High mass concentration of lead induced adventitious roots.
高质量浓度铅诱导不定根产生。
Nutrients are absorbed mainly through roots of plants by interception, mass-flow and diffusion.
植物主要是通过根系吸收养分，一般通过根系截获、质流和扩散三种方式。
Electrospray ionization tandem mass spectrometry(ESI-MSn) was applied for simultaneous determination of norditerpenoid alkaloids in the roots of Aconitum kusnezoffii without any chemical isolation.
由于这些生物碱的结构相似，在电喷雾串联质谱中碎裂方式相同，因此根据电喷雾串联质谱结果确定了这些生物碱的结构。
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