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...
متن کاملThermal behavior of alginic acid and its sodium salt
___________________________________________________________________________________________________________________________________________________________________________________________________________________________________________ Abstract: An evaluation of hydration and thermal decomposition of HAlg and its sodium salt is described using thermogravimetry (TG) and differential scanning cal...
متن کاملAlginic 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...
متن کاملAntibacterial Performance of Alginic Acid Coating on Polyethylene Film
Alginic acid coated polyethylene films were examined in terms of surface properties and bacteriostatic performance against two most representative bacterial strains, that is, Escherichia coli and Staphylococcus aureus. Microwave plasma treatment followed by brush formation in vapor state from three distinguished precursors (allylalcohol, allylamine, hydroxyethyl methacrylate) was carried out to...
متن کاملReduction 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)→...
متن کاملذخیره در منابع من
با ذخیره ی این منبع در منابع من، دسترسی به آن را برای استفاده های بعدی آسان تر کنید
ژورنال
عنوان ژورنال: Nature
سال: 1946
ISSN: 0028-0836,1476-4687
DOI: 10.1038/158271a0