Mineral components and anti-oxidant activities of tropical seaweeds View Full Text


Ontology type: schema:ScholarlyArticle     


Article Info

DATE

2005-07

AUTHORS

Suzuki Takeshi, Yoshie-Stark Yumiko, Santoso Joko

ABSTRACT

Seaweeds are known to hold substances of high nutritional value; they are the richest resources of minerals important to the biochemical reactions in the human body. Seaweeds also hold non-nutrient compounds like dietary fiber and polyphenols. However, there is not enough information on the mineral compounds of tropical seaweeds. Also we are interested in the antioxidant activities of seaweeds, especially those in the tropical area. In this study, Indonesian green, brown and red algae were used as experimental materials with their mineral components analyzed by using an atomic absorption spectrophotometer. The catechins and flavonoids of these seaweeds were extracted with methanol and analyzed by high performance liquid chromatography (HPLC); the antioxidant activities of these seaweeds were evaluated in a fish oil emulsion system. The mineral components of tropical seaweeds are dominated by calcium, potassium and sodium, as well as small amounts of copper, iron and zinc. A green alga usually contains epigallocatechin, gallocatechin, epigallocatechin gallate and catechin. However, catechin and its isomers are not found in some green and red algae. In the presence of a ferrous ion catalyst, all the methanol extracts from the seaweeds show significantly lower peroxide values of the emulsion than the control, and that of a green alga shows the strongest antioxidant activity. The highest chelation on ferrous ions is also found in the extract of this alga, which is significantly different from the other methanol extracts in both 3 and 24 h incubations. More... »

PAGES

205-208

Identifiers

URI

http://scigraph.springernature.com/pub.10.1007/s11802-005-0033-3

DOI

http://dx.doi.org/10.1007/s11802-005-0033-3

DIMENSIONS

https://app.dimensions.ai/details/publication/pub.1020996458


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