期刊文献+

氨苄青霉素钠-乙基纤维素纳米微球的制备与表征 被引量:1

Preparation and Characterization of Ampicillin Loaded Ethylcellulose Nanospheres
下载PDF
导出
摘要 低分子量的乙基纤维素 (EC)包覆氨苄青霉素钠 ,采用纳米沉淀法制备氨苄青霉素钠 -乙基纤维素纳米微球。乙基纤维素 (EC)被 34% (w/ w)硝酸降解可以得到低分子量的乙基纤维素 ;FTIR,1 3C- NMR,元素分析 ,X-射线衍射分析证实在硝酸降解过程中 ,除了聚合度和结晶度降低之外 ,乙基纤维素的基本特性和基本结构没有变化 ;EC分子量的大小影响纳米微球的粒径大小、粒径分布和对药物的包覆效率。体外试验表明 ,氨苄青霉素钠 -乙基纤维素纳米微球对氨苄青霉素钠的缓慢释放为 3~ 10 Ampicillin sodium was embeded in ethylcellulose (EC) nanospheres made of low-molecular-weight EC. Low-molecular-weight EC was attained with ethylcellulose being degraded by 34% (w/w) nitric acid; Fourier transform infrared (FTIR) spectroscopy,^13C-NMR,element analysis confirmed that the basic structure and major properties of low-molecular-weight EC maintained agreement with those of undegraded EC except that the polymerization degree of EC decreased. Wide-angle X-ray diffraction demonstrated that the crystallinlty of degraded EC decreased. Ampicillin sodium loaded EC nanospheres were characterized by transmission electron microscopy, FTIR and in vitro drug release. Molecular weight of EC would affect on the size of nanospheres, distribution and drug encapsulation efficiency. Drug loaded nanospheres resulted in the drug control release in 3- 10 hours.
出处 《生物医学工程学杂志》 EI CAS CSCD 北大核心 2005年第1期60-65,共6页 Journal of Biomedical Engineering
基金 教育部博士点基金资助项目 (2 0 0 0 0 485 15 )
关键词 氨苄青霉素钠 乙基纤维素 纳米微球 制备工艺 纳米药物 Ethylcellulose (EC) Low-molecular-weight EC Nanospheres Control release Ampicillin sodium
  • 相关文献

参考文献15

  • 1Christoph Schmidt, Roland Bodmeier.Incorporation of polymeric nanoparticles into solid dosage forms. Journal of Controlled Release, 1999; 57:115.
  • 2Lin SY, Lin KH,Li MF. Micronized ethylcellulose used for designing a directly compressed time-controlled disintegration tablet. Journal of Controlled Release,2001;70:321.
  • 3Reinberg AE. Concepts in chronopharmacology. Annu Rev Pharmacol Toxicol, 1992; 32:51.
  • 4Lemmer B. The clinic relevance of chronopharmacology in therapeutic. Pharmacol Res,1996; 33:107.
  • 5Smlensky MH, D'alonzo GE. Medical chronobiology:concepts and applications. Am Rev Respir Dis,1993;147:2.
  • 6Cristiano, Richard J. Targeted, non-viral gene delivery for cancer gene therapy. Front Biosci,1998;3:1161.
  • 7Sreenivasa Rao B, Ramana Murthy KV. Studies on rifampicin release from ethylcellulose coated nonpareil beads. Internat-ional Journal of Pharmaceutics, 2002; 231:97.
  • 8Sainji N, Hiroyuki Y, Yoshiyuki H, et al. Porositycontrolled ethylcellulose film coating.1. Formation of porous ethylcellulose film in the casting process and factors affecting film-density. Chem Pharm Bull, 1993; 1(2):329.
  • 9Tang Huaqin, Jiang Weiling, Zhao Guanghua, et al. Research of cephradine-ethylcellulose microcapsules. Chinese J of Pha-rm, 1996; 27(1):13.
  • 10Allemann E, Gurny R, Doelker E. Drug-loaded nanoparticles-preparation methods and drug targeting issues. Eur J Pharm Biopharm,1993;39:173.

同被引文献1

引证文献1

二级引证文献13

相关作者

内容加载中请稍等...

相关机构

内容加载中请稍等...

相关主题

内容加载中请稍等...

浏览历史

内容加载中请稍等...
;
使用帮助 返回顶部