The story of a persistent scientist

Zeng Chengkui, a late academician of China Academy of Sciences, was a world-famous marine biologist, algae scientist and one of the founders of China Algebra.

Zeng Lao once went to the United States to participate in academic activities, and received an invitation from a teacher when he was studying in the United States 50 years ago. After meeting the 90-year-old professor, Zeng Lao was very surprised, but he was still not sure whether the old professor really remembered himself. "Why don't you remember? You are the China student who stays out all night! " It turned out that Zeng Lao's hard work and diligence when he was studying in the United States was the most famous in the school at that time. "At that time, your diligence was well known in school!" The old professor recalled affectionately.

Justus von Liebig. In the article, he tried to burn seaweed into ashes, soak it in hot water, and then introduce chlorine into it, so that iodine in seaweed can be extracted. But he found that a layer of brown liquid was deposited at the bottom of the remaining residue, which would have a pungent smell when collected. He repeated the experiment and got the same result. Therefore, it calls this liquid "iodine chloride". A few years later, he saw a paper saying that a young man in China had done the same experiment with him, but he didn't stop. He informed the Paris Academy of Sciences of this new element and named it "bromine". After reading it, he regretted it. He said: "From now on, I will never draw conclusions out of thin air unless there is a very reliable experiment." Later, Justus von Liebig learned a lesson and became a giant in the history of chemistry because he was good at finding problems from abnormal phenomena and finding solutions through experiments.