Title :
An integrated microfluidic system using buried optical fibers for detection of phalaenopsis orchid pathogens
Author :
Chih-Lin Lin ; Wen-Hsin Chang ; Chih-Hung Wang ; Ping-Chen Li ; Fuh-Jyh Jan ; Tzong-Yueh Chen ; Gwo-Bin Lee
Author_Institution :
Dept. of Power Mech. Eng., Nat. Tsing Hua Univ., Hsinchu, Taiwan
Abstract :
There is a critical need for early detection of pathogens in Phalaenopsis orchid due to its high economic value in agriculture. In our previous work [1], an integrated microfluidic system capable of detecting these pathogens through pathogen-specific ribonucleic acid (RNA) purification and RNA amplification by using reverse transcription loop-mediated-isothermal-amplification (RT-LAMP) was presented. In this study, a buried optical fiber-based detection module was integrated with the microfluidic chip to monitor the RT-LAMP reaction directly on-chip such that in-line optical detection can be realized. Successful RT-LAMP reaction, which amplifies the nucleic acids that yield the precipitate, magnesium pyrophosphate, and therefore increased the turbidity in the LAMP products could be detected optically. Furthermore, a fluorescent dye, calcein, could be also used in our system to detect the fluorescent signals, if necessary. Thus sensitive and fast diagnosis of the pathogens in Phalaenopsis orchids could be successfully achieved by using the integrated microfluidic system.
Keywords :
RNA; agriculture; bioMEMS; biosensors; botany; dyes; fibre optic sensors; fluorescence; lab-on-a-chip; microfluidics; microorganisms; microsensors; molecular biophysics; optical fibres; precipitation; purification; sensitivity; turbidity; LAMP products; Phalaenopsis orchid pathogen detection; RNA amplification; RNA purification; RT-LAMP reaction monitoring; agriculture; buried optical fiber-based detection module; calcein; economic value; fluorescent dye; fluorescent signals; in-line optical detection; integrated microfluidic system; magnesium pyrophosphate; microfluidic chip; nucleic acids; pathogen-specific ribonucleic acid; precipitate; reverse transcription loop-mediated-isothermal-amplification; sensitivity; turbidity; Fluorescence; Microfluidics; Optical buffering; Optical fiber sensors; Optical fibers; Reverse transcription Loop-medicated-isothermal-amplification (RT-LAMP); microfluidics; optical fiber;
Conference_Titel :
Solid-State Sensors, Actuators and Microsystems (TRANSDUCERS & EUROSENSORS XXVII), 2013 Transducers & Eurosensors XXVII: The 17th International Conference on
Conference_Location :
Barcelona
DOI :
10.1109/Transducers.2013.6626997