Critical exponents and self-similarity for sol-gel transition in aqueous alginate systems induced by in situ release of calcium cations

Article Abstract:

Rheology methods are used to monitor the sol - gel transition in aqueous alginate systems induced by in situ released calcium cations. The critical exponents were independent of alginate concentration and close to the percolation prediction in alginate with lower molecular weight and in alginate with higher molecular weight, the critical exponents changed with alginate sample and concentration suggesting two categories of the gelation as growth and cross-link

All Other Miscellaneous Chemical Product and Preparation Manufacturing, Chemical preparations, not elsewhere classified, Alginate Chemicals, Cations, Chemical properties, Report

---

Nanostructure changes with Krafft transitions of polyelectrolyte-surfactant complexes in aqueous NaCl solutions

Article Abstract:

Temperature-scanning small-angle X-ray scattering (SAXS) and differential scanning calorimetric (DSC) measurements are used for studying nanostructure changes with the Krafft transition of complexes of poly(acrylicacid) with oactadecyltrimethylammonium (PAA-OTA) in the aqueous solutions at various NaCl concentrations. The results have shown that the nanostructure changes are accompanied with the endothermic enthalpy change.

Optical properties, Structure, Sodium chloride, X-ray analysis

---

Multiple steps and critical behaviors of the binding of calcium to alginate

Article Abstract:

The binding of calcium to alginate of low and high molecular weight and different guluronate/mannuronate ratios is investigated in dilute solutions using isothermal titration calorimetry (ITC), [Ca.sup.2+]-selective potentiometry and viscometry techniques. The results have revealed distinct and successive steps in the binding of calcium to alginate with increased concentration of Ca ions.

Volumetric analysis, Mechanical properties

Similar abstracts:

• Abstracts: Diffusion and cluster formation in one-dimensional systems with attractive interactions. Conformational changes of magnetic dipolar chains at a one-dimensional interface
• Abstracts: Prediction of partition coefficients of fluorous and nonfluorous solutes in fluorous biphasic solvent systems by mobile order and disorder theory
• Abstracts: Density functional theory study on the structure and capillary phase transition of a polymer melt in a slitlike pore: Effect of attraction
• Abstracts: Orientational melting and reorientational motion in a cubane molecular crystal: A molecular simulation study. Solid-state NMR characterization and determination of the orientational order of a nematogen
• Abstracts: Potentiometric determination of transport numbers of ternary electrolyte systems in charged membranes. Formation of stable Ag-nanoparticle aggregates induced by dithiol cross-linking

This website is not affiliated with document authors or copyright owners. This page is provided for informational purposes only. Unintentional errors are possible.