To find out why, researchers used sophisticated X-ray analyses to determine the exact chemical composition of the paint as it browns.
为找出原因，研究人员用精密X射线分析仪测定了变成褐色颜料的精确化学成分。
DTA and X-ray diffraction analyses have been conducted to study the thermal transformation process of Mg-rich montmorillonite.
本文主要采用DTA和X射线衍射分析等测试手段，对富镁蒙脱石加热变化过程进行了研究。
The results of X ray diffraction analyses further proved that compounds (A) and (B) are of two different phases.
射线粉末衍射物相分析的结果又进一步证实了化合物（A）和（B）是两种完全不同的物相。
The X ray diffraction and scanning electron microscope analyses show that the product possesses crystal structure, and the crystallized grain is rectangular and fusiform.
射线衍射和电镜扫描分析表明碳酸稀土产品属晶型结构，为长方体和纺锤形状结晶。
The products were characterized by elemental analyses, MS and X-ray diffraction analysis.
反应产物经过了元素分析、质谱和X射线的表征。
Materials and Methods: The clinic and X-ray manifestation of analyses 3 cases.
材料与方法：综合分析3例骨梗塞的临床及X线表现。
Its structure has been studied through a series of chemical synthesis, preparation of derivatives, degradations and IR analyses, and ultimately determined by X-ray diffraction.
本文用衍生物合成、降解反应、红外光谱、核磁共振谱及x -射线衍射晶体分析法研究了它的化学结构。
The technique which analyses iron oxide, silicon oxide, aluminum oxide from bauxite with fluorescent X-ray spectrometry was established.
建立了X荧光法测定铝土矿中主要成分氧化铁、氧化硅、氧化铝的方法。
Materials and Methods: The clinic and X-ray manifestation of analyses 16 cases.
材料与方法：综合分析16例骨巨细胞瘤的临床及X线表现。
Both the compounds are determined by single crystal structure X-ray diffraction and characterized by IR spectra, TG, elemental analyses and XRD.
两个化合物都通过X -射线单晶衍射确定了它们的结构，并通过IR光谱，TG，元素分析和XRD对它们进行了表征。
It was characterized by IR spectra, TG-DTG, X-ray powder diffraction, as well as chemical and elemental analyses.
通过化学分析、元素分析、IR光谱、TG - DTG及X射线粉末衍射分析等对其进行了物理化学表征。
Furthermore, X-ray single crystal structural analyses were performed for three adducts, whose structures and relative stereochemistry were confirmed.
对三个加成产物进行了X -线单晶结构解析，验证了产物的结构和相对立体化学。
Analyses the cause of the high voltage malfunction of high-frequency for WANDONG 50kW high-frequency X-ray machine and describes the troubleshooting solution for reference.
分析了曾出现过的一次高频发生器故障的产生原因，并介绍了该故障的排除过程。
Analyses the cause of the high voltage malfunction of high-frequency for WANDONG 50kW high-frequency X-ray machine and describes the troubleshooting solution for reference.
分析了曾出现过的一次高频发生器故障的产生原因，并介绍了该故障的排除过程。
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