Soluble Alginate Research Articles

かっそう中の硫酸多糖に関する研究 ＩＩＩ カゴメコンブからの精製フコース含有多糖の分別

According to the method as reported previously, a crude fucose-containing polysacchaide was extracted from the brown algae Kjellmaniella crassifolia and the extract was purified by precipitation with 20% (v/v) ethanol in the presence of 0.05M Mgcl2 to remove contaminated soluble alginate. Then, 1% solution of this purified polysaccharide heated at pH2 at 80°C for 1h and dissolved in 0.05M Mgcl2 was fractionated by the addition of ethanol to 50% (v/v) into soluble (B) and insoluble (A) fractions. Both A and B migrated as a single band on cellulose acetae film electrophoresis. They contained fucose, uronic acid (as glucuronic acid) and ester sulfate in the molor ratios of 1:4:2.3 (A), and 1:0.1:1.1 (B) respectively.

Virus Sampling in Wastewater - Field Experiences

Membrane adsorption, chemical precipitation, and soluble alginate filtration methodologies have been combined in the development of a relatively simple yet sensitive procedure for detecting low concentrations of virus in wastewater. Techniques originally developed for sampling clean water were modified after initial attempts at wastewater sampling were unsuccessful. Each segment of the modified procedure has been repetitively tested in sampling various wastewater effluents seeded with Poliovirus 1. Virus recovery efficiency in each segment of the procedure is reported. Detection limits at each stage of sample processing are delineated. The procedure is being utilized in comparison of virus removal by various wastewater treatment systems. A major prerequisite of this study was the ability to detect low concentrations of both seeded and naturally occurring viruses in large volumes (20 gal to 100 gal) of treated wastewater.

Physical properties of "Narutowakame" and ITS alginate and metal contents.

To elucidate the significance of ash-treatment in the processing of “Narutowakame”, a dried product of brown sea-weed Undaria pinnatifida, the alginate and metal contents together with some physical properties of specimens treated with wood-ash were compared with those of untreated specimens. The hardness and tensile strength of the ash-treated specimens were remarkably higher than those of the untreated ones. The water alginates were also richer in the treated specimens. As a result of the ash-treatment, Ca in the residue increased remarkably while Na, K, and Mg in the water soluble alginate fraction decreased. From these results, it was assumed that the hardness of “Narutowakame” is, for the most part, due to the formation of water insoluble Ca alginates during the ash-treatment.