| Author | Pacharawan Moolsadang |
| Call Number | AIT Thesis no.FB-09-17 |
| Subject(s) | Vitamin E--Drying
|
| Note | A thesis submitted in partial fulfillment of the requirements for the degree of Master of Science in Food Engineering and Bioprocess Technology, School of Environment, Resources and Development |
| Publisher | Asian Institute of Technology |
| Series Statement | Thesis ; no. no. FB-09-17 |
| Abstract | Three different techniques namely freeze drying method, microwave vacuum drying method, and spray drying method were applied for the DL-alpha tocopheryl acetate encapsulation. The results showed that all of three methods were the effective methods for the encapsulation of DL-alpha tocopheryl acetate and the spray drying method was denoted as the highest performance for encapsulation process. The spray dried encapsulated powders had the lowest surface core material (10.27 %), the high total core material (98.10 %) and the highest encapsulation efficiency (87.83%). In the study on the properties of spray dried encapsulated powders, the increasing of the proportion of acacia gum in the coating material mixture and the reducing percentage of DL-alpha tocopheryl acetate provided the decreasing of surface core material, the increasing of total core material and encapsulation efficiency. The cold water solubility was reduced with the greater proportion of acacia gum in the coating material mixture and the raising of percentage of DL-alpha tocopheryl acetate. In addition, the grater wettability was achieved from the higher ratio of acacia gum in the coating material mixture and the less percentage of DL-alpha tocopheryl acetate. For studying on the effect of inlet air temperature, the lowest surface core material, the highest total core material and the highest encapsulation efficiency were offered by the 2000C of inlet air temperature. The 230°C of inlet air temperature created the broken encapsulated particles was too high temperature for the encapsulation. The response surface methodology and Box-Behnken experimental design was implemented for modeling of the encapsulation competency. The optimum conditions for the encapsulation of DL-alpha tocopheryl acetate were offered at a ratio of acacia gum to maltodextrin of 70:30, a percentage of DL-alpha-tocopheryl acetate of 5%, and an inlet air temperature of 200°C. The rice starch was investigated to be the coating material for entrapping DL-alpha tocopheryl acetate. The acid OSA modified starch had the highest performance of encapsulation. It offered the lowest surface core material (15.95%), the highest total core material (98.15%) and the highest encapsulaion efficiency (82.20%). The DL-alpha tocopheryl acetate entrapped in the acid OSA modified starch had high cold water solubility (89.53%) and a white color. |
| Year | 2009 |
| Corresponding Series Added Entry | Asian Institute of Technology. Thesis ; no. no. FB-09-17 |
| Type | Thesis |
| School | School of Environment, Resources, and Development (SERD) |
| Department | Department of Food, Agriculture and Natural Resources (Former title: Department of Food Agriculture, and BioResources (DFAB)) |
| Academic Program/FoS | Food Engineering and Bioprocess Technology (FB) |
| Chairperson(s) | Athapol Noomhorm; |
| Examination Committee(s) | Rakshit, Sudip Kumar;Ranamukhaarachchi, S. L.; |
| Scholarship Donor(s) | ITEX Foods International limited Thailand;RTG Fellowship; |
| Degree | Thesis (M. Sc.) - Asian Institute of Technology, 2009 |