采用水蒸气蒸馏法对贯叶连翘花中挥发油进行提取,以挥发油提取率为响应值,通过单因素实验对影响提取工艺的参数(浸泡时间、提取时间和料液比)进行考察,并利用三因素三水平响应曲面实验法确定了贯叶连翘花中挥发油的最优提取工艺,即浸泡...采用水蒸气蒸馏法对贯叶连翘花中挥发油进行提取,以挥发油提取率为响应值,通过单因素实验对影响提取工艺的参数(浸泡时间、提取时间和料液比)进行考察,并利用三因素三水平响应曲面实验法确定了贯叶连翘花中挥发油的最优提取工艺,即浸泡时间19 h,液固比9∶1 m L/g,提取时间10 h,该条件下贯叶连翘花中挥发油的提取率为1.03 m L/100 g,与理论值1.10 m L/100 g仅相差2.73%。同时测试了该挥发油的抑菌活性,其对大肠杆菌、金黄色葡萄球菌和枯草芽孢杆菌的抑菌圈直径分别为9、10、12 mm,表明贯叶连翘花中挥发油有一定的抑菌活性。展开更多
Three steam distillation devices (D-1, D-2 and D-4) or one simultaneous distillation (D-3, water-diethyl ether) as well as the process of CO2-SFE (Supercritical fluid extraction) were adopted in extraction of essentia...Three steam distillation devices (D-1, D-2 and D-4) or one simultaneous distillation (D-3, water-diethyl ether) as well as the process of CO2-SFE (Supercritical fluid extraction) were adopted in extraction of essential oils from Chinese-fir (Cunninghamia lancedata (Lamb) Hook.) and the chemical components of the extracted essential oil were analyzed by Gas chromatograph-MS analyses. The results showed that the essential oil could be almost extracted out within 2 hours and the device-3 had the highest extraction efficiency. The major chemical component of the oil was cedrol. The yield of the extracted essential oils from Chinese fir decreased gradually with the increase of the distillation time. The best condition for extraction by means of CO2-SFE is 100 kg·cm?2 in pressure and 40°C in temperature for. Keywords Chinese fir - Essential oil - Cedrol - Supercritical fluid extraction CLC number S781.4 Document code A Foundation item: This paper was support by the Key Foundation Research Project (G1999016001) of China and the Japan International Cooperation AgencyBiography: HUANG Luo-hua (1957-), male, Research associate, Research Institute of Wood Industry, Chinese Academy of forestry, Beijing 100091, P. R. ChinaResponsible editor: Song Funan展开更多
In this paper,Cassava dregs are an outgrowth produced during starchy production which uses cassava as raw material.It is usually dropped out or used as cheap feedstuff.In order to make the best use of cassava dregs,in...In this paper,Cassava dregs are an outgrowth produced during starchy production which uses cassava as raw material.It is usually dropped out or used as cheap feedstuff.In order to make the best use of cassava dregs,increase industrie'sbenefits and reduce castoff this study developed a new technique which used cassava dregs as raw material to produce distilled spirits based on cassava dregs characteristics.The technique adopt solid-ferment procedure.At first,the ferment is processed by solid-state distilling,and then rectification extra care refine-ment;at last the tequila was produced with characteristics of simple and elegant fragrance and mellow-tasting.展开更多
目的石菖蒲挥发油无溶剂微波提取法的工艺优化及其成分分析。方法通过L9(34)正交试验,以α-细辛醚提取量、挥发油体积、3种细辛醚的百分比之和作为评价标准,进行综合评分,优选石菖蒲挥发油无溶剂微波提取法最佳提取工艺;采用GC-MS法对...目的石菖蒲挥发油无溶剂微波提取法的工艺优化及其成分分析。方法通过L9(34)正交试验,以α-细辛醚提取量、挥发油体积、3种细辛醚的百分比之和作为评价标准,进行综合评分,优选石菖蒲挥发油无溶剂微波提取法最佳提取工艺;采用GC-MS法对最佳工艺提取的挥发油定性分析,利用峰面积归一化法分析其主要成分,并与水蒸气蒸馏法提取的挥发油对比。结果 2种方法提取的挥发油中成分组成基本相同,石菖蒲中主要挥发性成分为α-细辛醚、β-细辛醚和γ-细辛醚,其在无溶剂微波提取法的百分比为4.12%、55.11%和10.54%,而水蒸气蒸馏提取法则分别为5.39%、47.03%和9.15%。从提取效率来看,无溶剂微波法提油0.235 m L耗时5 min,得α-细辛醚提取量为31.99 mg;水蒸气蒸馏法提油0.175 m L,需要1h,得α-细辛醚提取量为29.09 mg。结论无溶剂微波提取法是一种新的挥发油提取方法,可以缩短提取时间,增加提取效率。展开更多
文摘采用水蒸气蒸馏法对贯叶连翘花中挥发油进行提取,以挥发油提取率为响应值,通过单因素实验对影响提取工艺的参数(浸泡时间、提取时间和料液比)进行考察,并利用三因素三水平响应曲面实验法确定了贯叶连翘花中挥发油的最优提取工艺,即浸泡时间19 h,液固比9∶1 m L/g,提取时间10 h,该条件下贯叶连翘花中挥发油的提取率为1.03 m L/100 g,与理论值1.10 m L/100 g仅相差2.73%。同时测试了该挥发油的抑菌活性,其对大肠杆菌、金黄色葡萄球菌和枯草芽孢杆菌的抑菌圈直径分别为9、10、12 mm,表明贯叶连翘花中挥发油有一定的抑菌活性。
基金The Key Foundation Research Project (G1999016001) of China and the Japan International Cooperation Agency
文摘Three steam distillation devices (D-1, D-2 and D-4) or one simultaneous distillation (D-3, water-diethyl ether) as well as the process of CO2-SFE (Supercritical fluid extraction) were adopted in extraction of essential oils from Chinese-fir (Cunninghamia lancedata (Lamb) Hook.) and the chemical components of the extracted essential oil were analyzed by Gas chromatograph-MS analyses. The results showed that the essential oil could be almost extracted out within 2 hours and the device-3 had the highest extraction efficiency. The major chemical component of the oil was cedrol. The yield of the extracted essential oils from Chinese fir decreased gradually with the increase of the distillation time. The best condition for extraction by means of CO2-SFE is 100 kg·cm?2 in pressure and 40°C in temperature for. Keywords Chinese fir - Essential oil - Cedrol - Supercritical fluid extraction CLC number S781.4 Document code A Foundation item: This paper was support by the Key Foundation Research Project (G1999016001) of China and the Japan International Cooperation AgencyBiography: HUANG Luo-hua (1957-), male, Research associate, Research Institute of Wood Industry, Chinese Academy of forestry, Beijing 100091, P. R. ChinaResponsible editor: Song Funan
文摘In this paper,Cassava dregs are an outgrowth produced during starchy production which uses cassava as raw material.It is usually dropped out or used as cheap feedstuff.In order to make the best use of cassava dregs,increase industrie'sbenefits and reduce castoff this study developed a new technique which used cassava dregs as raw material to produce distilled spirits based on cassava dregs characteristics.The technique adopt solid-ferment procedure.At first,the ferment is processed by solid-state distilling,and then rectification extra care refine-ment;at last the tequila was produced with characteristics of simple and elegant fragrance and mellow-tasting.
文摘目的石菖蒲挥发油无溶剂微波提取法的工艺优化及其成分分析。方法通过L9(34)正交试验,以α-细辛醚提取量、挥发油体积、3种细辛醚的百分比之和作为评价标准,进行综合评分,优选石菖蒲挥发油无溶剂微波提取法最佳提取工艺;采用GC-MS法对最佳工艺提取的挥发油定性分析,利用峰面积归一化法分析其主要成分,并与水蒸气蒸馏法提取的挥发油对比。结果 2种方法提取的挥发油中成分组成基本相同,石菖蒲中主要挥发性成分为α-细辛醚、β-细辛醚和γ-细辛醚,其在无溶剂微波提取法的百分比为4.12%、55.11%和10.54%,而水蒸气蒸馏提取法则分别为5.39%、47.03%和9.15%。从提取效率来看,无溶剂微波法提油0.235 m L耗时5 min,得α-细辛醚提取量为31.99 mg;水蒸气蒸馏法提油0.175 m L,需要1h,得α-细辛醚提取量为29.09 mg。结论无溶剂微波提取法是一种新的挥发油提取方法,可以缩短提取时间,增加提取效率。
