A novel pH-responsive superabsorbent hydrogel based on gelatin was prepared through crosslinking copolymerization of poly (acrylic acid) and poly (itaconic acid). The copolymerization conditions including monomers, initiator, gelatin and crosslinker concentration, reaction temperature, and neutralization percent were systematically optimized to achieve a hydrogel with swelling capacity as high ...

in this study, variations of the pasting properties, swelling power and solubility of two rice starches, low amylose (8.7%) and high amylose (26%) at two citric acid concentrations (0 and 0.01 m) was investigated. the results showed that the peak viscosity and breakdown viscosity of rice starch decreased significantly (p 0.05).the swelling power and solubility of both starch pastes with and wit...

Lehninger and Schneider (1) studied the swelling of isolat,ed liver mitochondria induced by reduced glutathione (GSH). One outstanding difference from thyroxine-induced swelling was that GSH-induced swelling was not reversible. These studies have been extended by Lehninger and Gotterer (2, 3) with the discovery that GSH-induced swelling is reversed by adenosine triphosphate + Mg ++ + bovine ser...

Lehninger and Schneider (1) studied the swelling of isolat,ed liver mitochondria induced by reduced glutathione (GSH). One outstanding difference from thyroxine-induced swelling was that GSH-induced swelling was not reversible. These studies have been extended by Lehninger and Gotterer (2, 3) with the discovery that GSH-induced swelling is reversed by adenosine triphosphate + Mg ++ + bovine ser...

Hydrogels of 2-hydroxyethyl methacrylate (HEMA) cross-linked with N,N′-cystaminebis(acrylamide) (CBA) were prepared inside microchannels using an in situ photopolymerization for the study of chemical-responsive microgels. By chemically reducing disulfide bonds with dithiothreitol (DTT), the cross-link density of the hydrogel network decreased, leading to an observable swelling of the hydrogel. ...

Purpose: The aim of this work was to synthesize superporous hydrogels of rosiglitazone using chitosan and to study its swelling behaviour for application as a gastroretentive drug delivery system. Methods: Chitosan superporous hydrogels were synthesized using glyoxal as a crosslinking agent by gas blowing method. The effect of pH and ionic strength on the swelling ratio was determined. Swelling...

Assays of mitochondrial phospholipase A activity and mitochondrial swelling demonstrated that the phospholipase A activity is related to the swelling under the experimental conditions used. Both were stimulated by added free fatty acid and CaCl(2), not affected greatly by the addition of monoacyl phosphoglycerides, and inhibited by EDTA. The amount of fatty acid hydrolyzed from endogenous phosp...

An experimental technique to characterize irradiation-induced swelling, or isotropic volume expansion, through a combined utilization of medium-to-high energy accelerators and interferometric surface profilometry, was established. The technique was successfully applied to a characterization of swelling behavior in beta-silicon carbide arising from the accumulation of point defects at relatively...

BACKGROUND Non-menstrually-related swelling symptoms (idiopathic oedema) are common in women. The community prevalence of such symptoms, their association with other symptoms, and their underlying aetiology, are uncertain. AIM To determine the community prevalence of swelling symptoms and the independent contributions of major risk factors. DESIGN Comparison of major risk factors in women w...

Swelling parameters were determined for 15 seed species; the swelling quotients were found to range from less than 1.1 (castorbean) to 2.8 (mungbean) and swelling coefficients ranged from 0.09 (castorbean) to 0.42 (cowpea). Swelling leads to a lowering of specific gravity of those seeds with high initial specific gravity, and an elevation of those with low initial specific gravity. The extent o...