pistachio oil
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Author(s):  
María V. Salinas ◽  
Luciano M. Guardianelli ◽  
Leonardo P. Sciammaro ◽  
Gianluca Picariello ◽  
Gianfrano Mamone ◽  
...  

2020 ◽  
Vol 71 (2) ◽  
pp. 360
Author(s):  
V. M. Fantino ◽  
R. M. Bodoira ◽  
M. C. Penci ◽  
P. D. Ribotta ◽  
M. L. Martínez

Pistachio nuts have high economical and nutritional value, mostly due to their elevated oil con­tent (50%), which is composed mainly of oleic and linoleic fatty acids. Box-Behnken experimental designs were performed to optimize the oil extraction by response surface analysis. The independent variables measured were seed moisture content (SMC), restriction die (RD), screw press speed (PS) and pressing temperature (PT), while the response variables considered were oil recovery (OR), fine solid contents in the oil (FSC), oil remain­ing in the cake (OC) and parameters related to oil quality (free fatty acid composition (FFAC, mg KOH/g oil), peroxide value (PV, meq O2/kg oil), K232, K270 and pigment contents, mg/kg oil). Given that the chemical quality of pistachio nut oil pressed under different conditions was not affected, the process response was optimized in order to maximize OR under two pressing temperatures. Therefore, at 75 °C, pistachio oil extraction showed a maximum OR (79.61 g/100 g oil) at 8% SMC, 4 mm RD and 20 rpm SP; while, under cold-pressed conditions, the maximum OR (65.97 g/100 g oil) was achieved at 10% SMC, 4mm RD and 20 rpm SP. It is important to highlight that OR values were higher than the results reported previously and the chemical quality parameters from both oils were in the range of Codex standards for virgin (non-refined) oils (FFAC < 0.31 and PV < 0.33).


Molecules ◽  
2020 ◽  
Vol 25 (7) ◽  
pp. 1614
Author(s):  
Lydia Valasi ◽  
Dimitra Arvanitaki ◽  
Angeliki Mitropoulou ◽  
Maria Georgiadou ◽  
Christos S. Pappas

The aim of this work was to characterize the pistachio oil of the Greek variety, “Aegina”, evaluate its various quality indices, and investigate the potential use of FTIR as a tool to discriminate different oil qualities. For this purpose, the antioxidant capacity, the tocopherol content and the oxidation and degradation of fatty acids, as described by k, Δk, R-values, and free acidity were evaluated using 45 samples from eight different areas of production and two subsequent years of harvesting. The antioxidant capacity was estimated using 2,2′-azinobis(3-ethylbenzothiazoline-6-sulfonic acid diammonium salt (ABTS) and 2,2-diphenyl-1-(2,4,6-trinitrophenyl)hydrazine (DPPH) assays, and the tocopherol content was quantified through HPLC analysis. FTIR spectra were recorded for all samples and multivariate analysis was applied. The results showed significant differences between the oil samples of different harvesting years, which were successfully discriminated by a representative FTIR spectral region based on R-value, total antioxidant capacity, and scavenging capacity, through ABTS. A similar approach could not be confirmed for the other quality parameters, such as the free acidity and the tocopherol content. This research highlighted the possibility of developing a simple, rapid, economic, and environment friendly method for the discrimination of pistachio oils according to their quality profile, through FTIR spectroscopy and multivariate analysis.


2020 ◽  
Author(s):  
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2020 ◽  
pp. 593-597
Author(s):  
Sabine Krist
Keyword(s):  

2018 ◽  
Vol 264 ◽  
pp. 49-57 ◽  
Author(s):  
Adrián Rabadán ◽  
Lourdes Gallardo-Guerrero ◽  
Beatriz Gandul-Rojas ◽  
Manuel Álvarez-Ortí ◽  
José Emilio Pardo

2018 ◽  
Vol 120 (10) ◽  
pp. 1800221 ◽  
Author(s):  
Rosa M. Ojeda-Amador ◽  
Serena Trapani ◽  
Giuseppe Fregapane ◽  
María D. Salvador
Keyword(s):  

LWT ◽  
2017 ◽  
Vol 83 ◽  
pp. 79-85 ◽  
Author(s):  
Adrián Rabadán ◽  
Manuel Álvarez-Ortí ◽  
Ricardo Gómez ◽  
Andrés Alvarruiz ◽  
José E. Pardo

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