Decomposition of Alginic Acid by Microorganisms

Ionomeric Films of Alginic Acid

Transparent, flexible films could be made by casting aqueous solutions of alginic acid, but they dissolved in water. When films were made from a solution of alginic acid and multivalent ions, they were still water soluble. However, when alginic acid films were immersed in a solution of salts with multivalent ions, they dissolved in water much more slowly, if at all. Treatment with calcium and z...

Reduction of hypervalent chromium in acidic media by alginic acid.

Selective oxidation of carboxylate groups present in alginic acid by Cr(VI) affords CO2, oxidized alginic acid, and Cr(III) as final products. The redox reaction afforded first-order kinetics in [alginic acid], [Cr(VI)], and [H(+)], at fixed ionic strength and temperature. Kinetic studies showed that the redox reaction proceeds through a mechanism which combines Cr(VI)→Cr(IV)→Cr(II) and Cr(VI)→...

Decomposition of Guayule Resins by Microorganisms.

Alginic acid degradation by eliminases from abalone hepatopancreas.

Two separate alginic acid eliminases have been purified from abalone hepatopancreas. Alginase I appeared to be specific for p-1,4 bonds involving o-mannuronic acid units and apparently acts at random on internal bonds. Alginase II appeared to cleave 1,4 bonds involving L-guluronic acid and to work at or near chain ends. A combination of both enzymes could not degrade alginic acid completely, in...

Proximate analysis of different groups of irradiated alginic acid

Background: Seaweeds contain significant quantities of lipids, protein, vitamins and minerals. Aquavac Ergosan contains 1% alginic acid extracted from two brown seaweeds, Laminaria digitata and Ascophyllum nodosum. Both in vivo and in-vitro researches have mainly been focused on the effect of Ergosan on fish growth, survival rate, reproductive performance and innate immunity in blood and epider...