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easured in saline simulated and real seawater samples at nM concentrations in less than 5 min. The present investigation provides a new alternative to the current standard colorimetric methods to detect low phosphate concentrations, showing the potential to be used for monitoring nutrients in oligotrophic seawater. Little is known about the views of U.S. youth on COVID-19 or their use of face coverings. Closing this gap could facilitate messaging to promote COVID-19 risk mitigation behaviors. In July 2020, a five-question text message su
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