| Summary: | 碩士 === 國立中興大學 === 食品暨應用生物科技學系所 === 101 === Rice barn is one of the by-products to get from during rice milling. It is abundantly rich in nutrients, functional compounds, lipase and peroxides, The milled rice is inducing oxidation and quality decrease. In recent years, research to stabilization on rice bran has become more popular in improving functional compounds contain and physiological activity.
The aim of this study was to use rice bran as material to stabilize rice bran effect by heat treatment and fluidized bed agglomeration technology to improve functions and anti-hygroscopicity.
Fluidized bed agglomeration is kind of wet granulation, used for processing of chinese herbal medicine and functional food products in domestic and international. The fluidized bed agglomeration has an advantage on high efficiency. In low labor cost and coating functional compounds to release in gastrointestinal tract.
This research results showed that rice bran during heat treatment, baking 180℃ 30 min has efficiency to inhibit peroxidase activity to 0 %, and decrease lipase activity to 54.22 %, DPPH scavenging effects arise from fresh rice bran 64.89 % to 69.61 %, as the optimal heating condition, after storage 28 days the content of free fatty acid, acid value and pH value had no significant increased. When adding maltdextrin, different binder became reduced enthalpy of drying, increased binder hardness and stickiness and enhance film glass transition temperature to 94- 108℃, has predicted to speed up dry rate and anti-caking in fluidized bed agglomeration technology.
When maltodextrin used in fluidized bed agglomeration technology, enhance particle size growth rate, good for Carr’s index, decrease angle of repose, on the other hand, take γ-oryzanol as gastrointestinal tract release target, the result showed that rice bran functional particle did not released in simulated gastric fluids, and had high released rate 92- 95 % in simulated intestinal fluids beside corn starch paste granulation powder, and fit zero-order kinetics model, after evaluate release index 0.181- 0.299 of Korameyer- Peppas release kinetics model, release model belong tofickian diffusion model.
|
|---|
