Edible biotechnology frontier: water-soluble dietary fiber

Water-soluble dietary fiber is a type of fiber that can be dissolved in water. It is sticky and can absorb a lot of water in the intestinal tract, keeping the stool soft. Water-soluble fiber can effectively activate the beneficial bacteria in the intestinal tract, promote the proliferation of beneficial bacteria, and create a healthy ecology of the intestinal tract. Soluble dietary fiber can bring a longer-lasting feeling of fullness, reduce the intake of heat energy, and reduce the digestion and absorption of nutrients in the intestinal tract, which will eventually consume body fat and play a role in weight loss.

Coca-Cola's concept products such as "Sprite+" and "Cola Zero+", which add water-soluble dietary fiber, have been loved by consumers in 2019 and achieved double-digit market growth. At present, the common water-soluble dietary fibers in the market mainly include fructooligosaccharides, isomalt oligosaccharides, lacto-oligosaccharides, xylo-oligosaccharides, soy oligosaccharides, agar powder and carboxymethyl cellulose, etc., developed to find a healthier, tasteful More comfortable soluble dietary fiber is a hot research field in the market.

BioEnergy Research magazine reported on September 3 that scientists from Campinas University obtained a new soluble dietary fiber resource-arabinoxylan (XOS) from sugar cane straw and coffee husk. This research opens up a new perspective from the enzymatic hydrolysis of lignocellulosic biomass to the production of functional food ingredients (such as prebiotic xylo-oligosaccharides). This research aims to improve the extraction process of arabinoxylan from sugarcane straw and coffee husk to use an ideal enzyme mixture formula to produce short-chain arabinoxylans through enzymatic hydrolysis.

The highest extraction rate of the arabinoxylan extraction process is about 40.35%, the extraction efficiency of arabinoxylan is about 82.32%, and the lignin content value is very small. The researchers tested three commercial enzymes (endoxylanase (GH11), α-L-arabinofuranosidase (GH51) and ferulic acid esterase (CE1)) for the production of sugarcane straw using the central combination experiment design. Arabinoxylan and coffee husk arabinoxylan. The developed high-efficiency composite enzyme preparation can obtain up to 10.23g/L sugarcane straw arabinoxylan and 8.45 g L-1 coffee husk arabinoxylan from sugarcane straw and coffee husk, respectively.