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Istituto di scienza dell'alimentazione

Torna all'elenco Contributi in rivista anno 2016

Contributo in rivista

Tipo: Articolo in rivista

Titolo: Oxidative Stability of Pomegranate (Punica granatum L.) Seed Oil to Simulated Gastric Conditions and Thermal Stress

Anno di pubblicazione: 2016

Autori: Siano, Francesco; Addeo, Francesco; Volpe, Maria Grazia; Paolucci, Marina; Picariello, Gianluca

Affiliazioni autori: CNR; Univ Naples Federico II; Univ Sannio

Autori CNR:

  • GIANLUCA PICARIELLO
  • FRANCESCO SIANO
  • MARIA GRAZIA VOLPE

Lingua: inglese

Abstract: The fatty acid composition of pomegranate (Punica granatum L.) seed oil (PSO) is dominated by punicic acid, a conjugated linolenic acid (18:3 omega-5). As a free fatty acid, punicic acid is rapidly oxidized in air and extensively isomerizes upon acid-catalyzed methylation at 90 degrees C. In contrast, triacylglycerol-bound punicic acid in PSO was unchanged by simulated gastric conditions and was degraded by 5-7% by severe heating (up to 170 degrees C for 4 h), as herein assessed by gas chromatography, attenuated total reflectance-Fourier transform infrared spectroscopy, H-1 and C-13 NMR, and high-resolution electrospray ionization mass spectrometry. Total polar compounds of PSO were slightly affected by thermal stress, accounting for 5.71, 6.35, and 9.53% (w/w) in the unheated, heated at mild temperature (50 degrees C, 2 h), and heated at frying temperature (170 degrees C, 4 h) PSO, respectively. These findings support from a structural standpoint the potential use of PSO as a health -promoting edible oil.

Lingua abstract: inglese

Pagine da: 8369

Pagine a: 8378

Pagine totali: 10

Rivista:

Journal of agricultural and food chemistry American Chemical Society, Books and Journals Division]
Paese di pubblicazione: Stati Uniti d'America
Lingua: inglese
ISSN: 0021-8561

Numero volume: 64

Numero fascicolo: 44

DOI: 10.1021/acs.jafc.6b04611

Referee: Sė: Internazionale

Stato della pubblicazione: Published version

Indicizzato da: ISI Web of Science (WOS) [000387624900012]

Parole chiave:

  • pomegranate seed oil
  • punicic acid
  • conjugated linolenic acids
  • oxidative stability
  • isomerization of fatty acids

Strutture CNR:

 
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