Synthesis and characterization of citric acid crosslinked carboxymethyl tamarind gum-polyvinyl alcohol hydrogel films.

The aim of present work was to synthesize and characterize carboxymethyl tamarind gum-polyvinyl alcohol (CMTG-PVA) hydrogel films using citric acid (CA) as a crosslinker. Hydrogel films were prepared by solvent casting technique. The films were evaluated for total carboxyl content (TCC), tensile strength, protein adsorption, permeability properties, hemocompatibility, swellability, moxifloxacin (MFX) loading and release, in-vivo wound healing activity and characterized using instrumental techniques.

Comparison of techniques for the extraction of Camptothecin from Tabernaemontana species.

Extraction methods like maceration, ultrasonication, vortex mixer, soxhlet extraction and microwave assisted extraction (MAE), were evaluated for the extraction of Camptothecin (CPT) from the leaves and stem of , and . The extracts were analyzed by high performance thin layer chromatography (HPTLC). The results show that the leaves of exhibited highest yield of CPT as compared to the other species.

Citric acid crosslinked carboxymethylcellulose-poly(ethylene glycol) hydrogel films for delivery of poorly soluble drugs.

In present work, carboxymethylcellulose (CMC) - polyethylene glycol (PEG) hydrogel films were prepared using citric acid as a non-toxic crosslinking agent, for the controlled delivery of model hydrophobic drug (ketoconazole). The carboxyl content of the hydrogel films were determined by acid-base titration. The films were characterized by solid state C NMR, ATR-FTIR, TGA and DSC, and evaluated for swelling behavior, drug loading, drug release, hemocompatibility, in vitro cytotoxicity and implantation test.

Citric acid crosslinked β-cyclodextrin/carboxymethylcellulose hydrogel films for controlled delivery of poorly soluble drugs.

Citric acid crosslinked β-cyclodextrin-carboxymethylcellulose (βCD-CMC) hydrogel films were prepared by esterification-crosslinking method for the controlled release of ketoconazole (model drug). The hydrogel films were evaluated for active βCD content, carboxyl content, swelling ratio, drug loading and release, and hemolytic activity. The structural characterization was carried out using solid state C NMR, ATR-FTIR, TGA and DSC analysis.

Citric acid crosslinked cyclodextrin/hydroxypropylmethylcellulose hydrogel films for hydrophobic drug delivery.

The present communication deals with preparation of β-cyclodextrin (βCD) grafted hydroxypropylmethylcellulose (HPMC) hydrogel films using citric acid as crosslinking agent with the aim of improving the loading and achieving controlled release of hydrophobic weak base (ketoconazole). The hydrogel films were characterized by attenuated total reflectance-fourier transform infrared (ATR-FTIR) spectroscopy, solid state C-nuclear magnetic resonance (C NMR) spectroscopy, thermal analysis and scanning electron microscopy (SEM). The films were evaluated for βCD content, carboxyl content, swelling ratio, drug loading, drug release and hemolytic assay.