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Showing 1 to 20 of 41 for “"beta-cyclodextrin"”.
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Polypyrrole modified with sulfonated beta-cyclodextrin: Controlled release of DA and host-guest complexation properties
… electroytes, predominantly, a large anionic cyclodextrin [SB-CD]. The presence of the SB-CD dopant was confirmed using SEM/EDAX. It was shown that the SB-CD-doped PPy films have cation exchange properties and the oxidation and reduction of the polymer is accompanied by solvent, H20, exchange. …
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The study of [beta]-cyclodextrin interactions with sugars using "inhibition kinetics" and the bromination of pyrimidine derivatives
Part I . The binding of [beta]-cyclodextrin ([beta]-CD) with sugars was studied using "inhibition kinetics". The rates of hydrolysis of trimethyl orthobenzoate and benzaldehyde dimethyl acetal in acidic solution were monitored using a single beam stopped-flow spectrophotometer. Both substrates …
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Adsorption behaviour of molecularly imprinted-beta-cyclodextrin polymers prepared by reversible addition-fragmentation chain transfer (RAFT) polymerization for selective recognition of benzylparaben
… of MIPs, the modification monomer based on β-cyclodextrin (β-CD) and the essential of reversible addition�fragmentation chain transfer (RAFT) polymerization process were studied to generate potential MIPs. The study focuses on the characterization and adsorption behaviour of MIPs for selective …
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Synthesis and Study of Biomimetic Ion Channels: (1) Toward the Development of a Cyclic Peptide-Based Redox-Gated Channel, and (2) Investigations Into the Effect of Pore Size on the Ion Selectivity of an Aminocyclodextrin Channel
… and ion selectivity, a channel with an alpha-cyclodextrin macrocycle was synthesized and its transport properties were compared with those of an analogous channel with a larger beta-cyclodextrin pore. The anion transport profile of the alpha-cyclodextrin channel (ClO 4- > I- > Br- > NO3- > …
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Development of a synthetic enzyme for detection and quantitation of Thiols
… with the primary or secondary monotosylate of $\beta$-cyclodextrin yielded unique species based on RP-HPLC, and UV-Visible spectroscopy. After isolation by RP-HPLC, synzymes were examined for thiol oxidation under pseudo-first order conditions, and thiol oxidation rates were determined. Only the …
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Aminocyclodextrin Ion Channels: Development of a Model for Ligand Gating and Investigations of the Effects of Channel Structure on *Transport Properties and Ion Selectivity
… shown that a heptaaminopentabutylene glycol beta-cyclodextrin ion channel was highly active and selectively transported anions, the requirements for the number of aminopentabutylene glycol substitutions were not known. beta-Cyclodextrin channels with four and two aminopentabutylene glycol …
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Efficacy of Odor Scavengers in Reducing Odor Compounds in Water, Milk, and Soymilk
… life soymilk. The efficacy of odor scavenger's beta-cyclodextrin, D-sorbitol, and nylon 6 in removing these odors was also determined. The odor thresholds of the different odor and media combinations were as follows: hexanal in spring water, milk, and soymilk were 585, 339, and 536 ppb …
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The Investigation of Model Biological Systems Under High Pressure by Fluorescence Spectroscopy
… the binding of small ligands to polymers of (beta)-cyclodextrin, the interaction of ethidium bromide with phenylalanine-specific transfer ribonucleic acid from brewers yeast, and the pressure denaturation of lysozyme and chymotrypsinogen as detected by fluorescence polarization.
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Untersuchungen von Einschlusskomplexen aus Cyclodextrinen mit Aminosäuren und Dipeptiden
Die Cyclodextrin-modifizierte Kapillarelektrophorese (CE) ist eine wichtige chirale analytische Technik geworden, die zur HPLC und zur Gaschromatographie komplementär ist und sich deshalb für die Analyse der Abbauprodukte von Aspartam gut eignet. Ausgehend von diesen Abbauprodukten wurden im …
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Studies on the interaction of surfactants and neutral cyclodextrins by capillary electrophoresis. Application to chiral analysis
… composed of SDS in the presence of neutral cyclodextrins were considered. Firstly, the effect of the CDs on the CMC of the surfactant was evaluated by CE experiments. Furthermore, a new CE approach based on electric current measurement was developed for the estimation of the stoichiometry as …
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The use of cyclodextrin template-based metal oxide nanomaterials in the development of electrochemical sensors for phenolic endocrine disruptor compounds
… method in the presence and absence of beta-cyclodextrin β-CD). Such materials were characterized using transmission electron microscopy (TEM), energy dispersive X-ray spectroscopy (EDX), attenuated total reflection Fourier transform infrared (ATR-FTIR), X-ray diffraction (XRD), cyclic …
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Preparação e caracterização de complexos multicomponentes contendo ciclodextrinas e benznidazol
… the BNZ interactions in binary systems with beta cyclodextrin (β-CD) and hydroxypropyl-beta cyclodextrin (HP-β-CD), in order to increase the apparent aqueous solubility of drug. The influence of seven hydrophilic polymers, triethanolamine (TEA) and 1-methyl-2- pyrrolidone (NMP) in …
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Cholesterol and egg activation
… excess cholesterol using a cholesterol/methyl-[beta]-cyclodextrin complex, phenocopying SR-BI KO oocytes.
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Carbohydrate Mediation of Aqueous Polymerizations: Cyclodextrin Mediation of Aqueous Polymerizations of Methacrylates
Cyclodextrin mediation offers a unique mechanism with the potential for interesting control of reaction parameters. Cyclodextrin mediation of hydrophobic monomers may offer desirable kinetics over conventional free radical polymerizations, and it has been shown in this work that cyclodextrin …
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Preparation and Characterization of Lyophilized Cyclodextrin Complexes of a Hemisuccinate Ester of Delta-9-Tetrahydrocannabinol for Transmucosal Delivery
… form inclusion complexes with modified synthetic beta-cyclodextrins (CDs). The formation of 1:1 inclusion complexes of THC-HS with random methylated beta-cyclodextrin (RAMEB) and 2-hydroxypropyl beta-cyclodextrin (HPBCD) was demonstrated by an AL type curve with the slopes less than unity by the …
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Covalent Modification that Enhances Protein Properties and Functions and Folds Random Coil into Alpha-Helix
… surface adsorption by modifying proteins with beta-cyclodextrins (betaCD) via a squaramide linkage. As compared to native unmodified proteins, the beta-cyclodextrin-modified proteins (lysozyme and RNase A) exhibited significant reduction in aggregation, surface adsorption and increase in …
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Studies in synthetic carbohydrate chemistry: Part 1. Nitromethane cyclization of sugar polyaldehydes with a view to the synthesis of nitrocyclodextrins. Part 2. Approaches to the synthesis of 2-(R)-fluoro-daunosamine, a carbohydrate moiety for an antitumor drug.
… 4',6'-O-benzylidene-alpha-maltoside, and 6-deoxy-beta-cyclodextrin incorporate nitromethine functionalities by base-catalyzed reaction with nitromethane according to the general principle of nitroalkane cyclization of sugar dialdehydes, leading to 3-deoxy-3-nitro heptoseptanosides, …
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Interações da trancinolona com ciclodextrinas em sistemas multicomponentes
… The association of triamcinolone with cyclodextrins and co-solvents (triethanolamine TEA and N-methylpirrolidone NMP) was held to solubilize the drug and explain the involved interactions. Phase-solubility diagrams showed that triamcinolone was solubilized forming incredible stable …
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Polystyrene coated iron-platinum drug delivery platforms for theranostics
… (FTIR) and nuclear magnetic resonance (NMR). beta-cyclodextrin was attached to the surface of the nanoparticles using a click chemistry reaction. The hydrophobic cavity of the beta-cyclodextrin allows for the incorporation of hydrophobic drugs for subsequent delivery. These superparamagnetic …
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