Recent studies have shown that the highly susceptibility to oxidation ofα-linolenic acid(ALA)enriched emulsion delivery system was harmful for human health which limited their incorporation into functional food.Impac...Recent studies have shown that the highly susceptibility to oxidation ofα-linolenic acid(ALA)enriched emulsion delivery system was harmful for human health which limited their incorporation into functional food.Impacts of natural sesamol(SOH)and sesamin(SES)on stability of flaxseed oil-in-water emulsion were investigated.Results showed that SOH indicated higher antioxidant activity and significantly prolonged the time of emulsion oil-off by retarding oil droplet aggregation in a dose dependent manner throughout storage.Moreover,SOH showed substantial extended lag phase of lipid oxidation products,especially for secondary oxidation products(thiobarbituric acid-reactive substances,TBARS),with a maximum reduction of 70%with 800 M dosage.The antioxidative efficiency of SOH might relate to its strong ability of scavenging free radical and chelate transition metal.Furthermore,SOH significantly enhanced interfacial barrier property and reduced permeation rate of peroxyl radical across emulsion interface by hydrogen bonds between sugar groups of saponin molecules and SOH.However,no obvious change in barrier property of emulsion was observed in SES.SOH improved physicochemical property of flaxseed oil-in-water emulsion with higher antioxidant activity and stronger interfacial barrier property,so that it could be serve as plant-based antioxidant in oil-in-water emulsion delivery system.展开更多
This study reports the applicability of quillaja saponin(QS)as a vigorous and environmentally friendly shale swelling inhibitor.QS is a natural surfactant,which is extracted from herbal sources.The inhibition strength...This study reports the applicability of quillaja saponin(QS)as a vigorous and environmentally friendly shale swelling inhibitor.QS is a natural surfactant,which is extracted from herbal sources.The inhibition strength of this surfactant was assessed through various experiments,such as sedimentation,inhibition,filtration,particle size,Scanning Electron Microscope(SEM)images,and cutting recovery.Data obtained from these tests illustrated that QS greatly inhibits clays from swelling.The optimal concentration for QS in this intend was 10 g/L.Compatibility of this surfactant with other common additives was also investigated,which showed that it is totally compatible.Finally,the potential inhibition mechanism was assessed through thermal gravimetric analysis(TGA),zeta potential,and contact angle measurement experiments.Surface coating,and wettability alteration of clay particles to the oil-wet state was recognized as the most probable mechanism.展开更多
基金financial support from the National Natural Science Foundation of China (31771938)the Earmarked Fund for China Agriculture Research System (CARS-14)partly based upon work supported by the National Institute of Food and Agriculture, USDA, Massachusetts Agricultural Experiment Station (MAS00491) and USDA, AFRI Grants (2016-08782)
文摘Recent studies have shown that the highly susceptibility to oxidation ofα-linolenic acid(ALA)enriched emulsion delivery system was harmful for human health which limited their incorporation into functional food.Impacts of natural sesamol(SOH)and sesamin(SES)on stability of flaxseed oil-in-water emulsion were investigated.Results showed that SOH indicated higher antioxidant activity and significantly prolonged the time of emulsion oil-off by retarding oil droplet aggregation in a dose dependent manner throughout storage.Moreover,SOH showed substantial extended lag phase of lipid oxidation products,especially for secondary oxidation products(thiobarbituric acid-reactive substances,TBARS),with a maximum reduction of 70%with 800 M dosage.The antioxidative efficiency of SOH might relate to its strong ability of scavenging free radical and chelate transition metal.Furthermore,SOH significantly enhanced interfacial barrier property and reduced permeation rate of peroxyl radical across emulsion interface by hydrogen bonds between sugar groups of saponin molecules and SOH.However,no obvious change in barrier property of emulsion was observed in SES.SOH improved physicochemical property of flaxseed oil-in-water emulsion with higher antioxidant activity and stronger interfacial barrier property,so that it could be serve as plant-based antioxidant in oil-in-water emulsion delivery system.
基金All authors are inclined to appraise the laboratory facilities provided by petroleum engineering department of Amirkabir University of Technology(AUT)for this project.
文摘This study reports the applicability of quillaja saponin(QS)as a vigorous and environmentally friendly shale swelling inhibitor.QS is a natural surfactant,which is extracted from herbal sources.The inhibition strength of this surfactant was assessed through various experiments,such as sedimentation,inhibition,filtration,particle size,Scanning Electron Microscope(SEM)images,and cutting recovery.Data obtained from these tests illustrated that QS greatly inhibits clays from swelling.The optimal concentration for QS in this intend was 10 g/L.Compatibility of this surfactant with other common additives was also investigated,which showed that it is totally compatible.Finally,the potential inhibition mechanism was assessed through thermal gravimetric analysis(TGA),zeta potential,and contact angle measurement experiments.Surface coating,and wettability alteration of clay particles to the oil-wet state was recognized as the most probable mechanism.
