"杜梨"是个多义词，它可以指杜梨（蔷薇目蔷薇科植物）,杜梨（中药）。
杜梨 （Pyrus betulifolia Bunge）是蔷薇科 梨属 落叶乔木，木材致密可作各种器物，树皮含鞣质，可提制栲胶
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.... 白梨 P. bretschneideri Rehd. 杜梨 P. betulifolia Bge. 褐梨 P. phaeocarpa Rehd. ...
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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。
The essential oil from the flowers of Pyrus betulaefolia Bunge was abstracted by steam-stilling and analyzed by capillary GC-MS method.
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.
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