The pgmG gene of Sphingomonas paucimobilis ATCC 31461, the industrial gellan gum-producing strain, was cloned and sequenced. It encodes a 50,059-Da polypeptide that has phosphoglucomutase (PGM) and phosphomannomutase (PMM) activities and is 37 to 59% identical to other bifunctional proteins with PGM and PMM activities from gram-negative species, including Pseudomonas aeruginosa AlgC. Purified P...

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...

The mechanical characteristics of ionic-covalent entanglement hydrogels consisting of combinations of the biopolymers gellan gum and kappa-carrageenan, and the synthetic polymers polyacrylamide and an epoxy amine were investigated. Compression testing showed that these gels exhibited "double network" behavior, i.e. strong tough gels.

It has been demonstrated that bone marrow mesenchymal stem cell (BM-MSCs) transplantation has beneficial effects on several central nervous system (CNS) debilitating conditions. Growing evidence indicate that trophic factors secreted by these cells are the key mechanism by which they are acting. These cells are frequently used in combination with 3D artificial matrices, for instance hydrogels, ...

The impact of browning intensity on interfacial properties gellan gum-soy protein conjugate obtained through the Maillard reaction

The present investigation was aimed to formulate and characterize ion-activated in-situ gel loaded with Rizatriptan Benzoate (RIZ) for intranasal administration brain targeting. further optimized process formulation parameters by using 32 factorial design. batch having the concentrations of gellan gum HPMC E15 LV 33.83 mg 9.6 respectively. Gel strength mucoadhesive were found be 32.54 sec 2580....

We have developed a novel gel trapping technique (GTT) which allows the three-phase contact angle of microparticles to be determined at an air-water or an oil-water interface. The method is applicable for particle diameters ranging from several hundred nanometers to several hundred micrometers. We also used the GTT for replicating of particle monolayers at liquid surfaces and for preparation of...