To improve the stability and oral bioavailability of Z-ligustilide (LIG), the inclusion complex of LIG with hydroxypropyl- β-cyclodextrin (HP-β-CD) was prepared by the kneading method and characterized by UV-Vis spectroscopy, differential thermal analysis (DTA) and Fourier transform infrared (FTIR) spectroscopy. LIG is capable of forming an inclusion complex with HP-b-CD and the stoichiometry o...

shen) listed in the Chinese Pharmacopoeia (CP) is widely used traditional Chinese medicine to treat coronary heart disease, cerebrovascular disease, hepatocirrhosis and against bacteria. The chemical constituents of Salvia miltiorrhiza have been studied extensively and well documented. More than 30 diterpenoid quinone pigments, particularly known as tanshinones have been isolated and identified...

A green method for hydroxypropyl-β-cyclodextrin-glycerol-assisted extraction (HCGAE) of bioactive phenolics from S. montana, Lamiaceae was optimized using Box-Behnken design and response surface methodology compared conventional water/ethanol-based extraction. The procedure aimed at obtaining extracts with the maximum content total phenols (TP), flavonoids (TF), dihydroxycinnamic acids (TDCA), ...

Propanidid is a short acting anaesthetic with poor solubility in water. It was formerly marketed for clinical use as an intravenous (i.v.) anaesthetic in Cremophor EL (Epontol, propanidid 50 mg ml) but this was withdrawn due to anaphylactoid reactions to the vehicle. This paper reports on an aqueous formulation using hydroxypropyl-b-cyclodextrin (HP-b-CD) as a solubiliser. Phase solubility anal...

Cyclodextrins (CDs) are cyclic oligosaccharides that form inclusion complexes with lipophilic molecules through their hydrophobic central cavity. In this study, the effect of a-CD, hydroxylpropyl-b-CD (HP-bCD) and mixtures of these two CDs on the aqueous solubility of cyclosporine A (CyA) was investigated. Infrared spectroscopy and thermal analysis were used to confirm CyA-CD complex formation....

objective(s): the aim of this work was to investigate the effect of the natural and the chemically modified form of cyclodextrins namely; β-cyclodextrin (β-cd) and hydroxypropyl-β-cyclodextrin (hp-β-cd) respectively on the solubility and dissolution rate of aripiprazole; an antipsychotic medication showing poor aqueous solubility.   materials and methods: phase solubility of aripiprazole with t...

High molecular weight polymers and high polymer concentrations are desirable for the electrospinning of nanofibers since polymer chain entanglements and overlapping are important for uniform fiber formation. Hence, the electrospinning of nanofibers from non-polymeric systems such as cyclodextrins (CDs) is quite a challenge since CDs are cyclic oligosaccharides. Nevertheless, in this study, we h...

Amendment of a soil slurry with low concentrations of a cyclodextrin, hydroxypropyl-beta-cyclodextrin (HPCD), (0.05-0.5 g l(-1)) increased the phenanthrene mineralization rate of a microbial consortium by 25% under Fe(III)-reducing conditions. Although a higher concentration (5.0 g l(-1)) resulted in a faster initial rate of mineralization, mineralization ceased after 25 days with maximum miner...

The interaction between zaleplon (ZAL) and different cyclodextrins in aqueous solutions was investigated by spectrofluorimetric and phase solubility studies. Stability constants determined by both methods showed that among natural cyclodextrins, β-cyclodextrin (βCD) formed the most stabile complex but its solubilizing efficiency was limited. Among βCD derivatives, the complex stability and solu...