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Seaweed has been used extensively
as food around the world. For example nori, dulse, wakame and more.

a.     Nori

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Nori
is made of Porphyra sp. which is belongs to red algae phylum of laver species.
Porphyra sp is mostly used for food in Japan and China as the basis of the
large nori industry. (Bocanegra et al. 2009). Porphyra sp. is purplish-black
seaweed as shown in Figure 1, which can be found in intertidal zones (DJ
Mchugh,2003), usually between upper intertidal zones and spark zones in simple
oceanic cold waters.

Porphyra
sp. is one of the most commercially available marine crop and well known as sea
vegetables. It is mainly farmed in Japan, Korea and China meanwhile wild
Porphyra sp was harvested in countries with coastlines along the North
Atlantic, such as the United Kingdom, Ireland, Canada and the United State. (Bito
et al, 2017). 

Seaweeds
are rich in polysaccharides, vitamins and minerals, low in fat and have high
protein contents in general. (Taboada et al, 2013). But, in dried Porphyra sp
which known as nori consists numerous nutrients such as proteins, dietary
fibers, polyunsaturated fatty acids, minerals, and vitamins such as K and
vitamin C and a large amount of proteins which is higher than soybeans. (Bito
et al, 2017). Besides, dried nori also contain large amount of carbohydrates,
small amount of lipids, large amount of potassium for example potassium and
large amount of iron compared with other plant-derived foods. (Bito et al, 2017).

In
addition, Porpyhra sp. has various biologically active compounds such as
peptides, mycosporine-like amino acids, phenolic compounds, phycobiliproteins
and polysaccharides which is exhibit various pharmacological activities such as
immunomodulation, anticancer, antihyperlipidemic and antioxidative activities .(Bito
et al, 2017)  In conclusion, the
consumption of nori or Porpyhra sp has a beneficial effect on human health.(Bito
et al, 2017)

 

b.     Dulse 

There
are another red algae which largely being used as seaweed. In the Western
world, this red algae has been popular as one of the more seaweed for human
consumption which known as dulse.( Mouritsen et al, 2013)
Palmaria palmata which is known as dulse is a red algae with leathery fronds as
shown in figure 2 and it can be found in the eulittoral zone and sometimes the
upper sublittoral.( DJ Mchugh,2003).

Palmaria
Palmata was considered as one of the more delectable for human comsumption with
a large and fairly unexplored potential for use in the cuisine (Mouritsen,
2012a; Mouritsen, 2013) and in the home kitchen ( Rhatigan, 2009; Mouritsen et
al, 2013). Dulse is a common seaweed in the cold Atlantic waters and holds a
fine potential for commercialization both as whole food as well as ingredient.(Mouritsen,
2013). Palmaria palmata was harvested mainly in Ireland and the shores of the Bay
of Fundy in eastern Canada and more. (DJ Mchugh, 2003). Some of this red algae
were harvested in the wild in Iceland and Maine at low tide. (Mouritsen, 2013).
This red algae has been collected by hand of the harvesters who plucking it
from the rocks at low tide.

Similar
to nori, dulse also has their own benefit. Dulse consists a relatively high
protein content which is greater than other food such as chickens or almonds
but its much less than nori. (Holdt and Kraan,2011; Mouritsen, 2013). Dulse also
extremely rich in iodine, phosphorus, calcium and consists more potassium than
any other food. (Pereira, L.,2011 ). In addition, Palmaria palmata has relatively
high amount Vitamin C which activates the intestinal absorption of iron and
strengthens the immune defense system. (Pereira, L.,2011). In conclusion, dulse
also has their own benefit but it is not been introduced in studies.

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