There was no single catalyst for the brutal selloff. (blackrockblog.com)
There was no single catalyst for the recent selloff, but an underlying investor concern is whether the slowdown in China and other emerging markets will drag the United States into a recession. (blackrockblog.com)
Stanford University scientists have invented a low - cost water splitter that uses a single catalyst to produce both hydrogen and oxygen gas 24 hours a day, seven days a week. (sciencedaily.com)