Objective to prepare the Puerarin phytosomes and study its chemical characteristic.

目的研究制备葛根素磷脂复合物，并确定其化学特性。

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The chemical characteristic of the groundwater in Xingren basin of Ningxia was studied.

对宁夏西部兴仁盆地地下水水化学特征进行了研究。

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Methods To distinguish it by its source and property, microscope, physical and chemical characteristic.

方法根据山刺玫根来源、性状、显微、理化对其鉴别。

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Soil samples can be taken in which you can look for either residue of a chemical agent or the product's characteristic of when an agent degrades.

BBC: Syria chemical weapons claims: UK and US tread cautiously

They would collect environmental samples such as soil, rubble or vegetation that may have been in contact with the chemical warfare agent and may still contain characteristic degradation products or even traces of it.

BBC: How to investigate chemical weapons allegations

The Anthropocene's equivalent of iridium is nitrogen - although there will be other candidates (such as heavy metals, and carbon isotope ratios characteristic of fossil fuel emissions) for geochemists of the far future to identify as the chemical signature of the new epoch's dawn.

BBC: Leaving our mark: Fossils of the future