Preparation and Characteristics of Rumen-Bypass Microcapsules for Improvement of Productivity in Ruminants
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- 作者：Tetsuro Yoshimaru ; Masahiko Shibata ; Tetsuo Fukugomori ; and Kiyoshi Matsumoto
- 刊名：Journal of Agricultural and Food Chemistry
- 出版年：1999
- 出版时间：February 1999
- 年：1999
- 卷：47
- 期：2
- 页码：554 - 557
- 全文大小：110K
- 年卷期：v.47,no.2(February 1999)
- ISSN：1520-5118
文摘
Rumen-bypass microcapsules were prepared by a spray-dry method for protection against microbialhydrogenation in the rumen (neutral pH). Porous starch was used as the core material, and themicrocapsules were prepared by a triple coating of Eudragit E100, AS-HF, and shellac. Capsuleswere generated with yield of about 48% and a mean particle diameter of 20-30 
m. Themicrocapsules had high stability in a neutral solution that mimicked a ruminal pH (pH 6.5).Moreover, when microcapsules were incubated in the presence of ruminal microorganisms, about65% of the microcapsules were resistant to digestion in ruminal fluids, and protection of the inclusionsubstance was observed. In addition, the efficiency of release of these microcapsules was about 85%within only 30 min in the abomasal environment (pH 3.0).Keywords: Microcapsule; spray-dry method; rumen-bypass; shellac; resistance to ruminal microorganisms
m. Themicrocapsules had high stability in a neutral solution that mimicked a ruminal pH (pH 6.5).Moreover, when microcapsules were incubated in the presence of ruminal microorganisms, about65% of the microcapsules were resistant to digestion in ruminal fluids, and protection of the inclusionsubstance was observed. In addition, the efficiency of release of these microcapsules was about 85%within only 30 min in the abomasal environment (pH 3.0).Keywords: Microcapsule; spray-dry method; rumen-bypass; shellac; resistance to ruminal microorganisms