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The defense date of the thesis is 2012-07-10
The current date is 2019-02-24
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URN etd-0705112-115721 Statistics This thesis had been viewed 1482 times. Download 3 times. Author Yun Chen Author's Email Address No Public. Department Bioengineering Year 2011 Semester 2 Degree Master Type of Document Master's Thesis Language zh-TW.Big5 Chinese Page Count 60 Title Application and prospect of xylooligosaccharides Keyword Prebiotics Xylooligosaccharides Bifidobacteria Bifidobacteria Xylooligosaccharides Prebiotics Abstract Xylooligosaccharides(XOS) are chains of xylose molecules linked via β 1-4 bonds with degree of polymerization ranging from 2 to 10. The currently available xylooligosaccharides, resulted from hydrolysis of xylan, is a functional oligosaccharide. Like ordinary sugar it can serve as a sweetener. XOS also has good resistance to heat and acid. In addition, it has found that xylooligosaccharides can stimulate the proliferation of intestinal bacteria and improve bowel function, and to maintain soft feces. The study shows that XOS can reduce blood cholesterol and increase the absorption of minerals, and can be as beneficial biomass to promote intestinal probiotics such as bifidobacteria and lactobacilli by increasing viable counts or energy, and thus enhance human health.
Xylan can be hydrolyzed either by enzymatic or by chemical methods (hydrothermal treatments) and, furthermore, a combination of both. The resulting crude XOS solutions require a sequence of purification steps to yield high purity XOS containing at least 70-90% XOS. XOS has become a new functional food additive in the early 1990s.
XOS is very unique, because of its structural characteristics, being resistant to heat and acid. Its biomass characteristics are to stimulate the growth of probiotics and strong affect the intestinal bacteria ecology. The XOS is difficult to be consumed by harmful bacteria and to be subjected gastric acid decomposition. XOS can effectively reach the large intestine, helping to maintain and enhance intestinal nutrients absorption. The 70% of immune cells from the human body are from the intestinal tract. If microbial proliferation in the intestine can be readily ruled by XOS ingestion, leading to suppression of bad bacteria, to enhance intestinal nutrient absorption and to promote the intestinal peristalsis to defecation.
Advisor Committee Dey-Chyi Sheu - advisor
Files Date of Defense 2012-07-04 Date of Submission 2012-07-10