Structural Studies of the Extracellular Polysaccharide Produced by the Diatom Chaetoceros curvisetus Cleve.

THE COMPLEX POLYSACCHARIDES OF THE RAPHID DIATOM PINNULARIA VIRIDIS (BACILLARIOPHYCEAE)1

“…The 6‐deoxysugars, Rha and/or Fuc, were major constituents (20–60% w/w) of polysaccharides recovered from the culture media of numerous pennate and centric diatoms, including Thalassiosira pseudonana (Hustedt) Hasle et Heimdal (as Cyclotella nana Hustedt), Navicula incerta Grunow, Asterionella socialis Lewin et Norris, Coscinodiscus wailesii Gran et Angst (as C. nobilis Grunow), and four Chaetoceros species (Allan et al 1972, Smestad et al 1974, 1975, Haug and Myklestad 1976, Percival et al 1980). Galactose and/or Xyl were also recovered in significant amounts from the culture media of several diatoms (Smestad et al 1974, 1975, Staats et al 1999, de Brouwer and Stal 2002). Xylose was the major sugar (46.1 mol%) of the polysaccharides solubilized in the culture medium of the pennate diatom, Cylindrotheca closterium (Ehrenberg) Reimann et Lewin (Staats et al 1999).…”

Antiviral Sulfated Polysaccharide from Navicula directa, a Diatom Collected from Deep-Sea Water in Toyama Bay

“…For example, an extracellular polysaccharide produced by Chaetoceros curvisetus was reported to be partially sulfated and composed of galactose, rhamnose and fucose. 10) In the report on the sugar composition of polysaccharide fractions from a marine diatom, Achnanthes longipes, cetylpyridinium chloride-insoluble fraction was found to contain an anionic polysaccharide consisted of fucose, galactose, xylose, glucuronic acid, glucose, mannose and rhamnose. 11) Fucoglucuronogalactans isolated from A. longipes consisted of highly (ca.…”

Isolation and partial characterization of biologically active polysaccharides from Plantago major L.

“…Polysaccharide samples (3 mg) were hydrolysed in 0.005 M H,SO, (3 mL) at 100 "C for 3 h (Smestad et al, 1975). After neutralization with NaHCO,, dialysis (cut-off lo00 Da) and freeze drying, the monosaccharide composition was determined by methanolysis as described above.…”