为了提高辣椒碱溶解度和生物利用度将其制备成微乳,经溶解度实验和伪三元相图确定微乳处方组成和表面活性剂与助表面活性剂的最佳质量比(Km);以粒径和载药量为考察指标,采用星点设计-响应面法优化辣椒碱微乳处方;并对最优处方制备的辣...为了提高辣椒碱溶解度和生物利用度将其制备成微乳,经溶解度实验和伪三元相图确定微乳处方组成和表面活性剂与助表面活性剂的最佳质量比(Km);以粒径和载药量为考察指标,采用星点设计-响应面法优化辣椒碱微乳处方;并对最优处方制备的辣椒碱微乳进行质量评价。辣椒碱微乳最优处方为辣椒碱5.12%,油酸乙酯5.82%,曲拉通X-100和无水乙醇(K_(m)=3∶1)28.54%,加纯化水至5.0 g;制得的微乳为O/W型澄清透明的均一液体,其形态为表面光滑的球形;CAP微乳粒径为16.5±0.17 nm,多分散指数为0.387±0.02,Zeta电位为-12.1±0.12 m V,粘度为33±1.73 m Pa·s;冻融稳定性和离心稳定性良好;红外光谱和差示扫描量热分析表明辣椒碱被包裹在微乳中。将辣椒碱制备成辣椒碱微乳,溶解度得以提高,解决了其水溶性低的问题,为辣椒碱的开发与应用提供一定的参考。展开更多
A delayed predator-prey Gompertz model is investigated. The stability is analyzed. Anti-control of Hopf bifurcation for the model is presented. Numerical simulations are performed to confirm that the new feedback cont...A delayed predator-prey Gompertz model is investigated. The stability is analyzed. Anti-control of Hopf bifurcation for the model is presented. Numerical simulations are performed to confirm that the new feedback controller using time delay is efficient in creating Hopf bifurcation. Finally, main conclusions are included.展开更多
文摘为了提高辣椒碱溶解度和生物利用度将其制备成微乳,经溶解度实验和伪三元相图确定微乳处方组成和表面活性剂与助表面活性剂的最佳质量比(Km);以粒径和载药量为考察指标,采用星点设计-响应面法优化辣椒碱微乳处方;并对最优处方制备的辣椒碱微乳进行质量评价。辣椒碱微乳最优处方为辣椒碱5.12%,油酸乙酯5.82%,曲拉通X-100和无水乙醇(K_(m)=3∶1)28.54%,加纯化水至5.0 g;制得的微乳为O/W型澄清透明的均一液体,其形态为表面光滑的球形;CAP微乳粒径为16.5±0.17 nm,多分散指数为0.387±0.02,Zeta电位为-12.1±0.12 m V,粘度为33±1.73 m Pa·s;冻融稳定性和离心稳定性良好;红外光谱和差示扫描量热分析表明辣椒碱被包裹在微乳中。将辣椒碱制备成辣椒碱微乳,溶解度得以提高,解决了其水溶性低的问题,为辣椒碱的开发与应用提供一定的参考。
基金Foundation item: Supported by the National Natural Science Foundation of China(l1261010) Supported by the Soft Science and Technology Program of Guizhou Province(2011LKC2030)+3 种基金 Suppored by the Natural Science and Technology Foundation of Guizhou Province(J[2012]2100) Suppored by the Governor Foundation of Guizhou Province([2012]53) Suppored by the Doctoral Foundation of Guizhou University of Finance and Economics(2010) Suppored by the Science and Technology Program of Hunan Province(2010FJ6021)
文摘A delayed predator-prey Gompertz model is investigated. The stability is analyzed. Anti-control of Hopf bifurcation for the model is presented. Numerical simulations are performed to confirm that the new feedback controller using time delay is efficient in creating Hopf bifurcation. Finally, main conclusions are included.