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Updated: May 3, 2026

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简要介绍:一种新方法,以高时间分辨率测量牙中的同位素

Tanya M Smith1,2, Janaína N Ávila1,3, Manish Arora4

  • 1Griffith Centre for Social and Cultural Research, Griffith University, Gold Coast, Queensland, Australia.

American journal of biological anthropology
|June 26, 2024
PubMed
概括

新的SIMS技术精确测量牙中的同位素 (δ15N),揭示了婴儿养和断奶年龄的详细信息. 这种方法在理解人类早期发育的传统技术上提供了显著的改进.

关键词:
,和是最重要的元素.生命史 生命史 的人生史牛奶 牛奶 牛奶 牛奶护理 护理 护理是的组成部分.断奶 断奶 断奶 断奶 断奶

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¹H NMR of Labile Protons: Temporal Resolution01:10

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Protons bonded to heteroatoms such as nitrogen and oxygen exhibit a range of chemical shift values. This is due to the varying degree of hydrogen bonding between the proton and the heteroatom in other molecules. The extent of hydrogen bonding affects the electron density around the proton, thereby giving different chemical shift values for the protons in the proton NMR spectrum.
The –OH proton in alcohols typically appears in the range of δ 2 to 5 ppm but can vary depending on the...
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