• 主题
高级搜索  >
历史搜索 清空历史
首页> 外文学位 >Effect of production method on characteristics and oxidative stability of microencapsulated fish oil.
【24h】

Effect of production method on characteristics and oxidative stability of microencapsulated fish oil.

机译：生产方法对微胶囊鱼油特性和氧化稳定性的影响。

获取原文
获取原文并翻译 | 示例
页面导航
  • 摘要
  • 著录项
  • 相似文献
  • 相关主题

摘要

Scope and method of study. The main objective of this study is to evaluate the effect of fish oil microencapsulation method on characteristics and oxidative stability. Four methods, freeze drying, spray drying by a 2 fluid pressure nozzle, spray drying by a 3 fluid pressure nozzle, and spray drying by a 2 channel ultrasonic nozzle were used in this research. Surface morphology of the microcapsules where determined by scanning electron microscopy. Total oil of the microcapsules was determined by soxtec and Rose-Gottlieb solvent extraction methods. Solvent extractable surface oil was also determined. Size of the microcapsules was determined by particle size analysis. Moisture content of the microcapsules was determined by Karl Fischer titration. Oxidative stability of the microcapules was determined over a 15 week period in which HS-SPME was used to analyze volatile oxidative compounds by GC-MS.;Findings and conclusions. Comparison of chemical and physical characteristics revealed some differences. With regard to uniformity of size and shape, microcapsules produced by the 2-channel ultrasonic nozzle were observed to be more uniform in size and shape, determined by particle size distribution and SEM image comparisons. Disadvantages were also observed for ultrasonic nozzle microcapsules having lower oil encapsulating efficiency compared to pressure nozzles and freeze dried microcapsules. There was no observed initial advantage to spray methods that did not require the creation of an emulsion for microcapsule production. However, it was observed that microcapsules produced by multi-fluid nozzles propanal levels were lower throughout the course of a 14 week stability test. It should be stated that the 15 week sampling period may not have been long enough to adequately observe the induction of oxidation for all samples stored in the conditions chosen. Sample values fluctuated within a moderate range throughout the entire study. However, by observing propanal levels at the last data point of the stability study some conclusions may be drawn. At the end of the 5°C test PAR levels for fish oil and freeze dried samples were observed to have a significant increase while spray dried samples values remained steady. This may indicate the beginning of oxidation among the fish oil and freeze dried samples while spray dried samples were remaining stable.
机译：研究范围和方法。这项研究的主要目的是评估鱼油微囊化方法对特性和氧化稳定性的影响。本研究采用冷冻干燥，2流体压力喷嘴​​喷雾干燥，3流体压力喷嘴​​喷雾干燥和2通道超声波喷嘴喷雾干燥四种方法。通过扫描电子显微镜确定微胶囊的表面形态。通过soxtec和Rose-Gottlieb溶剂萃取法测定微胶囊的总油。还确定了可溶剂萃取的表面油。通过粒度分析确定微胶囊的大小。通过Karl Fischer滴定法测定微胶囊的水分含量。在15周的时间内确定了微囊的氧化稳定性，其中使用HS-SPME通过GC-MS分析挥发性氧化性化合物。结果与结论。化学和物理特性的比较显示出一些差异。关于尺寸和形状的均匀性，观察到由2通道超声喷嘴产生的微胶囊的尺寸和形状更均匀，这是通过粒度分布和SEM图像比较确定的。还观察到与压力喷嘴和冷冻干燥的微胶囊相比具有较低的油包封效率的超声波喷嘴微胶囊的缺点。没有观察到不需要制备用于微胶囊生产的乳液的喷雾方法的初始优点。但是，观察到在整个14周的稳定性测试过程中，由多流体喷嘴产生的微囊的丙烷水平较低。应该指出的是，15周的采样时间可能不够长，不足以充分观察到在所选条件下存储的所有样品的氧化诱导。在整个研究过程中，样本值在适当范围内波动。但是，通过观察稳定性研究的最后一个数据点的丙烷水平，可以得出一些结论。在5°C测试结束时，观察到鱼油和冷冻干燥样品的PAR水平显着增加，而喷雾干燥样品的值保持稳定。这可能表明鱼油和冷冻干燥的样品开始氧化，而喷雾干燥的样品保持稳定。

著录项

  • 作者

    Legako, Jerrad.;

  • 作者单位

    Oklahoma State University.;

  • 授予单位 Oklahoma State University.;
  • 学科 Agriculture Food Science and Technology.
  • 学位 M.S.
  • 年度 2009
  • 页码 96 p.
  • 总页数 96
  • 原文格式 PDF
  • 正文语种 eng
  • 中图分类 农产品收获、加工及贮藏;
  • 关键词

相似文献

  • 外文文献
  • 中文文献
  • 专利
获取原文

客服邮箱：kefu@zhangqiaokeyan.com

京公网安备：11010802029741号 ICP备案号：京ICP备15016152号-6 六维联合信息科技 (北京) 有限公司©版权所有

  • 客服微信

  • 服务号