scholarly journals Germinated Wheat Starch as a Substrate to Produce Cyclodextrins: Application in Inclusion Complex to Improve the Thermal Stability of Orange Essential Oil

2019 ◽  
Vol 72 (1-2) ◽  
pp. 1900083
Author(s):  
Dianini Hüttner Kringel ◽  
Julia Baranzelli ◽  
Jéssie Da Natividade Schöffer ◽  
Shanise Lisie Mello El Halal ◽  
Martha Zavariz De Miranda ◽  
...  
Keyword(s):  
Thermal Stability ◽  
Essential Oil ◽  
Inclusion Complex ◽  
Wheat Starch ◽  
Thermal Stability Of ◽  
Orange Essential Oil

Polypseudorotaxane Hydrogels Based on F127 Block-Selected Inclusion Complexation with α-Cyclodextrin

2012 ◽  
Vol 482-484 ◽  
pp. 1898-1903
Author(s):  
Ying Xue Zhou ◽  
Xiao Dong Fan ◽  
Dan Xue
Keyword(s):  
Thermal Stability ◽  
Inclusion Complex ◽  
Inclusion Complexation ◽  
Wide Angle ◽  
Acryloyl Chloride ◽  
X Ray Diffraction ◽  
Scanning Calorimetry ◽  
X Ray ◽  
Thermal Stability Of ◽  
Channel Type

Supramolecular hydrogels were formed through F127, acryloyl chloride modified F127 inclusion complex with α-cyclodextrin, respectively. The structure of modified copolymers and inclusion complex was characterized by Fourier transform infrared spectroscopy (FTIR) and hydrogen nuclear magnetic resonance (1H-NMR). Hydrogels formed from supramolecular inclusion are imparted channel-type structure investigated by wide angle x-ray diffraction (WAXRD). Differential scanning calorimetry (DSC) and TG experiments showed that thermal stability of hydrogels depend on the nature of axis polymer. The relative model was proposed to elucidate the inclusion complexes and hydrogels formation.

scholarly journals Influence of Nano-encapsulation on Chemical Composition, Antioxidant Activity and Thermal Stability of Rosemary Essential Oil

2017 ◽  
Vol 12 (3) ◽  
pp. 170-177 ◽  
Author(s):  
Ahmed M.S. Hussein ◽  
Mohie M. Kamil ◽  
Shereen N. Lotfy ◽  
Khaled F. Mahmoud ◽  
Fathy M. Mehaya ◽  
...  
Keyword(s):  
Thermal Stability ◽  
Antioxidant Activity ◽  
Chemical Composition ◽  
Essential Oil ◽  
Thermal Stability Of ◽  
Rosemary Essential Oil

Physicochemical and Thermal Stability of Microcapsules of Cinnamon Essential Oil by Spray Drying

2016 ◽  
Vol 41 (3) ◽  
pp. e12919 ◽  
Author(s):  
Pedro Henrique Campelo Felix ◽  
Viviane Santos Birchal ◽  
Diego Alvarenga Botrel ◽  
Gerson Reginaldo Marques ◽  
Soraia Vilela Borges
Keyword(s):  
Thermal Stability ◽  
Essential Oil ◽  
Spray Drying ◽  
Cinnamon Essential Oil ◽  
Thermal Stability Of

Preparation, Characterization, and Biotransformation of the Inclusion Complex of Phytosterols and Hydroxypropyl-β- cyclodextrin by Mycobacterium neoaurum

2011 ◽  
Vol 66 (5-6) ◽  
pp. 277-282
Author(s):  
Wenjun Wang ◽  
Longjiang Yu
Keyword(s):  
Thermal Stability ◽  
Thermogravimetric Analysis ◽  
Ir Spectroscopy ◽  
Inclusion Complex ◽  
Aqueous Medium ◽  
Mycobacterium Neoaurum ◽  
Thermal Stability Of

The inclusion complex of hydroxypropyl-β-cyclodextrin (HBβCD) and phytosterols (PSs) was prepared and characterized by thermogravimetric analysis (TGA) and infrared (IR) spectroscopy. Biotransformation of the inclusion complex of phytosterols and hydroxypropyl- β-cyclodextrin (PSs-HBβCD) by Mycobacterium neoaurum to 1,4-androstadiene-3,17-dione and 4-androstene-3,17-dione [AD(D)] was studied. The TGA and IR results indicated that the thermal stability of PSs was improved in the complex with HBβCD. Biotransformation improved the solubility of PSs in the aqueous medium a lot because the AD(D) production was increased remarkably compared with the control, but growth of the bacteria was inhibited in the presence of HBβCD. The optimal inclusion ratio, ultrasonic treating time, dosage, and time of addition of PSs-HBβCD complexe were found to be 2:1, 10 min, 1.5 g/30 ml medium, and 48 h after incubation, respectively. This inclusion technique not only increased the availability of the substrates for the microorganisms, but also the capability of these microorganisms to produce AD(D) from PSs.

Eugenol Supplementation as an Additive to Improve the Thermal Stability of Hedychium coronarium Koening Essential Oil

2020 ◽  
Vol 10 (3) ◽  
pp. 279-285
Author(s):  
Julyleth P.J. Macias ◽  
Ricardo I. Castro ◽  
Saray K.G. Esguerra ◽  
Jaime G. Marin ◽  
Luis Guzman ◽  
...  
Keyword(s):  
Thermal Stability ◽  
Essential Oil ◽  
Biological Activities ◽  
Wide Spectrum ◽  
Antioxidant Properties ◽  
Antioxidant Additive ◽  
Strong Light ◽  
Hedychium Coronarium ◽  
Pharmaceutical Industries ◽  
Thermal Stability Of

Background: Eugenol is a phenolic compound with a wide spectrum of biological activities such as antibacterial and antioxidant. Objective: Eugenol is an ideal candidate as a natural antioxidant additive, especially for those substances that are affected by lipoperoxidation process, this is the case of essential oils that have an important role in the food, perfumery and pharmaceutical industries, which easily deteriorate under high temperature, strong light, and reactive oxygen species. Methods: In order to evidence the influence of the addition of eugenol in the thermal properties of Hedychium coronarium Koening essential oil, were determined the chemical composition, antioxidant properties and TG/DTG analysis after the supplementation with different ratios of eugenol/essential oil. Results: The results showed a high content of oxygenated monoteropenes (50.33%), followed by monoterpene hydrocarbons (23.35%) and sesquiterpene (19.2%), the TG/DTG analysis presented a significant increment in the degradation temperature of the essential oil, being the major value 12 ºC at a supplementation of 4.7% (v/v) of eugenol. Conclusion: Finally, the supplementation with eugenol improved the thermal stability of the essential oil of Hedychium coronarium Koening, which could be applicable to other oils thereby improving their physicochemical properties.

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