Two-step extraction with polar solvents and nonpolar solvents was an effective comprehensive extraction for antioxidant and essential oil of rosemary Rosmarinus officinalis l.
极性溶剂和非极性溶剂的两步提取法是迷迭香抗氧化剂和精油综合提取的有效方法，操作简单，容易实施。
The effects of nitrogen fertilizer at different levels on the growth, the overground yield and content of essential oil with the wild Dracocephalum moldavica L.
为试验材料，研究了不同施氮量对香青兰生长发育、地上部干草产量及挥发油含量的影响。
Objective: to study the chemical constituents of the essential oil of Inula helenium L. were extracted by steam distillation (SD) and supercritical-CO2 fluid (SFE).
目的：研究土木香挥发油的化学成分，并比较水蒸气蒸馏提取(SD)与超临界CO2萃取(SFE)所得土木香挥发性成分的差异。
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