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首页> 外文期刊>Journal of Microencapsulation: Microcapsules Liposomes Nanoparticles Microcells Microspheres >Stabilizing effects of calcium alginate microspheres on mycobacterium bovis BCG intended for oral vaccination
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Stabilizing effects of calcium alginate microspheres on mycobacterium bovis BCG intended for oral vaccination

机译:海藻酸钙微球对牛分枝杆菌卡介苗口服疫苗的稳定作用

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摘要

In this study,alginate microspheres containing BCG were prepared at a diameter of approx 10mu m by emulsification-internal gelation of an alginate-BCG solution dispersed in olive oil using a high rate speed stirrer.The stability of BCG was assayed at 4°C showing that the encapsulated BCG was more stable than free BCG at least for 5 weeks;however,BCG in sodium alginate solution was not stable at all.On the other hand,the studies using media with different pH (1.2,4.4,6.2,6.8 and 7.5) have demonstrated that the alginate microspheres are stable in acidic medium for upto 1.5 h without any sign of disintegration.Moreover,BCG incorporated in alginate microspheres demonstrated an almost 9-fold increase in viable bacilli in simulated gastric fluid (SGF) after 1.5 h in comparison with free BCG.
机译:在这项研究中,通过使用高速搅拌器将分散在橄榄油中的藻酸盐-BCG溶液乳化-内部凝胶化,制备了直径约为10μm的含BCG藻酸盐微球。在4°C下测定了BCG的稳定性,显示认为包封的BCG至少要比游离BCG稳定5周;但是,藻酸钠溶液中的BCG却根本不稳定。另一方面,使用不同pH(1.2、4.4、6.2、6.8和7.5)已证明藻酸盐微球在酸性介质中稳定达1.5 h没有任何崩解迹象。此外,掺入藻酸盐微球的BCG证明1.5 h后模拟胃液(SGF)中的活菌增加了近9倍与免费的BCG相比。

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