Chemical modification of alginic acid by ultrasonic irradiation
نویسندگان
چکیده
منابع مشابه
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...
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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)→...
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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...
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ژورنال
عنوان ژورنال: Acta Scientifica Naturalis
سال: 2016
ISSN: 2367-5144
DOI: 10.1515/asn-2016-0002