Oxidative stability of O/W and W/O/W emulsions: Effect of lipid composition and antioxidant polarity

Poyato, Candelaria; Navarro-Blasco, Í.; Calvo, María Isabel; Cavero, Rita Yolanda; Astiasarán, Icíar; Ansorena, Diana

doi:10.1016/j.foodres.2012.11.032

Cited by 98 publications

(67 citation statements)

References 40 publications

Supporting

Mentioning

Contrasting

Unclassified

Order By: Relevance

“…TBARS values were determined according to the method described by Poyato et al [24]. Briefly, an aliquot (1 mL) of sample was transferred to a tube and chloroform was evaporated under a stream of N 2.…”

Section: Tbarsmentioning

confidence: 99%

Cholesterol and stigmasterol within a sunflower oil matrix: Thermal degradation and oxysterols formation

et al. 2015

Self Cite

View full text Add to dashboard Cite

The characteristics of the lipid matrix surrounding sterols exert a great influence in their thermal oxidation process. The objective of this work was to assess the oxidation susceptibility of equal amounts of cholesterol and stigmasterol within a sunflower oil lipid matrix (ratio 1:1:200) during heating (180 ºC, 0 to 180 min). Remaining percentage of sterols was determined and seven sterol oxidation products (SOPs) were analyzed for each type of sterol along the heating treatment. Evolution of the fatty acid profile and vitamin E content of the oil was also studied. Overall oxidation status of the model system was assessed by means of Peroxide Value (PV) and TBARS. PV remained constant from 30 min onwards and TBARS continued increasing along the whole heating treatment.Degradation of both cholesterol and stigmasterol fitted a first order curve (R 2 = 0.937 and 0.883, respectively), with very similar degradation constants (0.004 min -1 and 0.005 min -1 , respectively). However, higher concentrations of oxidation products were found from cholesterol (79 µg/mg) than from stigmasterol (53 µg/mg) at the end of the heating treatment. Profile of individual oxidation products was similar for both sterols, except for the fact that no 25-hydroxystigmasterol was detected. 7α-hydroxy and 7-ketoderivatives were the most abundant SOPs at the end of the treatment. PUFA and vitamin E suffered a significant degradation along the process, which was correlated to sterols oxidation.

show abstract

Section: Tbarsmentioning

confidence: 99%

Cholesterol and stigmasterol within a sunflower oil matrix: Thermal degradation and oxysterols formation

et al. 2015

Self Cite

View full text Add to dashboard Cite

show abstract

“…This fact leads to underestimation of oxidation in highly monounsaturated lipids when TBARS test is used (Waraho, Cardenia, Rodríguez-Estrada, McClements & Decker, 2009;Poyato, Navarro-Blasco, Calvo, Cavero, Astiasarán & Ansorena, 2013). Consequently, MDA measurements at 532 nm may not be true measure of oxidative deterioration in certain foods.…”

Section: Introductionmentioning

confidence: 99%

A novel approach to monitor the oxidation process of different types of heated oils by using chemometric tools

Poyato

Ansorena

Navarro-Blasco

et al. 2014

Food Research International

Self Cite

View full text Add to dashboard Cite

The oxidative stability of seven oils with different fatty acid profiles was assessed.Oxidation at 0, 2 and 4h at 180ºC was monitored by measuring the absorbance of thiobarbituric acid reactive substances (TBARS) along the absorption spectrum (300-600 nm), the volatile aldehydes (HS-SPME-GC-MS) and the fatty acid profile (FID-GC).TBARS absorption spectrum behavior depended on the lipid composition of heated oils.Higher absorbance increments during heating were noticed at 390 nm compared to 532 nm (from 2 to 21 fold higher depending on the oil), pointing to its better sensitivity to detect oxidation. Furthermore, a close relationship between ABS 390 , the loss of

show abstract

“…Para ello, se prepa- Tamaño: Se realizó por el método de Poyato et al [13] , haciendo una medición del diámetro de las micelas en un microscopio óptico Ziess Primo Star (Carl Zeiss Microscopy GmbH), adicionado con una cámara AxioCamERc 5s Ziess (Alemania). Después, se caracterizaron por tamaño de micelas encontradas en 3 campos (40x).…”

Section: Preparación De Las Emulsiones De Aet Y Aerunclassified

Effect of Microemulsions of Essential Oils on Human Erythrocyte and Pathogens Bacteria

López-Mata¹

2017

Rev. Mex. Ing. Biomed.

View full text Add to dashboard Cite

RESUMENEl objetivo del presente trabajo fue evaluar el efecto de las microemulsiones de aceite esencial de romero (AER) y ár-bol de té (AET) sobre el eritrocito humano y microorganismos patógenos. Para ello, se elaboraron microemulsiones de AER y AET al 8.0% (v/v), 5.0% (v/v) y 2.5% (v/v). Las microemulsiones fueron probadas sobre el eritrocito humano para determinar el porcentaje de hemólisis, el porcentaje de inhibición de hemólisis y su actividad antibacterial contra E. coli O157:H7 y S. aureus. Las microemulsiones con AER no presentaron actividad hemolítica significativa, caso contrario con las microemulsiones de AET al 8.0% (≈70%) y 5.0% (33%) que presentaron mayor actividad hemolítica. Las microemulsiones de AER protegieron significativamente al eritrocito contra la presencia de radicales libres, en comparación con aquellas de AET (p< 0.05). Además, las emulsiones de AET al 8.0% mostraron efectos antibacterianos contra E. coli O157:H7 y S. aureus mientras que AER al 8.0% solo mostraron efecto contra E. coli O157:H7. La limitante del estudio fue que no utilizamos células nucleadas para establecer si los aceites esenciales dañan el material nuclear. Sin embargo, observamos que el tipo y la cantidad de aceite utilizado pueden tener implicaciones serias sobre la membrana eritrocitaria. Se concluye que las microemulsiones de AER presentaron mejor efecto protector eritrocitario, mientras que las microemulsiones de AET presentaron mejor actividad antibacterial contra las bacterias estudiadas, pero con mayor efecto tóxico sobre el eritrocito.

show abstract

Oxidative stability of O/W and W/O/W emulsions: Effect of lipid composition and antioxidant polarity

Cited by 98 publications

References 40 publications

Cholesterol and stigmasterol within a sunflower oil matrix: Thermal degradation and oxysterols formation

Cholesterol and stigmasterol within a sunflower oil matrix: Thermal degradation and oxysterols formation

A novel approach to monitor the oxidation process of different types of heated oils by using chemometric tools

Effect of Microemulsions of Essential Oils on Human Erythrocyte and Pathogens Bacteria

Contact Info

Product

Resources

About