The effects of Naþ, Kþ, Caþþ and Mgþþ cations on the sol–gel transitions of high acyl (HA) gellan dispersions were investigated. Gelling temperatures of 1% HA gellan dispersions containing selected cations (monovalent cations, 10–200 mM; divalent cations, 2–80 mM) were determined using dynamic rheological analysis. Gelling temperatures increased with cation concentrations. Divalent cations exhi...

We specify the black box behavior of data ow components by characterizing the relation between the input and the output histories We distinguish between three main classes of such speci cations namely time independent speci cations weakly time dependent speci cations and strongly time dependent speci cations Data ow components are semantically modeled by sets of timed stream processing function...

Fragmented sarcoplasmic reticulum isolated from skeletal muscle of the rabbit has a cation-binding capacity of about 350 microeq/g of protein at neutral pH. The same binding sites bind Ca, Mg, K, and H ions and, consequently, the selective binding of Ca induced by ATP releases an amount of the other cations equivalent to the Ca taken up. At pH values below 6.2, an increasing number of binding s...

The aim of this study was to develop an extended-release tablet formulation using a new in situ cross-linking method. The effects of polyvalent cations on theophylline release from tablets made with the polyanionic polymers sodium alginate and sodium carboxymethylcellulose, were investigated. Different miliequivalents of the di and tri-valent cation, Ca2+ and Al3+, were added to tablet form...

The aim of this study was to develop an extended-release tablet formulation using a new in situ cross-linking method. The effects of polyvalent cations on theophylline release from tablets made with the polyanionic polymers sodium alginate and sodium carboxymethylcellulose, were investigated. Different miliequivalents of the di and tri-valent cation, Ca2+ and Al3+, were added to tablet form...