中世纪人口中的下骨质密度及其与稳定同位素 δ13C 和 δ15N 的关系
Concepción López-Leyva1, Silvia Jiménez-Brobeil2, Antonio Magán-Fernández1
1Department of Periodontics, School of Dentistry, University of Granada, Granada, Spain.
Odontology
|July 6, 2024
概括
中世纪和现代下的骨质密度相似,使用放射形态指数进行评估. 中世纪的骨密度与δ15N同位素水平相反相关,这表明饮食或环境联系.
科学领域:
- 人类学是人类学.
- 法医人类学 法医人类学
- 放射学 放射学是一门学科.
背景情况:
- 评估下骨质量对于了解骨健康和人口差异至关重要.
- 放射形态指数为骨遗骸骨密度评估提供了定量方法.
- 稳定同位素分析提供了对饮食和环境的见解,可能与骨健康有关.
研究的目的:
- 使用数字骨架影像,比较中世纪和现代人口之间的下骨质量.
- 为了将中世纪下骨中的骨质与稳定的同位素数据 (δ13C和δ15N) 相对应.
主要方法:
- 对15个中世纪和15个现代下进行了一项观察性,横截面研究.
- 骨质密度的测量是使用下皮层宽度指数 (MCW) 和下全景指数 (PMI).
- 稳定同位素分析 (δ13C和δ15N) 在中世纪样本上进行,并与放射形态指数相关联.
主要成果:
- 在中世纪和现代人口 (p=0.820和p=0.575,分别) 之间没有发现MCW和PMI的显著差异.
- 在中世纪组中观察到MCW和PMI与δ15N同位素之间的负相关性 (rs=-0.56到-0.61,p<0.05).
- 与δ13C同位素没有发现显著的相关性.
结论:
- 根据MCW和PMI的评估,下骨质量在研究的中世纪和现代人群之间保持一致.
- 中世纪人口中的δ15N和骨质之间的反相关性表明饮食/环境和骨密度之间存在联系.
相关概念视频
Mass Spectrometry: Isotope Effect
2.0K
Most elements exist in nature as a mixture of isotopes. The isotopes differ in weight due to their respective number of neutrons. The molecular weight of a molecule is different depending on the specific isotope of its elements involved. As a result, the mass spectrum of the molecule exhibits peaks from the same fragment at multiple positions. The positions of these mass signals depend on the difference between the molecular mass. Furthermore, the intensity of these signals is dependent on the...
2.0K
Bone Disorders
3.5K
Aging and its effect on bone remodeling is the most common cause of bone disorders. In young and healthy people, bone deposition and resorption happen at an equal rate to maintain optimal bone health.
Bone deposition is also affected by the levels of sex hormones like estrogen and testosterone that promote osteoblast activity and bone matrix synthesis. When the level of these hormones decreases due to aging, it causes a reduction in bone deposition. As a result, bone resorption by osteoclasts...
Bone deposition is also affected by the levels of sex hormones like estrogen and testosterone that promote osteoblast activity and bone matrix synthesis. When the level of these hormones decreases due to aging, it causes a reduction in bone deposition. As a result, bone resorption by osteoclasts...
3.5K
High-Resolution Mass Spectrometry (HRMS)
1.3K
The resolution of a mass spectrometer depends on the efficiency of separating ions with different ion masses. The mass of an atom is approximated to the sum of the masses of protons and neutrons inside, considering the masses of protons and neutrons as equal. However, the masses of the proton (1.6726 × 10−24 g) and neutron (1.6749 × 10−24 g) are not truly equal. There is a minor error in the expression of atomic masses relative to the simplest atom of hydrogen. For...
1.3K
Carbon-13 (¹³C) NMR: Overview
5.6K
Carbon-13 is a naturally occurring NMR-active isotope of carbon with a low natural abundance of 1.1%. In contrast, carbon-12 is the most abundant isotope of carbon with zero nuclear spin. Therefore, it is NMR inactive. The gyromagnetic ratio of carbon-13 is smaller than that of protons. As a result, carbon-13 resonance is about 6000 times weaker than proton resonance. For a given magnetic field strength, the resonance frequency of carbon-13 is about one-fourth of the resonance frequency for...
5.6K


