碩士 / 明志科技大學 / 生化工程研究所 / 100 / Phycobiliproteins, brilliantly colored pigments, function as a receiver of light for driving photosynthesis in the microalga Spirulina. The predominant pigment in the phycobiliprotein family is phycocyanin. Phycocyanin is commonly used as a natural colorant for food and cosmetic industries because of its inherently blue color. Therefore, color is an important attribute related to the quality of commercial products. Due to the possible denaturation of the protein fraction of the phycocyanin during thermal processing and consequent loss of color, it is of interest to use stabilizing agents, such as polyols, to extend the shelf life of products. In this study, thermal degradation kinetics of the phycocyanin with addition of several stabilizing agents was investigated. Sorbitol exhibited higher stable capability as compared to other stabilizing agents. At the end of 6 h of heat treatment, the phycocyanin at pH 7 maintained about 80% of its original activity with the addition of 3M sorbitol. The kinetic model was assumed and validated as being of the elementary reaction.It wsa used to predict degradation rate constant (k) and residue activity of phycocyanin. The results showed that phycocyanin degradation rate significantly were decreased by the addition of sorbitol.
| Identifer | oai:union.ndltd.org:TW/100MIT00723009 |
| Date | January 2012 |
| Creators | Liu,Chang Sung, 劉長宋 |
| Contributors | Su,Chia Hung, 蘇家弘 |
| Source Sets | National Digital Library of Theses and Dissertations in Taiwan |
| Language | zh-TW |
| Detected Language | English |
| Type | 學位論文 ; thesis |
| Format | 70 |
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