NPSA for Specific and Dye-Based Subattomolar Nucleic Acid Detection at 37 °C

We describe a nested phosphorothioated (PS) hybrid primer-mediated isothermal amplification (NPSA) assay which only utilizes EvaGreen (a DNA-binding dye) to achieve specific and dye-based subattomolar nucleic acid detection at 37 °C. The success of low-temperature NPSA essentially depends on employing Bacillus smithii DNA polymerase, a strand-displacing DNA polymerase with wide range of activation temperature. However, the NPSA’s … More NPSA for Specific and Dye-Based Subattomolar Nucleic Acid Detection at 37 °C

pH-EVD: A pH-Paper-Based Extraction and Visual Detection System for Instrument-Free SARS-CoV-2 Diagnostics

Xiong Ding, Ziyue Li, Lori Avery, Enrique Ballesteros, Rohit Makol, and Changchun Liu, Advanced NanoBiomed Research, 2021, http://doi.org/10.1002/anbr.202100101. The ongoing pandemic of coronavirus disease 2019 (COVID-19) caused by severe acute respiratory syndrome coronavirus 2 (SARS-CoV-2) has caused millions of deaths worldwide. However, most SARS-CoV-2 detection methods depend on time-consuming sample preparation and large detection instruments. Herein, a … More pH-EVD: A pH-Paper-Based Extraction and Visual Detection System for Instrument-Free SARS-CoV-2 Diagnostics

One-step 3D-printed microfluidic disc for multiplexed detection of SARS-CoV-2

A new paper titled “Monolithic, 3D-printed lab-on-disc platform for multiplexed molecular detection of SARS-CoV-2” is published in the journal of “Sensors and Actuators B: Chemical”. The lab-on-a-disc system consists of a monolithic, 3D-printed microfluidic disc, a mini centrifuge, and a mini block heater, allowing on-site deployment for SARS-CoV-2 detection. The disc is one-step 3D-printed, avoiding … More One-step 3D-printed microfluidic disc for multiplexed detection of SARS-CoV-2

Self-Introduction (Dr. Xiong Ding)

My researches are mainly dedicated to the interdisciplinary studies of efficient and easy-to-use molecular diagnostics for pathogen identification, food safety monitoring, early cancer detection, and so on. In addition to developing sensitive and specific DNA/RNA detections using existing PCR/digital PCR and isothermal amplification techniques (LAMP, SDA, NASBA, EXPAR, RCA, HRCA, and RPA), I would like … More Self-Introduction (Dr. Xiong Ding)