The potential of selected marine seaweeds as prebiotic

Chwee, Yvonne Li Van (2012) The potential of selected marine seaweeds as prebiotic. Universiti Malaysia Sabah. (Unpublished)


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The study was aimed to evaluate the prebiotic potential of acid-hydrolyzed watersoluble polysaccharides derived from brown, red and green seaweeds (Sargassum polycystum, Kappaphycus alverazii and Caulerpa lentt1lifera). The polysaccharides were extracted and hydrolyzed using acetic acid and sulphuric acid with three different hydrolysis times. Acid hydrolyzed substrates were evaluated for prebiotic activity based on the growth of Lactobacillus acidophilus within 24h. Growth pattern of L. acidophiluswas determined from the acid hydrolyzed substrates every 4h interval. Prolonged fermentation at 37°C and cold storage (4°C) was performed to evaluate the effect of seaweeds substrates on the survivability of L. acidophllus. K. alverazii has the highest extraction yield (59.4% dry weight), followed by C. lentillifera (3.8%) and s. polycystum (2.55%). Most of the seaweed substrates were found to be able to positively stimulate the growth of L. acidophilus. The results indicated that all three species of seaweed polysaccharides hydrolyzed by using 1.38M sulphuric acid could give pronounced effect on the growth of L. acidophilus, both in the growth rate and the total count, even higher than the commercial prebiotic inulin. Prolonged fermentation showed that acetic acid hydrolyzed polysaccharides would give more protective effect on probiotic compared to sulphuric acid hydrolyzed polysaccharides while all seaweeds samples managed to enhance survivability of probiotic during refrigerated storage. Overall, the current results show that acid-hydrolyzed polysaccharides from seaweeds have prebiotic potential and different degree of hydrolysis for different polysaccharides gave different effect on prebiotic activity. Further studies should be done to evaluate the prebiotic potential by inoculating with faecal/intestinal material, which could assess the seaweed polysaccharides effect in modulation of gut microbiota.

Item Type: Academic Exercise
Uncontrolled Keywords: prebiotic, polysaccharide, hydrolysis time, acid-hydrolyzed water soluble, Lactobacillus acidophilus, fermentation, gut microbiota
Subjects: T Technology > TX Home economics > Nutrition. Foods and food supply
Divisions: SCHOOL > School of Food Science and Nutrition
Date Deposited: 19 Dec 2013 01:23
Last Modified: 10 Oct 2017 06:45

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