Three new highly oxygenated nortriterpenoids,wilsonianadilactones D-F(1-3),were isolated from the leaves and stems of Schisandra wilsoniana.Their structures were established by means of spectroscopic analysis.Compound...Three new highly oxygenated nortriterpenoids,wilsonianadilactones D-F(1-3),were isolated from the leaves and stems of Schisandra wilsoniana.Their structures were established by means of spectroscopic analysis.Compounds 1-3 showed weak anti-HIV-1 activity with the therapeutic index(TI)values(CC50/EC50)greater than 8.16,14.7,and 17.5,respectively.展开更多
Cornus wilsoniana fruit oil is a very important woody oil and is the main raw material of biodiesel.In this study,the oil yield,physicochemical properties,fatty acid composition,rheological properties,thermal stabilit...Cornus wilsoniana fruit oil is a very important woody oil and is the main raw material of biodiesel.In this study,the oil yield,physicochemical properties,fatty acid composition,rheological properties,thermal stability,and Fourier transform infrared(FTIR)spectra of C.wilsoniana fruit oil obtained by subcritical n-butane extraction(SBE)and conventional methods such as pressing extraction(PE)and Soxhlet extraction(SE)were determined to study the influence of different extraction methods on the quality and yield of C.wilsoniana fruit oil.The oil yield of SBE(19.47%)was higher than that of PE(9.93%)but slightly lower than that of SE(21.08%).All of the extracted oils exhibited similar physicochemical properties,and the SBE oil was richer in polyunsaturated fatty acids(PUFA)than that of the PE oil,with an approximate 1:2 ratio of total saturated fatty acids against unsaturated fatty acids.The results of rheological behavior and thermal stability showed that all extracted oils had Newtonian flow characteristics,wherein the SBE oil exhibited lower viscosity and higher thermal stability.Furthermore,scanning electron microscopy(SEM)images of the surface topography indicated that different oil extraction methods will affect the residual oil content of the C.wilsoniana fruit powder.Compared with PE,the pores on the surface of the C.wilsoniana fruit powder after oil extraction were clearly visible,indicating that the driving force of SBE for oil extraction is stronger than that of PE.Based on the above results,it is implied that SBE is the best of the three methods for extracting C.wilsoniana fruit oil and can be potentially applied to extract other edible oils.展开更多
Spray drying was used to produce microencapsulated Wilson’s dogwood(Swida wilsoniana)oil.The influences of the emulsifier and wall materials on the encapsulation were studied in order to produce high quality encapsul...Spray drying was used to produce microencapsulated Wilson’s dogwood(Swida wilsoniana)oil.The influences of the emulsifier and wall materials on the encapsulation were studied in order to produce high quality encapsulated S.wilsoniana oil.The emulsions were prepared by using lecithin(L)and Tween 80(T)with different hydrophilic-lipophilic balance.Results indicated that the stable emulsion was obtained using T and L as the compound emulsifier at a ratio of 4/6(w/w).By virtue of the compound emulsifier(T/L 4/6),the microencapsulation efficiency(MEE)reached 91%,and the oil loading up to 35%was achieved.We also examined the influence of the wall materials on the microencapsulation of S.wilsoniana oil.All the three wall materials exhibited high MEE(>85%),and the highest MEE(95.20%)was obtained with sodium caseinate/lactose.All the S.wilsoniana oil encapsulated with the three wall materials exhibited nearly spherical microcapsules without pores or cracks,thus protecting the oil from oxygen.展开更多
目的研究土一枝蒿药材的指纹图谱和相关成分含量测定方法。方法参照2020年版《中国药典(四部)》测定药材样品的水分、总灰分、水溶性浸出物含量;采用高效液相色谱(HPLC)法测定药材样品中3个成分的含量,色谱柱为CAPCELL PAK C18MGⅡ(S-5)...目的研究土一枝蒿药材的指纹图谱和相关成分含量测定方法。方法参照2020年版《中国药典(四部)》测定药材样品的水分、总灰分、水溶性浸出物含量;采用高效液相色谱(HPLC)法测定药材样品中3个成分的含量,色谱柱为CAPCELL PAK C18MGⅡ(S-5)柱(250 mm×4.6mm,5μm),流动相为乙腈-0.1%磷酸溶液(梯度洗脱),流速为0.7mL/min,检测波长为365 nm,柱温为30℃,进样量为10μL。建立10批药材样品的HPLC指纹图谱,采用中药色谱指纹图谱相似度评价系统(2012年130723版)进行相似度评价,确定共有峰。结果10批药材样品的HPLC图谱有14个共有峰,相似度为0.941~0.997,确认的3个成分分别为异荭草素、异牡荆苷、槲皮素-4′-O-β-D-葡萄糖苷,其质量浓度分别在12.55~200.82μg/mL(r=0.9999)、7.20~115.28μg/mL(r=0.9995)、6.14~98.20μg/mL(r=0.9998)范围内与峰面积线性关系良好;精密度、稳定性、重复性试验结果的RSD均小于3.0%;平均加样回收率分别为97.92%,101.37%,103.92%,RSD分别为1.38%,2.33%,1.26%(n=6)。10批药材样品中上述3个成分的平均含量分别为1.4210,0.4220,0.2834mg/g;水分含量为10.15%~12.23%,总灰分含量为5.24%~13.29%,水溶性浸出物含量为7.37%~11.54%。结论所建标准可用于土一枝蒿药材的质量控制。展开更多
基金This project was supported financially by the NSFC(No.20802082 and 30830115)the projects from the Chinese Academy of Sciences(KSCX2-EW-Q-10,KSCX1-YW-R-24 and KSCX2-YW-R-185)+2 种基金the Major State Basic Research Development Program of China(No.2009CB522303 and 2009CB940900)the Yong Academic and Technical Leader Rising Foundation of Yunnan Province(2006PY01-47)the Natural Science Foundation of Yunnan Province(2005XY04 and 2006B0042Q).
文摘Three new highly oxygenated nortriterpenoids,wilsonianadilactones D-F(1-3),were isolated from the leaves and stems of Schisandra wilsoniana.Their structures were established by means of spectroscopic analysis.Compounds 1-3 showed weak anti-HIV-1 activity with the therapeutic index(TI)values(CC50/EC50)greater than 8.16,14.7,and 17.5,respectively.
基金the National Key Research and Development Projects of China(2019Y FB1504001)for the financial supports of this research
文摘Cornus wilsoniana fruit oil is a very important woody oil and is the main raw material of biodiesel.In this study,the oil yield,physicochemical properties,fatty acid composition,rheological properties,thermal stability,and Fourier transform infrared(FTIR)spectra of C.wilsoniana fruit oil obtained by subcritical n-butane extraction(SBE)and conventional methods such as pressing extraction(PE)and Soxhlet extraction(SE)were determined to study the influence of different extraction methods on the quality and yield of C.wilsoniana fruit oil.The oil yield of SBE(19.47%)was higher than that of PE(9.93%)but slightly lower than that of SE(21.08%).All of the extracted oils exhibited similar physicochemical properties,and the SBE oil was richer in polyunsaturated fatty acids(PUFA)than that of the PE oil,with an approximate 1:2 ratio of total saturated fatty acids against unsaturated fatty acids.The results of rheological behavior and thermal stability showed that all extracted oils had Newtonian flow characteristics,wherein the SBE oil exhibited lower viscosity and higher thermal stability.Furthermore,scanning electron microscopy(SEM)images of the surface topography indicated that different oil extraction methods will affect the residual oil content of the C.wilsoniana fruit powder.Compared with PE,the pores on the surface of the C.wilsoniana fruit powder after oil extraction were clearly visible,indicating that the driving force of SBE for oil extraction is stronger than that of PE.Based on the above results,it is implied that SBE is the best of the three methods for extracting C.wilsoniana fruit oil and can be potentially applied to extract other edible oils.
基金This work was supported by Jiangsu Province Biomass Energy and Materials Laboratory,China(No.JSBEM-S-201603)National Key Research and Development Program of China(No.2017YFD0400900).
文摘Spray drying was used to produce microencapsulated Wilson’s dogwood(Swida wilsoniana)oil.The influences of the emulsifier and wall materials on the encapsulation were studied in order to produce high quality encapsulated S.wilsoniana oil.The emulsions were prepared by using lecithin(L)and Tween 80(T)with different hydrophilic-lipophilic balance.Results indicated that the stable emulsion was obtained using T and L as the compound emulsifier at a ratio of 4/6(w/w).By virtue of the compound emulsifier(T/L 4/6),the microencapsulation efficiency(MEE)reached 91%,and the oil loading up to 35%was achieved.We also examined the influence of the wall materials on the microencapsulation of S.wilsoniana oil.All the three wall materials exhibited high MEE(>85%),and the highest MEE(95.20%)was obtained with sodium caseinate/lactose.All the S.wilsoniana oil encapsulated with the three wall materials exhibited nearly spherical microcapsules without pores or cracks,thus protecting the oil from oxygen.
文摘目的研究土一枝蒿药材的指纹图谱和相关成分含量测定方法。方法参照2020年版《中国药典(四部)》测定药材样品的水分、总灰分、水溶性浸出物含量;采用高效液相色谱(HPLC)法测定药材样品中3个成分的含量,色谱柱为CAPCELL PAK C18MGⅡ(S-5)柱(250 mm×4.6mm,5μm),流动相为乙腈-0.1%磷酸溶液(梯度洗脱),流速为0.7mL/min,检测波长为365 nm,柱温为30℃,进样量为10μL。建立10批药材样品的HPLC指纹图谱,采用中药色谱指纹图谱相似度评价系统(2012年130723版)进行相似度评价,确定共有峰。结果10批药材样品的HPLC图谱有14个共有峰,相似度为0.941~0.997,确认的3个成分分别为异荭草素、异牡荆苷、槲皮素-4′-O-β-D-葡萄糖苷,其质量浓度分别在12.55~200.82μg/mL(r=0.9999)、7.20~115.28μg/mL(r=0.9995)、6.14~98.20μg/mL(r=0.9998)范围内与峰面积线性关系良好;精密度、稳定性、重复性试验结果的RSD均小于3.0%;平均加样回收率分别为97.92%,101.37%,103.92%,RSD分别为1.38%,2.33%,1.26%(n=6)。10批药材样品中上述3个成分的平均含量分别为1.4210,0.4220,0.2834mg/g;水分含量为10.15%~12.23%,总灰分含量为5.24%~13.29%,水溶性浸出物含量为7.37%~11.54%。结论所建标准可用于土一枝蒿药材的质量控制。
