Vietnamese brown seaweeds

On the basis of chemical and spectral analyses, the fucoidan fractions obtained were found to be the sulfated fucogalactans containing sulfate ester groups and uronic acid, and composed essentially of fucose and galactose, as well as a minor amount of other sugars. The polysaccharide fractions were tested for anticancer activity. The primarily obtained results showed that all fucoidan fractions isolated from S. swartzii demonstrate bioactivity effects against cancer cells, while fraction F5 with a highest sulfate content exhibits the strongest antiinvasion activity.

10p 12120609 01-06-2020 11 1   Download

The research goals of the dissertation: The research separates, identifies structural characteristics and tests biological activity of fucoidan from several brown algae growing up in Vietnamese Seas to serve for investigating Vietnamese natural sea compound resources and making clear the chemical nature of research objects.

26p xacxuoc4321 09-07-2019 28 6   Download

Brown seaweeds, particularly Sargassum genus, contain large amount of polysaccharides, such as alginate and fucoidan, which are widely applied to related health care approaches. Obviously, this genus is a potential alternative resource for cosmetic industry with its extract gained a great deal of biochemical composition and bioactivity.

7p shiwo_ding7 05-06-2019 23 0   Download

Cấu trúc hóa học của sodium alginate đã được xác định bằng phổ hồng ngoại (FTIR) và phổ cộng hưởng từ hạt nhân (1H- và 13C-NMR). Độ bền nhiệt của sodium alginate được khảo sát bằng phương pháp phân tích nhiệt trọng lượng (TGA). Kết quả cho thấy sự phân hủy của sodium alginate xảy ra trong khoảng nhiệt độ từ 200-550 ºC. Mời các bạn cùng tham khảo.

8p bautroibinhyen16 09-02-2017 228 15   Download

The comparative study of the content and structure characteristics of fucoidans from five Sargassum brown seaweed species in the south provinces of Vietnam was conducted. The yield of fucoidans was ca. 4% (w/w) based on dry seaweed. The percentage of sulfate and uronic acid content was determined by Scott method. Fucoidans were hydrolyzed with trifluoroacetic acid, acetylated and their L-fucose, D-xylose, D-rhamnose, D-mannose, D-glucose, and D-galactose contents were identified by gas chromatography. All polysaccharides isolated from Sargassum polycystum C. Agardh, S. mcclurei Setchell, S.

4p uocvong04 24-09-2015 76 8   Download