Ultrasonic oxidation provides the degradation of a wide range of water pollutants to the final products defined as carbon dioxide, short-chain organic acids, and inorganic ions, typically less toxic and favorable to biodegradation. In this study, it was investigated the application of novel ultrasonic reactor that allows the several combinations of low (20Â kHz and 40Â kHz) and high frequency ultrasonic piezoceramic transducer (578Â kHz, 862Â kHz and 1142Â kHz) to degrade two main cyanobacterial toxins, Microcystin-RR (MC-RR) and Microcystin-LR (MC-LR). A plate transducer operating at different frequencies (40Â kHz or 578Â kHz/862Â kHz/1142Â kHz) was combined with a probe (20Â kHz) as well as two plate transducers 40Â kHz and 578Â kHz/862Â kHz/1142Â kHz were combined to provide dual frequency ultrasonic reactor (DFUR).
View Article and Find Full Text PDFThe development of effective methods for the surveillance of seasonal respiratory viruses is required for the timely management of outbreaks. We aimed to survey Influenza-A, Influenza-B, RSV-A, Rhinovirus and SARS-CoV-2 surveillance in a tertiary hospital and a campus over 5 months. The effectiveness of air screening as an early warning system for respiratory viruses was evaluated in correlation with respiratory tract panel test results.
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