The essential oil from the flowers of Pyrus betulaefolia Bunge was abstracted by steam-stilling and analyzed by capillary GC-MS method.
采用水蒸气蒸馏法从杜梨花中提取挥发油，用气相色谱-质谱法对化学成分进行鉴定。
A widely cultivated tree (Pyrus communis) in the rose family, having glossy leaves, white flowers grouped in a corymb, and edible fruit.
梨树一种蔷薇科的普遍种植的乔木(梨属西洋梨)，具有光质叶片，白色的伞状花簇，果实可食用。
Main floral characteristics of Xiangli (Pyrus bretschneideri Rehd) were observed and pollen activity was synthetically studied in the paper.
在观察香梨的花器特征的基础上，对花粉量、花粉生活力及花粉萌芽力进行了综合研究。
The fruit of Western Pear (Pyrus communis L.) can produce a great deal endogenous ethylene only after harvested and start the ripening of the fruit.
西洋梨果实只有在采收后才能大量产生内源乙烯，启动果实的完全成熟，因而后熟是西洋梨生产过程中的一个关键环节。
It explained that reformed CTAB method could extract the genomic DNA of Pyrus successfully, and the optimum RAPD reaction system could amplificate RAPD in Pyrus L…
说明改良的CTAB法能成功用于梨属植物DNA提取，建立的最佳反应体系可用于梨属植物RAPD扩增。
Microwave, water bath and ultrasonic extraction were employed to extract the polysaccharide from Pyrus Betulaefolia Bge. leaf and anthrone-sulphuric acid colorimetry was used to determine its content.
分别采用微波、水浴及超声波3种方法提取杜梨叶片多糖，用蒽酮-硫酸比色法测定多糖的含量。
Microwave, water bath and ultrasonic extraction were employed to extract the polysaccharide from Pyrus Betulaefolia Bge. leaf and anthrone-sulphuric acid colorimetry was used to determine its content.
分别采用微波、水浴及超声波3种方法提取杜梨叶片多糖，用蒽酮-硫酸比色法测定多糖的含量。
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