ATTEMPTS to count small particles suspended in fluid flowing through a tube have not hitherto been very successful. With particles such as red blood cells the experimenter must choose between a wide ...

Thank you to everyone who hosted watch parties and celebrated National Chemistry Week 2025 with us! If you were unable to attend live, ACS invites you to use the recording of this year's event ...

A secure electronic voting system with real-time authentication and keypad enables accurate, tamper-proof voting through ...

Do you need to repay your PPP loan? Matt Webber is an experienced personal finance writer, researcher, and editor. He has published widely on personal finance, marketing, and the impact of technology ...