Dried seaweed is seaweed.
Porphyry, also known as seaweed, is a plant of the genus Porphyra in the family Rhodophyceae.
Although Porphyra species are distributed in cold zones, temperate zones, subtropical and tropical seas, the species diversity in subtropical to temperate seas is rich. The geographical distribution of seaweed in my country also follows this pattern. It is mainly distributed in the intertidal zone from the Yellow Sea and the Bohai Sea to the southeastern coast. In addition, there are also a few seaweed species distributed along the coast of Hainan Island, and their distribution has regional characteristics. The Porphyra species naturally distributed in the Yellow and Bohai Seas are mainly Porphyra zebra, Porphyra sweetensis and Porphyra half-leaf. On the southeast coast, the main species are Porphyra striata, Porphyra rugosa and Porphyra longifolia. In addition, Porphyra rotunda is widely distributed along the coast of my country and grows from south to north. It is a wide-temperature species. Based on natural taxa and habitat environment, two major cultivation areas of Porphyra striata in the north of the Yangtze River and Porphyra striata south of the Yangtze River have been formed in my country. ?
Porphyry alba is a unique warm temperate seaweed cultivar in my country. Its output accounts for about 75% of the total production of laver in the country. The cultivation areas are mainly distributed along the coasts of Fujian, Zhejiang and Guangdong. In recent years, with the increase of Porphyra alba, With the rising price of seaweed and the improvement of breeding technology, the breeding scope has gradually moved northward to Nantong and Lianyungang, Jiangsu Province. Poriculture is mainly concentrated in Jiangsu and Shandong, and its output and export volume account for more than 95% of the national Porphyra industry.
Laver is rich in protein, carbohydrates, unsaturated fatty acids, vitamins and minerals, and has high nutritional value.
Protein and Amino Acids
Porphyry is one of the seaweeds richest in protein. The protein content in seaweed varies with the type of algae, growth time, location, etc. Generally, the protein mass fraction accounts for 25% to 50% of the dry weight of seaweed.
Algae are rich in dietary fiber. They constitute a large category of dietary fiber, in which the proportion of soluble dietary fiber is high. Many obvious physiological functions of dietary fiber are related to its physical and chemical properties. Among them, its ability to form viscous solutions is the most important factor. Viscous polysaccharides can interfere with the absorption of nutrients, thus affecting the metabolism of sugars and lipids.
The mass fraction of seaweed fat is 1% to 3% of the dry mass of the algae. Seaweed has a higher proportion of unsaturated fatty acids.
Seaweed is rich in vitamins. The content of vitamin C in seaweed is higher than that in oranges. The content of carotene, vitamins B1, B2 and vitamin E are higher than that in eggs, beef and vegetables. The content of niacin, choline and inositol in seaweed is also high. However, the numerical differences between different seaweeds are quite large, which is related to the type of seaweed on the one hand, and the growth period and processing method of the seaweed on the other hand. ?
Porphyry is an ideal source of natural vitamin B12. Dried seaweed is rich in biologically active vitamin B12. Seaweed contains 5 biologically active vitamin B12 compounds.
The measurement results of ash content in seaweed samples from different sources show that the mass fraction of ash in seaweed is 7% to 26%, which is higher than that of terrestrial plants and animal products. The ash content of most land plants is 5% to 10%. This indicates that seaweed is an important source of minerals, while trace elements are lacking or present in smaller amounts in land vegetables. The contents of Ca, Na, K, Mg and P in seaweed are very high.