On July 10th, the final of 2021 Hubei Provincial Science And Technology Explanation Contest sponsored by Hubei Provincial Department of Science and Technology and organized by our school was held in optics Valley Concert Hall, with the theme of "Looking back at a Century: Scientific and Technological Development under the leadership of the Communist Party of China".College of Pharmacy 2019 pharmaceutical undergraduate Li Jiahao participated in the final, won the provincial second prize and "2021 Hubei Province top ten science messenger" title.
In the final, Li jiahao gave a lively and simple explanation on isotope.To determine the age of cultural sites is a common task in archaeological research. To accurately determine the formation time of cultural sites is of great significance to confirm the cultural value of cultural relics or sites and carry out relevant research and analysis.So how can isotopes be used to determine the age of historical sites?"In nature, carbon-14 combines with oxygen to form carbon dioxide, which is absorbed and released by organisms as part of their metabolism to balance carbon-14 with the environment.When organisms die and lose the ability to metabolize, the flow of carbon-14 to the outside world stops, and carbon-14, buried in the earth's carcasses, decays spontaneously into nitrogen-14 over time, with a half-life of 5,730 years.That means that every 5,730 years, the amount of carbon-14 decreases by half."Li Jia Hao tells this way, in the illustrated commentary to the audience to gain new knowledge.
