Search for health functional ingredients in red algae, a low-use resource; a method for preparing new oligosaccharides × SDGs
We found that the low-use red alga Dulse from Hokkaido, Japan is rich in a polysaccharide called xylan, which has a different structure from that of xylan from land plants. In addition, we found that xylooligosaccharides specific to Dulse, prepared by enzymatic degradation of Dulse xylan, showed selective growth-promoting effects on bifidobacteria. Through these studies, we would like to contribute to the development of functional food ingredients that improve people's health.
Dulse is a red algae that grows on the
kombu culture rope, a special product of Hakodate City, and many are discarded.
On the other hand, it is known to have a polysaccharide with an unusual
structure. Here, an oligosaccharide having an unusual structure was prepared
from a polysaccharide of Dulse and the structure was determined.
In the future, we will look for its health functionality.
Characteristics of Red Alga "Dulse"
Dulse is a red algae that grows in cold
can be eaten
overseas, but most of it was unused
in Japan. In particular, it was
difficult to dispose of a large
amount of dulse
because it grew on
the culture rope for kelp, a
special product of Hakodate.
Dulse, like other red algae such as
laver (“Nori” in Japanese), contains a lot of protein and the amount is
comparable to soybean. On the other hand, it contains a lot of
carbohydrates, especially dietary fiber.
Dulse’s cell walls contain polysaccharides
classified as dietary fibers called xylan.
This xylan has an unusual structure that is
different from that of land plants.