化条件对丝结构,碳和同位素比率的影响
Hao Li1,2, Yujie He1,2, Liling Jia3
1School of Materials Science and Engineering, Zhejiang Sci-Tech University, Hangzhou, China.
PloS one
|September 21, 2023
概括
稳定同位素分析显示,化条件显著影响丝纤维中的碳同位素值. 这些发现对于准确追踪古代织品的起源至关重要.
科学领域:
- 材料科学 材料科学 材料科学
- 考古测量考古测量方法
- 生物化学 生物化学
背景情况:
- 稳定同位素技术为追踪古代织品提供了优势,包括痕迹指示,快速检测和准确性.
- 研究不同状况 (温度,湿度) 对同位素结合的影响至关重要,因为这些因素即使在类似息地内也会影响.
研究的目的:
- 分析不同化温度和湿度水平对丝纤维中同位素结合的影响.
- 在各种环境条件下研究子蛋白的二次结构和同位素合并模式.
主要方法:
- 丝纤维在受控的温度和湿度条件下进行加工.
- 分析包括蛋白的二次结构和稳定同位素合并模式 (特别是碳和同位素).
主要成果:
- 丝碳同位素值的偏差在不同的化条件下达到了0.76‰,在单一丝纤维中达到了2.75‰.
- 在化过程中,在丝纤维的不同位置观察到13C同位素的耗尽,导致δ13C值降低.
- 碳同位素的变化与不同比例的素和丝纤维素相关.
- 在脱皮中没有发现同位素比率的显著差异.
结论:
- 13C同位素优先富含素,而15N同位素则富含丝纤维素.
- 这些结果为使用稳定同位素分析追踪丝材料的来源提供了基础数据.
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