A chemical derivative of xanthan gum polysaccharide is investigated as a new artificial matrix for the encapsulation of chondrocytic cells. Toward this goal, a novel micro-droplet generator is developed to produce microcapsules. Microcapsules with an average diameter of 500 µm, smooth surface, and homogeneous size distribution are obtained. ATDC5 cells encapsulated in carboxymethyl xanthan (CMX...

The aim of this study was to investigate the influence of pH, buffer species and ionic strength on the release mechanism of chlorpheniramine maleate (CPM) from matrix tablets containing chitosan and xanthan gum prepared by a hot-melt extrusion process. Drug release from hot-melt extruded (HME) tablets containing either chitosan or xanthan gum was pH and buffer species dependent and the release ...

A streptomycin-resistant variant of Xanthomonas campestris was grown in defined nutrient-deficient media in both batch and continuous culture. The production, composition and viscosity of the extracellular polysaccharide (xanthan) synthesized by this strain were influenced by the fermentation time and nutrient exhaustion in batch culture and by the dilution rate in continuous culture. The speci...

Volumetric mass transfer coefficient (kLa) is an important parameter in bioreactors handling viscous fermentations such as xanthan gum production, as it affects the reactor performance and productivity. Published literatures showed that adding an organic phase such as hydrocarbons or vegetable oil could increase the kLa. The present study opted for palm oil as the organic phase as it is plentif...

This paper presents an extensive series of laboratory works and a prediction model on the design road pavement subgrade with Xanthan Gum (XG) biopolymer. The experimental were carried out using mixtures conventional aggregate for construction XG at ratios 0%, 1%, 2%, 5%, by dry weight. Unconfined compressive strength (UCS) California bearing ratio (CBR) tests conducted during end various curing...

Floating matrix tablets of Cephalexin were prepared by using synthetic and natural polymers each in two different concentrations. The floating properties and in-vitro drug release properties were optimized and total 10 formulations were developed. The synthetic and natural polymers used were HPMC K4M, HPMC K15M and Guar Gum, Xanthan gum respectively. Each formulation consists of polymer in any ...

For modeling biological systems the already existing Petri Net Libraries were further developed with OpenModelica using the SimForge graphical user interface (GUI). The Petri Nets elements were wrapped into models for different reaction types to simplify the modeling process. Additionally, a database connection was implemented for integrating kinetic data. The application of this new Reaction L...

The objectives of the present study were to analyze the chemical interactions between guar and xanthan gums and starches. Gels were obtained from normal (NCS), waxy (WCS) and high-amylose (HACS) corn starches containing gums. The gels were evaluated according to their pasting properties and infra-red absorption. The guar (GG) and xanthan (XG) gums affected the properties of the NCS paste more s...