – Montjuic, Barcelona, Spain, September 16-19, 2007.

Woo-Jin Chang, Joo-Hyung Choi, Sang-Hyun Lee, Sung-Ho Ha, Yoon-Mo Koo, “Optical detection and estimation of the size of water immiscible RTIL micro-plug in microfluidic device”, The Second Conference on Ionic Liquid, Yokohama, Japan, August 5 – 10, 2007.

Na-Mi Park , Hye-Mee Park, Woo-Jin Chang and Yoon-Mo Koo, “Phase-separation property of polyethylene glycol (PEG) or IgG conjugated PEG with dextran in microchannel”, KSBB annual meeting, DaeGu Hotel Interbulgo, October 18 – 21, 2007.

Joo-Hyung Choi, Sang-Hyun Lee, Sung-Ho Ha, Woo-Jin Chang, Yoon-Mo Koo, “Formation of micro-plug in microfluidic device using water immiscible room temperature ionic liquids”, KSBB annual meeting, Song-Do Technopark, , April 26 – 28, 2007.

Sung-Mi Hwang, Hye-Jin Kang, Woo-Jin Chang, Chul-Soo Shin, Yoon-Mo Koo, “Continuous protein refolding using hydrophobic interaction chromatography”, KSBB annual meeting, Song-Do Technopark, , April 26 – 28, 2007.

Na-Mi Park, Hye-Mee Park, Woo-Jin Chang, Yoon-Mo Koo, “Immunoassays in aqueous two phase system forming polymer solutions”, KSBB annual meeting, Song-Do Technopark, , April 26 – 28, 2007.

Thanh Thi Ngoc Doan, Sang Hyun Lee, Sung Ho Ha, Hiep Minh Nguyen, Woo-Jin Chang, Yoon-Mo Koo, “Influence of ionic liquids as additives on sol-gel immobilized lipase”, KSBB annual meeting, Song-Do Technopark, , April 26 – 28, 2007.

Hye-Jin Kang, Sung-Mi Hwang, Woo-Jin Chang, Yoon-Mo Koo, “CGTase refolding using size exclusion chromatography”, KSBB annual meeting, Song-Do Technopark, , April 26 – 28, 2007.

Sang Hyun Lee, Dung Thanh Dang, Sung Ho Ha, Woo-Jin Chang, Yoon-Mo Koo, “Lipase-catalyzed synthesis of sugar ester by using supersaturated sugar solution in ionic liquid”, KSBB annual meeting, Song-Do Technopark, , April 26 – 28, 2007.

Joo-Hyung Choi, Sang-Hyun Lee, Sung-Ho Ha, Yoon-Mo Koo and Woo-Jin Chang, “Optical measurement of size distribution of ionic liquid micro-plug in microfluidic device”, KBCS annual meeting, Seo-Kang Univ., Nov. 23. 24., 2006.

Woo-Jin Chang, Hye-Mee Park, Thuan-Hieu Tran, Yoon-Mo Koo, “Continuous-flow phase-separation of polymer solutions in microfluidic aqueous two-phase extraction system”, micro-TAS, Tokyo International forum, Tokyo, Japan, Nov. 5. – 9., 2006.

Thuan-Hieu Tran, Young-Bum Kim, Yoon-Mo Koo, Jin-Hwan Kim, Eun-Ki Kim, Woo-Jin Chang, “Effects of fluidic conditions on the diffusion-based bioluminescent detection of atp in microfluidic device”, micro-TAS, Tokyo International forum, Tokyo, Japan, Nov. 5. – 9., 2006.

Tran Hieu Thuan, Young Bum Kim, Yoon-Mo Koo, Eun Ki Kim, Jin Hwan Kim, Woo-Jin Chang, “Bioluminescence-based monitoring of cryopreservation of Photobacterium phosphoreum immobilized in alginate bead”, KSBB annual meeting, Coex, Sep. 7. – 8., 2006.

Hye Mee Park, Yoon-Mo Koo, Woo-Jin Chang, “Effect of Conjugated Horseradish Peroxidase on the Partition of IgG in Aqueous Two-Phase Systems”, KSBB annual meeting, Chon-Buk Univ., May 10. – 12., 2006.

Yi-Shao Liu, Tom Walter, Woo-Jin Chang, Kwan-Seop Lim, A. Aronson, and R. Bashir, “Electrical Detection of Germination of Model Bacillus anthracis in Microfluidic Biochips”, Hilton Head 2006, Hilton Head Island, South Carolina, USA, June 4. – 8., 2006.

Hye-Mee Park, Tran Hieu Thuan, Yoon-Mo Koo, Woo-Jin Chang, “Distribution and phase-separation of immiscible polymer solutions in microfluidic device, KSBB annual meeting, Jin-Ju City Hall, Oct. 27. - 29., 2005.

Thuan-Hieu Tran, Young-Bum Kim, Yoon-Mo Koo, Jin-Hwan Kim, Eun-Ki Kim and Woo-Jin Chang, “Development of microfluidic device for the rapid detection of microorganisms using bioluminescence”, YABEC, Beijing, Oct. 24 - 26., 2005.

Yoon-Hee Moon, Sung Ho Ha, Woo-Jin Chang, Sang-Mok Lee, Young Jun Kim, Yoon-Mo Koo, “Production of sucrose laurate by lipase-catalyzed transesterification in ionic liquids, KIChE annual meeting, Inha Univ., Oct. 21-22, 2005.

Tran Hieu Thuan, Young Bum Kim, Joo-Young Yoon, Woo-Jin Chang, Yoon-Mo Koo, Jin Hwan Kim, Eun Ki Kim, “Development of microfluidic device system for the bioluminescent assay of ATP”, KIChE annual meeting, Inha Univ., Oct. 21-22, 2005.

Kwan Seop Lim, Woo-Jin Chang, Yoon-Mo Koo, Rashid Bashir, “Embedding microscale metal patterns in polydimethylsiloxane substrate”, u-TAS, Boston, Marriott Copley Place, Oct. 9. - 13., 2005.

Ji-Ho Park, Young-Bum Kim, Woo-Jin Chang, Jin-Hwan Kim, Yoon-Mo Koo and Eun-Ki Kim, “Comparison of the lysis of bacterial cells in microfluidic device”, Cell-based assays for HTS: Cell-based versus cell-free screening, Philadelphia, May. 24 - 25., 2005.

Sang-Mok Lee, Ah-Rom Choi, Yun-Jeong Yang, Woo-Jin Chang, Young-Jun Kim, Yoon-Mo Koo, “Toxicity of Ionic liquids to Microorganisms for Application of in-situ Separation”, APBioChEC, JeJu-Do, May. 15-19, 2005.

Ki-Hwan Nam, Heyjin Hong, Hye-Mea Park, Sang Min Lim, Woo-Jin Chang, Dong-Il Kim, Yoon Mo Koo, “Continuous flow fractionation of CHO-K1 cells in microfluidic device using aqueous two-phase extraction technique”, APBioChEC, JeJu-Do, May. 15-19, 2005.

Ji-Ho Park, Young-Bum Kim, Woo-Jin Chang, Jin-Hwan Kim, Yoon-Mo Koo and Eun-Ki Kim, “Comparison of the lysis of bacterial cells in microfluidic device”, APBioChEC, JeJu-Do, May. 15-19, 2005.

Yoon-Mo Koo, Sang-Mok Lee, Woo-Jin Chang, Yoon-Hee Moon, A-Rom Choi, Young-Jun Kim, “Application of Ionic Liquids in Biotechnology”, KIChE annual meeting, Yeo-Soo Univ., Apr. 22-23, 2005.

Ji Hye Kim, Eun Young Kwak, Ji Ho Park, Hye Mee Park, Young Bum Kim, Woo-Jin Chang, Jin Hwan Kim, Eun Ki Kim, “Optimization of Cell lysis-reagent solution by Statistical Methods”, KSBB annual meeting, Kang-Won Univ., Apr. 15-16, 2005.

Ki-Hwan Nam, Hyejin Hong, Sang Min Lim, Woo-Jin Chang, Dong-Il Kim, Yoon-Mo Koo, “Separation of Animal Cells in Microfluidic DeviceUsing Aqueous Two-Phase Extraction”, KSBB Fall Meeting, Chungbuk National University, October 13-15, 2004.

Ji-Ho Park, Ji-Hye Kim, Young-Bum Kim, Woo-Jin Chang, Ju-Hyoung Yun, Jin-Hwan Kim, Yoon-Mo Koo, Eun-Ki Kim, “Lysis of Bacterial Cells in Microfluidic Device for Bioluminescent Assay of ATP”, KSBB Fall Meeting, Chungbuk National University, October 13-15, 2004.

Woo-Jin Chang, Yoon-Mo Koo, Kyung-Won Ro, Jong-Hoon Hahn, T. T. Huang, M. R. Ladisch, D. Akin, R. Bashir, “Bioseparation techniques in microfluidic devices using micro-bead”, invited, KIChE annual meeting, Gong-Ju City, Korea, Apr. 23-24, 2004.

Tom T. Huang, Woo-Jin Chang, Demir Akin, Rafael Gomez, Rashid Bashir, Nathan Mosier, Michael R. Ladisch, “Fabrication of microfluidic channels using microfiber with PDMS”, AIChE Annual meeting, San Francisco, USA, Nov. 16-21, 2003.

Woo-Jin Chang, Demir Akin, Yoon-Mo Koo, Rashid Bashir, “Development of PDMS/silicon hybrid biochip for long-term cell-incubation applications, Young Asian Biochemical Engineer’s Community, Jeju-Do, Korea, Nov. 13-15, 2003.

Woo-Jin Chang, Rafael Gomez, Haibo Li, Demir Akin, Rashid Bashir, “An Investigation of Fluid Absorption in Hybrid Poly(dimethylsiloxane) (PDMS)/Silicon Biochips For Long-term Cell-Incubation Applications”, American Chemical Society National Meeting, New York City, USA, Sep. 7-11, 2003.

Woo-Jin Chang, Rafael Gomez, Haibo Li, Demir Akin, Rashid Bashir, “An Investigation of Fluid Absorption in Hybrid Poly(dimethylsiloxane) (PDMS)/Silicon Biochips For Long-term Cell-Incubation Applications”, CHI’s Annual BioMEMS and Nanotech world, Washington D.C., USA, Aug. 25-26, , 2003.

Tom T. Huang, Tao Geng, Demir Akin, Woo-Jin Chang, Jennifer Sturgis, Rashid Bashir, Arun K. Bhunia, J. Paul Robinson, and Michael R. Ladisch, “Bio-mediated Assembly of Functionalized Microbeads For Capture Of Microorganisms”, ACS National Meeting, New Orleans, USA, March 23-27, 2003.

R. Bashir, D. Akin, R. Gomez, H. Li, W-J. Chang, A. Gupta, “From BioMEMS to Bionanotechnology: Integrated BioChips for the Detection of Cells and Microorganisms”, invited, MRS Spring Meeting, San Francisco, USA, April 22, 2003.

Woo-Jin Chang, Ho-Joon Lee, and Yoon-Mo Koo, “Partition of beta-cyclodextrin in ATPS using triblock copolymer”, KSBB Fall Meeting, Konkuk University, April 14, 2001

Jin-Hee Kim, Woo-Jin Chang, and Yoon-Mo Koo, “Characterization and application of hydrogen bonding in Poly(2-ethyl-2-oxazoline)/poly(acrylic acid)”, KSBB Fall Meeting, November 9-11, 2000.

Young-Mi Kim, Woo-Jin Chang, and Yoon-Mo Koo, “On-line recovery of large molecules from mixture solution using semi-continuous size exclusion chromatography”, KIChE Spring Meeting, April 20-22, 2000.

Woo-Jin Chang and Yoon-Mo Koo, "Interconversion reactions among cyclodextrin homologues by cyclodextrin glycosyltransferase", ACS National Meeting, San Francisco, USA, Mar. 26-30, 2000.

Young-Mee Kim, Yoon-Mo Koo, and Woo-Jin Chang, "On-Line Recovery of Large Molecules using Reciprocating Chromatography with Application to Enzymatic Conversion System", International Conference on Bioseparation Engineering, Nikko, Japan, July 4-7, 1999.

Young-Me Kim, Woo-Jin Chang, and Yoon-Mo Koo, "Comparison of Operation Modes of Size Exclusion Chromatography in On-Line Recovery of Large Molecules from Mixture", ECB9/2372, the 9th European Congress of Biotechnology, Brussels, Belgium, July 11-15, 1999.

Yoon-Mo Koo, Young-Mee Kim, Woo-Jin Chang, "On-Line Recovery of Large Molecules using Reciprocating Size Exclusion Chromatography with Application to Enzymatic Conversion System", p. 75, The 4th China-Korea Regional Biotechnology Symposium, Myongji Univ., Korea, August 17-19, 1999.

Young-Mee Kim, Woo-Jin Chang, and Yoon-Mo Koo, "Operational Comparisons of Size Exclusion Chromatography in On-line Recovery of Large Molecules", YABEC'99, pp.78-79, Pukyong Univ., Korea, August 20-22, 1999.

Woo-Jin Chang and Yoon-Mo Koo, "Extraction of β-galactosidase from E. coli double lysogen using aqueous two phase system", The 5th International Symp. on Sep. Tech.-Korea and Japan, pp. 921-924, Yonsei Univ., Korea, August 19-21, 1999.

Woo-Jin Chang, Sung-Sik Park and Yoon-Mo Koo, "Production of Cyclodextrin Homologues using Aqueous Two-phase System", the 5th APBioChEC, Phuket, Bangkok, Nov. 15-18, 1999.

Chang, W.J., Moon, Y.H., Koo, Y.M., "Modeling for Lipase Activity by Agar diffusion Method", 179-182, YABEC'98, Hualien, Taiwan, November 28-30, 1998.

Woo-Jin Chang and Yoon-Mo Koo, “On-line recovery of large molecules using reciprocating size exclusion chromatography with temperature swing”, KIChE Fall Meeting, Chosun University, October 23-24, 1998.

Yoon-Mo Koo and Woo-Jin Chang, “Bioconversion of cyclodextrin homologues by CGTase”, KSBB Fall Meeting, Hanyang University, October 16-17, 1998.

Chang, W.J. and Koo, Y.M., "Continuous Removal of Larger Molecules using Reciprocating Size Exclusion Chromatographic Method", 16-17, '98 Autumn Conference of Society of Chem. Eng., Japan, Yamagata Univ., Yonezawa, Japan, September 29- October 1, 1998.

Chang, W.J. and Koo, Y.M., "Production and Recovery of Cyclodextrin in Aqueous Two-phase System"ghk, 518-523, The 2nd China-Korea Conference on Separation Science and Technology, Qingdao, China, August 24-26, 1998.

Chang, W.J. and Koo, Y.M., "Production and Partition of Cyclodextrin Mixtures in Aqueous Two-Phase System", 10th International Conference on Partition in Aqueous Two-Phase Systems, Reading, England, August 11, 1997.

Woo-Jin Chang and Yoon-Mo Koo, “Recovery of beta-cyclodextrin using ultrafiltration, KIChE Spring Meeting, Dongguk University, April 25, 1997.

Woo-Jin Chang and Yoon-Mo Koo, “Development of enzymatic de-inking process for recycling of office papers”, KSBB Fall Meeting, Pusan University, October 12, 1996.

Woo-Jin Chang and Yoon-Mo Koo, “Recovery of intracellular enzyme using phage lysogen and EBA”, KIChE Fall Meeting, Dong-A University, October 21, 1995.

Woo-Jin Chang and Yoon-Mo Koo, “Recovery of intracellular enzyme using phage lysogen and EBA”, BPERC Symposium, KAIST, September 15, 1995.