alpha-cyclodextrin and 1-methylcyclopropene
alpha-cyclodextrin has been researched along with 1-methylcyclopropene* in 2 studies
Other Studies
2 other study(ies) available for alpha-cyclodextrin and 1-methylcyclopropene
Article | Year |
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Dissociation characteristic of the inclusion complex of cyclomaltohexaose (alpha-cyclodextrin) with 1-methylcyclopropene in response to stepwise rising relative humidity.
The dissociation of a crystalline complex of cyclomaltohexaose (alpha-cyclodextrin) and 1-methylcyclopropene has been studied in response to stepwise rising relative humidity at 50 degrees C using a dynamic vapor sorption instrument. The dissociation of the inclusion complex was monitored with a proton transfer reaction mass spectrometer. The increase in relative humidity generally triggered the complex dissociation. However, the dissociation was greatly retarded at 80% relative humidity, presumably owing to collapse of the crystalline structure. Abrupt dissociation was observed at 90% relative humidity which corresponded to complex dissolution. The changes in powder X-ray diffraction pattern of the inclusion complex during the storage period were also investigated. Topics: alpha-Cyclodextrins; Cyclopropanes; Humidity; Microscopy, Electron, Scanning; X-Ray Diffraction | 2010 |
Kinetics of molecular encapsulation of 1-methylcyclopropene into alpha-cyclodextrin.
1-methylcyclopropene (1-MCP), an ethylene inhibiting regulator, is commercially available in the form of an inclusion complex with alpha-cyclodextrin (alpha-CD). In this study, molecular encapsulation of gaseous 1-MCP into aqueous alpha-CD was investigated in a closed, agitated vessel with a flat gas-liquid interface. Molecular encapsulation of gaseous 1-MCP by alpha-CD is a simultaneous two-step reaction which involves the aqueous dissolution of gaseous 1-MCP and the encapsulation of the dissolved molecules by alpha-CD. The kinetics and mechanism of molecular encapsulation were analyzed based on the depletion rate of 1-MCP in the headspace of the vessel. The encapsulation rates could be explained quantitatively by the gas absorption theory with a pseudo-first-order reaction between 1-MCP and alpha-CD. The negative value of the calculated apparent activation energy of encapsulation (-24.4 kJ/mol) implied the significant effect of exothermic aqueous dissolution of 1-MCP. An encapsulation temperature of 15 degrees C was optimal; at this temperature, the highest 1-MCP yield and best inclusion ratio of inclusion complex were obtained. Changes in the X-ray diffraction pattern suggested that the crystal lattice structure of alpha-CD was altered upon inclusion of 1-MCP. Topics: Agrochemicals; alpha-Cyclodextrins; Capsules; Cyclopropanes; Gases; Kinetics; Solutions; Thermodynamics; X-Ray Diffraction | 2007 |