Effects of packaging and storage conditions on Iranian wild pistachio kernels and assessment of oxidative stability of edible extracted oil

Abstract

In the present research, Baneh Kernels (BK) (Pistacia atlantica var mutica, wild pistachio) were packaged with laminated‐type pouches of polyethylene/polyamide/polyethylene and polyester/aluminum foil/low‐density polyethylene (PET/AL/LDPE) under two packaging conditions (vacuum and conventional conditions) and were stored for 12 weeks at 20, 35, and 50°C. The oil of each sample was extracted and was evaluated for peroxide value, carbonyl value, total tocopherol, and total phenolic contents. No significant difference (p < 0.05) between the peroxide and carbonyl values at 20 and 35°C was observed while only an increase in these parameters (with a very small slope) was noted at 50°C. High levels of oxidative stability of BK samples can be correlated with low reduction in the content of antioxidants, especially tocopherols during storage, while it (reduction) was noted as17.9% in the worst condition. In this regard, (PET/AL/LLDPE) under vacuum was identified as the best packaging condition. Practical applications Baneh Kernels (BK) can be used as a good source of oil due to high oxidative stability. Moreover, the suitable packaging material for BK as well as an adjusted storage condition until processing (extraction) could play an important role in improving oxidative stability. In this context, the introduced packaging in this study can be approached to keep the quality of BK. Also, the proposed temperature could reduce the adverse effects of storage before processing.

Tunisian Pistacia atlantica Desf. Extraction Process: Impact on Chemical and Nutritional Characteristics

“…In a previous investigation carried out by Tavakoli et al., [ 47 ] the amount of these compounds in Pistacia atlantica var mutica kernel oil was reported as 725.28 mg kg −1 .…”

The Use of Salvia macrosiphon and Lepidium sativum Linn. Seed Gums in Nanoencapsulation Processes: Improving Antioxidant Activity of Potato Skin Extract

“…In order to measure the total phenolic content of different extracts and oil samples, a previously described method was used [17,23]. e estimation of phenolic compounds was performed at 765 nm using a UV-Vis spectrophotometer (Model 160A, Shimadzu, Japan) and calculated by a calibration curve (R2 � 0.99) performed with gallic acid (0 to 0.4 mg/mL).…”

Different effect of chemical refining process on Baneh (Pistacia atlantica var mutica) kernel oil: Regeneration of tocopherols

“…Total phenolic content was measured as established by Tavakoli et al. ( 2019b ). Folin–Ciocalteu reagent was used in this spectroscopic method at 765 nm (model 160A, Shimadzu, Tokyo) and calculated by a calibration curve ( R 2 = 0.99) performed with gallic acid (0 to 0.4 mg/ml).…”

“…The fruit of the Baneh tree consists of three parts: the outer oily green hull, the wood hull, and the kernel. Baneh kernels make up to 25% of Baneh fruit, and its oil yield is close to 50% (Padulosi & Hadj‐Hassan, 1998 ; Tavakolli et al., 2019b ). This species has three varieties, with mutica being the most famous and common Baneh variety, which comprises 90% of the population of these trees in Iran (Tavakoli et al., 2019b ).…”

“…Baneh kernels make up to 25% of Baneh fruit, and its oil yield is close to 50% (Padulosi & Hadj‐Hassan, 1998 ; Tavakolli et al., 2019b ). This species has three varieties, with mutica being the most famous and common Baneh variety, which comprises 90% of the population of these trees in Iran (Tavakoli et al., 2019b ). There have been various researches on Baneh crude oil.…”