挥发油

Methods Essential oil from the fresh Canarium album Raeusch leaves was extracted by steam distillation and were analyzed by gas chromatography-mass spectrometry.

方法采用水蒸气蒸馏法提取新鲜橄榄叶的挥发油，经气相色谱-质谱联用仪分析，归一化法测得各组分的相对含量。

AbstractObjectiveTo analyze the constituents of the essential oil from fresh Canarium album Raeusch leaves.

目的分析新鲜橄榄叶挥发油成分。

The process of the formation of volatile oil in fruit can be divided into three stages: development stage, isolation stage, and disintegration stage; the endocrina structure of the fruit was lysigenous secretory canel.

孜然芹果实中挥发油的形成主要经历了油细胞的发育、分离、解体三个时期；果实中内分泌结构为溶生式的分泌道。

This method is simple, precie, accurate, and it can be used for determination of Capparis spinosa L.

所建方法简便快捷、精密度高、准确性好，可用于维药刺山柑种子中挥发油的测定。

METHODS Volatile oil was extracted from Capparis spinosa L seeds using steam distillation method and the extractive rate was 1.12%.

用水蒸气蒸馏法提取种子中的挥发油并采用GC-MS技术分离鉴定其中的挥发性成分。

OBJECTIVE To extract volatile oil from Capparis spinosa L seeds and evalvate by GC-MAS chromatography-mass GC-MS.

目的 提取分析刺山柑种子中的挥发油。

The components were calculated with normalization method and compared with the references. Result: 68 compounds have been identified; comparing with the water decoction, the amount of fatty acids was decreased while the amount of terpenes was increased; at the mean while, carene and pinene which were abundant in single herb were not detected.

结果：从YL2000醇提制剂中初步分离鉴定了68个成分；同水煎剂相比，醇提制剂提高了挥发油的得率，去除了大量脂肪酸类成分，但保留了水煎剂中的88％的萜类成分，并将其含量提高了约6倍；同单味药材相比，醇提制剂和水煎剂均富集了萜类成分而大大降低了蒎烯和蒈烯类成分的含量。

The 26 terpenoids in the essential oil extracted from the leaves of Phoebe faberi have been identified by GC-MS technique, such as-S--3,7,11-trimethyl-1,6,10-dodecatrien-3-ol (39.34%),β-caryophyllene (29.18%),-zingiberene (5.16%) and caryophyllene oxide (4.21%).

利用GC-MS联用技术从竹叶楠叶挥发油中鉴定了26个萜类化合物，如---3，7，11-三甲基-1，6，10-十二碳三烯-3-醇（相对含量39.34%）、β-丁香烯（29.18%）、姜烯（5.16%）和氧化丁香烯（4.21%）。

Combined analysis of the essential oil of Chenopodium ambrosioides L.

土荆芥挥发油的化学成分分析。

The determination method and fingerprints method can be use to control the quality of the volatile oil from Chenopodium ambrosioides L..

所建立的挥发油含量测定方法和指纹图谱方法可作为土荆芥油内在质量控制的标准。

According to the clear water experiment, aeration performance of the new equipment is good with high total oxygen transfer coefficient and oxygen utilization ratio.

曝气设备的动力效率在叶轮转速为120rpm～150rpm时取得最大值，此时氧利用率和充氧能力也具有较高值。

The environmental stability of that world - including its crushing pressures and icy darkness - means that some of its most famous inhabitants have survived for eons as evolutionary throwbacks, their bodies undergoing little change.

稳定的海底环境─包括能把人压扁的压力和冰冷的黑暗─意谓海底某些最知名的栖居生物已以演化返祖的样态活了万世，形体几无变化。