Publications by authors named "Jing-Lan Xu"
Article Synopsis
- The study aimed to examine how visibility of the mandibular third molar root pulp changes with age in young adults in East China, particularly to see if this could help determine if someone is 18 or older.
- A sample of 1,280 panoramic dental images from individuals aged 15 to 30 was analyzed using a four-stage classification method to assess root pulp visibility, with age distributions noted at each stage.
- Results showed that the pulp visibility stages appeared at specific ages, indicating that individuals in stages 1 to 3 were all over 18, suggesting this method can effectively estimate an individual's age based on dental images.
Two new steroidal ketones (1, 2), together with 10 known steroids (3-12) and five known steroidal saponins (13-17), have been obtained from the pitch of Tetrapanax papyrierus. The structures of 1 and 2 were elucidated as 3β-hydroxystigmast-8, 22-diene-7,11-dione and 3β-hydroxystigmast-8-ene-7,11-dione by IR, HR-ESI-MS, 1D and 2D NMR techniques. Except for 4, 14, 15, 16, 13 compounds reported in this paper were isolated from Tetrapanax papyriferus for the first time.
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